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31
(8) Compressor overload, diacharge protection malfunction
Main checking points:
ƽ
If the eletric expansion valve is connected well or it is broken
ƽ
I f there is refrigerant leakage
ƽ
I f the overload protector is broken
Flow chart:
Eliminate the malfunction
End
no
no
no
no
no
yes
yes
Replace outdoor
mainboard
Start
If the overload protector is connected well?
yes
yes
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?
Replace the
overload
protector
Check the coil of the eletric
expansion valve, replace
it if it is broken
Eliminate the malfunction
Reconnect according
to the wiring diagram
Check the refrigerant status, if there is
refrigerant leakage, recharge it according
to the service manual
Note:
The
detection method of the coil of the eletric expansion valve: there
are
five pieces of the 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
100
). Judge the condition of the electronic expansion valve through detecting
the
resistance.
