Haier AU342XHERA, AU282XHERA installation manual Failure State Trouble Possible Reasons Code

Models: AU282XHERA AU342XHERA

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Trouble shooting

FAILURE

STATE OF

TROUBLE

POSSIBLE REASONS

CODE

LED 5-4-3-2-1

SHOOTING

 

1

 

Faulty defrost sensor Te

Sensor disconnected, or broken, or short circuit

2

 

Faulty sensor Tao

Sensor disconnected, or broken, or short circuit

3

 

Faulty sensor Ts

Sensor disconnected, or broken, or short circuit

4

 

Faulty sensor Td

Sensor disconnected, or broken, or short circuit

 

 

 

Over current of the system, or broken of the current

5

 

Input overcurrent

sensor,or malfunction with indoor or outdoor fan

 

 

 

motors, or faulty PCB.

 

 

Abnormal communication Wrong connection, or the wires be disconnected, or

6

 

between indoor and outdoor

wrong address setting of indoor units, or faulty

 

 

units

PCB, or faulty power supply

 

 

 

High pressure switch is disconnected, or high

 

 

System high pressure

pressure switch worked, or Tc too high and faulty

9

 

outdoor fan motor when cooling, or faulty indoor

 

protection

 

 

fan motors when heating, or refrigerant

 

 

 

 

 

 

overabundance

 

 

 

Low pressure switch is disconnected, or low

10

 

System low pressure

pressure switch worked, or Te too low and faulty

 

protection

outdoor fan motors when heating, or faulty indoor

 

 

 

 

 

fan motor when cooling, or refrigerant shortage

 

 

 

IPM over current, or short circuit, or IPM

11

 

IPM protection

temperature too high, or IPM input voltage too

 

 

 

low,or faulty SPDU(or ISPM).

12

 

EEPROM fault

Faulty outdoor unit PCB

 

 

Over hot protection of

Serious lack of refrigerant of the system, or the

13

 

ambient temperature too high, or PMVs be

 

compressor

 

 

blocked

 

 

 

14

 

Over hot protection of SPDU Ambient tempreatrue too high, or outdoor fan be

 

(or ISPM)

blocked, or bad air circulation of outdoor unit

 

 

15

 

DC fan motor fault

Fan is blocked, or the terminal is disconnected

 

from the PCB

 

 

 

16

 

Faulty 4-way valve

Coil of 4-way valve is disconnected, or faulty

 

switching on

outdoor PCB

 

 

17

 

Faulty sensor Tc

Sensor disconnected, or broken, or short circuit

21

 

Faulty sensor Toci

Sensor disconnected, or broken, or short circuit

23

 

Low voltage protection

VDC<194V, too low voltage from power source

24

 

High voltage protection

VDC>400V, too high voltage from power source

25

 

Abnormal communication

Communication cables broken, or not be well

 

between main PCB and

connected, or faulty main PCB, or faulty SPDU(or

 

 

SPDU(or ISPM)

ISPM)

26

 

Compressor be locked

Faulty compressor or SPDU(or ISPM)

27

 

Compressor vibration too big Faulty compressor

28

 

Compressor lose position

Faulty SPDU(or ISPM)

29

 

Faulty compressor start

Faulty compressor or SPDU(or ISPM)

30

 

Faulty position checking

Faulty SPDU(or ISPM)

31

 

circuit

Faulty compressor or SPDU(or ISPM)

 

Compressor broken

Take off the plastic cover on the right side of the unit, you can find the LEDs near the communication terminal. Symbol means the LED is ON, and symbol means the LED is OFF.

17

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Image 19
Haier AU342XHERA, AU282XHERA installation manual Failure State Trouble Possible Reasons Code