Midea HC-957WEN, Service Manual, Page: 51 / 59

Service Manual_2018-V2.0
51
11. Compressor
11.1Compressor on and off Control specifications
1.1 When one of the following conditions is met, the compressor stops:
1)
Tr ≤ Trt
；
2) The compressor runs continuously for more than 3 hours (Stop 5 minutes);
1.2 When all the following conditions are met, the compressor starts up:
1)
Tr ≥Trk;
2) Compressor downtime is more than 5min.
★
When 1.1 and 1.2 are not satisfied, the compressor maintains the original state
11.2Variable frequency driver board fault analysis
running status of LED Fault cause
not Light not Working
Blink once: light 1S, extinguish1S Standby
Blink once: light 0.5S, extinguish1.5S Overcurrent
Blink twice: light 0.5S, extinguish0.5S, interval
time(extinguish) is 1.5 second
Overvoltage
Blink four times: light 0.5S, extinguish0.5S, interval
time(extinguish) is 1.5 second
Undervoltage
Blink eight times: light 0.5S, extinguish0.5S, interval
time(extinguish) is 1.5 second
LOCK
Blink sixteen times: light 0.5S, extinguish0.5S, interval
time(extinguish) is 1.5 second
Overload protection