Haier HSU109VHG-G Service Manual page 29

When the outdoor environment temperature is higher than 50 ,AC current protection value
decreases by 20AD
5.2.5.5 Antifreezing protection of the indoor heat exchanger
When refrigerating/heating, prevent freezing.
Tpg_indoor
running state).
ce_temp_3+3
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.
5.2.5.6 The frequency limitation of modification rate
In the field which is controlled by high frequency, if the modification rate is not high enough,
the control-driven chip will enter into weak magnetic control, this will help to relieve the problem
of modification rate. If during the course of weak magnetic control, the modification rate is still not
high enough, enter into the control of decreasing frequency until the alarm of modification rate is
relieved.
5.2.5.7 Temperature protection of the outdoor refrigerating coil
When the defrosting temperature and the sensor's temperature are higher than 65
frequency of the compressor decreases 1hz/10seconds. Keep the frequency until it decreases to
the lowest frequency. When the temperatures are lower than 65
the frequency of the compressor. When the temperatures are lower than 60 , relieve the
defrosting temperature protection.
5.2.5.8 Malfunction display and malfunction handling
a) For the complete appliance's malfunctions Annex 2
If there's malfunction with the outdoor unit, the light of the outdoor unit will flash and its frequency
is 1HZ, the number of times is according to the table, when a round of flashing is finished, the
is the minimum value of the effective indoor unit (start it and it is in accord with the
9
6
5
3
0
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
11 //ice_temp_3+5
Increasing slowly
Keeping the frequency
6
Decreasing slowly
Decreasing rapidly
Stop
27
Functions and control
8 //ice_temp_3+2
ice_temp_1
and higher than 60 , keep
Domestic air conditioner
, the