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

Haier air conditioner

Edition: 20070116 

- 47-

F4:  Overheat protection for exhaust temperature

Yes

Electrify the machine again and turn it on with

the remote controller, then measure the 

temperature at the exhaust temperature 

sensor of the compressor on the outdoor unit

and check whether the temperature exceeds 

110

shortly after the machine starts up

ć

Measure the temperature at the 

exhaust temperature sensor of the 

compressor on the outdoor unit and 

Malfunctions occur after running for 

some time even though the measured

temperature is below 110

ć.

Pull out the exhaust sensor and measure its 

resistance at standard temperatures. Check

whether the results deviate much from those 

in the resistance-temperature table

1) The cryogen may have 

been leaked during 

installation, or there may 

be leakage in the piping 

system.

2) There may be other 

causes to make the 

exhaust temperature too 

high.

Exhaust temperature 

sensor is broken and 

needs be replaced

The sensor is damaged.

Replace the sensor with a 

new one.

No

No

Yes

Yes

The outdoor mainboard is 

damaged and needs be 

replaced

No