Seivice diagnosis
Domestic air conditioner
11.4.5 IPM protection
Electrify the machine again and turn it on
with the remote controller,If malfunctions
are reported before or upon the compresso
r
being started up,
IPM Module is damaged and
needs replacing.
1ǃThe system may have been over or under charged with gas, which can be judged through the pressure of the
measuring system.
2ǃThe shaft of compressor is seized and the compressor needs replacing.
<(6
12
The compressor is started normally, but
malfunctions are reported after it has run for some
time.
Malfunction unsolved
IPM protection is detected by checking the compressor running condition and so on
ŶThe system leads to IPM protection due to over current
ŶThe compressor faulty leads to IPM protection
Ŷcircuit component of IPM is broken and led to IPM protection
ŶIPM protection dues to the compressor faulty
ŶIPM protection dues to faulty PCB of IPM module
ŶCom
pressor wiring disconnected
* Caution
Be sure to turn off power switch before connect or disconnect connector, or else
parts damage may be occurred.
.
LED1 flash 2 times
Outdoor diplay
Method of
malfunction detection
Malfunction detection
conditions
Troubleshooting
Supposed causes
51
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