Gree GWHD(18)NK3FO Service Manual page 37

3. Compressor desynchronizing malfunction
Main checking points:
If the pressure of the system is too high;
If the eletric expansion valve is working normally or it is broken;
If the radiation of the unit is good;
Flow chart:
The unit appears desynchronizing
as soon as energizing and starting
The stop duration of the compressor is longer
The wiring of the compressor is
connected properly?
yes
The eletric expansion valve is broken?
yes
Replace the outdoor mainboard
Eliminate the malfunction
Replace the compressor
than 3min?
yes
no
yes
no
End
no
Reconnect the wire properly
no
Eliminate the malfunction
no
Replace the eletric
expansion valve
no
Eliminate the malfunction
yes
yes