Common DAIKIN AC Error Code Lists

DAIKIN VRV air conditioning indoor and outdoor units
Figure 1: DAIKIN air conditioning units.


DAIKIN air conditioner/air conditioning system malfunction codes consist of one letter or number plus one number or letter. The letters include A, C, E, H, F, J, L, P, U, and M, and the numbers include 0, 1, 2, 3, 4, 5, 6, 7, 8, and 9. These codes are divided into indoor unit related, outdoor unit related, system related codes and others. The following is a detailed introduction to them.

1. DAIKIN AC Common System Error Codes

1.1 U-Series

U-series

No.

Code

Code meaning

1

U0

Low pressure drop caused by insufficient refrigerant or electronic expansion valve failure

2

U1

Voltage phase reverse or loss

3

U2

Abnormal power supply voltage

4

U3

Monitor signal transmission error

5

U4

Communication failure between indoor and outdoor units or between outdoor and BS units

6

U5

Communication failure between the remote control and indoor unit, remote control board failure or remote control setting error

7

U6

Communication failure between indoor units

8

U7

Communication failure between outdoor units, or between outdoor unit and ice thermal storage unit

9

U8

Communication failure between main and sub remote controllers, combination error of other indoor unit/remote control in the same system

10

U9

Communication failure between other indoor and outdoor units, or between other BS and indoor/ outdoor unit in the same system

11

UA

Combination error of indoor unit/BS/outdoor unit, setting error of spare parts PCB when replaced

12

UH

Improper connection of transmission lines between outdoor units

13

UC

Centralized address setting error

14

UJ

Attached equipment transmission error

15

UE

Communication error between indoor unit and centralized control device

16

UF

Indoor and outdoor check operation error, poor communication between outdoor units



Table 1: DAIKIN AC error code U-series.

1.2 M-Series

No.

Code

Code meaning

1

M0

Centralized remote controller PCB failure

2

M1

PCB failure

3

M8

Poor communication between centralized remote control devices

4

MA

Improper combination of centralized remote control devices

5

MC

Centralized remote controller address setting error



Table 2: DAIKIN AC error code M-series.

2. DAIKIN AC Indoor Unit Error Codes

2.1 A-Series

No.

Code

Code meaning

1

A0

External protection devices activated

2

A1

Defective indoor PCB

3

A2

Interlock error for fan

4

A3

Drain level system error

5

A4

Heat exchanger (1) temperature error

6

A5

Heat exchanger (2) temperature error

7

A6

Fan motor locked, overloaded, overcurrent

8

A7

Swing flap motor error

9

A8

Overcurrent of AC input

10

A9

Electronic expansion valve failure

11

AA

Heater overheated

12

AH

Dust collector/air filter failure

13

AJ

Capacity setting error (Indoor)

14

AE

Insufficient water supply

15

AF

Humidifier error



Table 3: DAIKIN AC error code A-series.

2.2 C-Series

No.

Code

Code meaning

1

C0

Sensor error

2

C3

Drain water sensor error

3

C4

Heat exchanger (1) (liquid pipe) thermistor error

4

C5

Heat exchanger (2) (liquid pipe) thermistor error

4

C6

Sensor system error of fan motor locked, overload

6

C7

Swing flap motor sensor error

7

C8

AC input overcurrent sensor error

8

C9

Suction air thermistor error

9

CA

Discharge air thermistor error

10

CH

Contamination sensor error

11

CC

Humidity sensor error

12

CJ

Remote control temperature sensor error

13

CE

Radiation sensor error

14

CF

High pressure switch failure



Table 4: DAIKIN AC error code C-series.

3. DAIKIN AC Outdoor Unit Error Codes

3.1 H-Series

No.

Code

Code meaning

1

H0

Sensor failure

2

H1

Air temperature thermistor failure

3

H2

Power sensor failure

4

H3

High pressure switch error

5

H4

Low pressure switch error

6

H5

Compressor motor overload sensor error

7

H6

Compressor motor overcurrent sensor error

8

H7

Overload or overcurrent sensor of fan motor is abnormal

9

H8

AC input overcurrent sensor error

10

H9

Outdoor air thermistor error

11

HA

Discharge air thermistor error

12

HH

Water pump motor overcurrent sensor error

13

HC

Water temperature sensor error

14

HE

Drain water sensor error

15

HF

Ice thermal storage unit error



Table 5: DAIKIN AC error code H-series.

3.2 E-Series

No.

Code

Code meaning

1

E0

Protection devices activated

2

E1

Defective outdoor unit PCB

3

E3

High pressure switch activated

4

E4

Low pressure switch activated

5

E5

Inverter compressor motor overload

6

E6

Standard compressor motor overcurrent

7

E7

Fan motor overload or overcurrent

8

E8

AC input overcurrent

9

E9

Electronic expansion valve failure

10

EH

Water pump motor overcurrent

11

EC

Abnormal water temperature

12

EJ

Option protection device activated

13

EE

Abnormal drainage

14

EF

Ice thermal storage unit error



Table 6: DAIKIN AC error code E-series.

3.3 F-Series

No.

Code

Code meaning

1

F0

NO.1 and NO.2 common protection device operates

2

F1

NO.1 protection device operates

3

F2

NO.2 protection device operates

4

F3

Discharge pipe temperature abnormal

5

F6

Heat exchanger (1) temperature abnormal

6

FA

Discharge pressure abnormal

7

FH

Oil temperature abnormal

8

FC

Suction pressure abnormal

9

FE

Oil pressure abnormal

10

FF

Oil level abnormal



Table 7: DAIKIN AC error code F-series.

3.4 L-Series

No.

Code

Code meaning

1

L0

Inverter system failure

2

L3

Temperature rise in a switch box

3

L4

Radiation fin temperature too high, inverter cannot cooled

4

L5

Compressor motor grounded or short circuit, inverter board failure

5

L6

Compressor motor grounded or short circuited

6

L7

Overcurrent of all inputs

7

L8

Compressor overcurrent, compressor motor disconnection

8

L9

Stall prevention failure (startup), compressor locked, etc.

9

LA

Power transistor error

10

LC

Communication failure between inverter and outdoor control unit



Table 8: DAIKIN AC error code L-series.

3.5 J-Series

No.

Code

Code meaning

1

J0

Refrigerant temperature sensor error

2

J1

Pressure sensor error

3

J2

Current sensor error

4

J3

Discharge pipe thermistor error

5

J4

Low pressure equivalent saturated temperature sensor system failure

6

J5

Suction pipe thermistor error

7

J6

Heat exchanger (1) thermistor error

8

J7

Heat exchanger (2) thermistor error

9

J8

Oil equalizing pipe or liquid pipe thermistor error

10

J9

Double tube heat exchanger outlet or gas pipe thermistor error

11

JA

Discharge pipe pressure sensor error

12

JH

Oil temperature sensor error

13

JC

Suction pipe pressure sensor error

14

JE

Oil pressure sensor error

15

JF

Oil level sensor error



Table 9: DAIKIN AC error code J-series.

3.6 P-Series

No.

Code

Code meaning

1

P0

Shortage of refrigerant (thermal storage unit)

2

P1

Power supply voltage unstable, phase loss

3

P3

Temperature rise sensor error in a switch box

4

P4

Radiation fin temperature sensor error

5

P5

DC current sensor error

6

P6

C or DC output current sensor error

7

P7

Total input current sensor error

9

PC

Capacity setting error (Outdoor)



Table 10: DAIKIN AC error code P-series.

4. DAIKIN AC Other Error Codes

4.1 3-Series

No.

Code

Code meaning

1

31

Return air humidity sensor error

2

32

Outside air humidity sensor error

3

33

Supply air temperature sensor error

4

34

Return air temperature sensor error

5

35

Outside air temperature sensor error

6

36

Remote controller temperature sensor error

7

3A

Water leakage sensor 1 error

8

3H

Water leakage sensor 2 error

9

3C

Dew condensation sensor error



Table 11: DAIKIN AC error code 3-series.

4.2 4-Series

No.

Code

Code meaning

1

40

Humidification valve error

2

41

Chilled water error

3

42

Hot water valve error

4

43

Chilled water heat exchanger failure

5

44

Hot water heat exchanger failure



Table 12: DAIKIN AC error code 4-series.

4.3 5-Series

No.

Code

Code meaning

1

51

Supply air fan motor overcurrent or overload

2

52

Return air fan motor overcurrent or overload

3

53

Inverter system failure (supply air side)

4

54

Inverter system failure (return air side)



Table 13: DAIKIN AC error code 5-series.

4.4 6-Series

No.

Code

Code meaning

1

60

All system error

2

61

PC board failure

3

63

Contamination sensor error

4

64

Indoor air thermistor error

5

65

Outdoor air thermistor error

6

68

HVU (dust collection unit) failure

7

6A

Damper system error

8

6H

Door switch failure

9

6C

Replace the humidification element

10

6J

Replace the high efficiency filter

11

6E

Replace the deodorization catalyst



Table 14: DAIKIN AC error code 6-series.
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