Toyotomi KURO Mini Service Manual page 112

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:
No
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
34
Start
If the overload protector is connected well?
Yes
Check the resistance between the two
ends of the overload protector in ambient temperature,
if the resistance is below 1k
Yes
If the wiring of the eletric expansion valve
is coonected well?
Yes
Check the coil of the eletric
expansion valve, replace
it if it is broken
Eliminate the malfunction
No
Check the refrigerant status, if there is
refrigerant leakage, recharge it according
to the service manual
Eliminate the malfunction
No
Replace outdoor
mainboard
End
No
Reconnect according
No
to the wiring diagram
Yes
Yes
Service Manual
Installation and Maintenance