Daikin Error Codes
Search Code or Problem
Indoor Unit Error Codes
A0
External protection device activated.
A1
Failure of the indoor unit’s PCB (Printed Circuit Board).
A3
Abnormal drainage.
A5
High-pressure control during heating or freeze-up protection during cooling.
A6
Fan motor malfunction.
A7
Swing flap motor malfunction.
A9
Electronic expansion valve malfunction.
C4
Failure of the liquid pipe thermistor for the heat exchanger.
C9
Failure of the suction air thermistor.
Outdoor Unit Error Codes
E0
Protection devices activated.
E1
Malfunction of outdoor unit PCB.
E3
High pressure sensor (HPS) activated.
E5
Overcurrent or compressor motor lock.
E4
Low pressure sensor (LPS) activated.
E6
Compressor motor overcurrent or lock.
E7
Outdoor fan motor malfunction.
E9
Electronic expansion valve malfunction.
F3
Malfunction of discharge pipe temperature.
H9
Malfunction of outdoor air thermistor.