Wiring Diagrams
27
Domestic Air Conditioner
5.2.5.4 The protection function of AC current:
During the starting process of the compressor, if the AC current is greater than 15A, the frequency of
the compressor decreases at the speed of 1HZ/second.
During the starting process of the compressor, if the AC current is greater than 13A, the frequency of
the compressor decreases at the speed of 0.1HZ/second.
During the starting process of the compressor, if the AC current is greater than 11A, the frequency of
the compressor increases at the prohibited speed.
During the starting process of the compressor, if the AC current is greater than 10A, the frequency of
the compressor increases at the speed of no faster than 0.1HZ/second.
Remarks: when the outdoor temperature is high, there’s compensation for AC current protection.
When the outdoor environment temperature is higher than 104°F, AC current protection value
decreases by 10AD
When the outdoor environment temperature is higher than 115°F,AC current protection value
decreases by 15AD
When the outdoor environment temperature is higher than 122°F,AC current protection value
decreases by 20AD
5.2.5.5 Antifreezing protection of the indoor heat exchanger
When refrigerating/heating, prevent freezing.
Tpg_indoor
is the minimum value of the effective indoor unit (start it and it is in accord with the
running state).
11
//ice_temp_3+5
ice_temp_3+3 48°F
Increasing slowly
//ice_temp_3+2
Keeping the frequency
ice_temp_3 43°F
ice_temp_2 41°F Decreasing slowly
ice_temp_1 37°F Decreasing rapidly ice_temp_1
32°F Stop
When Tpg_indoor
ice_temp_32°F , the frequency of the compressor decreases at the speed of
1HZ/1second.
When Tpg_indoor
ice_temp_36°F, the frequency of the compressor decreases at the speed of
1HZ/10seconds.
When Tpg_indoor begins to rise again, and ice_temp_36
Tpg_indoor ice_temp_37°F, the frequency
of thecompressor doesn’t change.
When ice_temp_37
Tpg_indoor ice_temp_37+3°F , the frequency of the compressor increases at the
speed of 1HZ/10seconds.
For example, Tpg_indoor
0 last for 2 minutes, and then the outdoor unit will stop, and report
underload malfunction, but don’t send malfunction report to the indoor.
The compressor stops for more than 3 minutes, Tpg_indoor> ice_temp_37+2°F , the compressor
recovers.
46°F
43°F
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