Service Diagnosis
50
10.4.11 Loss of synchronism detection (Compressor position detection circuit fault)
Outdoor Display
F11 LED1 flash 18 times
F28 LED1 flash 19 times
The position of the compressor rotor can’t detected normally
When the wiring of compressor is wrong or the connection is poor;
Or the compressor is damaged
■
Faulty The wiring of compressor
■
Faulty compressor
■
Faulty PCB
* Caution: Be sure to turn off power switch before connect or disconnect connector,
or parts damage may be occurred.
Conditions
Decision
Malfunction
Method of
Malfunction
Detection
Trouble
shooting
Malfunction
unsolved
Maybe there is some disturbance
Malfunctions exist also, the
compressor is damaged replace
a new one
IPM module is damaged and
needs replace.
The wiring of compressor is incorrect or
the connection is poor;
The compressor is damaged
Within 3 minutes after the machine is
supplied with power and turned on with
the remote control, check whether the
compressor can start up
NO
YES
YES
At first, the compressor start up, soon
the compressor stopped with the LED1
on the outdoor PCB blinks (1Hz) 19/18
times
Supposed
Causes
