Service diagnosis
34 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
■
The system leads to IPM protection due to over current
Decision
■
The compressor faulty leads to IPM protection
Conditions
■
circuit component of IPM is broken and led to IPM protection
Supposed
■
IPM protection dues to the compressor faulty
Causes
■
IPM protection dues to faulty PCB of IPM module
■ Compressor wiring disconnected
Troubleshooting
* Caution
Be sure to turn off power switch before connect or disconnect connector, or
else parts damage may be occurred.
NO
YES
NO
YES
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