GD Midea Refrigeration Equipment Co. Ltd                                   Service manual for K portable Series 
15 
Be care to release the connectors which connect 
to the display board. 
 
4.5 To replace the Main Control board. 
Remove the screws fixing the enclosure cover. 
 
Take care of the wiring diagram on the cover. The 
wiring diagram is important for reference when 
wiring. 
 
Pay attention to the wires in the enclosure. 
 
 
1    2    3    4    5   6   7   8   9   10 
1: Terminate to display board 
2: Terminate to condenser fan motor 
3: Out-put of transformer 
4: Terminate to evaporator fan motor 
5: Terminate to compressor 
6: Terminates (N) to condenser fan motor, electric   
heater, pump, power cord, compressor   
capacitor 
7: Terminate to electric heater 
8: Terminate (L) to power cord 
9: Terminate (L) to pump 
10: Terminate to input of transformer 
Take care to the grounding wires if need to 
disconnect.