Daikin AC Heat Pump Error Codes

Daikin AC Heat Pump Error Codes

Fault diagnosis by remote controller
The remote controller can receive a corresponding error code from the indoor unit.
SYSTEM
00 NORMAL
U0 REFRIGERANT SHORTAGE
U2 DROP VOLTAGE OR MAIN CIRCUIT OVERVOLTAGE
INDOOR UNIT
U4 FAILURE OF TRANSMISSION (BETWEEN INDOOR UNIT AND OUTDOOR UNIT) INDOOR UNIT
A1 INDOOR PCB DEFECTIVENESS
A5 HIGH PRESSURE CONTROL OR FREEZE-UP PROTECTOR
A6 FAN MOTOR FAULT
C4 FAULTY HEAT EXCHANGER TEMPERATURE SENSOR
C9 FAULTY SUCTION AIR TEMPERATURE SENSOR
OUTDOOR UNIT
EA COOLING-HEATING SWITCHING ERROR
E5 OL STARTED E6 FAULTY COMPRESSOR START UP
E7 DC FAN MOTOR FAULT E8 OVERCURRENT INPUT
F3 HIGH TEMPERATURE DISCHARGE PIPE CONTROL
H6 OPERATION HALT DUE TO FAULTY POSITION DETECTION SENSOR
H8 DC CURRENT SENSOR FAULT
H9 FAULTY SUCTION AIR TEMPERATURE SENSOR
J3 FAULTY DISCHARGE PIPE TEMPERATURE SENSOR
J6 FAULTY HEAT EXCHANGER TEMPERATURE SENSOR
L4 HIGH TEMPERATURE AT INVERTER CIRCUIT HEATSINK
L5 OUTPUT OVERCURRENT
P4 FAULTY INVERTER CIRCUIT HEATSINK TEMPERATURE SENSOR
NOTE
• A short beep and two consecutive beeps indicate non-corresponding codes.
• To cancel the code display, hold for 5 seconds. The code display also cancel itself if the button is not pressed for 1 minute.