Service diagnosis
38 Domestic air conditioner
10.3.5 IPM protection
Outdoor display: □★★/ F1 LED1 flash 2 times
Method of
IPM protection is detected by checking the compressor running condition and so on
Malfunction
Detection
Malfunction
Ŷ The system leads to IPM protection due to over current
Decision
Ŷ The compressor faulty leads to IPM protection
Conditions
Ŷ circuit component of IPM is broken and led to IPM protection
Supposed
Ŷ IPM protection dues to the compressor faulty
Causes
Ŷ IPM protection dues to faulty PCB of IPM module
Ŷ Compressor wiring disconnected
Troubleshooting
* Caution
Be sure to turn off power switch before connect or disconnect connector, or
else parts damage may be occurred.
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