Haier AS18ND1HRA-WHITE Service Manual page 78

During the starting process of the compressor, if the AC current is greater than 7A, the frequency of
the compressor increases at the prohibited speed.
During the starting process of the compressor, if the AC current is greater than 6.5A, the frequency of
the compressor increases at the speed of no faster than 0.1HZ/second.
7.1.4.4 The protection function of AC current:
During the starting process of the compressor, if the AC current is greater than 12A for 3 seconds,
stop the compressor and alarm, after 3 minutes, start it again, if such state appears 3 times in 20
minutes, stop the compressor and alarm, and confirm the malfunction. Then continue to run it only
after the the power is off.
During the starting process of the compressor, if the AC current is greater than 9A, 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 8A, 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 7A, the frequency of
the compressor increases at the prohibited speed.
During the starting process of the compressor, if the AC current is greater than 6.5A, 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.
(1) When the outdoor environment temperature is higher than 104°F, AC current protection value
decreases by 1A.
(2) When the outdoor environment temperature is higher than122°F, AC current protection value
decreases by 2.5A.
7.1.4.5 Anti-freezing protection of the indoor heat exchanger
When cooling/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).
ice_temp_3+3 48.2°F
ice_temp_3 44.6°F
ice_temp_2 41°F
37.4
ice_temp_1 °F
32°F
When Tpg_indoor〈 ice_temp_33.8°F, the frequency of the compressor decreases at the speed of
1HZ/1second.
When Tpg_indoor〈 ice_temp_35.6°F , the frequency of the compressor decreases at the speed of
1HZ/10seconds.
When Tpg_indoor begins to rise again, and ice_temp_2≤Tpg_indoor≤ ice_temp_37.4 °F, the frequency
of the compressor doesn't change.
51.8°F //ice_temp_3+5
Increasing slowly
46.4°F //ice_temp_3+2
Keeping the frequency
44.6°F
Decreasing slowly
Decreasing rapidly ice_temp_1
Stop
19
Functions and control
Domestic air conditioner