Daikin Air Conditioner Error Codes – Troubleshooting
Daikin air conditioners use a series of built-in self-diagnosis tools to spot any potential problems with window, wall, and universal air con. These codes are useful for self-repairs or when contacting a service.
When error codes appear on the Daikin AC remote, this tells the user there’s a drag with the AC unit. The error code that's displayed will tell you the problem or problem that occurs with the AC.
|
SYSTEM |
CODE |
Meaning |
Possible Cause |
|
UA |
Indoor-Outdoor Unit Combination Fault |
There is an wrong combination of indoor, BS or outdoor units |
|
|
U0 |
Refrigerant Shortage |
A fault with the refrigerant piping system – either clogging or a scarcity of refrigerant, or there could also be a fault with the expansion valve |
|
|
U2 |
Drop Voltage Or Main Circuit Overvoltage |
There could also be an open phase or a voltage imbalance within the power supply. There also might be an influence failure or the DC voltage of the fan motor might be too low |
|
|
U4 |
Failure Of Transmission (linking Indoor Unit And Outdoor Unit) |
A wrong with the interconnection wires, or an indoor/outdoor PCB fault. |
|
|
INDOOR UNIT |
A1 |
Indoor Pcb Defectiveness |
This is a fault that happens either within the assembly of the PC or thanks to an external factor, like noise. |
|
A3 |
Drain level is too high |
This is caused by a clogging of dirt within the drain, or a faulty drain pump. |
|
|
A5 |
Freeze-Up Protector |
This could be caused by a unclean air cleaner , a brief circuit or trouble with the sensor within the heat exchange. |
|
|
A6 |
Fan Motor Fault |
The fan motor is either locked, overloaded and is affected by a faulty connection. |
|
|
A7 |
Swing flap motor error |
A liability with the swing flap motor, or a faulty connection. |
|
|
C4 |
Faulty Heat Exchanger Temperature Sensor |
This means the thermistor has either become disconnected or it's short circuited. |
|
|
C9 |
Faulty Suction Air Temperature Sensor |
Either a disconnection of the cable, or a brief circuit has occurred. |
|
|
OUTDOOR UNIT |
E1 |
Circuit Board Fault |
Outdoor PCB defect |
|
E5 |
Ol Started |
Refrigerant piping system might be clogged, there might not be enough refrigerant, or there might be a fault with the OL or the connection |
|
|
E6 |
Faulty Compressor Start Up |
Outdoor Standard compressor lock overcurrent |
|
|
E7 |
Dc Fan Motor Fault |
Outdoor Fan motor lock – Overload |
|
|
E8 |
Over current Input |
Outdoor Inverter input overcurrent |
|
|
F3 |
High Temperature Discharge Pipe Control |
Insufficient refrigerant, clogged refrigerant piping or the discharge temperature thermistor might be faulty. |
|
|
F6 |
High Pressure Control (In Cooling) |
Outdoor Refrigerant overcharged |
|
|
H0 |
Sensor Fault |
Malfunction of sensor system of compressor |
|
|
H6 |
Operation Halt Due To Faulty Position Detection Sensor |
Outdoor Compressor motor position detection sensor error |
|
|
H8 |
Dc Current Sensor Fault |
Outdoor Current transformer error |
|
|
H9 |
Faulty Suction Air Temperature Sensor |
The outdoor air thermistor might be faulty, there could also be a cable disconnection or the thermistor itself may have short circuited. |
|
|
J3 |
Faulty Discharge Pipe Temperature Sensor |
Outdoor Faulty/Fault of discharge pipe thermistor |
|
|
J6 |
Faulty Heat Exchanger Temperature Sensor |
Either a faulty or short circuited thermistor, or the cable could also be disconnected. |
|
|
L3 |
Electrical Parts Heat Fault |
Outdoor Electronic component box overheat |
|
|
L4 |
High Temperature At Inverter Circuit Heat sink |
Outdoor Inverter cooling defect |
|
|
L5 |
Output Over current |
Outdoor Comp motor ground fault Short circuit |
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|
P4 |
Faulty Inverter Circuit Heat sink Temperature Sensor |
Outdoor Power unit humidity sensor malfunction |
Very Informative Video