Circuit diagrams
Domestic air conditioner
11.4.11 Loss of synchronism detection
Inverter side current detection is abnormal
Within 3 minutes after the machine is
supplied with power and turned on with
the remote controller, check whethe
the compressor can start up
1. The wiring of compressor is incorrect
or the connection is poor;
2. The compressor is damaged
At first, the compressor start up ,soon the
compressor stopped with the LED1 on the
outdoor PCB blinks˄1Hz˅19/18 times
IPM Module is damaged and needs
replacing.
the Malfunctions exist also, the
compressor is damaged replace a
new one
YES
NO
YES
Malfunction unsolved
Maybe there is some disturbance
Method of
malfunction detection
Malfunction detection
conditions
Troubleshooting
The position of the compressor rotor can not detected normally
when the wiring of compressor is wrong or the connection is poor; or the compressor
is damaged
ŶFaulty The wiring of compressor
ŶFaulty compressor
ŶFaulty PCB
Supposed causes
* Caution
Be sure to turn off power switch before connect or disconnect connector, or else
parts damage may be occurred.
LED1 flash 18 times
LED1 flash 19 times
Outdoor diplay
39
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