Johnson Controls YJHJXH018BARR-FX, Service Manual

Page: 27 / 112

Domestic Air Conditioner 25
During the starting process of the compressor, if the current of the compressor is greater than 17.5A
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 16.5A, 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 15.5A, 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 than14.5A, the frequency
of the compressor increases at the prohibited speed.
During the starting process of the compressor, if the AC current is greater than 13.5A, the frequency
of the compressor increases at the speed of no faster than 0.1HZ/second.
5.2.5.4 The protection function of AC current:
During the starting process of the compressor, if the AC current is greater than 16.5A, 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 15.5A, 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 14.5A, the frequency
of the compressor increases at the prohibited speed.
During the starting process of the compressor, if the AC current is greater than 13.5A, 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.
When the outdoor environment temperature is higher than 40 , AC current protection value
decreases by 25AD
When the outdoor environment temperature is higher than 46 ,AC current protection value
decreases by 15AD
When the outdoor environment temperature is higher than 50 ,AC current protection value
decreases by 35AD
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 //ice5
9
ice3 Increasing slowly
8 //ice2
Keeping the frequency
ice_temp_3 7 6
ice_temp_2 5 Decreasing slowly
ice_temp_1 3 Decreasing rapidly ice_temp_1
0 Stop
When Tpg_indoor ice_temp_1 , the frequency of the compressor decreases at the speed of
1HZ/1second.
When Tpg_indoor ice_temp_2 , the frequency of the compressor decreases at the speed of
1HZ/10seconds.
Funcitions and Control
YJHJZH018BARRAFX