Haier HSU-09HSA03/R2(DB) 用户手册

Haier air conditioner

Edition: 20070116 

- 49 -

F1: The protection of IPM

Electrify the machine again and turn it 

on with the remote controller, then 

measure temperature on the module 

radiator and decide whether it is too 

high.

With a multimeter, test whether there 

is diode characteristic between the 

three terminals U/V/W and whether

the two terminals P/N of IPM module

and the diode characteristic is exist.

IPM Module might be poorly 

radiated and need to be recoated 

with heat conducting paste and 

reinstalled.

IPM Module is damaged and 

needs replacing.

The compressor should be 

damaged.

Yes

Yes

No

No

Test with a multimeter, and check

whether the resistance values among 

Phases U, V and W of compressor are 

equal and between 1 and 3O.

IPM Module is damaged and 

needs replacing.

No

Yes