How to fix Daikin Aircon Error code
Daikin air conditioners are recognized for their efficient performance and reliability. However, like any other appliance, they may sometimes display error codes. These codes signify specific problems and assist users in diagnosing issues swiftly. By understanding these error codes, users can prevent costly repairs and ensure their air conditioners operate at peak efficiency. This guide outlines common Daikin air conditioning error codes and provides effective solutions for fixing them.
What is Daikin aircon error code?
Daikin air conditioners have a system of error codes designed to inform users about any potential malfunctions within the unit. These codes are conveniently displayed either on the air conditioner’s display panel or on the remote control, making it easy for users to access important diagnostic information.
Each error code corresponds to a specific problem, allowing you to quickly identify the root cause of the issue. By accurately interpreting the displayed code, you can take informed steps to resolve the problem and ensure your air conditioning system operates smoothly and efficiently.How to Check Daikin Error Codes
How to Check Daikin Aircon Error Codes
Step 1: Use the remote control and press the ‘Cancel’ button continuously until the error code appears on the display.
Step 2: Observe any blinking LED lights on the aircon unit.
Step 3: Refer to the Daikin user manual or this guide for troubleshooting steps.
List of Daikin Aircon Error Code
| Code | Fault Description | Cause/Explanation |
|---|---|---|
| A1 | Micro-computer in PCB is not working | Fault in PCB assembly or external factors like noise. |
| A3 | Drain level is too high | Clogging of dirt in the drain or faulty drain pump. |
| A5 | Overheating or freezing of indoor heat exchanger | Dirty air filter, short circuit, or trouble with the sensor in the heat exchanger. |
| A6 | Fan motor error | Fan motor is locked, overloaded, or has a faulty connection. |
| A7 | Swing flap motor error | Fault with the swing flap motor or faulty connection. |
| AH | Dust collector error | Fault with the dust collector or a dirty element. |
| AJ | Capacity setting error | Faulty capacity or address setting. |
| C3 | Abnormal water level sensor resistance | Disconnected, short-circuited, or faulty water level sensor. |
| C4 | Abnormal resistance level of indoor heat thermistor | Disconnected or short-circuited thermistor. |
| C9 | Resistance of indoor unit suction air thermistor is abnormal | Disconnected cable or short circuit. |
| CE | Abnormal radiation thermistor resistance | Faulty thermistor, disconnected cable, or short circuit of the thermistor. |
| CJ | Abnormal remote controller thermistor resistance | Fault with the built-in remote controller. |
| E0 | Outdoor unit protection devices activated | Clogged refrigerant piping system, insufficient refrigerant, or faulty compressor/fan motor. |
| E3 | High pressure is too high (HPS activation) | Short-circuited/overloaded condenser or dirty heat exchanger. |
| E4 | Low pressure is too low (LPS activation) | Clogged refrigerant piping system, insufficient refrigerant, or faulty LPS switch. |
| E5 | Overheating of compressor (OL activation) | Clogged refrigerant piping system, insufficient refrigerant, or fault with OL or the connection. |
| F3 | Outdoor unit discharge temperature is too high | Insufficient refrigerant, clogged refrigerant piping, or faulty discharge temperature thermistor. |
| H9 | Abnormal resistance of the outdoor air temperature thermistor | Faulty thermistor, disconnected cable, or short-circuited thermistor. |
| J5 | Abnormal resistance of the suction pipe temperature thermistor | Faulty suction pipe thermistor, disconnected cable, or short-circuited thermistor. |
| J6 | Abnormal resistance of the outdoor heat exchanger thermistor | Faulty or short-circuited outdoor heat exchanger thermistor, or disconnected cable. |
| P1 | Open phase power voltage imbalance | Three-phase or open-phase voltage imbalance. |
| U0 | Suction pipe temperature is too high | Fault in refrigerant piping system—clogging, lack of refrigerant, or fault with the expansion valve. |
| U1 | Reverse phase | Three-phase power supply has been reversed. |
| U2 | Open phase or power voltage imbalance | Open-phase or voltage imbalance, power failure, or low DC voltage of the fan motor. |
| U4 | Communication error between indoor and outdoor units/outdoor and BS units | Issue with interconnection wires or PCB fault in indoor/outdoor units. |
| U5 | Communication error between indoor unit and remote controller | Issue with interconnection wires or PCB fault in indoor/outdoor remote controller. |
| UA | Combination error of indoor/BS/outdoor unit, setting error of PCB at site | Incorrect combination of indoor, BS, or outdoor units. |
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Preventative Maintenance Tips to Avoid Error Codes
To minimize the risk of encountering error codes, follow these maintenance tips:
- Regularly clean air filters to maintain airflow and efficiency.
- Ensure proper ventilation around the outdoor unit.
- Check for refrigerant leaks periodically.
- Schedule annual aircon servicing with a trusted professional.
Conclusion
Familiarizing yourself with Daikin air conditioning error codes is essential for identifying and resolving issues swiftly, preventing them from worsening. Regular maintenance, coupled with timely servicing, plays a crucial role in averting numerous common problems that can disrupt your comfort. Should you face recurring error messages, you can rely on Letscool Aircon for professional repair and maintenance services, ensuring your system operates efficiently and reliably.
Frequently Asked Questions
How do I check the Daikin aircon error code using the remote?
Point the Daikin remote at the indoor unit, press and hold the Cancel button for about 5 seconds, then press it repeatedly until you hear a long beep. The code shown on the remote is the error code.
What does the Daikin U4 error code mean?
Daikin U4 error code usually means there is a communication problem between the indoor unit and outdoor unit. It may be caused by wiring issues, loose connection, PCB fault, or power interruption.
Can I still use my Daikin aircon when an error code appears?
It is better to switch off the aircon if the error code keeps coming back. Continuing to use it may cause more damage, especially if the issue is related to the compressor, PCB, refrigerant, or electrical parts.
What does the Daikin U0 error code mean?
Daikin U0 error code is often related to refrigerant issues, such as low gas, gas leakage, or refrigerant flow problems. A technician should check the pressure, piping condition, and possible leakage before topping up gas.
What does the Daikin A3 error code mean?
Daikin A3 error code usually points to a drainage or water level issue. This can happen when the drain pipe is clogged, the drain pump has a problem, or water cannot flow out properly.
Can resetting my Daikin aircon clear the error code?
A simple reset may clear temporary errors caused by power interruption or system delay. But if the fault is still there, the error code will return after the aircon starts running again.
Why is my Daikin aircon showing L5 error?
Your Daikin aircon may show L5 error because of compressor overload, faulty outdoor PCB, wiring issue, or poor outdoor unit condition. It is better not to keep restarting the aircon many times.
Why does my Daikin aircon show E4 error and stop cooling?
Your Daikin aircon may show E4 error when the system pressure is too low. This can happen if there is not enough gas, a gas leak, blocked piping, or an outdoor unit issue.
Why is my Daikin aircon showing A3 error and leaking water?
Your Daikin aircon may show A3 error when water cannot flow out properly. This often happens because of a blocked drainage pipe, dirty fan coil, clogged water tray, or poor drainage flow.
