Daikin Air Conditioners: Fault Codes List

Error indication example:

E0 - the protective device (general) has worked, where

E - classification code,  0 - detailed code.


A0- Protective device tripped  ( general)

A1- Malfunction of the printed circuit board of the indoor unit

A2 - Fan motor lock

A3 - Abnormal drainage

A4 - Heat exchanger malfunction (temperature)

A5 - Abnormal heat exchanger temperature

A6 - Fan motor overload

A7- Malfunction of the blinds drive

A8 - Total current overload

A9 - Defect of electronic expansion valve

AA - Heater Overheat

AH - dirty air filter

AC - Idling

AJ - Incorrect performance setpoint (indoor unit)

AE - Inadequate Water Supply

AF - Humidifier defect

C0 sensor fault (general)

C3 - defective drainage level sensor

C4 - malfunction of the heat exchanger temperature sensor 1

C5 - malfunction of the temperature sensor of the heat exchanger 2

C6 - fan motor overload, sensor lock

C7 - defective shutter drive sensor

C8 - input current sensor defective

C9 - defective input air thermistor

CA - outgoing air thermistor defective

CH - pollution sensor tripped

CC - faulty humidity sensor

CJ - faulty temperature sensor on the control panel

CE - radiation sensor malfunction

CF - high pressure sensor failure


E0- triggered protective device (general)

E1 - malfunction of the printed circuit board of the outdoor unit

E3 - High Pressure Sensor ( HPS triggered

E4 - Low Pressure Sensor ( LPS triggered

E5 - compressor motor overload, overheating relay

E6 - overcurrent compressor motor lock

E7 - overcurrent fan motor lock

E8 - general current overload

E9 - electronic expansion valve malfunction

AH -  current blocking of the pump

EC -  anomalous water temperature

EJ  - an additional protective device has worked

EE -  abnormal water level in the drainage system

EF - defective heat storage unit

H0  - sensor fault (general)

H1 -  defective air temperature sensor

H2 - malfunction of the system electric power sensor

H3 -  malfunction of the high pressure sensor

H4  - low pressure sensor malfunction

H5 - the  compressor does not work. Overload sensor has tripped.

H6 - the  lock sensor has triggered. Compressor overload

H7  - the blocking sensor has worked. Fan overload.

H8  - input voltage sensor has triggered.

H9 - the outdoor temperature sensor has triggered.

HA  - output air sensor triggered

HH-  activated water pump lockout sensor

HC - the hot water sensor has triggered.

HE  -drain level sensor activated

HF  heat storage unit accident

F0-  worked protective devices No. 1 and No. 2

F1  - the protective device of system No. 1 worked

F2  - the protective device of system No. 2 worked

F3 -  high discharge pipe temperature

F6 -  Anomalous heat exchanger temperature

FA  - Inadmissible discharge pressure

FH  - high oil temperature

FC -  invalid suction pressure

FE - unacceptable oil pressure

FF -  Inadmissible Oil Level

J0  - thermistor malfunction

J1  - pressure sensor malfunction (general)

J2 -  faulty current sensor

J3 -  malfunction of the discharge pipe temperature sensor

J4  - sensor malfunction at low pressure saturation point

J5 -  malfunction of the thermistor on the suction pipe

J6 -  malfunction of the thermistor on the heat exchanger (1)

J7  malfunction of thermistor on heat exchanger (2)

J8  Malfunction of a liquid pipe thermistor

J9  - gas pipe thermistor malfunction

JA -  malfunction of the discharge sensor

JH  - oil temperature sensor malfunction

JC -  malfunction of the suction pressure sensor

JE  - oil pressure sensor malfunction

JF  - oil level sensor malfunction

L0  faults in the inverter system

L3  -increase in temperature inside the control box

L4 -increase the temperature of the radiator of the power transistor

L5 -  DC overload at the output (short-term)

L6 -  overload on alternating current at the output (short-term)

L7 -  high input current (multisystem), (common)

L8  electronic thermal relay (delay)

L9 -  warning stop (delay)

LA  - power transistor is faulty

LC  - communication with the inverter of the outdoor unit is faulty

P0  - gas shortage (icing of heat storage equipment)

P1 -  lack of phase, power supply imbalance

P3  - temperature increase inside the control unit

P4 -  malfunction of the radiator temperature sensor (power transistor)

P5 -  DC sensor malfunction

P6 -  malfunction of the sensor for output AC / DC

P7 -  high input current (in a multisystem)

PJ -  incorrect performance setting (outdoor unit)


U0 -  low pressure in the system (gas shortage)

U1 - incorrect phase connection (phase change required)

U2 -  defect of the power supply (low voltage)

U3 -  error in data transfer (general)

U4 -  error in  data transfer between indoor and outdoor units

U5  - communication error between the indoor unit and the remote control

U6  - communication error between indoor units (main and subordinates)

U7  - communication error between outdoor units, or battery

U8  - communication error between control panels

U9 -  error communicating with another system

UA -  incorrect parameter setting

UH  -detection / indoor unit, address not entered.

UC -  incorrect address setting on the CPU

UJ  - communication error with peripheral equipment

UE  - communication error between the indoor unit and the CPU

UF  - installation wiring error / piping

M1  - central control equipment, PCB malfunction

M8  - communication with central control equipment is faulty

MA -  defective connection on central control equipment

MC -  dual address assignment of central control equipment


31 -  defect in the humidity sensor of the circulating air

32 -  defect in humidity sensor

33 -  defective supply air sensor

34  - defect in the temperature sensor of the circulating air

35  - defect in the outside temperature sensor

36  - temperature sensor defect control panel

3A  - defect of the sensor of leakage of water No. 1

3H  - water leakage sensor defect No. 2

3C  - dew condensation sensor defect

40  - defective valve humidifier

41  - defect cold water valve

42  - defect hot water valve

43  - defect of the cold water heat exchanger

44  - defect in the hot water heat exchanger

51  - overload of the supply air fan motor

52  - overload of the motor of the circulating air fan

53  - poor air supply to the inverter

54  - inverter air circulation poor

60 is a  common mistake

61  - PCB malfunction

62 -  anomalous ozone concentration

63 -  malfunction of the pollution sensor

64-  defective room temperature sensor

65-  defective outside temperature sensor

68  - malfunction of the high voltage system

6A  - defective damper system

6H  door switch open

6C - replace the humidifier element

6J  -replace a high-performance filter

6E -  replace odor removal catalyst

6F-  malfunction of the simplified control panel

Comments: 2
  • #2

    Suresh (Sunday, 14 May 2023 09:25)

    Daikin inverter error code 00

  • #1

    BAMBAMG (Tuesday, 12 October 2021 04:42)