Type 2: Non-standard defrost (rectify defrost data by the device)
1) If Tr≥6℃, when Tp≤-6℃, enter defrost.
2) If -18℃≤Tr＜-6℃, when Tp≤-6℃, please refer to the following chart.
3) No matter the ambient temperature, when Tp≤-18℃, enter defrost.
2.4 Manual defrost
Indoor sends defrost signal to outdoor, and the outdoor will receive the defrost signal when
compressor is running in heating mode, then enter the defrost process. When outdoor coil
temperature arrives the defrost-end point and the defrost time is over 5 minutes, outdoor will send
the defrost-end signal to finish the defrost.
3. Compressor crankcase heater working condition
By the N.C. (normal close) auxiliary point of AC contactor to control, when compressor stops, the
heater will work; when compressor works, the heater will stop.
4. System protection function
4.1 Anti-freezed protection
-6℃
mbient
Coil tem
.
℃
6℃-18℃
-6℃
-
mbient
Coil tem
.
℃
-
-
-16℃
When compressor has run for over 6 minutes, to prevent indoor evaporator freezing (in cooling/dry
mode), if indoor coil temp. is below -1 degree for over 1 minutes, compressor and outdoor motor will
stop and enter Fan mode. After compressor stops for 9 minutes, and indoor coil temp. rises up to 10
℃, the unit resumes to cooling mode, compressor and outdoor motor will work again.
4.2 Overheat protection
In heating mode, if indoor motor is running and the compressor has run for over 30 seconds, the
Electric control functions
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