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(8) Compressor overload, discharge protection malfunction
Main checking points:
●
If the electric expansion valve is connected well or it is broken;
●
If there is refrigerant leakage;
●
If the overload protector is broken;
Noted: the detection method of the coil of the electric expansion valve: there is five pieces of the coil of the electric
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 100
Ohm
). Judge the condition of the electronic expansion valve through detecting this resistance.
Start
If the overload protector is
connected well?
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 electric
expansion valve is connected well?
Check the coil of the electric
expansion valve, replace it if it is
Eliminate the malfunction
Check the refrigerant status, if there
is refrigerant leakage, recharge it
according to the service manual
Eliminate the malfunction
Replace outdoor mainboard
End
Replace the overload
protector
Reconnect according
to the wiring diagram
No
No
No
No
No
Yes
Yes
Yes
Yes
