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