Daikin is a well-known brand in the air conditioning industry and offers a wide range of AC models. However, like any other electronic device, Daikin ACs may encounter errors and malfunctioning, which can cause inconvenience and discomfort to the users. To identify the problem and resolve it, the AC displays error codes on the unit or the remote control. In this article, we will discuss the common Daikin AC error codes and their solutions.
Table of Contents
Error Code U0
This error code indicates that the AC is experiencing problems with the refrigerant piping. The most common reasons for this error code are a refrigerant leak or a faulty valve. To resolve this issue, you should contact a professional technician to identify and repair the leak or replace the faulty valve.
Error Code U2
The U2 error code indicates that there is a problem with the outdoor temperature sensor. This sensor measures the temperature of the outdoor unit and sends a signal to the control board. If the sensor is faulty or dirty, it may not send an accurate signal, causing the AC to malfunction. To fix this error, clean the sensor and ensure it is placed in the right location. If the issue persists, replace the sensor.
Error Code E0
This error code indicates that there is a problem with the AC’s circuit board. This issue can be caused by a power surge or a voltage fluctuation. To resolve this error, turn off the AC and unplug it from the power source. Wait for a few minutes, then plug it back in and turn it on. If the error code persists, contact a professional technician to replace the circuit board.
Error Code E1
The E1 error code indicates that there is a problem with the AC’s indoor unit. This issue can be caused by a faulty motor, a blocked air filter, or a dirty evaporator coil. To resolve this error, clean the air filter and evaporator coil. If the issue persists, contact a professional technician to replace the motor.
Error Code E3
The E3 error code indicates that there is a problem with the AC’s high-pressure switch. This switch is responsible for monitoring the refrigerant pressure in the AC. If the pressure exceeds the safe limit, the switch will shut down the AC to prevent damage. To resolve this error, check the refrigerant level and add more if necessary. If the issue persists, contact a professional technician to replace the switch.
Error Code J2
The J2 error code indicates that there is a problem with the AC’s discharge temperature sensor. This sensor measures the temperature of the refrigerant leaving the compressor. If the sensor is faulty or dirty, it may not send an accurate signal, causing the AC to malfunction. To fix this error, clean the sensor and ensure it is placed in the right location. If the issue persists, replace the sensor.
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Error Code: U0 Meaning: Low pressure drop (LPD) switch open circuit or faulty
Error Code: U1 Meaning: High pressure drop (HPD) switch open circuit or faulty
Error Code: U2 Meaning: Compressor overcurrent
Error Code: U3 Meaning: Inverter PCB heat sink temperature sensor open circuit or faulty
Error Code: U4 Meaning: Transmission between inverter PCB and main microprocessor PCB faulted
Error Code: U5 Meaning: Current sensor open circuit or faulty
Error Code: U6 Meaning: Serial communication fault between inverter PCB and main microprocessor PCB
Error Code: U7 Meaning: Transmission between inverter PCB and outdoor unit PCB faulted
Error Code: U8 Meaning: Transmission between inverter PCB and remote controller faulted
Error Code: U9 Meaning: Transmission error between indoor unit and outdoor unit PCB
Error Code: EA Meaning: Communication error between indoor unit and outdoor unit PCB
Error Code: J2 Meaning: Malfunction of discharge air temperature sensor
Error Code: J3 Meaning: Malfunction of suction air temperature sensor
Error Code: J4 Meaning: Malfunction of heat exchanger temperature sensor
Error Code: J5 Meaning: Malfunction of outdoor temperature sensor
Error Code: J6 Meaning: Malfunction of outdoor heat exchanger temperature sensor
Error Code: J7 Meaning: Malfunction of refrigerant temperature sensor
Error Code: J8 Meaning: Malfunction of water temperature sensor
Error Code: J9 Meaning: Malfunction of indoor unit heat exchanger temperature sensor
Error Code: H1 Meaning: Malfunction of indoor unit fan motor
Error Code: H3 Meaning: Malfunction of indoor unit drain pump
Error Code: H4 Meaning: Malfunction of outdoor unit fan motor
Error Code: H5 Meaning: Malfunction of outdoor unit heat exchanger thermistor
Error Code: H6 Meaning: Malfunction of inverter PCB
Error Code: H7 Meaning: Malfunction of outdoor unit discharge pipe thermistor
Error Code: H8 Meaning: Malfunction of outdoor unit suction pipe thermistor
Error Code: H9 Meaning: Malfunction of outdoor unit electronic expansion valve
Error Code: E0 Meaning: Faulty relay on indoor unit control PCB
Error Code: E1 Meaning: PCB malfunction or faulty PCB EEPROM
Error Code: E2 Meaning: Malfunction of indoor unit room temperature sensor
Error Code: E3 Meaning: Malfunction of indoor unit coil temperature sensor
Error Code: E4 Meaning: Malfunction of outdoor unit heat exchanger temperature sensor
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Conclusion
In conclusion, if you encounter any of these error codes on your Daikin AC unit, it’s important to address the issue promptly to prevent further damage to your unit. Some issues can be fixed with simple solutions, while others require the expertise of a professional technician. Regular maintenance, including cleaning or replacing air filters, can also help prevent these errors from occurring in the first place.
FAQ – Daikin AC Error Codes
Q: What are Daikin AC Error Codes?
A: Daikin AC Error Codes are numerical codes that appear on the indoor unit display or on the remote controller LCD screen, indicating a specific fault or malfunction in the air conditioning system.
Q: How do I know if my Daikin AC has an error code?
A: Your Daikin AC will display an error code on the indoor unit or on the remote controller LCD screen. Consult your user manual for a list of error codes and their meanings.
Q: What should I do if my Daikin AC displays an error code?
A: First, consult your user manual for a list of error codes and their meanings. Once you have identified the error code, follow the recommended solution provided in the manual. If the issue persists, contact a qualified HVAC technician to diagnose and repair the problem.
Q: Can I reset the error code on my Daikin AC?
A: Yes, you can reset the error code on your Daikin AC by turning off the power to the unit and then turning it back on again. However, it is important to address the underlying issue causing the error code to prevent it from recurring.
Q: What are some common Daikin AC Error Codes?
A: Some common Daikin AC Error Codes include:
A1: Indoor PCB defect
A3: Drain level above limit
A5: Freeze-up protection
A6: Fan motor lock
A7: Swing flap motor lock
A8: Indoor heat exchanger temperature sensor error
A9: Indoor unit fan motor abnormal
E0: Communication error between indoor and outdoor units
E1: High pressure protection
E3: Low pressure protection
H3: Outdoor high temperature protection
Q: How can I prevent Daikin AC Error Codes?
A: Regular maintenance and cleaning of your Daikin AC can help prevent error codes. Also, ensure that the unit is installed and used in accordance with the manufacturer’s instructions.
Q: Who should I contact if I cannot resolve a Daikin AC error code?
A: Contact a qualified HVAC technician to diagnose and repair any issues with your Daikin AC. It is important to address any errors promptly to prevent further damage to the system.
