Daikin Split Type AC Error Codes
Error Codes and Description
System
00
U0* Refrigerant shortage
U2 Low-voltage detection or over-voltage detection
U4 Signal transmission error (between indoor unit and outdoor unit)
UA Unspecified voltage (between indoor unit and outdoor unit)
Indoor Unit
A1 Indoor unit PCB abnormality
A5 Freeze-up protection control or heating peak-cut control
A6 Fan motor or related abnormality DC motor (FTXS series) / AC motor (FDXS series)
C4 Indoor heat exchanger thermistor or related abnormality
C9 Room temperature thermistor or related abnormality
Outdoor Unit
E1 Outdoor unit PCB abnormality
E5* OL activation (compressor overload)
E6* Compressor lock
E7* DC fan lock
E8 Input overcurrent detection
EA FourWay valve abnormality
F3 Discharge pipe temperature control
F6 High pressure control in cooling
H0 Compressor system sensor abnormality
H6 Position sensor abnormality
H8 DC voltage / current sensor abnormality (09/12 class only) & CT or related abnormality (24/30/36 class only)
H9 Outdoor temperature thermistor or related abnormality
J3* Discharge pipe thermistor or related abnormality
J6 Outdoor heat exchanger thermistor or related abnormality
L3 Electrical box temperature rise
L4 Radiation fin temperature rise
L5* Output overcurrent detection
P4 Radiation fin thermistor or related abnormality
U7 Signal transmission error on outdoor unit PCB (24/30/36 class only)
*Displayed only when system-down occurs.
