Haier HSU-12HSA03/R2(DB) F1: The protection of IPM, Haier air conditioner, Yes No Yes, Edition

Haier air conditioner Edition: 20070116

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.

No

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.

Yes

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.

No

The compressor should be damaged.

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Yes

No

Yes

IPM Module might be poorly radiated and need to be recoated with heat conducting paste and reinstalled.

IPM Module is damaged and needs replacing.

IPM Module is damaged and needs replacing.