Haier 1U12BS3ERA - Page 22

 Functions and control 
 Domestic air conditioner
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 40ć, AC current protection value
decreases by 1A.
(2) When the outdoor environment temperature is higher than 50ć, 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).
11ć//ice_temp_3+5
ice_temp_3+3 9ć
Increasing slowly
8ć//ice_temp_3+2
Keeping the frequency
ice_temp_3 7ć 7ć
ice_temp_2 5ć Decreasing slowly
ice_temp_1 3ć Decreasing rapidly ice_temp_1
0ć Stop
When Tpg_indoorLJ ice_temp_1ć, the frequency of the compressor decreases at the speed of
1HZ/1second.
When Tpg_indoorLJ ice_temp_2ć, the frequency of the compressor decreases at the speed of
1HZ/10seconds.
When Tpg_indoor begins to rise again, and ice_temp_2İTpg_indoorİ ice_temp_3ć, the frequency
of the compressor doesn’t change.
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