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10.3.5 IPM protection
Outdoor display
LED1 flash 2 times
Method of
IPM protection is detected by checking the compressor running condition and so on
Malfunction
Detection
Malfunction
Decision
Conditions
Supposed
Causes
Troubleshooting
* Caution Be sure to turn off power switch before connect or disconnect connector,
Turn on the unit.
whether the error is displayed before
compressor start?
The
compressor
malfunctions are reported after it has run for a
while.
1 The system may have been over or under charged with gas, which can be judged through the pressure of the
measuring system.
2 The shaft of compressor is seized and the compressor needs replacing.
The system leads to IPM protection due to over current
The compressor faulty leads to IPM protection
circuit component of IPM is broken and led to IPM protection
IPM protection dues to the compressor faulty
IPM protection dues to faulty PCB of IPM module
Compressor wiring disconnected
else parts damage may be occurred.
NO
is
started
normally,
38
YES
but
Seivice diagnosis
The power module is fault,
need replaced
Domestic air conditioner
or
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