Haier HSU-12HSA03/R2(DB) Manuale Utente

Haier air conditioner

Edition: 20070116 

-40 -

5. Trouble shooting

Indoor

Outdoor

Possible Reasons

E1

/

1)Room-temperature sensor

2) Indoor PCB

E2

/

1)Heat-exchange sensor

2)Indoor PCB

F21

With the malfunction, LED1 

on the outdoor mainboard 

blinks 10 times at frequency 

of 1 Hz

1) Defrosting temperature sensor

2) Outdoor PCB

F25

With the malfunction, LED1 

on the outdoor mainboard 

blinks 13 times at frequency 

of 1 Hz

1) Exhaust temperature sensor

2) Outdoor PCB

F6

With the malfunction, LED1 

on the outdoor mainboard 

blinks once at 12 times of 1 

Hz and interval of 2 seconds 

or so.

1) Ambient  temperature sensor

2) Outdoor PCB

E7

With the malfunction, LED1 

on the outdoor mainboard 

blinks 15 times

1)The outdoor mainboard needs 

dehumidification

2)The outdoor mainboard needs 

dehumidification

3)The linking cable between the indoor and 

outdoor units is not well connected or the 

core wires are not well insulated 4)The 

indoor PCB might be broken

5)The outdoor PCB might be broken

6)The SPDU might be broken

F11

With the malfunction, LED1 

on the outdoor mainboard 

blinks17or18 times at 

frequency of 1 Hz

1) The wiring of compressor is incorrect or 

the connection is poor

2)The SPDU might be broken

3) Compressor might be damaged.

F4

With the malfunction, LED1 

on the outdoor mainboard 

blinks 8 times at frequency 

of 1 Hz

1) The cryogen may have been leaked 

during installation, or there may be leakage 

in the piping system.

2)Exhaust temperature sensor is broken

3) The outdoor mainboard is damaged and 

needs be replaced