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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,
NO
else parts damage may be occurred.
YES
34
Service diagnosis
NO
Domestic air conditioner
or
YES
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