GREE ELECTRIC GWHDND3EO Service Manual page 35

Service Manual
4. Compressor overload, diacharge protectionmalfunction
Main checking points:
If the eletric expansion valve is connected well or it is broken;
If there is refrigerant leakage;
If the overload protector is broken;
Flow chart:
Replace the
overload
protector
Note: the detection method of the coil of the eletric expansion valve: there is five pieces of coil of the eletric expansion valve,
the resistance of one of them (the leftmost or the rightmost one) is almost the same as the resistance of other terminal (within
). Judge the condition of the electronic expansion valve through detecting these resistance.
100
Installation and Maintenance
If the overload protector is connected well?
no Check the resistance between the two
ends of the overload protector in ambient temperature,
if the resistance is below 1k
If the wiring of the eletric expansion valve
is coonected well?
Check the coil of the eletric
expansion valve, replace
it if it is broken
Eliminate the malfunction
Check the refrigerant status, if there is
refrigerant leakage, recharge it according
to the service manual
Eliminate the malfunction
Start
yes
yes
yes
yes
no
yes
no
Replace outdoor
mainboard
End
no
no
Reconnect according
to the wiring diagram
33