Haier J Series Service Manual page 22

7.1.3.5
Antifreezing protection of the indoor heat exchanger
When refrigerating/heating, prevent freezing.
Tpg_indoor
running state).
c e _ e t m
ice_temp_3
ice_temp_2
ice_temp_1
When Tpg_indoor
1HZ/1second.
When Tpg_indoor
1HZ/10seconds.
When Tpg_indoor begins to rise again, and ice_temp_2 =Tpg_indoor = ice_temp_3 , the
frequency of thecompressor doesn't change.
When ice_temp_3 Tpg_indoor ice_temp_3+3 , the frequency of the compressor increases at
the speed of 1HZ/10seconds.
For example, Tpg_indoor<= 0
underload malfunction, but don't send malfunction report to the indoor.
The compressor stops for more than 3 minutes, Tpg_indoor> ice_temp_3+2 , the compressor
recovers.
7.1.3.6
Temperature protection of the ou tdoor refrigerating coil
When the defrosting temperature and the sensor's temperature are higher than 64
frequency of the compressor decreases 1hz/10seconds.
the frequency of the compressor. When the temperatures are higher than 70 , relieve the
defrosting temperature protection.
7.1.4 The outdoor fan control (exchange fan)
When the fan is changed among every airflow speed (including stop blowing), in order to avoid
the airflow speed from skipping frequently, it must be kept under each mode for over 30 seconds.
is the minimum value of the effective indoor unit (start it and it is in accord with the
9
p _ 3 + 3
7
3
3
1
ice_temp_1 , the frequency of the compressor decreases at the speed of
ice_temp_2 , the frequency of the compressor decreases at the speed of
last for 2 minutes, and then the outdoor unit will stop, and report
When the temperatures are lower than 64
11 //ice_temp_3+5
n I c e r a s n i g
8 //ice_temp_3+2
Keeping the frequency
6
Decreasing slowly
Decreasing rapidly
Stop
20
Functions and control
s o l w y l
ice_temp_1
and higher than 60 , keep
Domestic air conditioner
, the