Common Error Code on Daikin Air Conditioning Unit

Common Daikin A/C Error Codes

A0 Error Code

Error Description:

The A0 error code on a Daikin air conditioning unit indicates that an external protection device connected to the terminal strip T1-T2 of the indoor unit has been activated. This error generally originates from the indoor unit and is triggered by the activation of an external safety mechanism designed to protect the system.

Need for a Technician:

Yes, resolving the A0 error typically requires a trained HVAC technician. The issue involves external wiring or connected protection devices, which require specialised tools and expertise to diagnose and repair.

Remedies for Untrained End-Users:

While the underlying issue requires professional attention, you can try these simple steps to reset the system safely before seeking further assistance:

1. Check for External Triggers:

• If you know of an external safety device connected to your unit, ensure it has not been manually or unintentionally activated. For example, this might include devices monitoring electrical or environmental conditions.

1. Power Down the Unit:

• Turn off the air conditioning unit using its remote or control panel.
• If the unit is connected via internal wall wiring, safely use your home’s switchboard to power down the circuit supplying electricity to the Daikin unit.

1. Wait and Restart:

• Leave the system powered off for 5-10 minutes to allow the safety mechanism to reset, then restore power via the switchboard.
• Turn the unit back on using the remote or control panel.

If the error reappears, the external device may still be detecting an issue or there could be a fault in the system, requiring professional servicing. Please don’t hesitate to ‘contact us’ or give us a free call on 1300 730 896 so we can organise a technician to assist you in resolving the error if the issue persists.

A1 Error Code

Error Description:

The A1 error code on a Daikin air conditioning unit indicates a malfunction of the indoor unit PCB (Printed Circuit Board). This error typically arises due to a defective indoor PCB or may occasionally be caused by external factors such as electrical noise interfering with the system’s operation.

Need for a Technician:

Yes, resolving the A1 error requires a trained HVAC technician. Diagnosing and repairing the indoor unit PCB involves working with delicate electronic components, which necessitates professional expertise and specialised tools.

Remedies for Untrained End-Users:

While the root cause of the A1 error is a technical issue requiring professional attention, you can try the following basic steps to reset the system safely before contacting a technician:

1. Power Down the Unit:

• Turn off the air conditioning unit using its remote or control panel.
• If the unit is connected via internal wall wiring, safely use your home’s switchboard to power down the circuit supplying electricity to the Daikin unit.

1. Wait for a Few Minutes:

• Leave the unit powered off for at least 5-10 minutes to allow the system to reset and discharge any residual power in the PCB.

1. Power the Unit Back On:

• Restore power via the switchboard and turn the unit back on using the remote or control panel.

If the error reappears, the PCB may need repair or replacement, or an external factor like electrical noise may need to be addressed. Please don’t hesitate to ‘contact us’ or give us a free call on 1300 730 896 so we can organise a technician to assist you in resolving the error if the issue persists.

A3 Error Code

Error Description:

The A3 error code on a Daikin air conditioning unit indicates a drain level control system abnormality. This issue originates from the indoor unit and is typically caused by drain clogging, an upward slope in the drain line, a defective drain pump, or a defective float switch or short circuit connector.

Need for a Technician:

Yes, resolving the A3 error often requires a trained HVAC technician, especially if the problem involves repairing or replacing the drain pump, float switch, or addressing structural drainage issues.

Remedies for Untrained End-Users:

Before contacting a technician, you can try these basic troubleshooting steps to determine if the issue is minor and can be resolved without tools:

1. Check for Drain Blockages:

• Inspect the drain pipe for visible clogs or kinks. Remove any obstructions, ensuring water can flow freely.

1. Power Down the Unit:

• Turn off the air conditioning unit using its remote or control panel.
• If the unit is connected via internal wall wiring, safely use your home’s switchboard to power down the circuit supplying electricity to the Daikin unit.

1. Wait and Restart:

• Leave the unit powered off for 5-10 minutes to allow the system to reset.
• Restore power via the switchboard and turn the unit back on using the remote or control panel.

1. Monitor for Recurrence:

• If the error does not return, the issue may have been resolved by clearing the blockage. If it reappears, professional service is necessary. Please don’t hesitate to ‘contact us’ or give us a free call on 1300 730 896 so we can organise a technician to assist you in resolving the error if the issue persists.

A4 Error Code

Error Description:

The A4 error code on a Daikin air conditioning unit indicates a malfunction of freezing protection, typically in systems that use water for heating or cooling. This issue can be caused by a shortage of water volume, low water temperature settings, or a defective water temperature thermistor. The problem originates from the indoor unit and is related to maintaining appropriate water flow and temperature to prevent freezing.

Need for a Technician:

Yes, resolving the A4 error usually requires a trained HVAC technician, especially if the issue involves diagnosing and replacing a defective thermistor or addressing water flow problems. Adjusting water temperature settings or repairing freezing protection components also requires professional expertise.

Remedies for Untrained End-Users:

Before contacting a technician, you can try these safe and straightforward steps:

1. Check Water Volume:

• If your unit uses a water-based system, ensure that the water supply is adequate and there are no leaks or blockages in the system.

1. Inspect for Freezing Conditions:

• If the surrounding environment is unusually cold, verify that the system’s water temperature settings are not too low.

1. Power Down the Unit:

• Turn off the air conditioning unit using its remote or control panel.
• If the unit is connected via internal wall wiring, safely use your home’s switchboard to power down the circuit supplying electricity to the Daikin unit.

1. Wait and Restart:

• Leave the unit powered off for 5-10 minutes to reset the system.
• Restore power via the switchboard and turn the unit back on using the remote or control panel.

If the error persists, the issue likely involves the thermistor or internal freezing protection mechanism, requiring professional servicing. Please don’t hesitate to ‘contact us’ or give us a free call on 1300 730 896 so we can organise a technician to assist you in resolving the error if the issue persists.

A5 Error Code

Error Description:

The A5 error code on a Daikin air conditioning unit indicates an issue with high-pressure control in heating mode or freeze-up protection control in cooling mode. This error originates from the indoor unit and is often caused by a clogged air filter, a short circuit in airflow, or a defective indoor unit heat exchanger thermistor.

Need for a Technician:

Yes, resolving the A5 error may require a trained HVAC technician, especially if the issue involves diagnosing and replacing the heat exchanger thermistor or addressing high-pressure system faults. However, basic maintenance tasks, such as cleaning air filters, can often be performed safely by the user.

Remedies for Untrained End-Users:

You can try the following simple and safe troubleshooting steps before contacting a technician:

1. Check and Clean the Air Filter:

• Turn off the air conditioner and carefully remove the air filter from the indoor unit.
• Inspect the filter for dust or debris. If it appears clogged, gently wash it with lukewarm water and let it dry completely before reinstalling.

1. Ensure Proper Airflow:

• Check for any obstructions near the indoor unit that might block airflow, such as furniture or curtains. Ensure adequate space around the unit for proper air circulation.

1. Power Down the Unit:

• Turn off the air conditioning unit using its remote or control panel.
• If the unit is connected via internal wall wiring, safely use your home’s switchboard to power down the circuit supplying electricity to the Daikin unit.

1. Restart the System:

• After waiting 5-10 minutes, restore power via the switchboard and turn the unit back on using the remote or control panel.

If the error persists, it may indicate a defective thermistor or internal high-pressure issue, requiring professional service. Please don’t hesitate to ‘contact us’ or give us a free call on 1300 730 896so we can organise a technician to assist you in resolving the error if the issue persists.

A6 Error Code

Error Description:

The A6 error code on a Daikin air conditioning unit indicates a malfunction of the fan motor in the indoor unit. This error can result from broken wires or a short circuit in the fan motor harness, a defective fan motor, or a defective indoor unit PCB.

Need for a Technician:

Yes, resolving the A6 error typically requires a trained HVAC technician. Diagnosing and repairing fan motor issues, such as replacing components or addressing wiring problems, involves electrical work that should not be attempted by untrained users.

Remedies for Untrained End-Users:

Before contacting a technician, you can try these basic steps to reset the system safely:

1. Inspect for Blockages:

• Ensure there are no visible obstructions or debris around the indoor unit’s fan. Blockages can sometimes lead to temporary fan motor errors.

1. Power Down the Unit:

• Turn off the air conditioning unit using its remote or control panel.
• If the unit is connected via internal wall wiring, safely use your home’s switchboard to power down the circuit supplying electricity to the Daikin unit.

1. Wait and Restart:

• Leave the system powered off for at least 5-10 minutes to allow the fan motor to reset.
• Restore power via the switchboard and turn the unit back on using the remote or control panel.

If the A6 error reappears, it likely indicates a deeper issue with the fan motor or PCB, necessitating professional servicing. Please don’t hesitate to ‘contact us’ or give us a free call on 1300 730 896 so we can organise a technician to assist you in resolving the error if the issue persists.

A7 Error Code

Error Description:

The A7 error code on a Daikin air conditioning unit indicates a malfunction of the swing flap motor in the indoor unit. This can be caused by a defective swing flap motor, defective indoor unit PCB, defective connection cable, or a defective airflow direction adjusting flap-cam.

Need for a Technician:

Yes, resolving the A7 error generally requires a trained HVAC technician. Diagnosing and repairing the swing flap motor or associated components involves specialised tools to test electrical connections, repair the motor, or replace defective parts.

Remedies for Untrained End-Users:

Before contacting a technician, you can try these basic troubleshooting steps to reset the system safely:

1. Inspect the Swing Flap:

• Check if the swing flap (the movable part that adjusts airflow direction) is obstructed by any visible debris or objects. If so, gently remove the obstruction to restore normal movement.

1. Power Down the Unit:

• Turn off the air conditioning unit using its remote or control panel.
• If the unit is connected via internal wall wiring, safely use your home’s switchboard to power down the circuit supplying electricity to the Daikin unit.

1. Restart the System:

• After waiting for 5-10 minutes, restore power via the switchboard.
• Turn the unit back on using the remote or control panel and observe if the error persists.

If the error reappears, it is likely due to a mechanical or electrical fault in the swing flap motor or PCB, requiring professional repair. Please don’t hesitate to ‘contact us’ or give us a free call on 1300 730 896 so we can organise a technician to assist you in resolving the error if the issue persists.

A8 Error Code

Error Description:

The A8 error code on a Daikin air conditioning unit indicates a malfunction of the power supply or AC input overcurrent in the system. This error typically originates from the indoor unit and can result from defective power supply voltage, faulty connections on the signal line, or defective wiring.

Need for a Technician:

Yes, resolving the A8 error generally requires a trained HVAC technician. Diagnosing the issue involves testing the electrical components, verifying power supply integrity, and checking for wiring or signal line faults, which are tasks that require specialised tools and expertise to perform safely.

Remedies for Untrained End-Users:

Although the root cause of the issue needs professional attention, you can try the following basic steps to rule out minor power-related problems:

1. Power Down the Unit:

• Turn off the air conditioning unit using its remote or control panel.
• If the unit is connected via internal wall wiring, safely use your home’s switchboard to power down the circuit supplying electricity to the Daikin unit.

1. Check the Power Source:

• Ensure the power supply to the unit is stable and not interrupted. Verify that the circuit breaker has not tripped or that there are no power outages in your area.

1. Restart the System:

• After waiting for 5-10 minutes, restore power via the switchboard and turn the unit back on using the remote or control panel.

If the error reappears, it indicates a deeper issue with the power supply, wiring, or signal line that requires professional repair. Please don’t hesitate to ‘contact us’ or give us a free call on 1300 730 896 so we can organise a technician to assist you in resolving the error if the issue persists.

A9 Error Code

Error Description:

The A9 error code on a Daikin air conditioning unit indicates a malfunction of the electronic expansion valve in the indoor unit. This issue may stem from a defective electronic expansion valve coil, a faulty indoor unit PCB, or defective relay cables.

Need for a Technician:

Yes, resolving the A9 error requires a trained HVAC technician. The diagnosis and repair involve inspecting and potentially replacing the electronic expansion valve or its components, which requires specialised tools to handle the unit’s internal mechanisms and electrical systems safely.

Remedies for Untrained End-Users:

While the A9 error typically requires professional intervention, you can try the following simple steps to reset the system safely before contacting a technician:

1. Power Down the Unit:

• Turn off the air conditioning unit using its remote or control panel.
• If the unit is connected via internal wall wiring, safely use your home’s switchboard to power down the circuit supplying electricity to the Daikin unit.

1. Wait and Restart:

• Leave the unit powered off for 5-10 minutes to allow the system to reset.
• Restore power via the switchboard and turn the unit back on using the remote or control panel.

1. Check for Persistent Errors:

• If the error persists after restarting, the issue is likely internal and requires professional servicing, in which case, please don’t hesitate to ‘contact us’ or give us a free call on 1300 730 896 so we can organise a technician to assist you in resolving the error if the issue persists.

AA Error Code

Error Description:

The AA error code on a Daikin air conditioning unit indicates a heater overheat issue in the indoor unit. This error occurs when the safety mechanism, such as the 26WH (overheat protection), is activated to prevent damage to the system due to excessive heating.

Need for a Technician:

Yes, resolving the AA error typically requires a trained HVAC technician. The issue involves diagnosing the heater’s overheat condition, which could be caused by a malfunctioning heater element, inadequate airflow, or a defect in the thermostat or safety circuitry. These tasks require professional tools and expertise.

Remedies for Untrained End-Users:

While a professional technician is often needed to address the root cause, you can try these safe steps before scheduling a service call:

1. Ensure Adequate Airflow:

• Check that vents and filters are clean and unobstructed to ensure proper airflow around the unit.

1. Power Down the Unit:

• Turn off the air conditioning unit using its remote or control panel.
• If the unit is connected via internal wall wiring, safely use your home’s switchboard to power down the circuit supplying electricity to the Daikin unit.

1. Wait and Restart:

• Leave the system powered off for 5-10 minutes to allow it to cool down and reset.
• Restore power via the switchboard and turn the unit back on using the remote or control panel.

If the error persists, it indicates that the heater or overheat protection system requires professional servicing. Please don’t hesitate to ‘contact us’ or give us a free call on 1300 730 896 so we can organise a technician to assist you in resolving the error if the issue persists.

AF Error Code

Error Description:

The AF error code on a Daikin air conditioning unit indicates a malfunction of the humidifier system, typically linked to an optional humidifier accessory. This issue may arise from a leaking humidifier unit, defective drain piping, or a faulty indoor unit PCB.

Need for a Technician:

Yes, resolving the AF error often requires a trained HVAC technician. The technician will need to inspect and repair the humidifier system, including checking for leaks, ensuring proper drainage, and diagnosing any faults in the PCB or associated components.

Remedies for Untrained End-Users:

If the AF error appears, you can try the following steps to address minor issues safely:

1. Inspect for Leaks:

• Check around the humidifier and indoor unit for visible water leaks or pooling. If a leak is present, it might indicate clogged or misaligned drain piping.

1. Power Down the Unit:

• Turn off the air conditioning unit using its remote or control panel.
• If the unit is connected via internal wall wiring, safely use your home’s switchboard to power down the circuit supplying electricity to the Daikin unit.

1. Restart the System:

• Wait 5-10 minutes to allow the system to reset, then restore power via the switchboard and turn the unit back on using the remote or control panel.

1. Check Drainage:

• If the humidifier is accessible, ensure the drain line is not kinked or obstructed, and confirm it slopes downward for proper water flow.

If the error persists or if water leaks continue, professional service is necessary to address the underlying cause. Please don’t hesitate to ‘contact us’ or give us a free call on 1300 730 896 so we can organise a technician to assist you in resolving the error if the issue persists.

AH Error Code

Error Description:

The AH error code on a Daikin air conditioning unit indicates a malfunction in the dust collector of the air cleaner. This issue typically originates from the indoor unit and can result from a defective dust-collecting element, a stained insulator, a faulty high-voltage power supply unit, or a defective indoor unit PCB.

Need for a Technician:

Yes, resolving the AH error usually requires a trained HVAC technician. The issue involves diagnosing and repairing components of the dust collection system, such as the high-voltage power supply or PCB, which require specialised tools and expertise to handle safely.

Remedies for Untrained End-Users:

If the AH error occurs, you can try these safe and simple steps before calling a technician:

1. Check and Clean the Dust Collector:

• Turn off the unit and inspect the dust-collecting elements for dirt or stains. Clean them gently with a soft brush or cloth if recommended by the user manual. Avoid using water unless specified by the manufacturer.

1. Inspect the Insulator:

• If accessible, check for visible dirt or stains on the insulator parts of the dust collector. Clean carefully if permitted in the manual.

1. Power Down the Unit:

• Turn off the air conditioning unit using its remote or control panel.
• If the unit is connected via internal wall wiring, safely use your home’s switchboard to power down the circuit supplying electricity to the Daikin unit.

1. Restart the System:

• Wait 5-10 minutes for the system to reset. Restore power via the switchboard and turn the unit back on using the remote or control panel.

If the error persists, the high-voltage power supply or indoor PCB might be defective, requiring professional servicing. Please don’t hesitate to ‘contact us’ or give us a free call on 1300 730 896 so we can organise a technician to assist you in resolving the error if the issue persists.

AJ Error Code

Error Description:

The AJ error code on a Daikin air conditioning unit indicates a malfunction related to the capacity setting of the indoor unit PCB (Printed Circuit Board). This error typically occurs if the capacity setting adaptor was not installed correctly or omitted during a PCB replacement. It originates from the indoor unit.

Need for a Technician:

Yes, resolving the AJ error requires a trained HVAC technician. The issue involves verifying the correct installation or replacement of the capacity setting adaptor and ensuring compatibility with the indoor unit PCB. This process requires technical expertise to avoid further damage to the system.

Remedies for Untrained End-Users:

While the underlying issue requires professional attention, you can try the following safe steps to reset the system before contacting a technician:

1. Power Down the Unit:

• Turn off the air conditioning unit using its remote or control panel.
• If the unit is connected via internal wall wiring, safely use your home’s switchboard to power down the circuit supplying electricity to the Daikin unit.

1. Wait and Restart:

• Leave the unit powered off for 5-10 minutes to allow the system to reset.
• Restore power via the switchboard and turn the unit back on using the remote or control panel.

If the error persists, it indicates a deeper issue with the capacity settings or the PCB itself, necessitating professional service. Please don’t hesitate to ‘contact us’ or give us a free call on 1300 730 896 so we can organise a technician to assist you in resolving the error if the issue persists.

C1 Error Code

Error Description:

The C1 error code on a Daikin air conditioning unit indicates a failure in communication between the indoor unit PCB (Printed Circuit Board) and the sub-PCB. This issue may result from a defective connection in the connector between these PCBs or a fault in the communication wiring. The problem originates from the indoor unit.

Need for a Technician:

Yes, resolving the C1 error typically requires a trained HVAC technician. The technician will need to inspect and test the connectors, sub-PCB, and indoor unit PCB for proper communication, which involves specialised tools and a technical understanding of the system’s circuitry.

Remedies for Untrained End-Users:

While a technician is usually required to resolve the root cause, you can try these simple steps to reset the system and rule out a temporary connection glitch:

1. Power Down the Unit:

• Turn off the air conditioning unit using its remote or control panel.
• If the unit is connected via internal wall wiring, safely use your home’s switchboard to power down the circuit supplying electricity to the Daikin unit.

1. Inspect Visible Connections:

• If accessible without tools, check for any visible loose or disconnected cables near the indoor unit. Do not attempt to open the unit or access internal components.

1. Wait and Restart:

• Leave the system powered off for 5-10 minutes to reset any temporary issues in communication.
• Restore power via the switchboard and turn the unit back on using the remote or control panel.

If the error persists, professional service is necessary to diagnose and repair the defective connectors or PCBs. Please don’t hesitate to ‘contact us’ or give us a free call on 1300 730 896 so we can organise a technician to assist you in resolving the error if the issue persists.

C4 Error Code

Error Description:

The C4 error code on a Daikin air conditioning unit indicates a malfunction of the liquid pipe thermistor for the heat exchanger, located in the indoor unit. This issue can be caused by a defective liquid pipe thermistor, faulty indoor unit PCB, or poor contact in the thermistor connector.

Need for a Technician:

Yes, resolving the C4 error typically requires a trained HVAC technician. Diagnosing the issue involves testing the thermistor’s resistance, inspecting the wiring, and verifying the functionality of the indoor unit PCB—tasks requiring specialised tools and technical expertise.

Remedies for Untrained End-Users:

If the error occurs, you can try these safe and simple steps to rule out temporary faults before calling a technician:

1. Power Down the Unit:

• Turn off the air conditioning unit using its remote or control panel.
• If the unit is connected via internal wall wiring, safely use your home’s switchboard to power down the circuit supplying electricity to the Daikin unit.

1. Wait and Restart:

• Leave the system powered off for 5-10 minutes to allow it to reset.
• Restore power via the switchboard and turn the unit back on using the remote or control panel.

1. Inspect the Environment:

• Ensure the area around the indoor unit is clean and free of excessive dust or debris, which could interfere with normal thermistor function. However, do not attempt to access internal components.

If the error persists, the liquid pipe thermistor or its connection likely needs repair or replacement, requiring professional servicing. Please don’t hesitate to ‘contact us’ or give us a free call on 1300 730 896 so we can organise a technician to assist you in resolving the error if the issue persists.

C5 Error Code

Error Description:

The C5 error code on a Daikin air conditioning unit indicates a malfunction of the gas pipe thermistor for the heat exchanger in the indoor unit. This issue may result from a defective gas pipe thermistor, faulty indoor unit PCB, or poor contact in the thermistor connector.

Need for a Technician:

Yes, resolving the C5 error typically requires a trained HVAC technician. Diagnosing the issue involves testing the thermistor’s resistance, verifying the connections, and ensuring the indoor unit PCB is functioning correctly. These tasks require specialised tools and expertise.

Remedies for Untrained End-Users:

While the root cause usually requires professional intervention, you can try these basic troubleshooting steps to rule out temporary issues:

1. Power Down the Unit:

• Turn off the air conditioning unit using its remote or control panel.
• If the unit is connected via internal wall wiring, safely use your home’s switchboard to power down the circuit supplying electricity to the Daikin unit.

1. Wait and Restart:

• Leave the unit powered off for 5-10 minutes to allow it to reset.
• Restore power via the switchboard and turn the unit back on using the remote or control panel.

1. Inspect for Visible Issues:

• Check for any external obstructions or visible damage near the indoor unit. Do not open the unit or access internal components.

If the error persists, it indicates that the gas pipe thermistor or its connection may need repair or replacement, requiring professional servicing. Please don’t hesitate to ‘contact us’ or give us a free call on 1300 730 896 so we can organise a technician to assist you in resolving the error if the issue persists.

C6 Error Code

Error Description:

The C6 error code on a Daikin air conditioning unit indicates a malfunction of the fan motor sensor or fan control driver. This issue originates from the indoor unit and can result from a defective fan PCB, a faulty connection of the capacity setting adaptor, or a field setting error.

Need for a Technician:

Yes, resolving the C6 error typically requires a trained HVAC technician. The technician will need to inspect the fan motor, its sensor, and the fan PCB, as well as verify the accuracy of the capacity settings. These tasks involve specialised tools and expertise in HVAC systems.

Remedies for Untrained End-Users:

While the root cause generally requires professional servicing, you can try these safe steps to reset the system and rule out temporary faults:

1. Power Down the Unit:

• Turn off the air conditioning unit using its remote or control panel.
• If the unit is connected via internal wall wiring, safely use your home’s switchboard to power down the circuit supplying electricity to the Daikin unit.

1. Wait and Restart:

• Leave the unit powered off for 5-10 minutes to allow it to reset.
• Restore power via the switchboard and turn the unit back on using the remote or control panel.

1. Inspect for Obstructions:

• Check for any external obstructions or debris around the fan area of the indoor unit. If found, remove them gently without opening the unit or accessing internal components.

If the error reappears, the issue is likely related to the fan motor sensor, fan PCB, or field settings, necessitating professional servicing. Please don’t hesitate to ‘contact us’ or give us a free call on 1300 730 896 so we can organise a technician to assist you in resolving the error if the issue persists.

C7 Error Code

Error Description:

The C7 error code on a Daikin air conditioning unit indicates a fault with the front panel driving motor in the indoor unit. This issue can result from a defective front panel driving motor, a faulty limit switch, or a disruption in the motor’s operation.

Need for a Technician:

Yes, resolving the C7 error typically requires a trained HVAC technician. The technician will need to inspect the front panel driving motor and limit switch to identify and resolve any mechanical or electrical faults. This involves testing components and possibly replacing defective parts, requiring specialised tools and expertise.

Remedies for Untrained End-Users:

While a professional is usually required to address the root cause, you can try these simple steps to reset the system and potentially resolve minor issues:

1. Power Down the Unit:

• Turn off the air conditioning unit using its remote or control panel.
• If the unit is connected via internal wall wiring, safely use your home’s switchboard to power down the circuit supplying electricity to the Daikin unit.

1. Inspect the Front Panel:

• Ensure there are no visible obstructions or debris around the front panel that might block its movement. Gently remove any such obstructions.

1. Wait and Restart:

• Leave the unit powered off for 5-10 minutes to allow the system to reset.
• Restore power via the switchboard and turn the unit back on using the remote or control panel.

If the error reappears, the issue is likely related to a defective motor or limit switch, which requires professional servicing. Please don’t hesitate to ‘contact us’ or give us a free call on 1300 730 896 so we can organise a technician to assist you in resolving the error if the issue persists.

C9 Error Code

Error Description:

The C9 error code on a Daikin air conditioning unit indicates a malfunction of the suction air thermistor in the indoor unit. This issue may arise due to a defective suction air thermistor, a faulty indoor unit PCB, or a poor connection in the thermistor’s connector contact.

Need for a Technician:

Yes, resolving the C9 error generally requires a trained HVAC technician. Diagnosing the problem involves testing the thermistor for accurate resistance readings, inspecting the connections, and verifying the indoor unit PCB’s functionality. These tasks require specialised tools and technical expertise to ensure proper repairs.

Remedies for Untrained End-Users:

Before contacting a technician, you can try the following safe steps to reset the system and rule out minor issues:

1. Power Down the Unit:

• Turn off the air conditioning unit using its remote or control panel.
• If the unit is connected via internal wall wiring, safely use your home’s switchboard to power down the circuit supplying electricity to the Daikin unit.

1. Wait and Restart:

• Leave the system powered off for 5-10 minutes to allow it to reset.
• Restore power via the switchboard and turn the unit back on using the remote or control panel.

1. Inspect for External Issues:

• Ensure that the air intake area near the indoor unit is clear of dust or obstructions. Avoid attempting to access internal components.

If the error persists, it likely indicates a faulty thermistor or related connection that requires professional servicing. Please don’t hesitate to ‘contact us’ or give us a free call on 1300 730 896 so we can organise a technician to assist you in resolving the error if the issue persists.

CA Error Code

Error Description:

The CA error code on a Daikin air conditioning unit indicates a malfunction of the discharge air thermistor in the indoor unit. This issue can result from a defective discharge air thermistor, a faulty indoor unit PCB, or poor connector contact within the thermistor circuit.

Need for a Technician:

Yes, resolving the CA error typically requires a trained HVAC technician. The technician will need to test the discharge air thermistor for accurate resistance readings, inspect the connectors for proper contact, and ensure the indoor unit PCB is functioning correctly. These procedures require specialised tools and expertise to perform safely and effectively.

Remedies for Untrained End-Users:

While the root cause generally requires professional servicing, you can attempt the following safe steps to reset the system and address minor, non-intrusive issues:

1. Power Down the Unit:

• Turn off the air conditioning unit using its remote or control panel.
• If the unit is connected via internal wall wiring, safely use your home’s switchboard to power down the circuit supplying electricity to the Daikin unit.

1. Wait and Restart:

• Leave the system powered off for 5-10 minutes to allow it to reset.
• Restore power via the switchboard and turn the unit back on using the remote or control panel.

1. Inspect for External Blockages:

• Ensure the discharge area is not obstructed by dust, debris, or other objects that might impede airflow. Avoid opening the unit or attempting to access internal components.

If the error reappears, it indicates a deeper issue with the thermistor or its connections, which requires professional repair. Please don’t hesitate to ‘contact us’ or give us a free call on 1300 730 896 so we can organise a technician to assist you in resolving the error if the issue persists.

CC Error Code

Error Description:

The CC error code on a Daikin air conditioning unit indicates a malfunction in the humidity sensor system in the indoor unit. This issue may result from a defective humidity sensor or poor connector contact within the sensor system.

Need for a Technician:

Yes, resolving the CC error typically requires a trained HVAC technician. The technician will need to inspect and test the humidity sensor to confirm it is functioning correctly and ensure proper connectivity in the sensor’s wiring and connectors. This process requires technical expertise and specialised tools to diagnose and repair accurately.

Remedies for Untrained End-Users:

While the root cause often requires professional servicing, you can try the following safe steps to reset the system and rule out temporary issues:

1. Power Down the Unit:

• Turn off the air conditioning unit using its remote or control panel.
• If the unit is connected via internal wall wiring, safely use your home’s switchboard to power down the circuit supplying electricity to the Daikin unit.

1. Wait and Restart:

• Leave the system powered off for 5-10 minutes to allow it to reset.
• Restore power via the switchboard and turn the unit back on using the remote or control panel.

1. Inspect for Environmental Factors:

• Ensure there are no external factors such as excessive moisture, dust, or obstructions around the unit that might interfere with the sensor’s operation. Do not attempt to open the unit or access internal components.

If the error persists, the humidity sensor or its connections likely require professional repair or replacement. Please don’t hesitate to ‘contact us’ or give us a free call on 1300 730 896 so we can organise a technician to assist you in resolving the error if the issue persists.

CJ Error Code

Error Description:

The CJ error code on a Daikin air conditioning unit indicates an abnormality in the room temperature thermistor located in the remote controller. This issue can result from a defective room temperature thermistor, a faulty remote controller PCB, or external factors such as electrical noise interference.

Need for a Technician:

Yes, resolving the CJ error typically requires a trained HVAC technician. Diagnosing the problem involves testing the remote controller’s thermistor for accurate temperature readings, inspecting the PCB for faults, and addressing potential sources of electrical interference. These tasks require technical expertise and specialised tools.

Remedies for Untrained End-Users:

Before contacting a technician, you can try these simple steps to reset the system and address minor, non-intrusive issues:

1. Power Down the Unit:

• Turn off the air conditioning unit using its remote or control panel.
• If the unit is connected via internal wall wiring, safely use your home’s switchboard to power down the circuit supplying electricity to the Daikin unit.

1. Check the Remote Controller:

• Ensure the remote controller is free from dust, moisture, or damage. Replace the batteries if they are low to rule out power supply issues.

1. Wait and Restart:

• Leave the system powered off for 5-10 minutes to reset any temporary faults.
• Restore power via the switchboard and turn the unit back on using the remote or control panel.

1. Avoid Sources of Electrical Noise:

• Ensure the remote controller is not placed near devices that emit strong electromagnetic signals, such as microwaves or routers, as these can interfere with the thermistor’s functionality.

If the error persists, the issue is likely related to a defective thermistor or remote controller PCB, requiring professional servicing. Please don’t hesitate to ‘contact us’ or give us a free call on 1300 730 896 so we can organise a technician to assist you in resolving the error if the issue persists.

E0 Error Code

Error Description:

The E0 error code on a Daikin air conditioning unit indicates that unified protection devices have been activated. This error originates from the outdoor unit and can occur due to a protection device connected to the outdoor unit PCB being triggered or defective connector contact in the protection device wiring.

Need for a Technician:

Yes, resolving the E0 error typically requires a trained HVAC technician. The technician will need to test the protection device, verify the wiring and connectors, and ensure the outdoor unit PCB is functioning properly. These tasks involve electrical diagnostics and specialised tools to ensure accurate repair and safety.

Remedies for Untrained End-Users:

While the underlying issue often requires professional servicing, you can try these safe steps to reset the system and rule out temporary issues:

1. Power Down the Unit:

• Turn off the air conditioning unit using its remote or control panel.
• If the unit is connected via internal wall wiring, safely use your home’s switchboard to power down the circuit supplying electricity to the Daikin unit.

1. Wait and Restart:

• Leave the system powered off for 5-10 minutes to allow it to reset.
• Restore power via the switchboard and turn the unit back on using the remote or control panel.

1. Inspect for Environmental Factors:

• Ensure the outdoor unit is clear of debris, excessive dirt, or obstructions that could cause overheating or stress to the protection devices. Do not attempt to access internal components.

If the error persists, it indicates a deeper issue with the protection device, its connectors, or the outdoor PCB, requiring professional servicing. Please don’t hesitate to ‘contact us’ or give us a free call on 1300 730 896 so we can organise a technician to assist you in resolving the error if the issue persists.

E1 Error Code

Error Description:

The E1 error code on a Daikin air conditioning unit indicates a malfunction in the outdoor unit PCB (Printed Circuit Board). This issue can result from a defective outdoor unit PCB or faulty connections in the relay wires between the indoor and outdoor units.

Need for a Technician:

Yes, resolving the E1 error typically requires a trained HVAC technician. Diagnosing this issue involves inspecting the outdoor unit PCB for damage or malfunctions, verifying the integrity of relay wiring, and ensuring secure and proper connections between components. These tasks require technical expertise and specialised tools.

Remedies for Untrained End-Users:

While professional servicing is usually required, you can try these safe steps to rule out minor issues before contacting a technician:

1. Power Down the Unit:

• Turn off the air conditioning unit using its remote or control panel.
• If the unit is connected via internal wall wiring, safely use your home’s switchboard to power down the circuit supplying electricity to the Daikin unit.

1. Wait and Restart:

• Leave the system powered off for 5-10 minutes to reset the PCB.
• Restore power via the switchboard and turn the unit back on using the remote or control panel.

1. Inspect for External Factors:

• Ensure that the outdoor unit is free from obstructions, debris, or excessive moisture that might contribute to electrical issues. Avoid attempting to open or access internal components.

If the error persists, it is likely due to a fault in the outdoor PCB or relay connections, requiring professional attention. Please don’t hesitate to ‘contact us’ or give us a free call on 1300 730 896 so we can organise a technician to assist you in resolving the error if the issue persists.

E3 Error Code

Error Description:

The E3 error code on a Daikin air conditioning unit indicates the actuation of the high-pressure switch (HPS) in the outdoor unit. This issue can be caused by a dirty outdoor unit heat exchanger, clogged refrigerant piping, a defective high-pressure switch, or faulty connector contacts.

Need for a Technician:

Yes, resolving the E3 error typically requires a trained HVAC technician. Diagnosing this issue involves checking the refrigerant pressure, inspecting the high-pressure switch and connectors, and ensuring the outdoor heat exchanger is clean and functioning correctly. These tasks require specialised tools and technical knowledge of the system.

Remedies for Untrained End-Users:

While professional servicing is often necessary, you can perform these safe and straightforward steps to address minor external issues before contacting a technician:

1. Inspect the Outdoor Unit:

• Check for visible dirt, debris, or obstructions around the outdoor heat exchanger or vents. If dirty, gently clean the exterior fins using a soft brush or a vacuum. Avoid using water unless directed by the manufacturer.

1. Ensure Adequate Airflow:

• Confirm that there is enough clearance (usually at least 50 cm) around the outdoor unit for proper airflow. Remove any objects that may block the unit.

1. Power Down the Unit:

• Turn off the air conditioning unit using its remote or control panel.
• If the unit is connected via internal wall wiring, safely use your home’s switchboard to power down the circuit supplying electricity to the Daikin unit.

1. Wait and Restart:

• Leave the system powered off for 5-10 minutes to allow it to reset.
• Restore power via the switchboard and turn the unit back on using the remote or control panel.

If the error persists, it is likely due to an internal issue with the high-pressure switch, refrigerant piping, or connections, requiring professional servicing. Please don’t hesitate to ‘contact us’ or give us a free call on 1300 730 896 so we can organise a technician to assist you in resolving the error if the issue persists.

E4 Error Code

Error Description:

The E4 error code on a Daikin air conditioning unit indicates the actuation of the low-pressure switch (LPS) in the outdoor unit. This issue may result from an abnormal drop in refrigerant pressure, a defective low-pressure sensor, a faulty outdoor unit PCB, or poor connector contact.

Need for a Technician:

Yes, resolving the E4 error typically requires a trained HVAC technician. Diagnosing this issue involves checking the refrigerant levels, testing the low-pressure switch and sensor for proper operation, and inspecting the outdoor unit PCB and wiring connections. These tasks require technical expertise and specialised tools to ensure the system operates safely and efficiently.

Remedies for Untrained End-Users:

While a professional is usually required to resolve the root cause, you can try these safe and simple steps to rule out minor external factors before contacting a technician:

1. Inspect the Outdoor Unit:

• Check for visible obstructions, dirt, or debris around the outdoor unit that could affect airflow or refrigerant pressure. Clear any obstructions gently without opening the unit.

1. Ensure Proper Temperature Conditions:

• Confirm that the outdoor unit is not operating in extremely low temperatures, as this may temporarily trigger a low-pressure error.

1. Power Down the Unit:

• Turn off the air conditioning unit using its remote or control panel.
• If the unit is connected via internal wall wiring, safely use your home’s switchboard to power down the circuit supplying electricity to the Daikin unit.

1. Wait and Restart:

• Leave the system powered off for 5-10 minutes to allow it to reset.
• Restore power via the switchboard and turn the unit back on using the remote or control panel.

If the error persists, it indicates a likely fault in the refrigerant system, low-pressure switch, or PCB that requires professional servicing. Please don’t hesitate to ‘contact us’ or give us a free call on 1300 730 896 so we can organise a technician to assist you in resolving the error if the issue persists.

E5 Error Code

Error Description:

The E5 error code on a Daikin air conditioning unit indicates an issue with the inverter compressor motor, typically related to overheating, a compressor lock, or high differential pressure. This error originates from the outdoor unit and can also result from a defective inverter PCB, a UVW connection error, or poor connector contact.

Need for a Technician:

Yes, resolving the E5 error requires a trained HVAC technician. The technician will need to diagnose the inverter compressor for mechanical or electrical faults, inspect the inverter PCB for defects, and verify proper UVW wiring connections. These tasks require specialised tools and expertise to ensure safe and effective repairs

Remedies for Untrained End-Users:

Before contacting a technician, you can try the following steps to rule out minor or temporary issues safely:

1. Inspect the Outdoor Unit:

• Ensure the outdoor unit has adequate airflow and is free from obstructions such as dirt, debris, or overgrown vegetation.

1. Avoid Overloading the System:

• If the system has been running at maximum capacity for an extended period, turn it off and allow it to cool down.

1. Power Down the Unit:

• Turn off the air conditioning unit using its remote or control panel.
• If the unit is connected via internal wall wiring, safely use your home’s switchboard to power down the circuit supplying electricity to the Daikin unit.

1. Wait and Restart:

• Leave the system powered off for 10-15 minutes to allow it to reset.
• Restore power via the switchboard and turn the unit back on using the remote or control panel.

If the error persists, it likely indicates an issue with the inverter compressor motor, PCB, or wiring that requires professional attention. Please don’t hesitate to ‘contact us’ or give us a free call on 1300 730 896 so we can organise a technician to assist you in resolving the error if the issue persists.

E6 Error Code

Error Description:

The E6 error code on a Daikin air conditioning unit indicates an overcurrent or lock in the standard (STD) compressor motor, often originating from the outdoor unit. This issue can result from a defective compressor, a faulty control PCB, or a closed stop valve restricting refrigerant flow.

Need for a Technician:

Yes, resolving the E6 error requires a trained HVAC technician. Diagnosing this issue involves testing the compressor motor for overcurrent or mechanical lock, inspecting the control PCB for faults, and ensuring the stop valve is properly opened. These tasks require specialised tools and knowledge to ensure safe and precise repairs.

Remedies for Untrained End-Users:

While professional intervention is usually necessary, you can try these safe steps to address minor issues before calling a technician:

1. Inspect the Outdoor Unit:

• Check the outdoor unit for visible obstructions or debris that could interfere with normal airflow. Clear any blockages carefully without opening the unit.

1. Check the Stop Valve:

• If accessible, ensure the stop valve on the outdoor unit is fully open. If it is closed or partially closed, consult a technician to adjust it properly.

1. Power Down the Unit:

• Turn off the air conditioning unit using its remote or control panel.
• If the unit is connected via internal wall wiring, safely use your home’s switchboard to power down the circuit supplying electricity to the Daikin unit.

1. Wait and Restart:

• Leave the system powered off for 10-15 minutes to allow it to reset.
• Restore power via the switchboard and turn the unit back on using the remote or control panel.

If the error persists, it likely indicates a fault in the compressor, control PCB, or refrigerant system that requires professional attention.

Closing Statement:

Please don’t hesitate to ‘contact us’ or give us a free call on 1300 730 896 so we can organise a technician to assist you in resolving the error if the issue persists.

E7 Error Code

Error Description:

The E7 error code on a Daikin air conditioning unit indicates a malfunction in the outdoor unit fan motor system. This issue can be caused by a fan motor failure, a disconnected or defective harness/connector between the fan motor and the PCB, or foreign objects obstructing the fan’s rotation.

Need for a Technician:

Yes, resolving the E7 error generally requires a trained HVAC technician. The technician will need to inspect the fan motor for mechanical or electrical faults, verify the integrity of the harness and connectors, and ensure the PCB is communicating effectively with the fan motor. These diagnostics require specialised tools and expertise.

Remedies for Untrained End-Users:

Before contacting a technician, you can try these safe and simple steps to rule out minor external issues:

1. Inspect the Outdoor Unit:

• Look for visible debris or foreign objects near the outdoor unit fan. If debris is present, carefully remove it to ensure the fan blades can rotate freely.

1. Check for Blocked Airflow:

• Ensure there is adequate clearance (at least 50 cm) around the outdoor unit and that no obstacles are blocking airflow.

1. Power Down the Unit:

• Turn off the air conditioning unit using its remote or control panel.
• If the unit is connected via internal wall wiring, safely use your home’s switchboard to power down the circuit supplying electricity to the Daikin unit.

1. Wait and Restart:

• Leave the system powered off for 10-15 minutes to allow it to reset.
• Restore power via the switchboard and turn the unit back on using the remote or control panel.

If the error persists, it indicates a likely issue with the fan motor, connectors, or PCB, which requires professional repair or replacement. Please don’t hesitate to ‘contact us’ or give us a free call on 1300 730 896 so we can organise a technician to assist you in resolving the error if the issue persists.

E8 Error Code

Error Description:

The E8 error code on a Daikin air conditioning unit indicates an overcurrent in the inverter compressor, typically originating from the outdoor unit. This issue can be caused by a defective compressor, a faulty inverter main circuit capacitor, a defective outdoor unit PCB, or a faulty power transistor.

Need for a Technician:

Yes, resolving the E8 error requires a trained HVAC technician. The technician will need to test the inverter compressor for overcurrent issues, inspect the outdoor unit PCB and power transistor, and verify the integrity of the main circuit capacitor. These tasks require specialised diagnostic tools and technical expertise.

Remedies for Untrained End-Users:

While the root cause often requires professional attention, you can try the following safe steps to rule out minor or temporary issues:

1. Inspect the Outdoor Unit:

• Check the outdoor unit for visible obstructions, debris, or excessive dust that might cause the compressor to overwork. Carefully remove any obstructions to ensure proper ventilation.

1. Avoid Overloading the System:

• Reduce the system’s load by setting the temperature closer to the ambient level or operating in a moderate mode if the system has been running at maximum capacity.

1. Power Down the Unit:

• Turn off the air conditioning unit using its remote or control panel.
• If the unit is connected via internal wall wiring, safely use your home’s switchboard to power down the circuit supplying electricity to the Daikin unit.

1. Wait and Restart:

• Leave the system powered off for 10-15 minutes to allow it to reset.
• Restore power via the switchboard and turn the unit back on using the remote or control panel.

If the error persists, it likely indicates a serious issue with the inverter compressor, PCB, or power components that requires professional servicing. Please don’t hesitate to ‘contact us’ or give us a free call on 1300 730 896 so we can organise a technician to assist you in resolving the error if the issue persists.

E9 Error Code

Error Description:

The E9 error code on a Daikin air conditioning unit indicates a malfunction of the electronic expansion valve coil, which is typically part of the outdoor unit. This issue can result from a disconnection of connectors from the electronic expansion valve, a defective electronic expansion valve coil, or a faulty outdoor unit control PCB.

Need for a Technician:

Yes, resolving the E9 error requires a trained HVAC technician. Diagnosing this issue involves testing the electronic expansion valve for electrical and mechanical faults, verifying the connection integrity of the valve’s wiring and connectors, and ensuring the outdoor unit control PCB is functioning properly. These tasks demand specialised tools and technical knowledge.

Remedies for Untrained End-Users:

While professional servicing is usually required, you can try these simple steps to address minor external issues safely before contacting a technician:

1. Inspect the Outdoor Unit:

• Ensure the outdoor unit is clean and free of debris or obstructions that might interfere with its operation. However, do not attempt to open the unit or access the electronic expansion valve.

1. Check for Proper Ventilation:

• Confirm there is sufficient clearance around the outdoor unit for adequate airflow. Remove any nearby objects that may obstruct airflow.

1. Power Down the Unit:

• Turn off the air conditioning unit using its remote or control panel.
• If the unit is connected via internal wall wiring, safely use your home’s switchboard to power down the circuit supplying electricity to the Daikin unit.

1. Wait and Restart:

• Leave the system powered off for 10-15 minutes to allow it to reset.
• Restore power via the switchboard and turn the unit back on using the remote or control panel.

If the error persists, it is likely due to a fault in the expansion valve coil, its connections, or the control PCB, requiring professional servicing. Please don’t hesitate to ‘contact us’ or give us a free call on 1300 730 896 so we can organise a technician to assist you in resolving the error if the issue persists.

EA Error Code

Error Description:

The EA error code on a Daikin air conditioning unit indicates a malfunction in the four-way valve or cool/heat switching system, typically originating from the outdoor unit. This issue can result from a defective four-way valve, refrigerant (gas) shortage, a faulty outdoor unit PCB, or a defective thermistor.

Need for a Technician:

Yes, resolving the EA error requires a trained HVAC technician. Diagnosing this issue involves testing the four-way valve for mechanical or electrical faults, checking refrigerant levels for potential shortages, and verifying the functionality of the outdoor PCB and thermistor. These tasks require specialised tools and expertise to ensure accurate diagnosis and safe repairs.

Remedies for Untrained End-Users:

While the root cause typically requires professional servicing, you can try the following steps to address external factors or temporary issues safely:

1. Inspect the Outdoor Unit:

• Ensure the outdoor unit is free from debris, obstructions, or excessive dirt that might hinder its operation. Clean the exterior gently if needed, but do not attempt to open the unit.

1. Check System Mode:

• Confirm that the system is operating in the correct mode (cooling or heating) as per your requirements. If incorrectly set, adjust it using the remote or control panel.

1. Power Down the Unit:

• Turn off the air conditioning unit using its remote or control panel.
• If the unit is connected via internal wall wiring, safely use your home’s switchboard to power down the circuit supplying electricity to the Daikin unit.

1. Wait and Restart:

• Leave the system powered off for 10-15 minutes to allow it to reset.
• Restore power via the switchboard and turn the unit back on using the remote or control panel.

If the error persists, it is likely due to a mechanical issue with the four-way valve, refrigerant shortage, or a defective component, requiring professional repair. Please don’t hesitate to ‘contact us’ or give us a free call on 1300 730 896 so we can organise a technician to assist you in resolving the error if the issue persists.

EC Error Code

Error Description:

The EC error code on a Daikin air conditioning unit indicates a malfunction related to the entering water temperature, which may involve an abnormal cooling water temperature. This issue typically originates from the outdoor unit and may result from a defective thermistor or a faulty outdoor unit PCB.

Need for a Technician:

Yes, resolving the EC error requires a trained HVAC technician. Diagnosing this issue involves testing the entering water thermistor for accurate temperature readings, verifying the cooling water system’s functionality, and inspecting the outdoor unit PCB for potential faults. These tasks demand technical expertise and specialised equipment.

Remedies for Untrained End-Users:

Before contacting a technician, you can try these safe and simple steps to rule out external factors or temporary issues:

1. Inspect the Cooling System:

• Ensure that any connected water cooling system is functioning correctly and has adequate water flow and pressure. If you suspect a cooling water supply issue, contact a technician.

1. Ensure Proper Ventilation:

• Check that the outdoor unit has sufficient clearance and airflow, removing any obstructions such as debris or overgrown vegetation.

1. Power Down the Unit:

• Turn off the air conditioning unit using its remote or control panel.
• If the unit is connected via internal wall wiring, safely use your home’s switchboard to power down the circuit supplying electricity to the Daikin unit.

1. Wait and Restart:

• Leave the system powered off for 10-15 minutes to allow it to reset.
• Restore power via the switchboard and turn the unit back on using the remote or control panel.

If the error persists, it likely points to a fault in the thermistor, cooling water system, or outdoor PCB, requiring professional servicing. Please don’t hesitate to ‘contact us’ or give us a free call on 1300 730 896 so we can organise a technician to assist you in resolving the error if the issue persists.

F3 Error Code

Error Description:

The F3 error code on a Daikin air conditioning unit indicates a malfunction related to the discharge pipe temperature, typically originating from the outdoor unit. This error may be caused by an abnormal discharge pipe temperature, a defective discharge pipe thermistor, a faulty outdoor unit control PCB, or poor connector contact.

Need for a Technician:

Yes, resolving the F3 error requires a trained HVAC technician. Diagnosing the issue involves testing the discharge pipe thermistor for proper temperature readings, inspecting the thermistor’s connectors, and verifying the functionality of the outdoor unit control PCB. These tasks require specialised tools and technical expertise.

Remedies for Untrained End-Users:

While the root cause usually requires professional servicing, you can try these safe and simple steps to address minor issues before contacting a technician:

1. Inspect the Outdoor Unit:

• Ensure the outdoor unit is free from debris, dirt, or obstructions that might cause overheating. Gently clean the exterior if necessary.

1. Check for Airflow Issues:

• Confirm that the outdoor unit has sufficient clearance (at least 50 cm) to allow proper ventilation. Remove any items or vegetation blocking airflow.

1. Power Down the Unit:

• Turn off the air conditioning unit using its remote or control panel.
• If the unit is connected via internal wall wiring, safely use your home’s switchboard to power down the circuit supplying electricity to the Daikin unit.

1. Wait and Restart:

• Leave the system powered off for 10-15 minutes to allow it to reset.
• Restore power via the switchboard and turn the unit back on using the remote or control panel.

If the error persists, it likely indicates a fault in the discharge pipe thermistor, outdoor unit PCB, or related connections, requiring professional attention. Please don’t hesitate to ‘contact us’ or give us a free call on 1300 730 896 so we can organise a technician to assist you in resolving the error if the issue persists.

F6 Error Code

Error Description:

The F6 error code on a Daikin air conditioning unit indicates an abnormal high-pressure condition in the refrigerant system, typically originating from the outdoor unit. This issue may result from refrigerant overcharge, a disconnected thermistor (heat exchanger deicer, outdoor air, or liquid pipe thermistor), or a defective outdoor unit PCB.

Need for a Technician:

Yes, resolving the F6 error requires a trained HVAC technician. Diagnosing this issue involves checking refrigerant levels to ensure they are not overcharged, inspecting thermistors for proper connection and functionality, and verifying the operation of the outdoor unit PCB. These diagnostics require specialised tools and technical expertise.

Remedies for Untrained End-Users:

While a technician is usually required to resolve the root cause, you can try these safe and straightforward steps to address minor external issues before contacting a technician:

1. Inspect the Outdoor Unit:

• Check for any obstructions or debris around the outdoor unit that may restrict airflow. Remove any blockages to improve ventilation.

1. Ensure Proper Clearance:

• Confirm that the outdoor unit has sufficient clearance (at least 50 cm) to allow proper airflow and prevent pressure build-up.

1. Power Down the Unit:

• Turn off the air conditioning unit using its remote or control panel.
• If the unit is connected via internal wall wiring, safely use your home’s switchboard to power down the circuit supplying electricity to the Daikin unit.

1. Wait and Restart:

• Leave the system powered off for 10-15 minutes to allow it to reset.
• Restore power via the switchboard and turn the unit back on using the remote or control panel.

If the error persists, it is likely due to an issue with the refrigerant level, thermistor connections, or outdoor unit PCB, requiring professional intervention. Please don’t hesitate to ‘contact us’ or give us a free call on 1300 730 896 so we can organise a technician to assist you in resolving the error if the issue persists.

H0 Error Code

Error Description:

The H0 error code on a Daikin air conditioning unit indicates a malfunction in the sensor system of the compressor, typically originating from the outdoor unit. This issue can be caused by a disconnected or defective harness connection or a faulty PCB (Printed Circuit Board).

Need for a Technician:

Yes, resolving the H0 error requires a trained HVAC technician. Diagnosing the issue involves inspecting the sensor system, verifying harness connections for proper contact, and testing the PCB to ensure accurate operation. These tasks require specialised tools and technical expertise to address safely and effectively.

Remedies for Untrained End-Users:

While professional servicing is generally required, you can try these safe and straightforward steps to rule out external factors or temporary issues:

1. Inspect the Outdoor Unit:

• Ensure the outdoor unit is clean and free from obstructions or debris that might interfere with normal operation. Avoid opening the unit or accessing internal components.

1. Power Down the Unit:

• Turn off the air conditioning unit using its remote or control panel.
• If the unit is connected via internal wall wiring, safely use your home’s switchboard to power down the circuit supplying electricity to the Daikin unit.

1. Wait and Restart:

• Leave the system powered off for 10-15 minutes to allow it to reset.
• Restore power via the switchboard and turn the unit back on using the remote or control panel.

If the error persists, it indicates a likely issue with the compressor sensor system, harness, or PCB, requiring professional repair or replacement. Please don’t hesitate to ‘contact us’ or give us a free call on 1300 730 896 so we can organise a technician to assist you in resolving the error if the issue persists.

H1 Error Code

Error Description:

The H1 error code on a Daikin air conditioning unit indicates a malfunction related to the room temperature sensor or the humidifier unit damper, typically originating from the indoor unit. This issue may result from a defective limit switch or a faulty damper.

Need for a Technician:

Yes, resolving the H1 error requires a trained HVAC technician. Diagnosing this issue involves testing the room temperature sensor and humidifier damper for proper operation and inspecting the limit switch for mechanical or electrical faults. These tasks demand specialised tools and technical expertise.

Remedies for Untrained End-Users:

While professional servicing is generally required, you can try these safe steps to address external factors or minor issues before contacting a technician:

1. Check for Obstructions:

• Inspect the area around the indoor unit for objects or debris that might block airflow or interfere with the sensor or damper’s functionality.

1. Adjust Settings:

• Confirm that the unit is operating in the correct mode (e.g., heating, cooling, or humidifying) and that the settings on the remote controller are configured appropriately.

1. Power Down the Unit:

• Turn off the air conditioning unit using its remote or control panel.
• If the unit is connected via internal wall wiring, safely use your home’s switchboard to power down the circuit supplying electricity to the Daikin unit.

1. Wait and Restart:

• Leave the system powered off for 10-15 minutes to allow it to reset.
• Restore power via the switchboard and turn the unit back on using the remote or control panel.

If the error persists, it likely indicates a fault in the room temperature sensor, damper, or limit switch that requires professional attention. Please don’t hesitate to ‘contact us’ or give us a free call on 1300 730 896 so we can organise a technician to assist you in resolving the error if the issue persists.

H3 Error Code

Error Description:

The H3 error code on a Daikin air conditioning unit indicates a malfunction of the high-pressure switch (HPS) in the outdoor unit. This issue may arise due to a defective high-pressure switch, a broken wire, a faulty outdoor unit PCB, or poor connector contact.

Need for a Technician:

Yes, resolving the H3 error requires a trained HVAC technician. Diagnosing this issue involves testing the high-pressure switch for proper operation, inspecting wiring for continuity or breaks, and checking the outdoor PCB and connectors for faults. These tasks require specialised tools and expertise to ensure accurate repairs.

Remedies for Untrained End-Users:

While the underlying issue usually requires professional servicing, you can try these safe and straightforward steps to address potential minor issues:

1. Inspect the Outdoor Unit:

• Check for obstructions, such as debris, dirt, or plants, around the outdoor unit that might block airflow. Clear any visible blockages carefully without opening the unit.

1. Ensure Proper Airflow:

• Confirm that there is sufficient clearance (at least 50 cm) around the outdoor unit to allow proper ventilation and prevent overheating.

1. Power Down the Unit:

• Turn off the air conditioning unit using its remote or control panel.
• If the unit is connected via internal wall wiring, safely use your home’s switchboard to power down the circuit supplying electricity to the Daikin unit.

1. Wait and Restart:

• Leave the system powered off for 10-15 minutes to allow it to reset.
• Restore power via the switchboard and turn the unit back on using the remote or control panel.

If the error persists, it likely indicates a fault in the high-pressure switch, wiring, or PCB, requiring professional servicing. Please don’t hesitate to ‘contact us’ or give us a free call on 1300 730 896 so we can organise a technician to assist you in resolving the error if the issue persists.

H4 Error Code

Error Description:

The H4 error code on a Daikin air conditioning unit indicates a malfunction of the low-pressure switch (LPS) in the outdoor unit. This error may be caused by a defective low-pressure switch, a broken wire, a faulty outdoor unit PCB, or poor connector contact.

Need for a Technician:

Yes, resolving the H4 error requires a trained HVAC technician. Diagnosing this issue involves testing the low-pressure switch for functionality, inspecting wiring for breaks or damage, and verifying the operation of the outdoor unit PCB and connectors. These diagnostics require specialised tools and technical expertise.

Remedies for Untrained End-Users:

While professional assistance is usually required, you can try the following steps to address minor or external issues safely:

1. Inspect the Outdoor Unit:

• Check for debris, dirt, or blockages around the outdoor unit that might impede airflow or refrigerant flow. Clear any visible obstructions carefully.

1. Ensure Proper Ventilation:

• Confirm that there is at least 50 cm of clearance around the outdoor unit to allow for adequate airflow and cooling.

1. Power Down the Unit:

• Turn off the air conditioning unit using its remote or control panel.
• If the unit is connected via internal wall wiring, safely use your home’s switchboard to power down the circuit supplying electricity to the Daikin unit.

1. Wait and Restart:

• Leave the system powered off for 10-15 minutes to reset.
• Restore power via the switchboard and turn the unit back on using the remote or control panel.

If the error persists, it likely indicates an issue with the low-pressure switch, wiring, or outdoor PCB, requiring professional servicing. Please don’t hesitate to ‘contact us’ or give us a free call on 1300 730 896 so we can organise a technician to assist you in resolving the error if the issue persists.

H5 Error Code

Error Description:

The H5 error code on a Daikin air conditioning unit indicates a malfunction of the compressor motor overload thermistor, typically originating from the outdoor unit. This error may be caused by a defective compressor motor overload thermistor or poor connector contact within the thermistor circuit.

Need for a Technician:

Yes, resolving the H5 error requires a trained HVAC technician. Diagnosing this issue involves testing the compressor motor overload thermistor for proper functionality and inspecting the connectors for secure and proper contact. These tasks demand technical expertise and the use of specialised diagnostic tools.

Remedies for Untrained End-Users:

While a technician is generally needed to fix the root cause, you can perform these simple steps to reset the system and check for minor external issues:

1. Inspect the Outdoor Unit:

• Ensure that the outdoor unit is free of debris, dirt, or obstructions that might impede airflow or cause overheating.

1. Ensure Proper Ventilation:

• Verify that the outdoor unit has sufficient clearance (at least 50 cm) on all sides to allow for proper airflow and cooling.

1. Power Down the Unit:

• Turn off the air conditioning unit using its remote or control panel.
• If the unit is connected via internal wall wiring, safely use your home’s switchboard to power down the circuit supplying electricity to the Daikin unit.

1. Wait and Restart:

• Leave the unit powered off for 10-15 minutes to allow it to reset.
• Restore power via the switchboard and turn the unit back on using the remote or control panel.

If the error persists, it is likely due to a fault in the thermistor or its connections, which requires professional servicing. Please don’t hesitate to ‘contact us’ or give us a free call on 1300 730 896 so we can organise a technician to assist you in resolving the error if the issue persists.

H6 Error Code

Error Description:

The H6 error code on a Daikin air conditioning unit typically indicates a malfunction of the position detection sensor in the outdoor unit. It can also be caused by a faulty contact of the compressor cable, a defective compressor, or a defective outdoor unit PCB (Printed Circuit Board).

Need for a Technician:

Yes, resolving the H6 error usually requires a trained HVAC technician. The issues involve diagnosing and repairing electrical components or replacing the position detection sensor or compressor, which are not safe or feasible for untrained individuals to handle.

Remedies for Untrained End-Users:

Before contacting a technician, you can try the following basic steps to reset the system safely:

1. Power Down the Unit:

• Turn off the air conditioning unit using its remote or control panel.
• If the unit is connected via internal wall wiring, safely use your home’s switchboard to power down the circuit supplying electricity to the Daikin unit.

1. Wait for a Few Minutes:

• Leave the unit powered off for about 5-10 minutes to allow the system to reset.

1. Power the Unit Back On:

• Restore power via the switchboard and turn the unit back on using the remote or control panel.

If the error persists after restarting, the problem likely requires professional intervention. Please don’t hesitate to ‘contact us’ or give us a free call on 1300 730 896 so we can organise a technician to assist you in resolving the error if the issue persists.

H7 Error Code

Error Description:

The H7 error code on a Daikin air conditioning unit indicates a malfunction of the outdoor unit fan motor signal. This issue may be caused by an abnormal signal from the fan motor (circuit failure), a disconnection or short circuit in the fan motor leads, a loose or disconnected connector, or a defective inverter PCB.

Need for a Technician:

Yes, resolving the H7 error requires a trained HVAC technician. Diagnosing this issue involves testing the outdoor unit fan motor for electrical continuity, inspecting the wiring and connectors for disconnection or short circuits, and verifying the operation of the inverter PCB. These tasks require specialised tools and technical knowledge.

Remedies for Untrained End-Users:

Although professional servicing is usually required, you can attempt these safe and simple steps to reset the system and check for external issues before contacting a technician:

1. Inspect the Outdoor Unit:

• Ensure that the outdoor unit is clean and free from debris or obstructions that might prevent the fan from operating correctly.

1. Check for Airflow Blockages:

• Verify that there is sufficient clearance (at least 50 cm) around the outdoor unit to allow proper airflow and ventilation.

1. Power Down the Unit:

• Turn off the air conditioning unit using its remote or control panel.
• If the unit is connected via internal wall wiring, safely use your home’s switchboard to power down the circuit supplying electricity to the Daikin unit.

1. Wait and Restart:

• Leave the unit powered off for 10-15 minutes to allow it to reset.
• Restore power via the switchboard and turn the unit back on using the remote or control panel.

If the error persists, it likely indicates a fault in the fan motor, its wiring, or the inverter PCB, which will require professional servicing. Please don’t hesitate to ‘contact us’ or give us a free call on 1300 730 896 so we can organise a technician to assist you in resolving the error if the issue persists.

H8 Error Code

Error Description:

The H8 error code on a Daikin air conditioning unit indicates a malfunction in the compressor input (CT) system, typically originating from the outdoor unit. This issue may be caused by a defective power transistor, a faulty reactor, improper wiring in the inverter system, or a defective outdoor unit PCB.

Need for a Technician:

Yes, resolving the H8 error requires a trained HVAC technician. Diagnosing this issue involves testing the compressor input system, inspecting the reactor and power transistor for faults, verifying inverter wiring, and examining the outdoor unit PCB for malfunctions. These tasks require advanced diagnostic tools and expertise.

Remedies for Untrained End-Users:

While professional servicing is typically necessary, you can try these simple and safe steps to reset the system and check for external factors:

1. Inspect the Outdoor Unit:

• Ensure the outdoor unit is clean and free of debris, dirt, or obstructions that might affect its operation.

1. Check for Airflow Issues:

• Verify there is at least 50 cm of clearance around the outdoor unit to allow proper ventilation and prevent overheating.

1. Power Down the Unit:

• Turn off the air conditioning unit using its remote or control panel.
• If the unit is connected via internal wall wiring, safely use your home’s switchboard to power down the circuit supplying electricity to the Daikin unit.

1. Wait and Restart:

• Leave the unit powered off for 10-15 minutes to allow the system to reset.
• Restore power via the switchboard and turn the unit back on using the remote or control panel.

If the error persists, it likely indicates a problem with the compressor input system, requiring professional troubleshooting and repair. Please don’t hesitate to ‘contact us’ or give us a free call on 1300 730 896 so we can organise a technician to assist you in resolving the error if the issue persists.

H9 Error Code

Error Description:

The H9 error code on a Daikin air conditioning unit indicates a malfunction in the outdoor air thermistor, originating from the outdoor unit. This issue may be caused by a defective outdoor air thermistor, a faulty connection of the thermistor, or a defective outdoor unit PCB.

Need for a Technician:

Yes, resolving the H9 error requires a trained HVAC technician. Diagnosing this issue involves testing the outdoor air thermistor for accurate temperature readings, inspecting its connections for disconnections or damage, and verifying the operation of the outdoor unit PCB. These tasks require specialised tools and expertise to ensure accurate and safe repairs.

Remedies for Untrained End-Users:

Although a technician is usually needed to address the root cause, you can try these safe and simple steps to rule out external factors before contacting a professional:

1. Inspect the Outdoor Unit:

• Ensure the outdoor unit is free from debris, dirt, or obstructions that could impact the thermistor or airflow.

1. Ensure Proper Ventilation:

• Confirm that there is sufficient clearance (at least 50 cm) around the outdoor unit for adequate ventilation.

1. Power Down the Unit:

• Turn off the air conditioning unit using its remote or control panel.
• If the unit is connected via internal wall wiring, safely use your home’s switchboard to power down the circuit supplying electricity to the Daikin unit.

1. Wait and Restart:

• Leave the unit powered off for 10-15 minutes to allow the system to reset.
• Restore power via the switchboard and turn the unit back on using the remote or control panel.

If the error persists, it indicates a likely fault in the thermistor, its connection, or the outdoor PCB that requires professional servicing. Please don’t hesitate to ‘contact us’ or give us a free call on 1300 730 896 so we can organise a technician to assist you in resolving the error if the issue persists.

HC Error Code

Error Description:

The HC error code on a Daikin air conditioning unit indicates a malfunction in the (hot) water temperature thermistor, typically originating from the outdoor unit. This issue may result from a defective water temperature thermistor, a faulty connection of the thermistor, or a defective outdoor unit PCB.

Need for a Technician:

Yes, resolving the HC error requires a trained HVAC technician. Diagnosing this issue involves testing the water temperature thermistor for accurate temperature readings, inspecting its connections for disconnections or damage, and checking the outdoor unit PCB for faults. These tasks require specialised tools and expertise.

Remedies for Untrained End-Users:

While a technician is generally required to fix the root cause, you can attempt these safe steps to address potential external issues before contacting a professional:

1. Inspect the Outdoor Unit:

• Check the outdoor unit for visible obstructions, debris, or dirt that could interfere with its operation or airflow. Gently clean the area if necessary.

1. Ensure Proper System Settings:

• Verify that the water heating or cooling mode is correctly set on your remote or control panel.

1. Power Down the Unit:

• Turn off the air conditioning unit using its remote or control panel.
• If the unit is connected via internal wall wiring, safely use your home’s switchboard to power down the circuit supplying electricity to the Daikin unit.

1. Wait and Restart:

• Leave the system powered off for 10-15 minutes to allow it to reset.
• Restore power via the switchboard and turn the unit back on using the remote or control panel.

If the error persists, it likely points to a problem with the water temperature thermistor, its connection, or the outdoor PCB, requiring professional intervention. Please don’t hesitate to ‘contact us’ or give us a free call on 1300 730 896 so we can organise a technician to assist you in resolving the error if the issue persists.

HF Error Code

Error Description:

The HF error code on a Daikin air conditioning unit indicates an alarm in the thermal storage unit or storage controller, typically relating to the outdoor unit or a connected thermal storage system. Possible causes include defective wiring in the thermal storage group, incorrect settings, or an excess of configured thermal storage tank numbers.

Need for a Technician:

Yes, resolving the HF error requires a trained HVAC technician. Diagnosing this issue involves verifying the configuration of the thermal storage system, inspecting the wiring for defects or disconnections, and ensuring the settings align with the installed system. These tasks require technical expertise and access to advanced diagnostic tools.

Remedies for Untrained End-Users:

While professional servicing is typically necessary, you can take these steps to rule out minor configuration or external issues safely:

1. Verify System Configuration:

• Check your control panel or remote to ensure that the system settings match the number and type of thermal storage tanks installed.

1. Inspect for Visible Issues:

• Look for any visible wiring issues, such as loose or disconnected cables, around the outdoor unit or thermal storage system. Do not attempt repairs.

1. Power Down the Unit:

• Turn off the air conditioning unit using its remote or control panel.
• If the unit is connected via internal wall wiring, safely use your home’s switchboard to power down the circuit supplying electricity to the Daikin unit.

1. Wait and Restart:

• Leave the unit powered off for 10-15 minutes to allow the system to reset.
• Restore power via the switchboard and turn the unit back on using the remote or control panel.

If the error persists, it is likely due to a configuration or hardware issue within the thermal storage system, requiring professional attention. Please don’t hesitate to ‘contact us’ or give us a free call on 1300 730 896 so we can organise a technician to assist you in resolving the error if the issue persists.

HJ Error Code on Daikin Air Conditioning Unit

Error Description:

The HJ error code on a Daikin air conditioning unit indicates a malfunction in the thermal storage tank water level system, typically related to a low water level, defective switch settings, a failure in the water level detecting sensor, or faulty connector contact. This issue originates from components connected to the thermal storage system, not the indoor unit itself.

Need for a Technician:

Yes, resolving the HJ error requires a trained HVAC technician. Diagnosing this issue involves inspecting the water level detecting sensor for proper operation, verifying the switch settings, checking the tank’s water level, and testing the connectors for faults. These tasks demand technical expertise and specialised equipment.

Remedies for Untrained End-Users:

While a technician is usually required to address the root cause, you can try the following simple steps safely:

1. Check the Thermal Storage Tank:

• Inspect the thermal storage tank for signs of low water levels or leaks. Do not attempt to open or service the tank yourself.

1. Inspect for Visible Issues:

• Look for visible disconnections or damage to the wires or connectors leading to the thermal storage system. Avoid handling or attempting repairs, as these are high-voltage connections.

1. Power Down the Unit:

• Turn off the air conditioning unit using its remote or control panel.
• If the unit is connected via internal wall wiring, safely use your home’s switchboard to power down the circuit supplying electricity to the Daikin unit.

1. Wait and Restart:

• Leave the unit powered off for 10-15 minutes to allow the system to reset.
• Restore power via the switchboard and turn the unit back on using the remote or control panel.

If the error persists, it likely indicates a failure in the water level detecting sensor, switch settings, or related connections, which requires professional servicing. Please don’t hesitate to ‘contact us’ or give us a free call on 1300 730 896 so we can organise a technician to assist you in resolving the error if the issue persists.

J1 Error Code

Error Description:

The J1 error code on a Daikin air conditioning unit indicates a malfunction in the pressure sensor, originating from the outdoor unit. This error may result from a defective pressure sensor, faulty connector contact, or a malfunctioning outdoor unit PCB.

Need for a Technician:

Yes, resolving the J1 error requires a trained HVAC technician. Diagnosing this issue involves testing the pressure sensor for accurate readings, inspecting the connectors for secure contact, and verifying the functionality of the outdoor unit PCB. These tasks demand technical expertise and specialised diagnostic tools.

Remedies for Untrained End-Users:

While professional assistance is usually required, you can perform the following simple steps to address external or temporary issues:

1. Inspect the Outdoor Unit:

• Ensure the outdoor unit is clean and free from obstructions, such as debris or dirt, that could impact its operation.

1. Check for Proper Airflow:

• Confirm that there is at least 50 cm of clearance around the outdoor unit to allow for sufficient ventilation.

1. Power Down the Unit:

• Turn off the air conditioning unit using its remote or control panel.
• If the unit is connected via internal wall wiring, safely use your home’s switchboard to power down the circuit supplying electricity to the Daikin unit.

1. Wait and Restart:

• Leave the system powered off for 10-15 minutes to allow it to reset.
• Restore power via the switchboard and turn the unit back on using the remote or control panel.

If the error persists, it is likely due to a fault in the pressure sensor, its connection, or the outdoor unit PCB, requiring professional servicing. Please don’t hesitate to ‘contact us’ or give us a free call on 1300 730 896 so we can organise a technician to assist you in resolving the error if the issue persists.

J2 Error Code

Error Description:

The J2 error code on a Daikin air conditioning unit indicates a malfunction in the current sensor of the compressor, typically originating from the outdoor unit. This error may be caused by a defective current sensor, a faulty compressor, or a malfunctioning outdoor unit PCB.

Need for a Technician:

Yes, resolving the J2 error requires a trained HVAC technician. Diagnosing this issue involves testing the current sensor to ensure it is providing accurate readings, inspecting the compressor for faults, and verifying the integrity of the outdoor unit PCB. These tasks demand advanced diagnostic tools and technical expertise.

Remedies for Untrained End-Users:

While professional assistance is typically required, you can take these simple and safe steps to reset the system and rule out minor issues before contacting a technician:

1. Inspect the Outdoor Unit:

• Check the outdoor unit for any debris, dirt, or obstructions that could be impacting its performance. Clear away any visible blockages.

1. Ensure Adequate Ventilation:

• Confirm there is sufficient clearance (at least 50 cm) around the outdoor unit to allow proper airflow and prevent overheating.

1. Power Down the Unit:

• Turn off the air conditioning unit using its remote or control panel.
• If the unit is connected via internal wall wiring, safely use your home’s switchboard to power down the circuit supplying electricity to the Daikin unit.

1. Wait and Restart:

• Leave the unit powered off for 10-15 minutes to allow the system to reset.
• Restore power via the switchboard and turn the unit back on using the remote or control panel.

If the error persists, it is likely due to a fault in the current sensor, compressor, or outdoor PCB, requiring professional intervention. Please don’t hesitate to ‘contact us’ or give us a free call on 1300 730 896 so we can organise a technician to assist you in resolving the error if the issue persists.

J3 Error Code

Error Description:

The J3 error code on a Daikin air conditioning unit indicates a malfunction in the discharge pipe thermistor, typically originating from the outdoor unit. This issue may be caused by a defective discharge pipe thermistor, a faulty connection of the thermistor, or a malfunctioning outdoor unit PCB.

Need for a Technician:

Yes, resolving the J3 error requires a trained HVAC technician. Diagnosing this issue involves testing the discharge pipe thermistor for proper functionality, checking its connections for damage or disconnections, and inspecting the outdoor unit PCB for potential faults. These steps require specialised tools and technical expertise.

Remedies for Untrained End-Users:

While professional assistance is usually required, you can try these simple and safe steps to reset the system and rule out minor issues:

1. Inspect the Outdoor Unit:

• Check the outdoor unit for any visible debris, dirt, or obstructions that might affect the thermistor’s operation. Gently clean the area if necessary.

1. Ensure Proper Ventilation:

• Confirm that there is at least 50 cm of clearance around the outdoor unit for adequate airflow and cooling.

1. Power Down the Unit:

• Turn off the air conditioning unit using its remote or control panel.
• If the unit is connected via internal wall wiring, safely use your home’s switchboard to power down the circuit supplying electricity to the Daikin unit.

1. Wait and Restart:

• Leave the system powered off for 10-15 minutes to allow it to reset.
• Restore power via the switchboard and turn the unit back on using the remote or control panel.

If the error persists, it is likely due to a fault in the thermistor, its connection, or the outdoor PCB, requiring professional servicing. Please don’t hesitate to ‘contact us’ or give us a free call on 1300 730 896 so we can organise a technician to assist you in resolving the error if the issue persists.

J4 Error Code

Error Description:

The J4 error code on a Daikin air conditioning unit indicates a malfunction in the low-pressure equivalent saturated temperature sensor system, typically originating from the outdoor unit. This issue may be caused by a defective thermistor, a faulty connection of the thermistor, or a malfunctioning outdoor unit PCB.

Need for a Technician:

Yes, resolving the J4 error requires a trained HVAC technician. Diagnosing this issue involves testing the low-pressure equivalent saturated temperature sensor for proper operation, inspecting the thermistor connections for faults, and evaluating the outdoor unit PCB for potential issues. These steps require technical expertise and specialised diagnostic tools.

Remedies for Untrained End-Users:

Although professional servicing is usually required, you can try these safe and simple steps to rule out minor issues before contacting a technician:

1. Inspect the Outdoor Unit:

• Ensure the outdoor unit is free of debris, dirt, or obstructions that might interfere with airflow or the thermistor’s performance.

1. Check for Proper Airflow:

• Verify that there is sufficient clearance (at least 50 cm) around the outdoor unit to allow proper ventilation and prevent overheating.

1. Power Down the Unit:

• Turn off the air conditioning unit using its remote or control panel.
• If the unit is connected via internal wall wiring, safely use your home’s switchboard to power down the circuit supplying electricity to the Daikin unit.

1. Wait and Restart:

• Leave the unit powered off for 10-15 minutes to allow the system to reset.
• Restore power via the switchboard and turn the unit back on using the remote or control panel.

If the error persists, it indicates a likely fault in the thermistor, its connections, or the outdoor PCB, requiring professional attention. Please don’t hesitate to ‘contact us’ or give us a free call on 1300 730 896 so we can organise a technician to assist you in resolving the error if the issue persists.

J5 Error Code

Error Description:

The J5 error code on a Daikin air conditioning unit indicates a malfunction in the suction pipe thermistor, typically originating from the outdoor unit. This issue may be caused by a defective suction pipe thermistor, a faulty thermistor connection, or a malfunctioning outdoor unit PCB.

Need for a Technician:

Yes, resolving the J5 error requires a trained HVAC technician. Diagnosing this issue involves testing the suction pipe thermistor for accurate readings, inspecting the thermistor’s connections for damage or disconnections, and verifying the operation of the outdoor unit PCB. These tasks require technical expertise and specialised tools.

Remedies for Untrained End-Users:

While professional servicing is typically necessary, you can try these simple and safe steps to rule out minor issues before contacting a technician:

1. Inspect the Outdoor Unit:

• Check the outdoor unit for debris, dirt, or obstructions that could interfere with the thermistor or airflow. Gently clean the area if needed.

1. Ensure Proper Airflow:

• Confirm there is adequate clearance (at least 50 cm) around the outdoor unit to ensure proper ventilation and cooling.

1. Power Down the Unit:

• Turn off the air conditioning unit using its remote or control panel.
• If the unit is connected via internal wall wiring, safely use your home’s switchboard to power down the circuit supplying electricity to the Daikin unit.

1. Wait and Restart:

• Leave the unit powered off for 10-15 minutes to allow the system to reset.
• Restore power via the switchboard and turn the unit back on using the remote or control panel.

If the error persists, it is likely due to a fault in the suction pipe thermistor, its connections, or the outdoor PCB, requiring professional intervention. Please don’t hesitate to ‘contact us’ or give us a free call on 1300 730 896 so we can organise a technician to assist you in resolving the error if the issue persists.

J6 Error Code

Error Description:

The J6 error code on a Daikin air conditioning unit indicates a malfunction in the heat exchanger thermistor, typically originating from the outdoor unit. This issue may be caused by a defective heat exchanger thermistor, a faulty connection of the thermistor, or a malfunctioning outdoor unit PCB.

Need for a Technician:

Yes, resolving the J6 error requires a trained HVAC technician. Diagnosing this issue involves testing the heat exchanger thermistor for proper operation, inspecting the thermistor’s connections for faults or damage, and evaluating the outdoor unit PCB for potential issues. These tasks require specialised diagnostic tools and technical expertise.

Remedies for Untrained End-Users:

Although professional servicing is usually necessary, you can perform the following safe steps to rule out external or minor issues before calling a technician:

1. Inspect the Outdoor Unit:

• Check the outdoor unit for any visible obstructions, debris, or dirt that might impact the thermistor or airflow. Gently clean the area if needed.

1. Ensure Proper Ventilation:

• Confirm there is sufficient clearance (at least 50 cm) around the outdoor unit to ensure proper airflow and prevent overheating.

1. Power Down the Unit:

• Turn off the air conditioning unit using its remote or control panel.
• If the unit is connected via internal wall wiring, safely use your home’s switchboard to power down the circuit supplying electricity to the Daikin unit.

1. Wait and Restart:

• Leave the unit powered off for 10-15 minutes to allow the system to reset.
• Restore power via the switchboard and turn the unit back on using the remote or control panel.

If the error persists, it indicates a likely issue with the heat exchanger thermistor, its connections, or the outdoor PCB, requiring professional attention. Please don’t hesitate to ‘contact us’ or give us a free call on 1300 730 896 so we can organise a technician to assist you in resolving the error if the issue persists.

J7 Error Code

Error Description:

The J7 error code on a Daikin air conditioning unit indicates a malfunction in the thermistor related to the refrigerant circuit, typically originating from the outdoor unit. This issue may be caused by a defective liquid pipe thermistor, a faulty connection of the thermistor, or a malfunctioning outdoor unit PCB.

Need for a Technician:

Yes, resolving the J7 error requires a trained HVAC technician. Diagnosing this issue involves testing the liquid pipe thermistor for accurate functionality, inspecting its connections for faults or disconnections, and verifying the operation of the outdoor unit PCB. These steps demand specialised tools and technical expertise.

Remedies for Untrained End-Users:

While professional servicing is generally required, you can perform these simple and safe steps to rule out minor issues before contacting a technician:

1. Inspect the Outdoor Unit:

• Check the outdoor unit for visible obstructions, dirt, or debris that might interfere with its operation. Gently clean the area if necessary.

1. Ensure Proper Ventilation:

• Verify that the outdoor unit has sufficient clearance (at least 50 cm) on all sides to allow proper airflow and cooling.

1. Power Down the Unit:

• Turn off the air conditioning unit using its remote or control panel.
• If the unit is connected via internal wall wiring, safely use your home’s switchboard to power down the circuit supplying electricity to the Daikin unit.

1. Wait and Restart:

• Leave the unit powered off for 10-15 minutes to allow it to reset.
• Restore power via the switchboard and turn the unit back on using the remote or control panel.

If the error persists, it is likely due to a fault in the liquid pipe thermistor, its connections, or the outdoor PCB, requiring professional attention. Please don’t hesitate to ‘contact us’ or give us a free call on 1300 730 896 so we can organise a technician to assist you in resolving the error if the issue persists.

J8 Error Code

Error Description:

The J8 error code on a Daikin air conditioning unit indicates a malfunction in the thermistor within the refrigerant circuit, typically originating from the outdoor unit. This issue may stem from a defective liquid pipe thermistor, a faulty thermistor connection, or a malfunctioning outdoor unit PCB.

Need for a Technician:

Yes, resolving the J8 error requires a trained HVAC technician. Diagnosing the issue involves testing the thermistor for proper functionality, checking for secure connections, and inspecting the outdoor unit PCB for any defects. These tasks require specialised tools and technical expertise.

Remedies for Untrained End-Users:

Although professional intervention is usually necessary, you can try these simple steps to rule out minor or external issues:

1. Inspect the Outdoor Unit:

• Ensure the outdoor unit is clean and free from debris or obstructions that might hinder its performance.

1. Check Ventilation:

• Verify that there is sufficient clearance (at least 50 cm) around the outdoor unit to promote proper airflow and prevent overheating.

1. Power Down the Unit:

• Turn off the unit using its remote or control panel.
• If the unit is connected via internal wall wiring, safely use your home’s switchboard to power down the circuit supplying electricity to the Daikin unit.

1. Wait and Restart:

• Leave the system powered off for 10-15 minutes to allow it to reset.
• Restore power via the switchboard and turn the unit back on using the remote or control panel.

If the error persists, it likely indicates a problem with the thermistor, its connection, or the outdoor unit PCB, requiring professional attention. Please don’t hesitate to ‘contact us’ or give us a free call on 1300 730 896 so we can organise a technician to assist you in resolving the error if the issue persists.

J9 Error Code

Error Description:

The J9 error code on a Daikin air conditioning unit indicates a malfunction in the thermistor related to the refrigerant circuit, specifically the gas pipe thermistor, typically originating from the outdoor unit. The issue may be caused by a defective gas pipe thermistor, a faulty thermistor connection, or a malfunctioning outdoor unit PCB.

Need for a Technician:

Yes, resolving the J9 error requires a trained HVAC technician. Diagnosing this issue involves testing the gas pipe thermistor for accurate readings, inspecting its connections for damage or disconnection, and evaluating the outdoor unit PCB for faults. These procedures require technical expertise and specialised diagnostic tools.

Remedies for Untrained End-Users:

While professional servicing is likely needed, you can try these safe and simple steps to rule out minor issues before contacting a technician:

1. Inspect the Outdoor Unit:

• Check for debris, dirt, or obstructions around the outdoor unit that might affect its performance. Gently clean the area if necessary.

1. Ensure Proper Airflow:

• Confirm there is adequate clearance (at least 50 cm) around the outdoor unit to allow proper ventilation and cooling.

1. Power Down the Unit:

• Turn off the air conditioning unit using its remote or control panel.
• If the unit is connected via internal wall wiring, safely use your home’s switchboard to power down the circuit supplying electricity to the Daikin unit.

1. Wait and Restart:

• Leave the unit powered off for 10-15 minutes to reset the system.
• Restore power via the switchboard and turn the unit back on using the remote or control panel.

If the error persists, it is likely due to a thermistor issue, a connection fault, or a defective PCB, requiring professional attention. Please don’t hesitate to ‘contact us’ or give us a free call on 1300 730 896 so we can organise a technician to assist you in resolving the error if the issue persists.

JA Error Code

Error Description:

The JA error code on a Daikin air conditioning unit indicates a malfunction in the high-pressure sensor, typically originating from the outdoor unit. This issue can be caused by a defective high-pressure sensor, an incorrect connection of the low-pressure sensor to the high-pressure sensor port, faulty sensor connections, or a defective outdoor unit PCB.

Need for a Technician:

Yes, resolving the JA error requires a trained HVAC technician. Diagnosing the issue involves verifying the high-pressure sensor’s accuracy, ensuring proper sensor connections, and checking for faults in the outdoor unit PCB. These steps demand specialised tools and technical expertise.

Remedies for Untrained End-Users:

Although professional intervention is typically necessary, you can try these simple steps to rule out minor external issues:

1. Inspect the Outdoor Unit:

• Ensure the outdoor unit is free from visible obstructions, debris, or dirt that might interfere with its performance. Gently clean the area if needed.

1. Check for Proper Ventilation:

• Verify that there is sufficient clearance (at least 50 cm) around the outdoor unit to allow for proper airflow and prevent overheating.

1. Power Down the Unit:

• Turn off the air conditioning unit using its remote or control panel.
• If the unit is connected via internal wall wiring, safely use your home’s switchboard to power down the circuit supplying electricity to the Daikin unit.

1. Wait and Restart:

• Leave the system powered off for 10-15 minutes to allow it to reset.
• Restore power via the switchboard and turn the unit back on using the remote or control panel.

If the error persists, it is likely due to a fault with the high-pressure sensor, its connections, or the outdoor unit PCB, requiring professional assessment and repair. Please don’t hesitate to ‘contact us’ or give us a free call on 1300 730 896 so we can organise a technician to assist you in resolving the error if the issue persists.

JC Error Code

Error Description:

The JC error code on a Daikin air conditioning unit indicates a malfunction in the low-pressure sensor, usually originating from the outdoor unit. This issue may be caused by a defective low-pressure sensor, an incorrect connection of the high-pressure sensor to the low-pressure sensor port, faulty sensor connections, or a defective outdoor unit PCB.

Need for a Technician:

Yes, resolving the JC error requires a trained HVAC technician. The technician will need to test the low-pressure sensor for accuracy, check the connections for proper wiring, and inspect the outdoor unit PCB for potential faults. These steps require specialised diagnostic tools and technical expertise.

Remedies for Untrained End-Users:

Although this issue is likely to require professional intervention, you can try the following steps to rule out minor problems before contacting a technician:

1. Inspect the Outdoor Unit:

• Ensure the outdoor unit is clean and free from obstructions, such as debris or vegetation, that might interfere with normal operation.

1. Ensure Adequate Ventilation:

• Check that the outdoor unit has sufficient clearance (at least 50 cm) around it for proper airflow.

1. Power Down the Unit:

• Turn off the air conditioning unit using the remote or control panel.
• If the unit is connected via internal wall wiring, safely use your home’s switchboard to power down the circuit supplying electricity to the Daikin unit.

1. Wait and Restart:

• Leave the system powered off for 10-15 minutes to allow it to reset.
• Restore power via the switchboard and turn the unit back on using the remote or control panel.

If the JC error persists, it likely indicates a problem with the low-pressure sensor, its connections, or the outdoor unit PCB, requiring professional repair. Please don’t hesitate to ‘contact us’ or give us a free call on 1300 730 896 so we can organise a technician to assist you in resolving the error if the issue persists.

JE Error Code

Error Description:

The JE error code on a Daikin air conditioning unit indicates a malfunction in the oil pressure sensor or sub-tank thermistor, usually originating from the outdoor unit. The issue may be caused by a defective oil pressure sensor, a faulty sub-tank thermistor, defective connector contacts, or a malfunctioning outdoor unit PCB.

Need for a Technician:

Yes, resolving the JE error requires a trained HVAC technician. The technician will need to test the oil pressure sensor and sub-tank thermistor for functionality, inspect the connections for continuity, and evaluate the outdoor unit PCB for potential defects. These tasks involve the use of specialised diagnostic equipment and technical knowledge.

Remedies for Untrained End-Users:

While professional servicing is likely required, you can attempt these simple troubleshooting steps to rule out minor issues:

1. Inspect the Outdoor Unit:

• Ensure the outdoor unit is clean and free of debris or obstructions that could impact performance.

1. Check for Proper Ventilation:

• Verify that there is adequate clearance (at least 50 cm) around the outdoor unit to allow for proper airflow.

1. Power Down the Unit:

• Turn off the air conditioning unit using the remote or control panel.
• If the unit is connected via internal wall wiring, safely use your home’s switchboard to power down the circuit supplying electricity to the Daikin unit.

1. Wait and Restart:

• Leave the system powered off for 10-15 minutes to reset.
• Restore power via the switchboard and turn the unit back on using the remote or control panel.

If the JE error persists, it indicates a deeper issue with the oil pressure sensor, sub-tank thermistor, or outdoor unit PCB that requires professional repair. Please don’t hesitate to ‘contact us’ or give us a free call on 1300 730 896 so we can organise a technician to assist you in resolving the error if the issue persists.

JF Error Code

Error Description:

The JF error code on a Daikin air conditioning unit indicates a malfunction in the oil level sensor or the heating heat exchanger thermistor, typically originating from the outdoor unit. This issue may arise from a defective oil level sensor, faulty heat exchanger thermistor, defective connector contacts, or a malfunctioning outdoor unit PCB.

Need for a Technician:

Yes, resolving the JF error requires a trained HVAC technician. Diagnosing and resolving this issue involves testing the oil level sensor and heat exchanger thermistor, verifying the integrity of the connectors, and inspecting the outdoor unit PCB for faults. These processes require specialised tools and technical knowledge.

Remedies for Untrained End-Users:

While professional intervention is likely needed, you can try the following troubleshooting steps to address any minor issues:

1. Inspect the Outdoor Unit:

• Ensure the outdoor unit is clean and free of any obstructions, such as debris or vegetation, that might affect its operation.

1. Check for Proper Airflow:

• Verify that the outdoor unit has adequate clearance (at least 50 cm) on all sides to ensure proper ventilation.

1. Power Down the Unit:

• Turn off the air conditioning unit using the remote or control panel.
• If the unit is connected via internal wall wiring, safely use your home’s switchboard to power down the circuit supplying electricity to the Daikin unit.

1. Wait and Restart:

• Leave the system powered off for 10-15 minutes to allow it to reset.
• Restore power via the switchboard and turn the unit back on using the remote or control panel.

If the error persists, the issue likely stems from a defective oil level sensor, heat exchanger thermistor, or outdoor unit PCB, and professional servicing will be required. Please don’t hesitate to ‘contact us’ or give us a free call on 1300 730 896 so we can organise a technician to assist you in resolving the error if the issue persists.

L0 Error Code

Error Description:

The L0 error code on a Daikin air conditioning unit indicates a malfunction in the inverter system, typically originating from the outdoor unit. This issue may result from a shortage of power supply capacity, a defective power transistor, or a malfunctioning outdoor unit PCB.

Need for a Technician:

Yes, resolving the L0 error requires a trained HVAC technician. Diagnosing the inverter system involves checking the power transistor’s operation and inspecting the outdoor unit PCB. These components are complex and require specialised tools and expertise to assess and repair.

Remedies for Untrained End-Users:

Before calling a technician, you can try the following basic troubleshooting steps:

1. Check Power Supply:

• Ensure that your home’s power supply is stable and sufficient to support the air conditioning unit.
• Avoid running multiple high-energy devices simultaneously on the same circuit.

1. Inspect the Outdoor Unit:

• Clear any debris, dirt, or obstructions around the outdoor unit that may impede its performance.

1. Power Down the Unit:

• Turn off the air conditioning unit using the remote or control panel.
• If the unit is connected via internal wall wiring, safely use your home’s switchboard to power down the circuit supplying electricity to the Daikin unit.

1. Restart the Unit:

• After leaving the system off for 10-15 minutes to reset, restore power via the switchboard and turn the unit back on using the remote or control panel.

If the L0 error persists, it indicates a more serious issue with the inverter system or outdoor unit PCB, requiring professional servicing. Please don’t hesitate to ‘contact us’ or give us a free call on 1300 730 896 so we can organise a technician to assist you in resolving the error if the issue persists.

L1 Error Code

Error Description:

The L1 error code on a Daikin air conditioning unit signifies a malfunction in the inverter PCB, typically located in the outdoor unit. This issue can be caused by defective compressor wiring, a blown fuse, a faulty outdoor unit fan motor, or the inverter PCB itself.

Need for a Technician:

Yes, resolving the L1 error requires a trained HVAC technician. Diagnosing and repairing the inverter PCB, compressor wiring, or fan motor involves advanced electrical and technical expertise, as well as specialised diagnostic tools to check for component failures or wiring issues.

Remedies for Untrained End-Users:

While a technician is typically required for this error, you can perform the following steps before calling for professional assistance:

1. Inspect the Outdoor Unit:

• Ensure the outdoor unit is free from debris, dirt, or physical obstructions that may be impeding its performance.

1. Power Down the Unit:

• Turn off the air conditioning unit using the remote or control panel.
• If the unit is connected via internal wall wiring, safely use your home’s switchboard to power down the circuit supplying electricity to the Daikin unit.

1. Restart the Unit:

• After leaving the system off for 10-15 minutes to reset, restore power via the switchboard and turn the unit back on using the remote or control panel.

If the L1 error persists, this indicates a deeper issue requiring professional servicing. Please don’t hesitate to ‘contact us’ or give us a free call on 1300 730 896 so we can organise a technician to assist you in resolving the error if the issue persists.

L3 Error Code

Error Description:

The L3 error code on a Daikin air conditioning unit indicates a temperature rise in the electrical components box or fin temperature rise due to potential short circuits. This issue typically originates in the outdoor unit and may result from a defective outdoor unit fan motor, faulty power transistor, or a malfunctioning outdoor unit PCB.

Need for a Technician:

Yes, resolving the L3 error requires a trained HVAC technician. Diagnosing and addressing issues such as a defective fan motor or a short circuit involves specialised equipment to test electrical components and repair or replace malfunctioning parts safely.

Remedies for Untrained End-Users:

Although a technician is generally required, you can perform the following preliminary checks and actions:

1. Check Outdoor Unit Ventilation:

• Ensure that the outdoor unit is not obstructed by debris, dirt, or vegetation, which can impede airflow and cause overheating.
• Clear any visible blockages around the unit.

1. Power Down the Unit:

• Turn off the air conditioning unit using the remote or control panel.
• If the unit is connected via internal wall wiring, safely use your home’s switchboard to power down the circuit supplying electricity to the Daikin unit.

1. Restart the Unit:

• After leaving the system off for 15-20 minutes to cool down and reset, restore power via the switchboard and turn the unit back on using the remote or control panel.

If the L3 error persists after these steps, professional servicing will be necessary. Please don’t hesitate to ‘contact us’ or give us a free call on 1300 730 896 so we can organise a technician to assist you in resolving the error if the issue persists.

L4 Error Code

Error Description:

The L4 error code on a Daikin air conditioning unit indicates a malfunction due to the temperature rise of the inverter radiation fin. This issue is typically caused by factors such as a short circuit or a defective fin thermistor, and it originates in the outdoor unit.

Need for a Technician:

Yes, resolving the L4 error requires a trained HVAC technician. Diagnosing the root cause of the temperature rise, testing the fin thermistor, and checking for short circuits in the inverter system involve specialised tools and technical expertise.

Remedies for Untrained End-Users:

While the resolution of the L4 error ultimately requires professional intervention, you can perform the following preliminary steps to rule out simple external causes:

1. Inspect the Outdoor Unit for Obstructions:

• Check the outdoor unit for any dirt, leaves, or debris that might block airflow around the unit or the radiation fin.
• Clear away any visible obstructions to improve ventilation.

1. Ensure Adequate Clearance:

• Confirm that the outdoor unit has sufficient space around it for proper heat dissipation (at least 30–50 cm of clearance).

1. Power Down the Unit:

• Turn off the unit using the remote or control panel.
• If the unit is connected via internal wall wiring, safely use your home’s switchboard to power down the circuit supplying electricity to the Daikin unit.

1. Restart the System:

• Leave the system powered off for 20–30 minutes to allow it to cool down.
• Restore power via the switchboard and turn the unit back on.

If the L4 error persists after these steps, do not attempt further troubleshooting, as the issue could involve sensitive electrical components or require thermistor replacement. Please don’t hesitate to ‘contact us’ or give us a free call on 1300 730 896 so we can organise a technician to assist you in resolving the error if the issue persists.

L5 Error Code

Error Description:

The L5 error code on a Daikin air conditioning unit indicates an inverter instantaneous overcurrent (DC output). This issue may arise due to a defective compressor coil, such as wiring disconnection or insulation failure, a compressor startup failure (mechanical lock), or a defective inverter PCB. It typically originates from the outdoor unit.

Need for a Technician:

Yes, resolving the L5 error requires a trained HVAC technician. Diagnosing this issue involves testing the compressor coil, checking for mechanical faults, and assessing the inverter PCB’s electrical integrity. These tasks require specialised equipment and expertise to ensure safe and accurate resolution.

Remedies for Untrained End-Users:

Although professional intervention is necessary for resolving the L5 error, you can take the following preliminary steps to ensure the issue is not due to external or simple factors:

1. Power Down the Unit:

• Turn off the unit using the remote or control panel.
• If the unit is connected via internal wall wiring, safely use your home’s switchboard to power down the circuit supplying electricity to the Daikin unit.

1. Inspect for External Factors:

• Check the outdoor unit for any visible signs of damage, debris, or loose wiring (do not touch or attempt repairs).
• Ensure the unit is not exposed to extreme temperatures or weather conditions that might affect its performance.

1. Restart the Unit:

• After powering down, leave the system off for 20–30 minutes to allow it to reset.
• Turn the circuit back on via the switchboard and restart the air conditioner.

If the L5 error persists after these steps, the issue likely involves internal electrical or mechanical components and will require professional repair. Please don’t hesitate to ‘contact us’ or give us a free call on 1300 730 896 so we can organise a technician to assist you in resolving the error if the issue persists.

L6 Error Code

Error Description:

The L6 error code on a Daikin air conditioning unit indicates an inverter instantaneous overcurrent (AC output). This issue may result from an overcharge of refrigerant, shortage of power supply capacity, a defective compressor, or a faulty inverter unit. This error is generally associated with the outdoor unit.

Need for a Technician:

Yes, resolving the L6 error requires a trained HVAC technician. The technician will need to assess the compressor’s functionality, inspect the refrigerant charge, and test the inverter unit’s electrical components. These tasks involve specialised tools and expertise to avoid further damage to the system.

Remedies for Untrained End-Users:

While professional diagnosis and repair are necessary, you can take the following safe steps before calling for service:

1. Power Down the Unit:

• Turn off the unit using the remote or control panel.
• If the unit is connected via internal wall wiring, safely use your home’s switchboard to power down the circuit supplying electricity to the Daikin unit.

1. Inspect for External Factors:

• Ensure the outdoor unit is not blocked by debris or objects that may restrict airflow.
• Check if the unit is exposed to abnormal environmental factors, such as power surges or temperature extremes.

1. Restart the Unit:

• Wait for 20–30 minutes after powering down to allow the unit to reset.
• Turn the circuit back on via the switchboard and restart the air conditioner.

If the L6 error reappears, this indicates an internal fault that requires professional servicing. Please don’t hesitate to ‘contact us’ or give us a free call on 1300 730 896 so we can organise a technician to assist you in resolving the error if the issue persists.

L8 Error Code

Error Description:

The L8 error code on a Daikin air conditioning unit indicates a malfunction of overcurrent in the inverter compressor. This error typically originates from the outdoor unit and may be caused by a compressor overload, wiring disconnection in the compressor coil, disconnection of compressor wiring, or a defective inverter PCB.

Need for a Technician:

Yes, resolving the L8 error requires a trained HVAC technician. The issue involves diagnosing electrical connections, testing the compressor’s load conditions, and potentially replacing the inverter PCB, all of which require specialised tools and expertise to ensure safety and system integrity.

Remedies for Untrained End-Users:

While professional servicing is necessary for this error, you can try the following steps before scheduling a technician:

1. Power Down the Unit:

• Turn off the unit using the remote or control panel.
• If the unit is connected via internal wall wiring, safely use your home’s switchboard to power down the circuit supplying electricity to the Daikin unit.

1. Inspect for External Factors:

• Check that the outdoor unit is not obstructed by debris, which might force the compressor to overwork.
• Ensure there are no visible physical damages, such as broken wires near the outdoor unit.

1. Restart the Unit:

• Wait 20–30 minutes after turning off the power to allow the system to reset.
• Switch the circuit back on via the switchboard and restart the air conditioner.

If the error persists after restarting, it indicates a deeper issue requiring professional repair. Please don’t hesitate to ‘contact us’ or give us a free call on 1300 730 896 so we can organise a technician to assist you in resolving the error if the issue persists.

L9 Error Code

Error Description:

The L9 error code on a Daikin air conditioning unit indicates a malfunction of inverter compressor startup due to stall prevention. This issue typically originates from the outdoor unit and may be caused by a closed stop valve, defective compressor, incorrect wire connections to the compressor, large differential pressure before startup, or a defective inverter PCB.

Need for a Technician:

Yes, resolving the L9 error requires a trained HVAC technician. The error involves diagnosing complex components such as the compressor, valve operation, and inverter PCB, which necessitate advanced tools and expertise to prevent further damage to the system.

Remedies for Untrained End-Users:

Although the error requires professional servicing, you can perform the following preliminary steps:

1. Power Down the Unit:

• Turn off the air conditioning unit using the remote or control panel.
• If the unit is connected via internal wall wiring, safely use your home’s switchboard to power down the circuit supplying electricity to the Daikin unit.

1. Inspect for External Obstructions:

• Check the outdoor unit for any visible obstructions or debris that might affect airflow or valve movement.
• Confirm that the stop valve near the outdoor unit is not visibly damaged or blocked (do not attempt to adjust the valve yourself).

1. Restart the Unit:

• Wait for at least 20–30 minutes after turning off the power to allow the system to reset.
• Switch the circuit back on via the switchboard and restart the unit.

If the error code reappears, professional intervention is necessary. Please don’t hesitate to ‘contact us’ or give us a free call on 1300 730 896 so we can organise a technician to assist you in resolving the error if the issue persists.

LA Error Code

Error Description:

The LA error code on a Daikin air conditioning unit indicates a malfunction of the power transistor in the outdoor unit. This issue may be caused by a defective power transistor, faulty compressor, or a defective inverter PCB.

Need for a Technician:

Yes, resolving the LA error requires a trained HVAC technician. Diagnosing and repairing power transistor issues involves advanced tools to test electrical components, ensuring proper operation of the compressor and inverter PCB.

Remedies for Untrained End-Users:

While this error requires professional servicing, the following steps can help verify if the issue is persistent:

1. Power Down the Unit:

• Turn off the unit using the remote control or wall panel.
• If the unit is connected via internal wall wiring, safely use your home’s switchboard to power down the circuit supplying electricity to the Daikin unit.

1. Inspect for External Factors:

• Check for visible damage or obstruction near the outdoor unit that could interfere with its operation, such as debris or overheating.

1. Restart the Unit:

• After powering down the unit, wait for 20–30 minutes to allow the system to reset.
• Restore power at the switchboard and restart the unit.

If the LA error reappears, avoid further troubleshooting to prevent additional damage. Please don’t hesitate to ‘contact us’ or give us a free call on 1300 730 896 so we can organise a technician to assist you in resolving the error if the issue persists.

LC Error Code

Error Description:

The LC error code on a Daikin air conditioning unit signifies a malfunction in the communication between the control PCB and the inverter PCB. This issue could stem from a defective connection, external interference such as electrical noise, a faulty inverter compressor, or a problem with the control PCB’s transmission block. This error typically originates in the outdoor unit.

Need for a Technician:

Yes, resolving the LC error code requires a trained HVAC technician. The communication malfunction involves intricate wiring and signal transmission between critical components, which need to be inspected and tested using specialised tools. Additionally, external factors like electrical interference must be ruled out, requiring expertise.

Remedies for Untrained End-Users:

While the underlying cause of the LC error requires professional intervention, you can perform these simple steps to rule out transient issues or temporary disruptions:

1. Power Down the Unit:

• Turn off the air conditioner using the remote control or wall panel.
• If the unit is connected via internal wall wiring, safely use your home’s switchboard to power down the circuit supplying electricity to the Daikin unit.

1. Check for External Interference:

• Inspect for sources of electrical noise near the unit, such as high-power appliances or devices emitting electromagnetic interference, and move them if possible.

1. Restart the Unit:

• After powering down, wait for 30 minutes to allow the system to reset. Then, restore power at the switchboard and turn the air conditioner back on to see if the error clears.

If the LC error code reappears, avoid further troubleshooting to prevent potential damage to the control PCB or inverter PCB. Please don’t hesitate to ‘contact us’ or give us a free call on 1300 730 896 so we can organise a technician to assist you in resolving the error if the issue persists.

M1 Error Code

Error Description:

The M1 error code on a Daikin air conditioning unit indicates a malfunction of the central remote controller PCB. This issue may arise due to a defective central remote controller PCB or communication issues affecting the controller’s functionality. It typically originates from the central control system.

Need for a Technician:

Yes, resolving the M1 error requires a trained HVAC technician. Diagnosing this issue involves testing the central remote controller PCB for faults and verifying the communication pathways. These tasks require specialised tools and expertise to accurately identify and resolve the root cause.

Remedies for Untrained End-Users:

Although professional intervention is necessary to resolve the M1 error, you can take the following preliminary steps to rule out simple issues or external factors:

1. Power Down the Unit:

• Turn off the unit using the remote or control panel.
• If the unit is connected via internal wall wiring, safely use your home’s switchboard to power down the circuit supplying electricity to the Daikin unit.

1. Check the Central Remote Controller:

• Inspect the controller for loose wiring connections, physical damage, or signs of wear (do not attempt repairs yourself).
• Ensure the central remote controller is receiving power and is not subject to electrical interference.

1. Restart the Unit:

• After powering down, leave the system off for 20–30 minutes to allow it to reset.
• Turn the circuit back on via the switchboard and restart the air conditioner.

If the M1 error persists after these steps, the issue is likely due to internal faults in the central remote controller PCB or communication system. Please don’t hesitate to ‘contact us’ or give us a free call on 1300 730 896 so we can organise a technician to assist you in resolving the error.

M8 Error Code

Error Description:

The M8 error code on a Daikin air conditioning unit signifies a malfunction in the transmission between optional controllers used for centralized control. This issue can occur due to power disconnection to the centralized control system, a reset switch being activated, defective transmission wiring, or an incorrect address configuration for the central remote controller.

Need for a Technician:

Yes, resolving the M8 error requires a trained HVAC technician. Diagnosing this issue involves verifying the communication wiring integrity, inspecting central control power connections, and checking the address configuration of the centralized control system. These tasks demand specific tools and expertise to restore functionality safely and effectively.

Remedies for Untrained End-Users:

Although professional intervention is recommended to resolve the M8 error, you can perform the following basic checks to rule out external factors or simple configuration issues:

1. Power Down the Unit:

• Turn off the unit using the remote or control panel.
• If the unit is connected via internal wall wiring, safely use your home’s switchboard to power down the circuit supplying electricity to the Daikin unit.

1. Inspect the Centralized Control System:

• Ensure all controllers are securely connected to their power sources and are powered on.
• Check that the centralized control reset switch is in the correct position (not engaged) and no inadvertent resets have been triggered.

1. Check Transmission Connections:

• Look for visible damage, loose connections, or disconnections in the transmission wiring linking optional controllers (do not attempt repairs yourself).
• Verify that no recent changes have been made to the address settings of the central remote controller.

1. Restart the Unit:

• Leave the system powered off for 20–30 minutes to allow it to reset fully.
• Turn the circuit back on via the switchboard and restart the air conditioner.

If the M8 error persists after these steps, it may indicate an internal fault or wiring issue requiring professional expertise. Please don’t hesitate to ‘contact us’ or give us a free call on 1300 730 896 so we can organise a technician to assist you in resolving the error.

MA Error Code

Error Description:

The MA error code on a Daikin air conditioning unit indicates an improper combination of optional controllers for centralized control. This issue may arise if more than one master controller is connected, faulty settings have been applied in the centralized control system, or there is a defect in the centralized control components. It is specifically related to the centralized control system and does not originate from the indoor or outdoor units.

Need for a Technician:

Yes, resolving the MA error code typically requires the expertise of a trained HVAC technician. Diagnosing this issue involves checking the configuration of the centralized control system, ensuring that only one master controller is configured, and verifying the integrity of the transmission wiring and settings. These tasks require specialized tools and knowledge of Daikin’s centralized control systems.

Remedies for Untrained End-Users:

While professional assistance is often necessary, you can try the following safe steps to rule out minor issues before contacting a technician:

1. Power Down the Unit:

• Turn off the air conditioning unit using the remote or control panel.
• If the unit is connected via internal wall wiring, safely use your home’s switchboard to power down the circuit supplying electricity to the Daikin unit.

1. Inspect for Faulty Settings:

• Check the settings on the centralized controller to ensure only one master controller is configured. Do not attempt to adjust advanced settings unless you have the user manual for the controller.

1. Restart the System:

• Allow the system to remain powered off for 20–30 minutes to reset.
• Turn the circuit back on via the switchboard and restart the air conditioner to see if the error clears.

If the MA error persists after following these steps, the issue likely involves faulty wiring, configuration errors, or defects in the centralized control system. Please don’t hesitate to ‘contact us’ or give us a free call on 1300 730 896 so we can organise a technician to assist you in resolving the error.

MC Error Code

Error Description:

The MC error code on a Daikin air conditioning unit indicates address duplication or improper setting in the central remote controller. This occurs when two or more devices in the system are assigned the same address, causing a conflict within the centralized control system. This issue originates from the centralized controller and is not related to the indoor or outdoor units.

Need for a Technician:

Yes, resolving the MC error code requires a trained HVAC technician. Diagnosing this issue involves verifying and reconfiguring the address settings in the centralized controller system to ensure no duplication. Technicians have access to specialized tools and manuals necessary for accessing and resolving these settings without causing further disruptions to the system.

Remedies for Untrained End-Users:

Although professional assistance is recommended, you can perform the following basic checks to eliminate minor issues before contacting a technician:

1. Power Down the Unit:

• Turn off the air conditioning system using the remote or control panel.
• If the system is connected via internal wall wiring, safely use your home’s switchboard to power down the circuit supplying electricity to the Daikin unit.

1. Inspect the Controller Settings:

• Review the centralized controller for any visible errors or notifications about duplicated addresses. If the system allows, reset the controller settings to the factory default, but avoid making advanced adjustments.

1. Restart the System:

• Allow the system to remain powered off for 20–30 minutes to clear temporary errors.
• Turn the circuit back on via the switchboard and restart the air conditioner to see if the error resolves.

If the MC error persists after performing these steps, it likely involves an advanced configuration issue that requires professional attention. Please don’t hesitate to ‘contact us’ or give us a free call on 1300 730 896 so we can organise a technician to assist you in resolving the error.

P0 Error Code

Error Description:

The P0 error code on a Daikin air conditioning unit typically indicates a shortage of refrigerant in the system or an issue related to refrigerant circulation. This could be due to a shortage of refrigerant, clogged refrigerant piping, or other obstructions affecting refrigerant flow. This issue generally originates from the outdoor unit.

Need for a Technician:

Yes, resolving the P0 error requires a trained HVAC technician. Diagnosing this issue involves checking the refrigerant levels, identifying potential leaks, and inspecting for blockages or obstructions in the refrigerant piping. These tasks require specialised equipment and the expertise of a licensed professional to ensure the system is handled safely and recharged properly if necessary.

Remedies for Untrained End-Users:

Although professional intervention is necessary to resolve the P0 error, you can perform the following preliminary steps to rule out external factors before calling a technician:

1. Power Down the Unit:

• Turn off the unit using the remote or control panel.
• If the unit is connected via internal wall wiring, safely use your home’s switchboard to power down the circuit supplying electricity to the Daikin unit.

1. Inspect for External Factors:

• Check the outdoor unit for any visible signs of damage, debris, or obstructions around the vents that might impact airflow.
• Ensure the area around the outdoor unit is clear and free from any objects that might restrict its operation.

1. Restart the Unit:

• After powering down, leave the system off for 20–30 minutes to allow it to reset.
• Turn the circuit back on via the switchboard and restart the air conditioner.

If the P0 error persists after these steps, it is likely due to a refrigerant-related issue or clogged piping, which requires professional repair. Please don’t hesitate to ‘contact us’ or give us a free call on 1300 730 896 so we can organise a technician to assist you in resolving the error if the issue persists.

P1 Error Code

Error Description:

The P1 error code on a Daikin air conditioning unit indicates a power voltage imbalance or an issue with the inverter PCB. This error may be caused by an open phase, interphase voltage imbalance, a defective capacitor in the main circuit, faulty wiring, or a malfunctioning inverter PCB. The issue typically originates from the outdoor unit.

Need for a Technician:

Yes, resolving the P1 error requires a trained HVAC technician. Diagnosing this issue involves assessing the main circuit for voltage imbalances, checking capacitors for damage or failure, and inspecting the inverter PCB and wiring for faults. These tasks require specialised electrical tools and knowledge to perform safely and accurately.

Remedies for Untrained End-Users:

Although resolving the P1 error necessitates professional intervention, you can take the following preliminary steps to rule out external or simple factors:

1. Power Down the Unit:

• Turn off the unit using the remote or control panel.
• If the unit is connected via internal wall wiring, safely use your home’s switchboard to power down the circuit supplying electricity to the Daikin unit.

1. Inspect for External Factors:

• Check for visible signs of power supply disruptions, such as a tripped circuit breaker or a power outage.
• Inspect electrical connections for any visible damage, disconnection, or loose wiring (do not attempt to fix any issues you identify).

1. Restart the Unit:

• Leave the unit powered off for 20–30 minutes to allow it to reset.
• Turn the circuit back on via the switchboard and restart the air conditioner.

If the P1 error persists after completing these steps, the problem is likely internal and requires professional repair. Please don’t hesitate to ‘contact us’ or give us a free call on 1300 730 896 so we can organise a technician to assist you in resolving the error if the issue persists.

P2 Error Code

Error Description:

The P2 error code on a Daikin air conditioning unit indicates an automatic refrigerant charge operation has stopped. This issue can occur if the refrigerant tank valve is closed, the stop valve is not opened, or if there is a malfunction during the charging process. The error typically originates from the outdoor unit.

Need for a Technician:

Yes, resolving the P2 error requires a trained HVAC technician. Diagnosing this issue involves inspecting the refrigerant system, including the stop valve and refrigerant tank, to ensure they are functioning correctly. It may also require verifying the unit’s automatic charging operation. This process necessitates specialised tools, such as refrigerant gauges, and knowledge of safe refrigerant handling procedures.

Remedies for Untrained End-Users:

While resolving the P2 error involves technical expertise, you can perform the following simple steps to ensure no external or operational issues are causing the error:

1. Power Down the Unit:

• Turn off the unit using the remote or control panel.
• If the unit is connected via internal wall wiring, safely use your home’s switchboard to power down the circuit supplying electricity to the Daikin unit.

1. Inspect for External Factors:

• Ensure the refrigerant tank valve (if accessible) is open and not obstructed.
• Verify that the outdoor unit is not physically blocked or obstructed by debris, which might impact its operation. Avoid touching the stop valve or refrigerant tank if unsure of how to handle them safely.

1. Restart the Unit:

• After powering the unit down, leave it off for 20–30 minutes to reset.
• Turn the circuit back on using the switchboard and restart the air conditioner to see if the error clears.

If the P2 error persists after performing these steps, professional intervention is required as the issue may involve the refrigerant system, which requires specialised handling. Please don’t hesitate to ‘contact us’ or give us a free call on 1300 730 896 so we can organise a technician to assist you in resolving the error if the issue persists.

P3 Error Code

Error Description:

The P3 error code on a Daikin air conditioning unit indicates a malfunction of the thermistor in the switch box. This issue can arise from a defective thermistor connection, a malfunctioning reactor thermistor, or a fault in the inverter PCB. It typically originates from the outdoor unit, as the switch box is integral to the outdoor system’s operation.

Need for a Technician:

Yes, resolving the P3 error requires a trained HVAC technician. Diagnosing and addressing the issue involves testing the thermistor’s resistance, inspecting the reactor thermistor and its connections, and potentially replacing the inverter PCB if it is defective. These tasks require specialised tools and knowledge of electrical and refrigeration systems.

Remedies for Untrained End-Users:

As this error pertains to internal electrical components, there are no user-serviceable remedies. However, you can perform the following safe checks:

1. Power Down the Unit:

• Turn off the unit using the remote or control panel.
• If the unit is connected via internal wall wiring, safely use your home’s switchboard to power down the circuit supplying electricity to the Daikin unit.

1. Check for External Issues:

• Ensure the outdoor unit is clean and free from obstructions like leaves, dirt, or debris, as these can occasionally exacerbate errors.

1. Restart the Unit:

• Leave the unit powered off for 20–30 minutes to allow it to reset.
• Restore power using the switchboard and turn the air conditioner back on to see if the error persists.

If the P3 error continues after these steps, professional assistance is required to inspect and repair the thermistor, reactor, or inverter PCB. Please don’t hesitate to ‘contact us’ or give us a free call on 1300 730 896 so we can organise a technician to assist you in resolving the error if the issue persists.

P4 Error Code

Error Description:

The P4 error code on a Daikin air conditioning unit indicates a malfunction of the radiation fin temperature sensor, typically located in the outdoor unit. This error is caused by a defective radiation fin temperature thermistor, a fault in the inverter PCB, a malfunctioning inverter compressor, or a defective fan motor.

Need for a Technician:

Yes, resolving the P4 error requires a trained HVAC technician. Diagnosing this issue involves specialised testing of the radiation fin thermistor’s functionality, inspecting the inverter PCB for faults, and verifying the operational integrity of the compressor and fan motor. These tasks require professional tools and expertise to avoid further damage to the system.

Remedies for Untrained End-Users:

Although the internal components require a professional, you can perform the following safe checks:

1. Power Down the Unit:

• Turn off the unit using the remote or control panel.
• If the unit is connected via internal wall wiring, safely use your home’s switchboard to power down the circuit supplying electricity to the Daikin unit.

1. Check for External Obstructions:

• Ensure the outdoor unit is free from debris such as dirt, leaves, or other blockages around the fan and fins, as these can indirectly affect the thermistor’s readings.

1. Restart the Unit:

• After leaving the system powered off for 20–30 minutes, restore power using the switchboard and turn the air conditioner back on to check if the error persists.

If the P4 error continues to display after these steps, professional assistance is required to inspect and repair the thermistor, inverter PCB, or other components. Please don’t hesitate to ‘contact us’ or give us a free call on 1300 730 896 so we can organise a technician to assist you in resolving the error if the issue persists.

P8 Error Code

Error Description:

The P8 error code on a Daikin air conditioning unit indicates that the system has activated heat exchanger freezing protection during an automatic refrigerant charging operation. This error typically occurs in the outdoor unit when the system detects conditions that could cause the heat exchanger to freeze.

Need for a Technician:

Yes, resolving the P8 error requires a trained HVAC technician. The error involves the refrigerant system, and diagnosing the root cause may require pressure testing, inspecting the heat exchanger, and verifying the refrigerant levels and charging process. These procedures necessitate specialised tools and knowledge to ensure system safety and proper functionality.

Remedies for Untrained End-Users:

While the refrigerant system should be handled only by professionals, you can perform the following checks:

1. Power Down the Unit:

• Turn off the unit using the remote control or main panel.
• If the unit is connected via internal wall wiring, safely use your home’s switchboard to power down the circuit supplying electricity to the Daikin unit.

1. Check for External Factors:

• Ensure the outdoor unit is free from obstructions like dirt, ice, or debris that might impede airflow or contribute to freezing conditions.

1. Restart the Unit:

• Allow the system to remain powered off for 30 minutes before turning it back on. Use the switchboard to restore power and observe whether the error reappears.

If the P8 error persists after these steps, professional intervention is necessary to inspect the refrigerant system and resolve the underlying issue. Please don’t hesitate to ‘contact us’ or give us a free call on 1300 730 896 so we can organise a technician to assist you in resolving the error if the issue persists.

P9 Error Code

Error Description:

The P9 error code on a Daikin air conditioning unit indicates a malfunction of the fan motor in the humidifier unit. This issue typically originates from the indoor unit and is caused by a defective fan motor, broken relay harness, defective connector contact, or an issue with the outdoor unit PCB.

Need for a Technician:

Yes, resolving the P9 error requires a trained HVAC technician. Diagnosing and repairing fan motor malfunctions or relay harness issues involves disassembling parts of the unit, testing electrical continuity, and potentially replacing components. These tasks require specialised tools and expertise to ensure safety and correct operation.

Remedies for Untrained End-Users:

While the issue will likely need professional intervention, you can try the following steps:

1. Power Down the Unit:

• Turn off the unit using the remote control or main panel.
• If the unit is connected via internal wall wiring, safely use your home’s switchboard to power down the circuit supplying electricity to the Daikin unit.

1. Check for External Obstructions:

• Inspect the unit’s external vents and fan area to ensure they are not blocked by debris, dust, or other obstructions that might impede airflow.

1. Restart the Unit:

• Leave the unit powered off for at least 30 minutes. Then restore power at the switchboard and turn the system back on to check if the error persists.

If the P9 error reappears after restarting the system, the fan motor or associated wiring likely requires professional repair. Please don’t hesitate to ‘contact us’ or give us a free call on 1300 730 896 so we can organise a technician to assist you in resolving the error if the issue persists.

PA Error Code

Error Description:

The PA error code on a Daikin air conditioning unit indicates an issue related to the refrigerant cylinder during automatic refrigerant charging. This can be caused by an empty refrigerant cylinder in the master unit or a broken wire in the heater (for a humidifier unit), defective heater components, a malfunctioning thermistor, or a defective outdoor unit PCB. The source of the issue is typically the outdoor unit.

Need for a Technician:

Yes, resolving the PA error requires a trained HVAC technician. Diagnosing the root cause involves checking refrigerant levels, inspecting the wiring and connections of the heater or thermistor, and potentially testing or replacing components like the outdoor unit PCB. These tasks require specialised tools and expertise to ensure the system functions correctly and safely.

Remedies for Untrained End-Users:

While most causes of the PA error need professional intervention, you can take the following preliminary steps:

1. Power Down the Unit:

• Turn off the air conditioning system using the remote control or the main control panel.
• If the unit is connected via internal wall wiring, safely use your home’s switchboard to power down the circuit supplying electricity to the Daikin unit.

1. Check Refrigerant Cylinder (if accessible):

• If you are using an external refrigerant cylinder for charging, confirm it is not empty. If it is, replace it with a properly filled cylinder. Ensure you handle refrigerants safely and in compliance with local regulations.

1. Restart the Unit:

• Wait at least 30 minutes before restoring power at the switchboard. Once powered, turn the system back on to check if the error persists.

If the PA error persists after performing the steps above, the issue likely involves faulty wiring, a defective heater, or thermistor components that require professional diagnosis and repair. Please don’t hesitate to ‘contact us’ or give us a free call on 1300 730 896 so we can organise a technician to assist you in resolving the error.

PC Error Code

Error Description:

The PC error code on a Daikin air conditioning unit indicates an issue with the refrigerant cylinder during automatic refrigerant charging. Specifically, it signifies that the refrigerant cylinder in Slave Unit 2 is empty. This error originates from the outdoor unit and affects the system’s ability to properly complete the refrigerant charging process.

Need for a Technician:

Yes, resolving the PC error requires a trained HVAC technician. Identifying and rectifying refrigerant cylinder issues involves inspecting the refrigerant system, verifying connections, and potentially refilling or replacing refrigerant cylinders. Proper handling of refrigerants is essential to ensure safety and compliance with environmental regulations.

Remedies for Untrained End-Users:

While professional assistance is necessary to fully resolve this error, you can perform the following steps to rule out simple issues:

1. Power Down the Unit:

• Turn off the air conditioning system using the remote control or main control panel.
• If the unit is connected via internal wall wiring, safely use your home’s switchboard to power down the circuit supplying electricity to the Daikin unit.

1. Check the Refrigerant Cylinder:

• If you have direct access to Slave Unit 2’s refrigerant cylinder (typically for larger systems or maintenance scenarios), ensure it is not empty. If empty, contact a technician for a refill or replacement.

1. Restart the Unit:

• Wait at least 30 minutes before restoring power at the switchboard. Once powered, turn the system back on to see if the error persists.

If the PC error remains unresolved after these steps, the issue may require professional diagnostics to assess refrigerant levels, system pressures, and cylinder conditions. Please don’t hesitate to ‘contact us’ or give us a free call on 1300 730 896 so we can organise a technician to assist you in resolving the error.

PE Error Code

Error Description:

The PE error code on a Daikin air conditioning unit signifies that the automatic refrigerant charge operation is nearly completed. This code typically appears during the refrigerant charging process and indicates that the system is approaching the final stages of this operation. It is associated with the outdoor unit during maintenance or setup procedures.

Need for a Technician:

No, this error code does not necessarily indicate a fault that requires a professional HVAC technician. It is a system status notification rather than a critical error. However, if this code persists unexpectedly or interrupts regular operation, it is advisable to consult a technician to verify the refrigerant levels and ensure the charging process was successful.

Remedies for Untrained End-Users:

If the system is functioning as expected, the PE code does not require immediate action. However, to ensure the unit is operating optimally:

1. Power Down the Unit (if needed):

• If the unit remains in this state for an extended period or appears unresponsive:
  • Turn off the air conditioning system using the remote control or main control panel.
  • If the unit is connected via internal wall wiring, safely use your home’s switchboard to power down the circuit supplying electricity to the Daikin unit.

1. Restart the Unit:

• Wait at least 30 minutes before restoring power at the switchboard. Turn the system back on and monitor for any further issues.

1. Check System Operation:

• Verify that the air conditioning unit is cooling or heating as expected and that no other error codes are displayed.

If the PE error persists or the unit does not operate correctly after performing the above steps, a technician may be needed to assess the refrigerant charging process or check for related system issues, in which case, Please don’t hesitate to ‘contact us’ or give us a free call on 1300 730 896 so we can organise a technician to assist you.

PH Error Code

Error Description:

The PH error code on a Daikin air conditioning unit indicates an issue related to the refrigerant cylinder during automatic refrigerant charging. This could involve a malfunction of the heater unit, a defective connector contact, a faulty thermistor, or a potential problem with the outdoor unit’s PCB. This error typically originates from the outdoor unit.

Need for a Technician:

Yes, resolving the PH error code requires a trained HVAC technician. The error is often related to components such as the heater unit or thermistor, which involve electrical connections and precise diagnostics. A technician will need to test and verify the integrity of the components and wiring, as well as the refrigerant charging process.

Remedies for Untrained End-Users:

For end-users, there are limited steps that can be safely performed:

1. Check for Obstructions:

• Ensure that the area around the outdoor unit is clear of debris or physical obstructions that could affect its operation.

1. Power Down the Unit:

• Turn off the system using the remote control or the main control panel.
• If the unit is connected via internal wall wiring, safely use your home’s switchboard to power down the circuit supplying electricity to the Daikin unit.

1. Restart the System:

• Wait at least 30 minutes before restoring power at the switchboard. Turn the unit back on and check if the error persists.

1. Monitor for Further Issues:

• If the unit operates normally after restarting, no immediate action may be needed. However, if the PH error code reappears, professional intervention is necessary.

If the PH error persists or the unit does not resume normal operation, it is important to have a professional HVAC technician inspect and address the issue. Please don’t hesitate to ‘contact us’ or give us a free call on 1300 730 896 so we can organise a technician to assist you.

PJ Error Code

Error Description:

The PJ error code on a Daikin air conditioning unit indicates a malfunction related to the capacity setting of the outdoor unit PCB. This can result from an improper or missing capacity setting adaptor, a defective outdoor unit PCB, or mismatched settings or components after a replacement or repair of the unit’s main PCB.

Need for a Technician:

Yes, resolving the PJ error code requires a trained HVAC technician. The issue involves verifying and potentially resetting or replacing components like the capacity setting adaptor or outdoor unit PCB. These tasks require technical expertise and specialised tools to ensure compatibility and proper functionality.

Remedies for Untrained End-Users:

While the PJ error code typically requires professional intervention, you can take the following basic steps:

1. Inspect for Installation Issues:

• Ensure no external components or connectors appear loose or improperly installed on the outdoor unit. Avoid attempting any internal repairs or adjustments.

1. Power Down the Unit:

• Turn off the unit using the remote control or main control panel.
• If the unit is connected via internal wall wiring, safely use your home’s switchboard to power down the circuit supplying electricity to the Daikin unit.

1. Restart the System:

• Wait at least 30 minutes, then restore power at the switchboard. Turn the system back on and monitor for the PJ error code.

1. Contact Professional Support if Needed:

• If the error persists, professional service is necessary to adjust settings, install the appropriate adaptor, or replace defective components.

If the PJ error code reappears or the unit fails to function correctly after restarting, it is important to contact a professional HVAC technician to diagnose and resolve the issue. Please don’t hesitate to ‘contact us’ or give us a free call on 1300 730 896 so we can organise a technician to assist you.

U0 Error Code

Error Description:

The U0 error code on a Daikin air conditioning unit signifies a shortage of refrigerant or issues with refrigerant flow. This may be caused by insufficient refrigerant levels, refrigerant clogging due to incorrect piping, or component malfunctions such as a defective thermistor, low-pressure sensor, or outdoor unit main PCB.

Need for a Technician:

Yes, resolving the U0 error code requires a trained HVAC technician. Handling refrigerant and diagnosing related flow or pressure issues necessitate specialised tools and expertise to safely assess for leaks, blockages, or component failures. Proper refrigerant handling must comply with strict environmental and safety standards.

Remedies for Untrained End-Users:

While the U0 error code often involves technical repairs, you can take the following safe, preliminary steps:

1. Inspect the Outdoor Unit:

• Check for any visible damage or obstruction around the outdoor unit’s piping or connections. Ensure there are no blockages from debris or kinks in exposed pipes.

1. Power Down the Unit:

• Turn off the air conditioning unit using its remote control or the control panel.
• If the unit is connected via internal wall wiring, safely use your home’s switchboard to power down the circuit supplying electricity to the Daikin unit.

1. Restart the System:

• After waiting for at least 30 minutes, restore power via the switchboard and turn the unit back on. Observe whether the error persists.

1. Avoid Overuse:

• If the error persists, avoid running the unit to prevent further strain on its components or refrigerant system.

If the U0 error remains unresolved after restarting the system, it is important to seek professional assistance to address refrigerant levels or identify faulty components. Please don’t hesitate to ‘contact us’ or give us a free call on 1300 730 896 so we can organise a technician to assist you.

U1 Error Code

Error Description:

The U1 error code on a Daikin air conditioning unit indicates a reverse phase or open phase in the power supply. This issue often occurs in units connected to three-phase power supplies and is caused by incorrect wiring of the power phases, a loss of one phase, or a defect in the outdoor unit’s PCB (A1P).

Need for a Technician:

Yes, resolving the U1 error code requires a trained HVAC technician. Diagnosing and correcting power supply issues involves specialised tools to test the phase connections, reverse polarity, and the condition of the outdoor unit PCB. Attempting to address these issues without proper training may result in electrical hazards or further damage to the system.

Remedies for Untrained End-Users:

While the resolution of this error requires professional assistance, you can take the following safe steps:

1. Power Down the Unit:

• Turn off the air conditioning unit using its remote control or control panel.
• If the unit is connected via internal wall wiring, safely use your home’s switchboard to power down the circuit supplying electricity to the Daikin unit.

1. Inspect the Power Supply:

• If accessible, ensure the power supply to the unit has not been interrupted (e.g., by a tripped circuit breaker). Do not attempt to handle or test electrical wiring.

1. Restart the System:

• Restore power to the unit via the switchboard and turn the unit back on to see if the error clears. If the error persists, avoid further use to prevent additional strain or damage.

If the U1 error remains unresolved, it is essential to have a qualified technician inspect the wiring, power phases, and the outdoor unit PCB for potential faults. Please don’t hesitate to ‘contact us’ or give us a free call on 1300 730 896 so we can organise a technician to assist you.

U2 Error Code

Error Description:

The U2 error code on a Daikin air conditioning unit indicates a power supply malfunction or instantaneous power failure, which can result from abnormal power supply voltage, an electrical surge, or defective main circuit wiring. This issue typically originates in the outdoor unit and may affect the system’s ability to function correctly.

Need for a Technician:

Yes, resolving the U2 error requires a trained HVAC technician. Diagnosing power supply issues involves inspecting the unit’s main circuit wiring, testing voltage levels, and ensuring the system is receiving stable power. These tasks require specialised tools and knowledge to avoid potential electrical hazards.

Remedies for Untrained End-Users:

While a professional is needed for full resolution, you can safely perform the following steps to rule out simple external issues:

1. Check for Power Interruptions:

• Verify if there have been recent power outages, fluctuations, or surges in your area that could have triggered the error.

1. Power Down the Unit:

• Turn off the air conditioning unit using its remote control or control panel.
• If the unit is connected via internal wall wiring, safely use your home’s switchboard to power down the circuit supplying electricity to the Daikin unit.

1. Inspect Circuit Breakers:

• Check if the circuit breaker associated with the unit has tripped. Reset it if necessary, but avoid repeated resets, as this may indicate a more severe electrical problem.

1. Restart the System:

• After waiting for a few minutes, restore power via the switchboard and turn the unit back on to see if the error clears. If it persists, cease further use to prevent system damage.

If the U2 error remains unresolved, it is critical to have a qualified technician examine the power supply and wiring for potential defects. Please don’t hesitate to ‘contact us’ or give us a free call on 1300 730 896 so we can organise a technician to assist you.

U3 Error Code

Error Description:

The U3 error code on a Daikin air conditioning unit indicates that a check operation was not executed or there was a transmission error during the initial system setup or operation. This issue can occur due to improper installation, incorrect wiring, or a failure to run the system check mode as part of commissioning. The problem typically originates in the outdoor unit, as it involves system-wide communication.

Need for a Technician:

Yes, resolving the U3 error requires a trained HVAC technician. The technician will need to perform diagnostic checks on the system setup, verify that all components are correctly connected and configured, and resolve any communication or wiring issues. Specialised tools and system knowledge are essential to complete these steps effectively and safely.

Remedies for Untrained End-Users:

While a technician is needed for final resolution, you can try the following safe steps to ensure the issue is not caused by external factors:

1. Confirm the Installation Status:

• Check with the installer to verify if the system’s setup and check operation were completed as part of the commissioning process.

1. Power Down the Unit:

• Turn off the air conditioning unit using the remote control or control panel.
• If the unit is connected via internal wall wiring, safely use your home’s switchboard to power down the circuit supplying electricity to the Daikin unit.

1. Restart the System:

• After waiting a few minutes, restore power via the switchboard and turn the unit back on. Check if the error code reappears.

1. Inspect for Loose Connections:

• If accessible, visually inspect external connections for signs of looseness or damage. Do not attempt internal repairs.

If the U3 error persists, it is essential to have a technician inspect the system to ensure the check operation is executed and any wiring or communication issues are resolved. Please don’t hesitate to ‘contact us’ or give us a free call on 1300 730 896 so we can organise a technician to assist you.

U4 Error Code

Error Description:

The U4 error code on a Daikin air conditioning unit indicates a malfunction in the communication (transmission) between the indoor and outdoor units. This issue can result from a short circuit, incorrect or damaged wiring (specifically F1/F2 transmission lines), an outdoor unit power supply problem, mismatched system addresses, or defective control boards in the indoor or outdoor units.

Need for a Technician:

Yes, resolving the U4 error requires a trained HVAC technician. A technician is needed to:

• Perform diagnostic checks on the transmission lines (F1/F2).
• Inspect and repair any short circuits or wiring faults.
• Test the system addresses and rectify mismatches.
• Identify and replace faulty PCB components if necessary.

Specialised tools and system expertise are required to troubleshoot and resolve these technical issues without causing further damage to the unit.

Remedies for Untrained End-Users:

While a technician is essential for full resolution, you can attempt the following preliminary steps to rule out simple issues:

1. Verify Outdoor Unit Power Supply:

• Confirm that the outdoor unit has power. Check if the circuit breaker or outdoor unit switch is ON.

1. Power Down the Unit:

• Turn off the air conditioning unit using the remote control or control panel.
• If the unit is connected via internal wall wiring, safely use your home’s switchboard to power down the circuit supplying electricity to the Daikin unit.

1. Restart the System:

• Wait at least 5 minutes before turning the power back on via the switchboard. Then, restart the air conditioner and observe if the error code reappears.

1. Inspect for Visible Wiring Issues:

• If accessible, visually inspect the wiring connections for signs of damage, looseness, or improper wiring. Do not attempt repairs yourself.

If the U4 error persists, it’s important to have a technician diagnose the transmission system and address any wiring or component faults. Please don’t hesitate to ‘contact us’ or give us a free call on 1300 730 896 so we can organise a technician to assist you.

U5 Error Code

Error Description:

The U5 error code on a Daikin air conditioning unit indicates a communication (transmission) malfunction between the indoor unit and the remote controller. This issue could be caused by:

• Noise interference affecting the transmission.
• Incorrect connection when two remote controllers are used.
• Defective indoor unit PCB or remote controller PCB.

Need for a Technician:

Yes, resolving the U5 error code typically requires a trained HVAC technician. The technician is needed to:

• Diagnose the source of the communication issue, such as checking for interference or damaged wiring.
• Test and replace the indoor unit PCB or remote controller PCB if necessary.
• Verify proper configuration and installation when two remote controllers are in use.

Special tools and knowledge of Daikin systems are essential for identifying the exact fault and preventing further complications.

Remedies for Untrained End-Users:

While a technician is necessary for a full resolution, you can try these simple steps first:

1. Check Remote Controller Connections:

• Ensure that the remote controller is securely connected and its wiring is intact.

1. Remove Potential Interference:

• Remove or relocate devices or appliances near the air conditioning unit that may emit electrical noise, such as microwaves, routers, or cordless phones.

1. Power Down the Unit:

• Turn off the air conditioner using the remote control (if it still responds) or the control panel.
• If the unit is connected via internal wall wiring, safely use your home’s switchboard to power down the circuit supplying electricity to the Daikin unit.

1. Restart the System:

• Wait for at least 5 minutes before turning the power back on at the switchboard. Then, restart the system and check if the U5 error clears.

1. Inspect for Dual Remote Controller Setup:

• If two remote controllers are connected, ensure the configuration complies with Daikin’s specifications and that no duplication issues exist.

If the U5 error code persists after trying these steps, professional assistance is recommended to resolve the communication issue and repair any defective components. Please don’t hesitate to ‘contact us’ or give us a free call on 1300 730 896 so we can organise a technician to assist you.

U6 Error Code

Error Description:

The U6 error code on a Daikin air conditioning unit indicates a communication malfunction between indoor units. This issue may arise from:

• Faulty wiring connections between the units.
• External factors such as electrical noise interfering with communication signals.
• A defective indoor unit PCB.

Need for a Technician:

Yes, resolving the U6 error code requires a trained HVAC technician. A professional is needed to:

• Diagnose and repair wiring issues or replace damaged components.
• Identify and mitigate noise interference affecting the transmission signals.
• Test the indoor unit PCBs and replace them if they are defective.

Specialised tools and expertise are required to ensure proper communication between the units.

Remedies for Untrained End-Users:

While a technician is required for a permanent fix, you can try these basic steps to potentially resolve the issue:

1. Inspect Wiring Connections:

• Check for any visible damage or loose connections in the wiring between the indoor units. Ensure all wires are securely fastened.

1. Minimise Noise Interference:

• Move or turn off devices that may generate electrical noise, such as routers, cordless phones, or microwave ovens, near the units.

1. Power Down the Unit:

• Turn off the air conditioning system using the remote control or control panel.
• If the unit is connected via internal wall wiring, safely use your home’s switchboard to power down the circuit supplying electricity to the Daikin unit.

1. Restart the System:

• After powering down, wait for at least 5 minutes before turning the power back on at the switchboard. Restart the system and see if the error clears.

If the U6 error code persists after following these steps, a professional technician should be contacted to address the issue. Please don’t hesitate to ‘contact us’ or give us a free call on 1300 730 896 so we can organise a technician to assist you.

U7 Error Code

Error Description:

The U7 error code on a Daikin air conditioning unit indicates a transmission malfunction between outdoor units or between the outdoor unit and the external control adaptor. This may be caused by:

• Incorrect wiring connections between outdoor units.
• Defective or damaged transmission wirings.
• A faulty outdoor unit PCB.

Need for a Technician:

Yes, resolving the U7 error code requires a trained HVAC technician. A professional is needed to:

• Inspect and correct transmission wiring connections between outdoor units or external control adaptors.
• Test the communication system and replace faulty transmission cables or the outdoor unit PCB as needed.
• Use specialised tools to identify and fix the root cause without causing further damage.

Remedies for Untrained End-Users:

While a technician is essential for permanent repairs, you can perform the following checks and steps:

1. Inspect Wiring:

• Visually inspect the wiring between outdoor units for any obvious signs of damage or disconnection.
• Ensure that connectors are securely in place.

1. Reset the System:

• Turn off the air conditioning system using the remote control or control panel.

1. Power Down the Unit:

• If the unit is connected via internal wall wiring, safely use your home’s switchboard to power down the circuit supplying electricity to the Daikin unit.

1. Restart the System:

• Wait for at least 5 minutes before turning the power back on at the switchboard. Restart the air conditioner and check if the error persists.

If the U7 error code remains unresolved after following these steps, a professional technician should inspect and repair the system. Please don’t hesitate to ‘contact us’ or give us a free call on 1300 730 896 so we can organise a technician to assist you.

U8 Error Code

Error Description:

The U8 error code on a Daikin air conditioning unit indicates a transmission malfunction between remote controllers. This may be caused by:

• A transmission error between the main and sub remote controllers.
• Incorrect or disconnected wiring between sub remote controllers.
• A defective remote controller PCB.

Need for a Technician:

Yes, resolving the U8 error code typically requires a trained HVAC technician. A professional is necessary to:

• Inspect and repair any wiring issues between the main and sub remote controllers.
• Test the communication circuits for continuity or interference issues.
• Replace faulty remote controller PCBs if required.

Remedies for Untrained End-Users:

You can attempt the following basic checks and steps before contacting a technician:

1. Check Remote Controller Wiring:

• Verify that the wiring between the main and sub remote controllers is securely connected and free from visible damage.

1. Reset the Remote Controller:

• Remove the batteries from the remote controller for a few minutes and reinsert them.
• If your remote is hardwired, turn off the power to the air conditioning system (see instructions below) and then restart the unit.

1. Power Down the Unit:

• If the unit is connected via internal wall wiring, safely use your home’s switchboard to power down the circuit supplying electricity to the Daikin unit.

1. Restart the System:

• Wait at least 5 minutes before restoring power via the switchboard. Turn the unit back on and check if the error persists.

If the U8 error code continues to appear after these steps, professional assistance is required to diagnose and resolve the issue. Please don’t hesitate to ‘contact us’ or give us a free call on 1300 730 896 so we can organise a technician to assist you.

U9 Error Code

Error Description:

The U9 error code on a Daikin air conditioning unit indicates a transmission malfunction involving other indoor and outdoor units in a multi-unit system. This may result from:

• A transmission error between other indoor and outdoor units.
• A defective electronic expansion valve in another indoor unit.
• A defective indoor unit PCB of another unit in the system.
• Improper or disconnected transmission wiring between indoor and outdoor units.

Need for a Technician:

Yes, resolving the U9 error code requires a trained HVAC technician. A professional is necessary to:

• Inspect the transmission wiring connections for proper installation and continuity.
• Diagnose and repair or replace faulty electronic expansion valves or indoor unit PCBs in the multi-unit system.
• Address system-wide communication issues that require advanced tools and expertise.

Remedies for Untrained End-Users:

You can attempt the following basic checks and steps before contacting a technician:

1. Verify Wiring Connections:

• Inspect the visible wiring between the indoor and outdoor units for any signs of damage, disconnection, or loose connections.

1. Restart the System:

• Power down the unit as described below and restore power after a short wait to reset the system.

Power Down Instructions:

• If the unit is connected via internal wall wiring, safely use your home’s switchboard to power down the circuit supplying electricity to the Daikin unit.
• Wait for at least 5 minutes before switching the power back on.
• Turn the unit back on and check if the error code clears.

If the U9 error persists after these steps, it indicates an issue requiring professional attention. Please don’t hesitate to ‘contact us’ or give us a free call on 1300 730 896 so we can organise a technician to assist you.

UA Error Code

Error Description:

The UA error code on a Daikin air conditioning unit signifies a power supply or compatibility issue between the indoor and outdoor units – the error code also appears across a variety of Daikin products from Split/Multi Split, Sky Air, VRV and Chillers. It can occur due to:

• An improper combination of indoor and outdoor units.
• A mismatch in refrigerant type settings between indoor and outdoor units.
• Wrong model connections or an excess number of connected indoor units.
• Improper power supply to the units.
• Defective PCB or a failure to set the outdoor unit PCB after replacement.

This issue typically originates from the outdoor unit, although it may also involve system-wide compatibility.

Need for a Technician:

Yes, a trained HVAC technician is required to resolve this error. The technician will:

• Verify proper compatibility and connections between the indoor and outdoor units.
• Check for defects in the PCB, refrigerant type settings, or power supply issues.
• Configure or replace the outdoor PCB if necessary, which involves advanced tools and system knowledge.

Remedies for Untrained End-Users:

While a technician is often necessary for this error, you can perform the following basic steps before requesting service:

1. Verify System Compatibility:

• Review your unit’s model and refrigerant type to ensure they match. This information is typically available in the product manual or on the unit’s label.

1. Restart the System:

• Power down the unit as described below and restart it to reset the system and potentially clear the error.

Power Down Instructions:

• If the unit is connected via internal wall wiring, safely use your home’s switchboard to power down the circuit supplying electricity to the Daikin unit.
• Wait for at least 5 minutes to allow the system to reset.
• Restore power and turn the unit back on to see if the error clears.

If the UA error persists after following these steps, it indicates a system or PCB issue that requires professional attention. Please don’t hesitate to ‘contact us’ or give us a free call on 1300 730 896 so we can organise a technician to assist you.

UC Error Code

Error Description:

The UC error code on a Daikin air conditioning unit indicates a malfunction in the centralized control system’s address settings. This issue can occur due to:

• Address duplication of centralized control equipment.
• Incorrect or conflicting settings in the centralized control system.
• A defect in the indoor unit PCB.

This error typically originates from the indoor unit or centralized control equipment.

Need for a Technician:

Yes, resolving the UC error requires a trained HVAC technician. The technician will:

• Check the address settings of the centralized control equipment to identify and resolve any conflicts or duplications.
• Inspect the indoor unit PCB for faults and replace it if necessary.
• Ensure proper configuration of the centralized control system to prevent future issues.

Remedies for Untrained End-Users:

Addressing this error often requires professional tools and expertise, but you can perform these basic checks:

1. Verify Address Settings:

• If you are familiar with the centralized control system, ensure that the addresses for all units are unique and correctly assigned.

1. Restart the System:

• Power down the unit as described below and restart it to reset the address configuration.

Power Down Instructions:

• If the unit is connected via internal wall wiring, safely use your home’s switchboard to power down the circuit supplying electricity to the Daikin unit.
• Wait for at least 5 minutes to allow the system to reset.
• Restore power and turn the unit back on to see if the error clears.

If the UC error persists after performing these steps, it likely indicates a fault with the address settings or the indoor unit PCB that requires professional attention. Please don’t hesitate to ‘contact us’ or give us a free call on 1300 730 896 so we can organise a technician to assist you.

UE Error Code

Error Description:

The UE error code on a Daikin air conditioning unit indicates a transmission error between the indoor unit and centralized control equipment. This may result from:

• A malfunction in the connection or communication between the indoor unit and optional controllers for centralized control.
• A disconnected connector for the main controller or the independent/combined use changeover switch.
• Faulty components such as the central remote controller PCB or the indoor unit PCB.

This issue primarily originates from the indoor unit and its associated centralized control equipment.

Need for a Technician:

Yes, a trained HVAC technician is required to resolve this error. The technician will:

• Test the transmission wiring and connectors for faults or disconnections.
• Inspect and repair or replace the central remote controller PCB or the indoor unit PCB as needed.
• Ensure proper setup and connection of centralized control components, including the main controller and any optional controllers.

Remedies for Untrained End-Users:

While professional assistance is typically needed, you can perform the following basic steps:

1. Check Connections:

• If accessible, inspect the connectors for the centralized control equipment to ensure they are securely connected.
• Avoid attempting repairs on internal wiring or PCB components.

1. Restart the System:

• Use the power down instructions below to restart the unit and reset the control system.

Power Down Instructions:

• If the unit is connected via internal wall wiring, safely use your home’s switchboard to power down the circuit supplying electricity to the Daikin unit.
• Wait for at least 5 minutes before restoring power.
• Turn the unit back on and monitor if the error code reappears.

If the UE error persists after these steps, it is likely due to a fault in the centralized control equipment or indoor unit PCB that requires professional diagnosis. Please don’t hesitate to ‘contact us’ or give us a free call on 1300 730 896 so we can organise a technician to assist you.

UF Error Code

Error Description:

The UF error code on a Daikin air conditioning unit indicates that the system has not been properly set up or configured yet. It can also point to:

• Improper connection of transmission wiring between indoor-outdoor units or outdoor-outdoor units.
• A failure to execute the system’s check operation during installation or setup.
• A potential issue with the indoor unit PCB.
• The stop valve not being opened, preventing proper refrigerant flow.

This error can originate from both indoor and outdoor units, depending on the specific setup fault.

Need for a Technician:

Yes, a trained HVAC technician is required to resolve this error. The issue involves diagnosing system setup errors, checking transmission wiring, or ensuring proper valve operation. Additionally, the technician may need to:

• Verify and correct system settings during installation or maintenance.
• Inspect and replace defective wiring or the indoor unit PCB if necessary.

Remedies for Untrained End-Users:

If the system was recently installed or serviced, you can try the following:

1. Ensure Stop Valves are Open:

• Visually inspect the refrigerant stop valves (if accessible) to confirm they are fully open. Only perform this if you are familiar with the valves’ location and operation.
• Do not attempt to operate the valves if you are unsure or if special tools are required.

1. Restart the System:

• Use the power down instructions below to reset the system and allow it to attempt to reinitialise its settings.

Power Down Instructions:

• If the unit is connected via internal wall wiring, safely use your home’s switchboard to power down the circuit supplying electricity to the Daikin unit.
• Leave the system powered off for at least 5 minutes.
• Restore power and turn the unit back on. Monitor if the error code reappears.

If the UF error persists after performing these steps, it indicates a system setup issue or a potential hardware fault requiring professional intervention. Please don’t hesitate to ‘contact us’ or give us a free call on 1300 730 896 so we can organise a technician to assist you.

UH Error Code

Error Description:

The UH error code on a Daikin air conditioning unit indicates a system malfunction potentially caused by:

• Improper connection of transmission wiring between indoor-outdoor units or between outdoor units.
• A defective indoor unit PCB.
• A defective outdoor unit PCB.

This error can originate from either the indoor unit or the outdoor unit, depending on the component or wiring issue.

Need for a Technician:

Yes, resolving the UH error requires a trained HVAC technician. The issue may involve:

• Verifying and correcting transmission wiring connections.
• Diagnosing faults in the indoor or outdoor unit PCBs.
• Addressing complex system configuration errors that require specialised tools and expertise.

Remedies for Untrained End-Users:

While professional assistance is necessary for most causes of this error, you can attempt the following steps to rule out minor issues:

1. Inspect for Visible Wiring Issues:

• If you can safely access transmission wiring, check for loose or visibly disconnected cables. Do not attempt repairs or adjustments yourself.

1. Restart the System:

• Use the power down instructions below to reset the system, which may clear the error if it was triggered by a temporary communication fault.

Power Down Instructions:

• If the unit is connected via internal wall wiring, safely use your home’s switchboard to power down the circuit supplying electricity to the Daikin unit.
• Leave the unit powered off for at least 5 minutes.
• Restore power and turn the unit back on. Observe whether the error code reappears.

If the UH error persists, it indicates a deeper system malfunction requiring professional diagnosis and repair. Please don’t hesitate to ‘contact us’ or give us a free call on 1300 730 896 so we can organise a technician to assist you.

UJ Error Code

Error Description:

The UJ error code on a Daikin air conditioning unit indicates a malfunction in the transmission related to an accessory device. This may occur due to:

• A defect in an accessory device connected to the system.
• Faulty wiring between the unit and the accessory device.

This issue can originate from either the indoor unit or connected accessories.

Need for a Technician:

Yes, resolving the UJ error requires a trained HVAC technician. The technician will need to:

• Inspect and test the accessory device for defects.
• Diagnose and repair any faulty wiring connections.
• Verify proper communication between the main unit and accessory device using specialised tools.

Remedies for Untrained End-Users:

While professional intervention is required for most causes of this error, you can perform the following preliminary checks:

1. Inspect External Connections:

• If an accessory device is visibly connected to the system, ensure all connections appear secure and free of physical damage.
• Avoid adjusting or disconnecting wires yourself.

1. Restart the System:

• Perform a system reset using the power down instructions below. A temporary communication glitch might clear after a restart.

Power Down Instructions:

• If the unit is connected via internal wall wiring, safely use your home’s switchboard to power down the circuit supplying electricity to the Daikin unit.
• Leave the unit powered off for at least 5 minutes.
• Restore power and turn the unit back on. Check if the error code persists.

If the UJ error persists after performing the above steps, it indicates a fault requiring professional attention. Please don’t hesitate to ‘contact us’ or give us a free call on 1300 730 896 so we can organise a technician to assist you.

60 Error Code

Error Description:

The 60 error code on a Daikin air conditioning unit indicates the activation of an external protection device, typically associated with the heat reclaim ventilator (HRV) system. This error could be caused by:

• The actuation of the external protection device.
• Defective output signal wiring.
• A faulty control PCB.

This issue is generally linked to the indoor unit and its connected ventilation components.

Need for a Technician:

Yes, resolving the 60 error requires a trained HVAC technician. The technician will need to:

• Inspect the external protection device for proper operation and reset it if necessary.
• Diagnose potential issues in the output signal wiring for faults or disconnections.
• Test the control PCB for functionality and replace it if defective.

These tasks involve advanced diagnostics and specialised tools, making professional intervention necessary.

Remedies for Untrained End-Users:

While this error code typically necessitates professional assistance, you can perform the following preliminary checks:

1. Check Ventilation Components:

• Inspect any visible connections to the heat reclaim ventilator system to ensure there are no loose or damaged wires.
• Avoid tampering with electrical connections yourself.

1. Restart the System:

• Perform a system reset using the power down instructions below. This may temporarily clear the error if caused by a minor issue or glitch.

Power Down Instructions:

• If the unit is connected via internal wall wiring, safely use your home’s switchboard to power down the circuit supplying electricity to the Daikin unit.
• Leave the system powered off for at least 5 minutes.
• Restore power and turn the unit back on. Check if the error code persists.

If the 60 error persists after performing these steps, it suggests a fault that requires professional attention. Please don’t hesitate to ‘contact us’ or give us a free call on 1300 730 896 so we can organise a technician to assist you.

64 Error Code

Error Description:

The 64 error code on a Daikin air conditioning unit indicates a malfunction of the indoor air thermistor, often in conjunction with the heat reclaim ventilator (HRV). Potential causes include:

• Defective connector contact.
• A faulty indoor air thermistor.
• Issues with the control PCB.

This issue typically originates from the indoor unit and its associated ventilation system.

Need for a Technician:

Yes, resolving the 64 error requires a trained HVAC technician. They will:

• Test the indoor air thermistor to verify its accuracy and functionality.
• Check the connector contact for secure and proper connections.
• Inspect and potentially replace the control PCB if it’s defective.

These tasks involve precise diagnostics and equipment expertise that untrained users cannot safely perform.

Remedies for Untrained End-Users:

If you wish to attempt basic troubleshooting before contacting a technician, you can:

1. Inspect Ventilation Components:

• Ensure no visible damage or loose wires on components near the heat reclaim ventilator.
• Avoid attempting to open or handle thermistors or PCBs yourself.

1. Reset the System:

• Perform a power cycle following the instructions below. This might temporarily resolve minor glitches.

Power Down Instructions:

• If the unit is connected via internal wall wiring, safely use your home’s switchboard to power down the circuit supplying electricity to the Daikin unit.
• Wait at least 5 minutes before restoring power.
• Turn the system back on and check if the error persists.

If the 64 error remains after these steps, it signals an issue that requires professional attention. Please don’t hesitate to ‘contact us’ or give us a free call on 1300 730 896 so we can organise a technician to assist you.

65 Error Code

Error Description:

The 65 error code on a Daikin air conditioning unit indicates a malfunction of the outdoor air thermistor, typically associated with the heat reclaim ventilator (HRV). This can be caused by:

• A defective connector contact.
• A faulty outdoor air thermistor.
• Issues with the control PCB.

This problem originates from the outdoor unit and its related ventilation components.

Need for a Technician:

Yes, resolving the 65 error requires a trained HVAC technician. They will:

• Perform diagnostics on the outdoor air thermistor to check for accurate temperature readings and continuity.
• Inspect and secure the connector contacts.
• Evaluate the control PCB for faults and replace it if necessary.

The tools and technical expertise required make this unsuitable for untrained users.

Remedies for Untrained End-Users:

You can attempt the following steps before contacting a technician:

1. Inspect the Outdoor Unit:

• Ensure there are no visible obstructions or debris near the outdoor unit that might interfere with normal operation.
• Check for visibly loose or disconnected wires (do not attempt repairs yourself).

1. Reset the System:

• Follow the power cycle instructions provided below to reset the unit and clear any temporary errors.

Power Down Instructions:

• If the unit is connected via internal wall wiring, safely use your home’s switchboard to power down the circuit supplying electricity to the Daikin unit.
• Wait at least 5 minutes before restoring power.
• Turn the system back on and verify whether the error persists.

If the 65 error remains after attempting these steps, professional servicing is required to fully resolve the issue. Please don’t hesitate to ‘contact us’ or give us a free call on 1300 730 896 so we can organise a technician to assist you.

6A Error Code

Error Description:

The 6A error code on a Daikin air conditioning unit indicates a malfunction in the damper system, commonly found in units with a heat reclaim ventilator (HRV). This issue can result from:

• A defective connector contact.
• A faulty limit switch.
• A damper motor malfunction.
• Problems with the control PCB.

The fault is related to the ventilation system components rather than the indoor or outdoor air conditioning units directly.

Need for a Technician:

Yes, resolving the 6A error requires a trained HVAC technician. The technician will:

• Test the damper motor for proper operation.
• Inspect and, if needed, replace the limit switch or control PCB.
• Verify all connector contacts for secure and proper wiring.

This level of troubleshooting requires specialised tools and expertise, making it unsuitable for untrained individuals.

Remedies for Untrained End-Users:

While a technician is generally required, you can try the following steps:

1. Check for Obstructions:

• Inspect the HRV unit to ensure there are no visible blockages or debris preventing the damper from operating correctly.

1. Reset the System:

• Follow the power-down instructions below to reset the system and potentially clear the error.

Power Down Instructions:

• If the unit is connected via internal wall wiring, safely use your home’s switchboard to power down the circuit supplying electricity to the Daikin unit.
• Wait at least 5 minutes before restoring power.
• Turn the system back on and check if the error code reappears.

If the 6A error persists after these steps, professional service is required to fully resolve the issue. Please don’t hesitate to ‘contact us’ or give us a free call on 1300 730 896 so we can organise a technician to assist you.

70 Error Code

Error Description:

The 70 error code on a Daikin air conditioning unit typically points to a compressor overheat in System No. 2. This issue may result from:

• Shortage of refrigerant.
• Defective connector contacts.
• A leakage in the four-way valve, which could impact proper refrigerant flow and cooling.

This error originates from the outdoor unit, specifically the compressor system, and requires immediate attention to prevent further damage.

Need for a Technician:

Yes, resolving the 70 error code requires a trained HVAC technician. A professional is needed to:

• Test refrigerant levels and check for leaks.
• Inspect the four-way valve for functionality.
• Evaluate and repair any damaged wiring or connectors.

These tasks involve specialised tools, such as refrigerant pressure gauges and leak detection equipment, which are not accessible to untrained users.

Remedies for Untrained End-Users:

While professional service is necessary for complete resolution, you can try these steps before calling a technician:

1. Inspect for Obstructions:

• Check the outdoor unit to ensure no debris is obstructing airflow to the compressor, which may contribute to overheating.

1. Reset the System:

• Power down the unit following the instructions below, then restart it to see if the error clears.

Power Down Instructions:

• If the unit is connected via internal wall wiring, safely use your home’s switchboard to power down the circuit supplying electricity to the Daikin unit.
• Wait at least 5 minutes to allow the system to reset.
• Turn the system back on and check if the error reappears.

If the 70 error persists after these steps, the issue likely requires technical expertise to prevent further damage to your unit. Please don’t hesitate to ‘contact us’ or give us a free call on 1300 730 896 so we can organise a technician to assist you.

71 Error Code

Error Description:

The 71 error code on a Daikin air conditioning unit indicates a compressor overcurrent issue in System No. 2. This error typically results from:

• A shortage of refrigerant, causing the compressor to work harder than designed.
• A short circuit in the electrical components of the compressor system.
• A defective compressor, which could cause excessive current draw or operational failure.

This issue originates from the outdoor unit, where the compressor is located.

Need for a Technician:

Yes, resolving the 71 error code requires a trained HVAC technician. A professional is needed to:

• Perform electrical tests to identify short circuits or defective components.
• Inspect refrigerant levels and check for possible leaks.
• Assess and repair or replace the compressor if necessary.

These diagnostic and repair tasks involve tools and expertise that are not suitable for untrained users.

Remedies for Untrained End-Users:

While the issue requires professional intervention, you can take these initial steps:

1. Inspect for Obstructions:

• Check the outdoor unit for any blockages, such as leaves or debris, that might impact compressor cooling.

1. Reset the System:

• Follow the power-down instructions below to reset the system and determine if the error clears.

Power Down Instructions:

• If the unit is connected via internal wall wiring, safely use your home’s switchboard to power down the circuit supplying electricity to the Daikin unit.
• Leave the unit powered down for at least 5 minutes to allow a full reset.
• Restore power and observe if the error reoccurs.

If the 71 error code persists after these steps, it is critical to have the unit professionally serviced to avoid further damage to the compressor or other components. Please don’t hesitate to ‘contact us’ or give us a free call on 1300 730 896 so we can organise a technician to assist you.

72 Error Code on Daikin Air Conditioning Unit

Error Description:

The 72 error code on a Daikin air conditioning unit signifies a fan motor overcurrent issue in System No. 2. This problem typically originates from the outdoor unit and is associated with:

• A defective fan motor, which may draw excessive current.
• Poor or loose fan motor connector contacts.
• A defective PCB that fails to regulate or monitor the motor’s electrical current properly.

Need for a Technician:

Yes, resolving the 72 error code requires a trained HVAC technician. Diagnosing and repairing this issue involves:

• Testing the fan motor for electrical faults or excessive resistance.
• Inspecting and repairing connector contacts to ensure proper electrical connections.
• Checking the PCB for any malfunctions or replacement needs.

These tasks involve specialised tools and expertise that exceed what is feasible for untrained users.

Remedies for Untrained End-Users:

Although this issue typically requires professional servicing, you can attempt the following steps before contacting a technician:

1. Inspect the Outdoor Unit:

• Check for physical obstructions, such as dirt or debris, that might be blocking the fan blades.
• Ensure the area around the unit is clear for proper airflow.

1. Reset the System:

• Follow the power-down instructions below to reset the unit and determine if the error resolves itself.

Power Down Instructions:

• If the unit is connected via internal wall wiring, safely use your home’s switchboard to power down the circuit supplying electricity to the Daikin unit.
• Allow the unit to remain off for at least 5 minutes to ensure a full system reset.
• Restore power and monitor the system to see if the error persists.

If the 72 error code remains after attempting these steps, a professional HVAC technician should inspect and repair the unit to prevent further damage. Please don’t hesitate to ‘contact us’ or give us a free call on 1300 730 896 so we can organise a technician to assist you.

73 Error Code

Error Description:

The 73 error code on a Daikin air conditioning unit indicates System No. 2 High-Pressure Switch (HPS) activation, which typically originates from the outdoor unit. This issue may result from:

• A dirty heat exchanger, causing inefficient cooling and high pressure in the system.
• Shortage of water volume in systems with water-based cooling.
• Clogged refrigerant piping, which restricts refrigerant flow.
• Defective HPS or connector contact, resulting in incorrect pressure readings.

Need for a Technician:

Yes, resolving the 73 error code requires a trained HVAC technician. The technician will:

• Inspect the high-pressure switch and associated wiring for faults or damage.
• Clean or service the heat exchanger and verify proper airflow.
• Assess refrigerant piping for blockages or clogs.
• Check the water volume in systems using hydronic cooling.

This involves specialised diagnostic tools and expertise to safely handle refrigerants and electrical components.

Remedies for Untrained End-Users:

Before calling a technician, you can try the following basic checks:

1. Inspect the Outdoor Unit:

• Clear any visible dirt, leaves, or debris from the outdoor unit and heat exchanger to improve airflow.
• Ensure nothing obstructs the airflow around the outdoor unit.

1. Reset the System:

• Follow the power-down instructions below to reset the unit and check if the error resolves.

1. Check Water Supply (if applicable):

• Ensure the water supply for hydronic cooling systems is not interrupted or blocked.

Power Down Instructions:

• If the unit is connected via internal wall wiring, safely use your home’s switchboard to power down the circuit supplying electricity to the Daikin unit.
• Wait at least 5 minutes to allow the system to fully reset.
• Restore power and monitor the system for continued operation or error recurrence.

If the 73 error code persists after these steps, professional servicing is required to prevent potential damage to the system. Please don’t hesitate to ‘contact us’ or give us a free call on 1300 730 896 so we can organise a technician to assist you.

74 Error Code

Error Description:

The 74 error code on a Daikin air conditioning unit indicates System No. 2 Low-Pressure Switch (LPS) activation, typically originating from the outdoor unit. This error occurs when the system detects abnormally low refrigerant pressure, which may result from:

• Clogged refrigerant piping restricting refrigerant flow.
• Shortage of refrigerant gas, often due to leaks.
• Defective LPS or connector contact, causing incorrect pressure readings.

Need for a Technician:

Yes, resolving the 74 error code requires a trained HVAC technician. The technician will:

• Inspect the refrigerant levels and recharge the system if necessary.
• Check for refrigerant leaks and repair them to ensure proper operation.
• Test and, if required, replace the low-pressure switch or associated wiring.

This involves working with refrigerants and specialised equipment, which require certified handling.

Remedies for Untrained End-Users:

Before contacting a technician, try the following safe steps:

1. Inspect the Outdoor Unit:

• Ensure there is no dirt, debris, or obstruction around the outdoor unit to allow proper airflow.

1. Reset the System:

• Perform a system reset using the power-down instructions below to see if the error resolves temporarily.

Power Down Instructions:

• If the unit is connected via internal wall wiring, safely use your home’s switchboard to power down the circuit supplying electricity to the Daikin unit.
• Wait at least 5 minutes to allow the system to reset completely.
• Restore power and monitor the system for continued operation or recurrence of the error.

If the 74 error code persists, professional attention is required to prevent potential damage to the compressor and ensure optimal performance. Please don’t hesitate to ‘contact us’ or give us a free call on 1300 730 896 so we can organise a technician to assist you.

75 Error Code

Error Description:

The 75 error code on a Daikin air conditioning unit indicates a malfunction of the low-pressure sensor in System No. 2, which is typically located in the outdoor unit. This error can result from:

• Defective low-pressure sensor, providing inaccurate readings.
• Faulty connector contact, disrupting the sensor’s functionality.
• Defective PCB, failing to process sensor data correctly.

Need for a Technician:

Yes, resolving the 75 error code requires a trained HVAC technician. This is because:

• Diagnosing and replacing a defective low-pressure sensor involves accessing and handling sensitive components.
• Testing and, if necessary, replacing the PCB requires advanced technical tools and expertise.

Remedies for Untrained End-Users:

Before contacting a technician, you can safely attempt the following:

1. Inspect the Outdoor Unit:

• Ensure there is no physical damage to the outdoor unit or visible issues with the wiring (do not touch internal components).
• Confirm that airflow around the unit is not obstructed by debris or vegetation.

1. Perform a System Reset:

• Follow the power-down instructions below to reset the system and check if the error resolves.

Power Down Instructions:

• If the unit is connected via internal wall wiring, safely use your home’s switchboard to power down the circuit supplying electricity to the Daikin unit.
• Wait for at least 5 minutes to allow the system to reset completely.
• Restore power and monitor the unit to see if the error reappears.

If the 75 error code persists, it’s essential to have a professional technician inspect and resolve the issue to prevent further damage to your unit. Please don’t hesitate to ‘contact us’ or give us a free call on 1300 730 896 so we can organise a technician to assist you.

76 Error Code

Error Description:
The 76 error code on a Daikin air conditioning unit indicates a malfunction of the high-pressure sensor in System No. 2, typically located in the outdoor unit. This error may result from:

• A defective high-pressure sensor, which provides inaccurate pressure readings.
• Faulty connector contact, disrupting the connection between the sensor and control systems.
• A defective PCB, which fails to process the sensor data correctly.

Need for a Technician:

Yes, resolving the 76 error code requires a trained HVAC technician. This is because:

• Diagnosing and replacing a faulty high-pressure sensor involves handling pressurised refrigerant systems and electronic components.
• Verifying and replacing a defective PCB requires advanced technical tools and expertise.

Remedies for Untrained End-Users:

Before contacting a technician, you can safely attempt the following:

1. Inspect the Outdoor Unit:

• Ensure there is no physical damage to the outdoor unit or visible issues with the wiring (do not touch internal components).
• Check for obstructions (e.g., dirt, debris, or vegetation) around the unit that might restrict airflow.

1. Perform a System Reset:
    Follow the power-down instructions below to reset the system and check if the error resolves.

Power Down Instructions:

• If the unit is connected via internal wall wiring, safely use your home’s switchboard to power down the circuit supplying electricity to the Daikin unit.
• Wait for at least 5 minutes to allow the system to reset completely.
• Restore power and monitor the unit to see if the error reappears.

If the 76 error code persists, it’s essential to have a professional technician inspect and resolve the issue to prevent further damage to your unit. Please don’t hesitate to ‘contact us’ or give us a free call on 1300 730 896so we can organise a technician to assist you.

77 Error Code

Error Description:

The 77 error code on a Daikin air conditioning unit indicates a malfunction of the fan interlock in System No. 1. This issue typically originates from the outdoor unit and can result from:

• A defective relay contact that fails to properly activate or deactivate the fan interlock.
• Broken wiring, disrupting the connection necessary for the fan interlock to function correctly.

Need for a Technician:

Yes, resolving the 77 error code requires a trained HVAC technician. This is because:

• Diagnosing and repairing relay contacts or wiring involves accessing and working with the unit’s internal electrical systems, which requires technical expertise and safety precautions.

Remedies for Untrained End-Users:

Before contacting a technician, you can safely attempt the following:

1. Inspect the Outdoor Unit:

• Ensure there is no visible damage to the outdoor unit or wiring (do not attempt to touch internal components).
• Confirm that no debris, dirt, or vegetation is obstructing airflow around the outdoor unit.

1. Perform a System Reset:

• Follow the power-down instructions below to reset the system and check if the error resolves.

Power Down Instructions:

• If the unit is connected via internal wall wiring, safely use your home’s switchboard to power down the circuit supplying electricity to the Daikin unit.
• Wait for at least 5 minutes to allow the system to reset completely.
• Restore power and monitor the unit to see if the error reappears.

If the 77 error code persists, it’s essential to have a professional technician inspect and resolve the issue to prevent further damage to your unit. Please don’t hesitate to ‘contact us’ or give us a free call on 1300 730 896 so we can organise a technician to assist you.

78 Error Code

Error Description:

The 78 error code on a Daikin air conditioning unit indicates a malfunction of the fan interlock in System No. 2, typically associated with the outdoor unit. This error can be caused by:

• A defective relay contact that fails to establish the proper interlock functionality for the fan system.
• A broken wire disrupting the electrical connection necessary for the fan interlock system to operate.

Need for a Technician:

Yes, resolving the 78 error code requires a trained HVAC technician. This is because:

• Diagnosing and repairing issues with relay contacts or broken wiring involves working with internal electrical components, which require specialised tools and expertise to ensure safety and proper resolution.

Remedies for Untrained End-Users:

Before contacting a technician, you can safely attempt the following:

1. Inspect the Outdoor Unit:

• Check the outdoor unit for visible damage or loose wires (do not touch or attempt repairs on internal components).
• Ensure the area around the outdoor unit is clear of debris, dirt, or vegetation that may impede airflow.

1. Perform a System Reset:

• Follow the power-down instructions below to reset the system and check if the error clears.

Power Down Instructions:

• If the unit is connected via internal wall wiring, safely use your home’s switchboard to power down the circuit supplying electricity to the Daikin unit.
• Wait for at least 5 minutes to allow the system to reset completely.
• Restore power and monitor the unit to see if the error persists.

If the 78 error code continues to appear, it’s essential to have a professional technician inspect and resolve the issue to prevent further complications. Please don’t hesitate to ‘contact us’ or give us a free call on 1300 730 896 so we can organise a technician to assist you.

7A Error Code

Error Description:

The 7A error code on a Daikin air conditioning unit indicates a malfunction of the compressor current sensor in System No. 2, typically located in the outdoor unit. This error can result from:

• A defective current sensor, providing inaccurate or no current readings.
• A defective compressor, causing abnormal current draw during operation.
• A defective outdoor unit PCB, failing to process current sensor data correctly.

Need for a Technician:

Yes, resolving the 7A error code requires a trained HVAC technician. This is because:

• Diagnosing and replacing a defective current sensor involves accessing sensitive electrical components.
• Testing the compressor and outdoor unit PCB requires specialised tools and expertise to avoid further damage to the unit.

Remedies for Untrained End-Users:

Before contacting a technician, you can safely attempt the following:

1. Inspect the Outdoor Unit:

• Ensure there is no visible damage to the outdoor unit or its wiring (do not touch internal components).
• Clear any obstructions (e.g., dirt, debris, or vegetation) around the unit to ensure proper airflow.

1. Perform a System Reset:

• Follow the power-down instructions below to reset the system and check if the error resolves.

Power Down Instructions:

• If the unit is connected via internal wall wiring, safely use your home’s switchboard to power down the circuit supplying electricity to the Daikin unit.
• Wait for at least 5 minutes to allow the system to reset completely.
• Restore power and monitor the unit to see if the error reappears.

If the 7A error code persists, it’s essential to have a professional technician inspect and resolve the issue to prevent further damage to your unit. Please don’t hesitate to ‘contact us’ or give us a free call on 1300 730 896 so we can organise a technician to assist you.

7C Error Code

Error Description:

The 7C error code on a Daikin air conditioning unit indicates a malfunction of the pump interlock in System No. 2, typically related to the cooling water pump. This error occurs when the cooling water pump interlock is actuated, potentially due to:

• A failure in the pump interlock system.
• A malfunction or disconnection in the cooling water pump.
• Electrical wiring or communication issues between the pump and the unit.

Need for a Technician:

Yes, resolving the 7C error code requires a trained HVAC technician. This is because:

• Diagnosing and repairing the pump interlock system involves accessing and testing electrical components and connections.
• If the cooling water pump itself is defective, replacement or advanced repair may be necessary, requiring specialised tools and expertise.

Remedies for Untrained End-Users:

Before contacting a technician, you can safely attempt the following:

1. Inspect the Pump System:

• Verify that the cooling water pump is powered and operating correctly.
• Ensure there are no visible disconnections or loose wires leading to the pump.

1. Check for External Blockages:

• Confirm that the pump system is not obstructed by debris or sediment build-up that could trigger the interlock.

1. Perform a System Reset:

• Follow the power-down instructions below to reset the unit and check if the error resolves.

Power Down Instructions:

• If the unit is connected via internal wall wiring, safely use your home’s switchboard to power down the circuit supplying electricity to the Daikin unit.
• Wait for at least 5 minutes to allow the system to reset completely.
• Restore power and monitor the unit to see if the error reappears.

If the 7C error code persists, it’s essential to have a professional technician inspect and resolve the issue to prevent further damage to your system. Please don’t hesitate to ‘contact us’ or give us a free call on 1300 730 896 so we can organise a technician to assist you.

80 Error Code

Error Description:

The 80 error code on a Daikin air conditioning unit indicates a malfunction of the entering water temperature thermistor, typically located in the outdoor unit. This issue may result from:

• A defective entering water temperature thermistor, leading to inaccurate temperature readings.
• Faulty connector contact, disrupting the connection between the thermistor and the system.
• Wiring issues or electrical faults affecting thermistor operation.

Need for a Technician:

Yes, resolving the 80 error code requires a trained HVAC technician. This is because:

• Diagnosing and replacing a faulty thermistor requires accessing and handling sensitive electronic components.
• Testing and resolving wiring or connector faults involve advanced tools and technical expertise.

Remedies for Untrained End-Users:

Before contacting a technician, you can safely attempt the following:

1. Inspect the Outdoor Unit:

• Ensure there is no physical damage to the outdoor unit or visible issues with the wiring near the thermistor (do not touch internal components).
• Check for any obstructions (e.g., dirt, debris, or vegetation) around the unit that might restrict airflow or access.

1. Perform a System Reset:

• Follow the power-down instructions below to reset the system and check if the error resolves.

Power Down Instructions:

• If the unit is connected via internal wall wiring, safely use your home’s switchboard to power down the circuit supplying electricity to the Daikin unit.
• Wait for at least 5 minutes to allow the system to reset completely.
• Restore power and monitor the unit to see if the error reappears.

If the 80 error code persists, it’s essential to have a professional technician inspect and resolve the issue to prevent further damage to your system. Please don’t hesitate to ‘contact us’ or give us a free call on 1300 730 896 so we can organise a technician to assist you.

81 Error Code

Error Description:

The 81 error code on a Daikin air conditioning unit indicates a malfunction of the leaving water temperature thermistor or the drain pipe heater, typically associated with the outdoor unit. This error may result from:

• A defective leaving water temperature thermistor, which fails to provide accurate temperature readings.
• Faulty connector contact, disrupting the connection between the thermistor or drain pipe heater and the system.
• A damaged or defective drain pipe heater, affecting proper water drainage.

Need for a Technician:

Yes, resolving the 81 error code requires a trained HVAC technician. This is because:

• Diagnosing and replacing a malfunctioning thermistor or drain pipe heater involves accessing sensitive electronic components and ensuring proper recalibration.
• Faulty connections or component replacements require technical expertise to prevent further issues.

Remedies for Untrained End-Users:

Before contacting a technician, you can safely attempt the following:

1. Inspect the Outdoor Unit:

• Check for any physical damage to the outdoor unit, particularly around the wiring or the drain pipe heater.
• Ensure there is no visible debris or obstruction near the unit that could interfere with its operation.

1. Perform a System Reset:

• Follow the power-down instructions below to reset the system and see if the error resolves.

Power Down Instructions:

• If the unit is connected via internal wall wiring, safely use your home’s switchboard to power down the circuit supplying electricity to the Daikin unit.
• Wait for at least 5 minutes to allow the system to reset completely.
• Restore power and monitor the unit to see if the error reappears.

If the 81 error code persists, it’s essential to have a professional technician inspect and resolve the issue to ensure proper functionality and prevent long-term damage. Please don’t hesitate to ‘contact us’ or give us a free call on 1300 730 896 so we can organise a technician to assist you.

82 Error Code

Error Description:

The 82 error code on a Daikin air conditioning unit indicates a malfunction of the refrigerant thermistor in System No. 1, typically located in the outdoor unit. This error may result from:

• A defective refrigerant thermistor, leading to inaccurate temperature readings.
• Faulty connector contact, disrupting the communication between the thermistor and the system.

Need for a Technician:

Yes, resolving the 82 error code requires a trained HVAC technician. This is because:

• Diagnosing and replacing a defective refrigerant thermistor involves accessing pressurised refrigerant lines and temperature-sensitive components.
• Ensuring accurate calibration after replacement requires specialised tools and expertise.

Remedies for Untrained End-Users:

Before contacting a technician, you can safely attempt the following:

1. Inspect the Outdoor Unit:

• Ensure there is no visible physical damage or disconnected wiring around the outdoor unit.
• Check for obstructions (e.g., dirt, debris, or vegetation) near the unit that might restrict airflow or disrupt operation.

1. Perform a System Reset:

• Follow the power-down instructions below to reset the system and check if the error resolves.

Power Down Instructions:

• If the unit is connected via internal wall wiring, safely use your home’s switchboard to power down the circuit supplying electricity to the Daikin unit.
• Wait for at least 5 minutes to allow the system to reset completely.
• Restore power and monitor the unit to see if the error reappears.

If the 82 error code persists, it’s essential to have a professional technician inspect and resolve the issue to ensure the system operates correctly and prevent long-term damage. Please don’t hesitate to ‘contact us’ or give us a free call on 1300 730 896 so we can organise a technician to assist you.

83 Error Code

Error Description:

The 83 error code on a Daikin air conditioning unit indicates a malfunction of the refrigerant thermistor in System No. 2, typically located in the outdoor unit. This error may result from:

• A defective refrigerant thermistor, which provides inaccurate temperature readings.
• Faulty connector contact, disrupting the communication between the thermistor and the control system.

Need for a Technician:

Yes, resolving the 83 error code requires a trained HVAC technician. This is because:

• Diagnosing and replacing a faulty refrigerant thermistor involves handling sensitive refrigerant systems and electrical components.
• Ensuring the proper operation and calibration of the new thermistor requires specialised tools and expertise.

Remedies for Untrained End-Users:

Before contacting a technician, you can safely attempt the following:

1. Inspect the Outdoor Unit:

• Ensure there is no visible physical damage or disconnected wiring around the outdoor unit.
• Check for obstructions (e.g., dirt, debris, or vegetation) near the unit that might restrict airflow.

1. Perform a System Reset:

• Follow the power-down instructions below to reset the system and check if the error resolves.

Power Down Instructions:

• If the unit is connected via internal wall wiring, safely use your home’s switchboard to power down the circuit supplying electricity to the Daikin unit.
• Wait for at least 5 minutes to allow the system to reset completely.
• Restore power and monitor the unit to see if the error reappears.

If the 83 error code persists, it’s essential to have a professional technician inspect and resolve the issue to prevent further damage to your system. Please don’t hesitate to ‘contact us’ or give us a free call on 1300 730 896 so we can organise a technician to assist you.

84 Error Code

Error Description:

The 84 error code on a Daikin air conditioning unit indicates a malfunction of the heat exchanger thermistor in System No. 1, typically located in the indoor unit. This error may be caused by:

• A defective heat exchanger thermistor, resulting in incorrect temperature readings.
• Faulty connector contact, disrupting the thermistor’s connection to the control system.

Need for a Technician:

Yes, resolving the 84 error code requires a trained HVAC technician. This is necessary because:

• Replacing or repairing the heat exchanger thermistor involves accessing internal components and ensuring proper calibration for accurate system performance.
• Identifying and addressing potential connector or wiring issues requires specialised tools and expertise.

Remedies for Untrained End-Users:

Before contacting a technician, you can safely attempt the following:

1. Inspect the Indoor Unit:

• Ensure there is no visible physical damage or disconnected wiring near the indoor unit.
• Check for obstructions (e.g., dust or debris) around the unit that could affect performance.

1. Perform a System Reset:

• Follow the power-down instructions below to reset the system and check if the error resolves.

Power Down Instructions:

• If the unit is connected via internal wall wiring, safely use your home’s switchboard to power down the circuit supplying electricity to the Daikin unit.
• Wait for at least 5 minutes to allow the system to reset completely.
• Restore power and monitor the unit to see if the error reappears.

If the 84 error code persists, it’s essential to have a professional technician inspect and resolve the issue to ensure optimal functionality. Please don’t hesitate to ‘contact us’ or give us a free call on 1300 730 896 so we can organise a technician to assist you.

85 Error Code

Error Description:

The 85 error code on a Daikin air conditioning unit indicates a malfunction of the heat exchanger thermistor in System No. 2, which is typically located in the outdoor unit. This error may be caused by:

• A defective heat exchanger thermistor, leading to inaccurate temperature detection.
• Faulty connector contact, interrupting communication between the thermistor and the system.

Need for a Technician:

Yes, resolving the 85 error code requires a trained HVAC technician. This is because:

• Replacing or calibrating the heat exchanger thermistor involves handling sensitive components and ensuring accurate integration with the control system.
• Diagnosing and repairing connector or wiring issues requires specialised tools and expertise.

Remedies for Untrained End-Users:

Before contacting a technician, you can safely try the following:

1. Inspect the Outdoor Unit:

• Ensure there is no visible damage to the unit or its components.
• Check for debris or obstructions around the outdoor unit that might affect performance.

1. Perform a System Reset:

• Follow the power-down instructions below to reset the system and see if the error resolves.

Power Down Instructions:

• If the unit is connected via internal wall wiring, safely use your home’s switchboard to power down the circuit supplying electricity to the Daikin unit.
• Wait for at least 5 minutes to allow the system to reset completely.
• Restore power and monitor the unit to see if the error reappears.

If the 85 error code persists, it is important to have a professional technician inspect and repair the issue to avoid further complications. Please don’t hesitate to ‘contact us’ or give us a free call on 1300 730 896 so we can organise a technician to assist you.

86 Error Code

Error Description:

The 86 error code on a Daikin air conditioning unit indicates a malfunction of the discharge pipe thermistor in System No. 1, typically located in the outdoor unit. This error can be caused by:

• A defective discharge pipe thermistor, resulting in inaccurate temperature readings.
• Faulty connector contact, which disrupts communication between the thermistor and the unit.

Need for a Technician:

Yes, resolving the 86 error code requires a trained HVAC technician. This is because:

• Diagnosing and replacing a defective discharge pipe thermistor requires specialised tools and knowledge to access and handle sensitive components.
• Ensuring proper reconnection and calibration of the system is critical for restoring accurate functionality.

Remedies for Untrained End-Users:

Before calling a technician, you can attempt the following simple steps:

1. Inspect the Outdoor Unit:

• Look for any physical damage or debris around the outdoor unit that might obstruct airflow or performance.
• Check for visible wiring or connector issues, but do not attempt to touch or disassemble components.

1. Perform a System Reset:

• Follow the power-down instructions below to reset the system and see if the error clears.

Power Down Instructions:

• If the unit is connected via internal wall wiring, safely use your home’s switchboard to power down the circuit supplying electricity to the Daikin unit.
• Wait for at least 5 minutes to allow the system to reset completely.
• Restore power and monitor the unit to see if the error reoccurs.

If the 86 error code persists, it’s essential to have a professional technician inspect and resolve the issue to avoid further damage. Please don’t hesitate to ‘contact us’ or give us a free call on 1300 730 896 so we can organise a technician to assist you.

88 Error Code

Error Description:

The 88 error code on a Daikin air conditioning unit indicates a malfunction of the discharge pipe temperature in System No. 2, typically originating from the outdoor unit. This error can result from:

• Shortage of gas, leading to insufficient refrigerant circulation and improper temperature readings.
• Defective discharge pipe thermistor, providing inaccurate temperature data.
• Faulty connector contact, disrupting the thermistor’s communication with the system.
• Clogged refrigerant piping, obstructing the refrigerant flow.

Need for a Technician:

Yes, resolving the 88 error code requires a trained HVAC technician. This is because:

• Diagnosing issues such as refrigerant shortages or clogged piping involves specialised tools and expertise.
• Replacing or repairing a defective thermistor and ensuring the refrigerant system is functioning correctly requires technical skills and equipment.

Remedies for Untrained End-Users:

Before contacting a technician, you can perform the following steps:

1. Inspect the Outdoor Unit:

• Ensure the outdoor unit is free from physical damage or debris that might obstruct airflow.
• Check for visible issues with wiring or piping. Do not attempt to touch internal components.

1. Perform a System Reset:

• Follow the power-down instructions below to reset the system and see if the error clears.

Power Down Instructions:

• If the unit is connected via internal wall wiring, safely use your home’s switchboard to power down the circuit supplying electricity to the Daikin unit.
• Wait for at least 5 minutes to allow the system to reset completely.
• Restore power and monitor the unit to see if the error persists.

If the 88 error code continues to appear, it’s essential to have a professional technician inspect and resolve the issue to prevent further damage to your unit. Please don’t hesitate to ‘contact us’ or give us a free call on 1300 730 896 so we can organise a technician to assist you.

89 Error Code

Error Description:

The 89 error code on a Daikin air conditioning unit indicates a malfunction related to freezing in the brazed-plate heat exchanger, typically originating from the outdoor unit. This issue can result from:

• Dirty heat exchanger, restricting airflow and causing freezing conditions.
• Shortage of refrigerant, leading to improper heat transfer and temperature imbalance.
• Defective thermistor, providing incorrect temperature readings.

Need for a Technician:

Yes, resolving the 89 error code requires a trained HVAC technician. This is because:

• Cleaning or replacing a brazed-plate heat exchanger involves handling specialised components.
• Diagnosing and repairing refrigerant shortages or defective thermistors requires advanced tools and technical expertise.

Remedies for Untrained End-Users:

Before contacting a technician, you can safely attempt the following steps:

1. Inspect the Outdoor Unit:

• Ensure the outdoor unit is clean and free of debris or obstructions.
• Check for any visible frost or ice buildup on the heat exchanger fins.

1. Perform a System Reset:

• Follow the power-down instructions below to reset the system and see if the error resolves.

Power Down Instructions:

• If the unit is connected via internal wall wiring, safely use your home’s switchboard to power down the circuit supplying electricity to the Daikin unit.
• Wait for at least 5 minutes to allow the system to reset completely.
• Restore power and monitor the unit to see if the error persists.

If the 89 error code continues to appear, it’s essential to have a professional technician inspect and resolve the issue to prevent further damage to your unit. Please don’t hesitate to ‘contact us’ or give us a free call on 1300 730 896 so we can organise a technician to assist you.

8A Error Code

Error Description:

The 8A error code on a Daikin air conditioning unit indicates a malfunction of the leaving water temperature thermistor in System No. 2, typically located in the outdoor unit. This issue may arise due to:

• Defective connector contact, disrupting the connection and thermistor readings.
• Defective leaving water temperature thermistor, leading to inaccurate temperature measurements.

Need for a Technician:

Yes, resolving the 8A error code requires a trained HVAC technician. This is because:

• Testing and replacing a leaving water temperature thermistor involves handling precise components that require professional diagnostic tools.
• Verifying and repairing connector issues may involve accessing delicate wiring and connections.

Remedies for Untrained End-Users:

Before contacting a technician, you can attempt the following safe actions:

1. Inspect for Visible Issues:

• Check the outdoor unit for any visible signs of damage or loose connections.
• Ensure there are no obstructions or debris around the unit that could impact performance.

1. Perform a System Reset:

• Follow the power-down instructions below to reset the system and check if the error resolves.

Power Down Instructions:

• If the unit is connected via internal wall wiring, safely use your home’s switchboard to power down the circuit supplying electricity to the Daikin unit.
• Wait at least 5 minutes to allow the system to reset completely.
• Restore power and monitor the unit to see if the error persists.

If the 8A error code continues to display, professional assistance is necessary to address the issue effectively. Please don’t hesitate to ‘contact us’ or give us a free call on 1300 730 896 so we can organise a technician to assist you.

8E Error Code

Error Description:

The 8E error code on a Daikin air conditioning unit indicates a malfunction of the suction pipe thermistor 1 for heating in System No. 1, typically located in the outdoor unit. The issue may stem from:

• Defective connector contact, disrupting the connection and thermistor readings.
• Defective suction pipe thermistor, resulting in inaccurate temperature detection.

Need for a Technician:

Yes, resolving the 8E error code requires a trained HVAC technician. This is because:

• Diagnosing and replacing the suction pipe thermistor involves accessing and working with sensitive components that require specialised tools and expertise.
• Ensuring proper connections and calibrating the replacement thermistor is essential for the unit to function correctly.

Remedies for Untrained End-Users:

Before contacting a technician, you can try the following safe steps:

1. Inspect the Outdoor Unit:

• Visually check the outdoor unit for any signs of damage or loose wiring near the suction pipe thermistor.
• Do not attempt to touch or adjust internal components.

1. Perform a System Reset:

• Follow the power-down instructions below to reset the system and see if the error clears.

Power Down Instructions:

• If the unit is connected via internal wall wiring, safely use your home’s switchboard to power down the circuit supplying electricity to the Daikin unit.
• Wait at least 5 minutes to allow the system to reset fully.
• Restore power and observe if the error reappears.

If the 8E error persists, it is essential to have a professional HVAC technician inspect and resolve the issue to avoid further complications. Please don’t hesitate to ‘contact us’ or give us a free call on 1300 730 896 so we can organise a technician to assist you.

8F Error Code

Error Description:

The 8F error code on a Daikin air conditioning unit indicates a malfunction of the suction pipe thermistor 2 for heating in System No. 1, which is typically located in the outdoor unit. Possible causes of this error include:

• Defective connector contact, interrupting proper thermistor operation.
• Defective suction pipe thermistor, leading to inaccurate temperature readings.

Need for a Technician:

Yes, resolving the 8F error code requires a trained HVAC technician. This is because:

• Diagnosing and replacing the suction pipe thermistor involves accessing sensitive components that are integral to the heating system.
• Proper testing and calibration of the thermistor ensure the heating system operates efficiently without causing further issues.

Remedies for Untrained End-Users:

Before contacting a technician, you can safely attempt the following:

1. Inspect the Outdoor Unit:

• Check for any visible damage to the outdoor unit or its wiring, especially near the suction pipe thermistor.
• Avoid touching or adjusting internal components.

1. Perform a System Reset:

• Follow the power-down instructions below to reset the system and see if the error clears.

Power Down Instructions:

• If the unit is connected via internal wall wiring, safely use your home’s switchboard to power down the circuit supplying electricity to the Daikin unit.
• Wait at least 5 minutes to allow the system to reset fully.
• Restore power and monitor the unit to determine if the error reoccurs.

If the 8F error persists, it’s essential to have a professional HVAC technician investigate and resolve the issue to maintain optimal performance and prevent further complications. Please don’t hesitate to ‘contact us’ or give us a free call on 1300 730 896 so we can organise a technician to assist you.

8H Error Code

Error Description:

The 8H error code on a Daikin air conditioning unit indicates abnormal hot water high temperature, typically related to the unit’s hot water system or heat pump. This error can occur due to:

• A three-way valve malfunction, which may prevent proper water flow.
• A defective thermistor, providing inaccurate temperature readings.
• An issue with the water temperature setting, resulting in overheating.

Need for a Technician:

Yes, resolving the 8H error code requires a trained HVAC technician. This is necessary because:

• Diagnosing and repairing a malfunctioning three-way valve or thermistor requires accessing and handling internal components.
• Verifying and recalibrating the water temperature settings involves technical expertise to ensure safe operation.

Remedies for Untrained End-Users:

Before contacting a technician, you can safely attempt the following:

1. Check the Hot Water System:

• Inspect for visible leaks or blockages in the water lines connected to the system.
• Ensure there is adequate water flow to the unit.

1. Perform a System Reset:

• Follow the power-down instructions below to reset the system and see if the error resolves.

Power Down Instructions:

• If the unit is connected via internal wall wiring, safely use your home’s switchboard to power down the circuit supplying electricity to the Daikin unit.
• Wait for at least 5 minutes to allow the system to reset completely.
• Restore power and monitor the unit to determine if the error persists.

If the 8H error code continues, it’s critical to have a professional HVAC technician address the issue to prevent damage to the unit or associated systems. Please don’t hesitate to ‘contact us’ or give us a free call on 1300 730 896 so we can organise a technician to assist you.

90 Error Code

Error Description:

The 90 error code on a Daikin air conditioning unit indicates an abnormal chilled water quantity or abnormal AXP (Auxiliary Pressure Sensor). This issue often originates in systems involving chilled water cooling and can result from:

• Shortage of water volume, leading to insufficient cooling performance.
• Disconnection or malfunction of the AXP, disrupting proper pressure sensing.

Need for a Technician:

Yes, resolving the 90 error code requires a trained HVAC technician. This is because:

• Diagnosing and addressing water volume issues may involve inspecting and repairing water pumps, pipes, or valves.
• A disconnected or defective AXP requires specialised tools to test, replace, or recalibrate the sensor.

Remedies for Untrained End-Users:

Before contacting a technician, you can safely attempt the following:

1. Inspect the Water System:

• Check for visible leaks, blockages, or kinks in the water lines connected to the unit.
• Ensure there is adequate water supply to the system and that the valves are fully open.

1. Perform a System Reset:

• Follow the power-down instructions below to reset the system and check if the error resolves.

Power Down Instructions:

• If the unit is connected via internal wall wiring, safely use your home’s switchboard to power down the circuit supplying electricity to the Daikin unit.
• Wait for at least 5 minutes to allow the system to reset completely.
• Restore power and monitor the unit to determine if the error persists.

If the 90 error code continues, it’s essential to have a professional HVAC technician inspect and resolve the issue to prevent further system damage. Please don’t hesitate to ‘contact us’ or give us a free call on 1300 730 896 so we can organise a technician to assist you.

91 Error Code

Error Description:

The 91 error code on a Daikin air conditioning unit indicates a malfunction of the electronic expansion valve in System No. 2, which is typically located in the outdoor unit. This issue may arise from:

• Defective connector contact, disrupting the valve’s operation.
• Defective electronic expansion valve coil, preventing proper regulation of refrigerant flow.

Need for a Technician:

Yes, resolving the 91 error code requires a trained HVAC technician. This is because:

• Diagnosing and repairing the electronic expansion valve involves accessing sealed refrigerant components and using specialised tools.
• Ensuring the correct calibration and operation of the valve requires technical expertise.

Remedies for Untrained End-Users:

Before contacting a technician, you can safely attempt the following:

1. Inspect the Outdoor Unit:

• Ensure the outdoor unit is free from physical damage, debris, or obstructions that might affect airflow.
• Check for visible signs of loose wiring or disconnected components (do not touch internal parts).

1. Perform a System Reset:

• Follow the power-down instructions below to reset the system and see if the error resolves.

Power Down Instructions:

• If the unit is connected via internal wall wiring, safely use your home’s switchboard to power down the circuit supplying electricity to the Daikin unit.
• Wait for at least 5 minutes to allow the system to reset fully.
• Restore power and monitor the unit to determine if the error reappears.

If the 91 error code persists, it’s essential to have a professional technician inspect and resolve the issue to avoid further damage to the unit. Please don’t hesitate to ‘contact us’ or give us a free call on 1300 730 896 so we can organise a technician to assist you.

92 Error Code on Daikin Air Conditioning Unit

Error Description:

The 92 error code on a Daikin air conditioning unit indicates a malfunction of the suction pipe thermistor in System No. 2, which is typically part of the outdoor unit. This issue may be caused by:

• Defective connector contact, leading to intermittent or failed readings.
• Defective suction pipe thermistor, resulting in inaccurate temperature monitoring.

Need for a Technician:

Yes, resolving the 92 error code requires a trained HVAC technician. This is because:

• The suction pipe thermistor is a critical component of the refrigeration system, and replacing it involves working with precise refrigerant temperature controls.
• Diagnosing and correcting connector issues or replacing the thermistor necessitates specialised tools and expertise to avoid further damage.

Remedies for Untrained End-Users:

Before contacting a technician, you can safely attempt the following:

1. Inspect the Outdoor Unit:

• Ensure there is no visible damage or obstruction around the outdoor unit.
• Check for signs of loose wires or debris near the unit (do not handle internal components).

1. Perform a System Reset:

• Follow the power-down instructions below to reset the system and check if the error resolves.

Power Down Instructions:

• If the unit is connected via internal wall wiring, safely use your home’s switchboard to power down the circuit supplying electricity to the Daikin unit.
• Wait at least 5 minutes for the system to reset.
• Restore power and monitor the unit to determine if the error persists.

If the 92 error code remains unresolved after these steps, it is essential to contact a professional technician to address the issue and prevent further complications. Please don’t hesitate to ‘contact us’ or give us a free call on 1300 730 896 so we can organise a technician to assist you.

94 Error Code

Error Description:

The 94 error code on a Daikin air conditioning unit indicates a malfunction of transmission between the heat reclaim ventilator and the fan unit. This issue may be caused by:

• A defective fan unit PCB, disrupting communication between components.
• A defective connecting wire, causing intermittent or failed transmission signals.

Need for a Technician:

Yes, resolving the 94 error code requires a trained HVAC technician. This is because:

• Diagnosing the transmission issue involves testing and potentially replacing the fan unit PCB or repairing wiring connections.
• Accessing and handling these components requires specialised tools and knowledge to avoid damaging the unit or voiding the warranty.

Remedies for Untrained End-Users:

Before contacting a technician, you can safely attempt the following:

1. Inspect the Unit’s External Wiring:

• Check for visible signs of damage or disconnection in the wiring between the heat reclaim ventilator and fan unit.
• Do not handle or attempt to reconnect internal wires or components.

1. Perform a System Reset:

• Follow the power-down instructions below to reset the system and see if the error resolves.

Power Down Instructions:

• If the unit is connected via internal wall wiring, safely use your home’s switchboard to power down the circuit supplying electricity to the Daikin unit.
• Wait at least 5 minutes to allow the system to fully reset.
• Restore power and monitor the unit to determine if the error persists.

If the 94 error code continues to display after attempting these steps, it’s essential to have a professional technician inspect and resolve the issue. Please don’t hesitate to ‘contact us’ or give us a free call on 1300 730 896 so we can organise a technician to assist you.

95 Error Code

Error Description:

The 95 error code on a Daikin air conditioning unit indicates a malfunction of the inverter system in System No. 1, typically related to:

• A defective fan inverter unit, which regulates the fan motor’s speed and efficiency.

Need for a Technician:

Yes, resolving the 95 error code requires a trained HVAC technician. This is because:

• Diagnosing and repairing the inverter system involves handling high-voltage components and specialised testing equipment.
• Replacing or repairing the fan inverter unit requires technical expertise to ensure proper calibration and system integrity.

Remedies for Untrained End-Users:

Before contacting a technician, you can safely attempt the following:

1. Inspect the Unit for Obstructions:

• Ensure there are no external obstructions around the fan or air vents that could be impeding airflow.

1. Perform a System Reset:

• Follow the power-down instructions below to reset the system and check if the error resolves.

Power Down Instructions:

• If the unit is connected via internal wall wiring, safely use your home’s switchboard to power down the circuit supplying electricity to the Daikin unit.
• Wait at least 5 minutes to allow the system to fully reset.
• Restore power and monitor the unit to determine if the error persists.

If the 95 error code remains after performing these steps, it is essential to contact a professional technician to inspect and resolve the issue. Please don’t hesitate to ‘contact us’ or give us a free call on 1300 730 896 so we can organise a technician to assist you.

96 Error Code

Error Description:

The 96 error code on a Daikin air conditioning unit indicates a malfunction of the inverter system in System No. 2, typically associated with:

• A defective fan inverter unit, which controls the fan motor’s speed and efficiency.

Need for a Technician:

Yes, resolving the 96 error code requires a trained HVAC technician. This is because:

• Diagnosing the inverter system involves testing high-voltage electrical components and circuits.
• Repairing or replacing the fan inverter unit requires specialised tools and expertise to maintain proper system functionality and safety.

Remedies for Untrained End-Users:

Before contacting a technician, you can safely attempt the following steps:

1. Inspect the Outdoor Unit:

• Check that there are no visible obstructions or debris near the fan or vents that might impede airflow.

1. Perform a System Reset:

• Follow the power-down instructions provided below to reset the unit and see if the error clears.

Power Down Instructions:

• If the unit is connected via internal wall wiring, safely use your home’s switchboard to power down the circuit supplying electricity to the Daikin unit.
• Wait for at least 5 minutes to allow the system to reset fully.
• Restore power and observe if the error code reappears.

If the 96 error code persists after these steps, it is essential to contact a professional technician for further diagnosis and resolution. Please don’t hesitate to ‘contact us’ or give us a free call on 1300 730 896 so we can organise a technician to assist you.

97 Error Code

Error Description:

The 97 error code on a Daikin air conditioning unit indicates a malfunction of the thermal storage unit. This component helps regulate and store temperature within the system, ensuring efficient operation. The issue typically originates from:

• A defective thermal storage unit that cannot maintain proper operation.

Need for a Technician:

Yes, resolving the 97 error code requires a trained HVAC technician. This is because:

• Diagnosing the thermal storage unit involves evaluating specialised system components and their integration with the cooling/heating cycle.
• Replacing or repairing the thermal storage unit requires technical expertise and proper calibration to maintain system efficiency.

Remedies for Untrained End-Users:

Before contacting a technician, you can safely try the following steps:

1. Inspect the Unit for Obstructions:

• Check for visible debris or obstructions near the outdoor or indoor unit that could interfere with airflow or system operation.

1. Perform a System Reset:

• Follow the power-down instructions below to reset the system and see if the error clears.

Power Down Instructions:

• If the unit is connected via internal wall wiring, safely use your home’s switchboard to power down the circuit supplying electricity to the Daikin unit.
• Wait for at least 5 minutes to allow the system to reset fully.
• Restore power and monitor the unit to check if the error reappears.

If the 97 error code persists, it is essential to have a professional technician inspect and resolve the issue. Please don’t hesitate to ‘contact us’ or give us a free call on 1300 730 896 so we can organise a technician to assist you.

98 Error Code

Error Description:

The 98 error code on a Daikin air conditioning unit indicates a malfunction of the thermal storage brine pump. This error may be caused by:

• Actuation of the thermal storage brine pump overcurrent (OC) due to electrical or mechanical issues in the pump operation.

Need for a Technician:

Yes, resolving the 98 error code requires a trained HVAC technician. This is because:

• Diagnosing the thermal storage brine pump involves specialised tools to measure electrical current and check for mechanical blockages or wear.
• Repair or replacement of the pump requires technical expertise to ensure the system operates efficiently and safely.

Remedies for Untrained End-Users:

Before contacting a technician, you can safely attempt the following:

1. Inspect for Obstructions:

• Check the area around the unit for debris or physical obstructions that might impede the operation of the thermal storage system.
• Do not attempt to disassemble or access internal components of the unit.

1. Perform a System Reset:

• Follow the power-down instructions below to reset the system and see if the error clears.

Power Down Instructions:

• If the unit is connected via internal wall wiring, safely use your home’s switchboard to power down the circuit supplying electricity to the Daikin unit.
• Wait for at least 5 minutes to allow the system to reset fully.
• Restore power and monitor the unit to check if the error reappears.

If the 98 error code persists, it is essential to have a professional technician inspect and resolve the issue. Please don’t hesitate to ‘contact us’ or give us a free call on 1300 730 896 so we can organise a technician to assist you.

99 Error Code

Error Description:

The 99 error code on a Daikin air conditioning unit indicates a malfunction of the thermal storage brine tank, specifically caused by:

• Low water level in the thermal storage brine tank.

This issue typically arises from insufficient brine solution or a fault in the water level detection system.

Need for a Technician:

Yes, resolving the 99 error code requires a trained HVAC technician. This is because:

• The technician must inspect the brine tank system to identify and resolve the cause of the low water level, which may involve refilling the brine solution or addressing sensor malfunctions.
• Ensuring proper balance and operation of the brine system requires technical expertise to prevent damage to the unit.

Remedies for Untrained End-Users:

Before contacting a technician, you can safely attempt the following:

1. Inspect the Area Around the Unit:

• Check for visible leaks or damage to the brine tank and associated pipes.
• Do not attempt to open or refill the tank unless directed by a technician or manual.

1. Perform a System Reset:

• Follow the power-down instructions below to reset the system and see if the error clears.

Power Down Instructions:

• If the unit is connected via internal wall wiring, safely use your home’s switchboard to power down the circuit supplying electricity to the Daikin unit.
• Wait for at least 5 minutes to allow the system to reset fully.
• Restore power and monitor the unit to check if the error reappears.

If the 99 error code persists, it’s crucial to have a professional technician inspect the thermal storage system. Please don’t hesitate to ‘contact us’ or give us a free call on 1300 730 896 so we can organise a technician to assist you.