Understanding Daikin Aircon Error Codes: Troubleshooting Guide in Singapore


Daikin air conditioners are widely used in Singapore for their reliable performance and energy efficiency. However, like any complex electronic system, they can occasionally encounter errors or malfunctions. To help Singaporean homeowners and technicians effectively troubleshoot Daikin aircon issues, it is crucial to understand the error codes and their meanings. This article will provide an in-depth guide to Daikin aircon error codes, offering valuable insights and solutions for common problems faced in the Singapore context.

  1. Importance of Error Codes:

Daikin air conditioners employ error codes as diagnostic tools to identify specific faults within the system. These codes help users and technicians quickly identify the underlying issue, enabling prompt resolution. Understanding these error codes can save time and money by avoiding unnecessary service calls or misdiagnosing problems.

  1. Common Daikin Aircon Error Codes in Singapore:

2.1. E0: Communication Error

Daikin aircon error code E0 indicates a communication failure between the indoor and outdoor units or the remote controller. It could be due to a faulty wiring connection, a defective PCB, or signal interference. Inspecting the wiring and ensuring proper connections is the first step towards resolving this error. If the issue persists, it is advisable to seek assistance from a professional technician.

2.2. E1: High-Pressure Error

The E1 error code occurs when the refrigerant pressure in the system exceeds the permissible limit. This error can be caused by factors such as a clogged air filter, blocked condenser coil, or insufficient refrigerant charge. To address this issue, start by cleaning or replacing the air filter and ensuring proper airflow. If the error persists, it is recommended to contact a certified technician to check the refrigerant charge and inspect the system for any leaks or blockages.

2.3. E5: Overheating Error

The E5 error code indicates that the air conditioner’s internal temperature has exceeded the safe operating limit. This error can arise from various factors, including a malfunctioning fan motor, a blocked air intake, or a faulty thermal sensor. Start by cleaning the air intake and ensuring proper ventilation around the unit. Additionally, check the fan motor’s operation and connections. If the issue persists, professional assistance should be sought to avoid further damage.

2.4. E7: Fan Motor Error

When the indoor or outdoor fan motor encounters a fault, the E7 error code is displayed. This error may result from a motor malfunction, a broken fan blade, or an electrical issue. Carefully inspect the fan motor’s condition and connections. If necessary, replace the faulty motor or repair any electrical issues. It is recommended to consult a qualified technician for assistance in addressing this error.

  1. Advanced Error Codes and Troubleshooting:

Apart from the common error codes mentioned above, Daikin air conditioners have more specific error codes that require specialized attention. Some advanced error codes include:

3.1. U0: Refrigerant System Problem

The U0 error code indicates a problem with the refrigerant system. It could be due to issues such as low refrigerant levels, a malfunctioning expansion valve, or a refrigerant leak. Resolving this error code typically requires the expertise of a certified technician who can accurately diagnose and repair the specific issue within the refrigerant system.

3.2. A3: Indoor Fan Motor Lock

The A3 error code suggests a lock or malfunction in the indoor fan motor. This error may occur due to a faulty motor or an obstruction in the fan’s movement. Check for any blockages or debris that may be preventing the fan from rotating freely. If the issue persists, it is advisable to consult a professional technician for further inspection and repair.

3.3. H8: Compressor Overload

The H8 error code indicates an overload condition in the compressor. This error can be caused by factors such as a faulty compressor, a refrigerant system issue, or inadequate power supply. In such cases, it is crucial to contact a certified technician to evaluate the compressor’s condition and address any underlying issues to prevent further damage.

3.4. J3: Discharge Temperature Abnormal

The J3 error code signifies an abnormal discharge temperature, often caused by a malfunctioning sensor or issues related to the refrigerant system. It is recommended to seek professional assistance to diagnose and repair this error, as it involves intricate components within the air conditioner.

Understanding these advanced error codes is vital for professional technicians who deal with complex aircon repairs. In such cases, seeking assistance from a certified Daikin service center or a qualified technician is recommended.

  1. Preventive Measures and Maintenance:

To minimize the occurrence of error codes and maximize the lifespan of a Daikin air conditioner, regular preventive maintenance is crucial. Homeowners in Singapore can follow these maintenance tips:

4.1. Clean or replace air filters regularly to maintain optimal airflow.

4.2. Keep the outdoor unit free from debris and vegetation to ensure proper heat exchange.

4.3. Schedule annual professional inspections to identify and address potential issues proactively.

4.4. Use the air conditioner in energy-efficient modes and adjust temperature settings appropriately to avoid excessive strain on the system.

  1. Troubleshooting Additional Error Codes:

In addition to the error codes mentioned earlier, Daikin air conditioners may display other specific error codes that require attention. These codes could indicate issues such as a faulty thermistor, a malfunctioning compressor, or a problem with the electronic control board. When encountering these error codes, it is recommended to consult the Daikin user manual or seek professional assistance to diagnose and resolve the specific issue accurately.

  1. Importance of Professional Assistance:

While some minor issues can be resolved by homeowners, complex problems and advanced error codes should be handled by trained technicians. Attempting to fix such issues without the necessary expertise can lead to further damage or personal injury. It is advisable to contact a certified Daikin service center or a qualified technician who has the knowledge and experience to diagnose and repair complex aircon problems effectively.


Being aware of Daikin aircon error codes and their meanings is essential for both homeowners and technicians in Singapore. With this knowledge, troubleshooting common issues becomes more efficient, and appropriate steps can be taken to resolve them promptly. Remember to consult professional help when encountering advanced error codes or complex problems to ensure a safe and effective resolution. By maintaining regular preventive maintenance and following best practices, Singaporeans can enjoy optimal performance and an extended lifespan from their Daikin air conditioners.