Trouble Shooting
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Daikin Trouble Shooting Guide
Past & Current Models
Daikin Fault Codes
Indoor Fault Codes
Fault Code Definition Supposed Causes Split Skyair VRV Package
A0 External protection active External protection wired to T1-T2 active • • •
A1 Failure of indoor PCB Defect of PCB or noise • • • •
A3 High water level Float switch open circuit • • •
A5 HP control in heating or freeze
protection in cooling
Poor airflow, short circuit, EEV, refrigerant charge,
indoor coil sensor incorrect value
•
A6 Fan motor failure Locked, over current, over load • • • •
A7 Failure of louvre motor Louvre motor/indoor PCB failed • •
A8 Failure of power supply Over current of AC input, defect of supply • •
A9 EEV failure Defect of EEV motor, indoor PCB • •
AF High water level Float switch open circuit while thermo off • •
AH Failure of dust collector Defect of dust collecting element, PCB • • •
AJ Capacity setting error Capacity setting adaptor missing • • •
C1 Communication failure. Between
main-sub PCB
Failure of communication fan motor
control driver
• •
C4 Indoor coil sensor Open/short circuit • • • •
C5 Suction pipe sensor Open/short circuit • • •
C6 Failure of fan motor driver Defect of fan motor sensor, control driver • •
C7 Front panel driving motor fault Defect of limit switch, front panel driving motor •
C9 Return air sensor fault Return air sensor open/short circuit • • • •
CA Discharge air sensor fault Discharge air sensor open/short circuit • •
CC Failure of humidity sensor Failed humidity sensor • •
CJ Failure of remote sensor Defect of remote controller sensor • •
Daikin Fault Codes
Outdoor Fault Codes
Fault Code Definition Supposed Causes Split Skyair VRV Package
E0 Protection devices tripped Outdoor safety device tripped • • •
E1 Failure of outdoor PCB Defect of PCB or noise • • • •
E3 High pressure High pressure switch tripped • • •
E4 Low pressure Low pressure switch tripped • • •
E5 Inverter compressor lock Inverter compressor locked • • •
E5 Inverter compressor to hot Compressor windings too hot •
E6 DOL compressor locked High current draw • • • •
E7 Fan motor failure Failed fan motor, PCB • • • •
E8 Inv compressor high current Compressor, PCB • • •
E9 EEV motor failure EEV motor, PCB • • •
EA 4-way valve failure Defect of valve, PCB, sensor •
EC Inlet water temperature Abnormal water temperature •
EF Thermal storage unit defect Thermal storage EEV, PCB, sensor •
F3 High discharge temperature Discharge temperature over 110°C • • • •
F6 High pressure in cooling Detected by outdoor coil sensor •
F6 Over charged Refrigerant over charge • •
H0 Compressor sensor system All sensors disconnected •
H1 Failure of humidifier damper Defect of limit switch/damper •
H3 Failure of hp switch High pressure switch open circuit • • • •
H4 Failure of lp switch Low pressure switch open circuit • •
H5 Failure of compressor sensor Defect of compressor overload sensor •
H6 Compressor position failure Position detection error •
H7 Failure of fan motor signal Defect of fan motor, PCB • • •
H8 Compressor input error Defect of transistor, PCB, reactor •
H9 Failed ambient sensor Sensor open short circuit • • • •
J1 Failed pressure sensor Pressure sensor failed • •
J2 Failed current sensor Defect of current sensor, PCB, compressor • • •
J3 Failed discharge pipe sensor Discharge pipe sensor open/short circuit • • • •
J4 Failed outdoor coil vapour sensor Sensor open/short circuit • •
J5 Failed suction pipe sensor Sensor open/short circuit • • • •
J6 Failed outdoor coil sensor Sensor open/short circuit • • • •
J7 Failed liquid pipe sensor Sensor open/short circuit • • •
J8 Failed liquid pipe sensor Sensor open/short circuit •
J9 Failed sub cool heat exchanger sensor Sensor open/short circuit • • • •
JA Failed high pressure sensor High pressure sensor open/short circuit • • •
JC Failed low pressure sensor Low pressure sensor open/short circuit • • •
JH Failed oil temperature sensor Open/short circuit •
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