Daikin Fault Code List

A0 l External protection device abnormality
A1 l PCB abnormality
A3 l Drain level control system (S1L) abnormality
A6 l Fan motor (M1F) lock, overload
A6 l Indoor unit fan motor abnormality
A6 l Overload / overcurrent / lock of indoor unit fan motor
A7 l Swing flap motor (M1S) abnormality
A8 l Power supply voltage abnormality
A9 l Electronic expansion valve coil abnormality / dust clogging
A9 l Electronic expansion valve coil abnormality
AF l Drain level above limit
AJ l Capacity determination device abnormality
C1 l Transmission abnormality between indoor unit PCB and fan PCB
C4 l Heat exchanger liquid pipe thermistor abnormality
C5 l Heat exchanger gas pipe thermistor abnormality
C6 l Combination error between indoor unit PCB and fan PCB
C9 l Suction air thermistor abnormality Remote sensor abnormality
CA l Thermistor abnormality
CC l Humidity sensor system abnormality
CJ l Room temperature thermistor in remote controller abnormality
E1 l PCB abnormality
E3 l Actuation of high pressure switch
E4 l Actuation of low pressure sensor
E5 l INV compressor motor lock
E6 l Compressor damage alarm
E7 l Outdoor unit fan motor abnormality
E9 l Electronic expansion valve coil abnormality
F3 l Discharge pipe temperature abnormality
F4 l Wet alarm
F6 l Refrigerant overcharged
H3 l Harness abnormality (between control PCB and inverter PCB)
H7 l Outdoor unit fan motor signal abnormality
H9 l Outdoor air thermistor (R1T) abnormality
J3 l Discharge pipe thermistor (R21T, R22T, R2T) abnormality
Compressor surface temperature thermistor (R14T) abnormality
J5 l Compressor suction thermistor (R12T) abnormality
Suction air thermistor (R10T) abnormality
J6 l Heat exchanger deicer thermistor (R11T) abnormality
Heat exchanger gas pipe thermistor (R8T, R9T) abnormality
J7 l Receiver inlet thermistor (R3T) abnormality
Subcooling heat exchanger liquid pipe thermistor (R7T) abnormality
J8 l Heat exchanger liquid pipe thermistor (R4T, R5T) abnormality
J9 l Subcooling heat exchanger gas pipe thermistor (R6T) abnormality
Receiver gas purge thermistor (R13T) abnormality
JA l High pressure sensor abnormality
JC l Low pressure sensor abnormality
L1 l Inverter PCB abnormality
L3 l Reactor temperature rise abnormality

L4 l Inverter radiation fin temperature rise abnormality
L5 l INV compressor instantaneous overcurrent
L8 l INV compressor overcurrent
L9 l INV compressor startup abnormality
LC l Transmission error between inverter and control PCB
P1 l Power supply voltage imbalance
P3 l Reactor Temperature Abnormality
P4 l Inverter radiation fin temperature abnormality
PJ l Field setting after replacing outdoor unit main PCB abnormality or combination
of PCB abnormality System

U0 l Refrigerant shortage
U1 l Reverse phase, open phase
U2 l Power supply insufficient or instantaneous abnormality
U3 l Check operation is not executed
U4 l Transmission error between indoor units and outdoor units
U5 l Transmission error between remote controller and indoor unit
U7 l Transmission error between outdoor units
U8 l Transmission error between main and sub remote controllers
U9 l Transmission error between indoor and outdoor units in the same system
UA l Improper combination of indoor and outdoor units, indoor units and remote
controller
UC l Address duplication of centralized control equipment
UE l Transmission error between centralized control equipment and indoor unit
UF l System is not set yet
UH l System abnormality, refrigerant system address undefined