Compressor Desynchronizing Malfunction; The Unit Appears Desynchronizing As Soon As Energizing And Starting - York DHM42CMB21S Service Manual

(9) 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 stop duration of the compressor is longer
The eletric expansion valve is broken?
32
The unit appears desynchronizing
as soon as energizing and starting
than 3min?
yes
The wiring of the compressor is
connected properly?
yes
yes
Replace outdoor mainboard
Eliminate the malfunction
no
Replace the compressor
End
no
no
Reconnect the wire properly
no
Eliminate the malfunction
no
Replace the eletric
expansion valve
no
Eliminate the malfunction
yes
yes
yes