Functions and control
When Tpg_indoor begins to rise again, and ice_temp_2İTpg_indoorİ ice_temp_3ć, the frequency of
thecompressor doesn’t change.
When ice_temp_3LJTpg_indoorLJice_temp_4ć, the frequency of the compressor increases at the speed of
1HZ/10seconds.
For example, Tpg_indoorİ0ćˈlast 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_4ć, the compressor recovers.
Domestic air conditioner
22
7.1.5.4˖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).
11ć//ice_temp_4+2
9ć
ice_temp_4 Increasing slowly
9ć//ice_temp_3+2
Keeping the frequency
ice_temp_3 7ć 6ć
ice_temp_2 5ć Decreasingslowly
ice_temp_1 3ć Decreasing rapidly ice_temp_1
0ć Stop
When Tpg_indoor LJ ice_temp_1 ć , the frequency of the compressor decreases at the speed of
1HZ/1second.
When Tpg_indoor LJ ice_temp_2 ć , the frequency of the compressor decreases at the speed of
1HZ/10seconds.
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