Haier 2U14CS4ERA, Service Manual

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11 //ice5
9
ce3 Increasing slowly
8 //ice2
Keeping the frequency
ice_temp_3 6 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.
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 ice3 , the frequency of the compressor increases at
the speed of 1HZ/10seconds.
For example, Tpg_indoor<= 0
last for 2 minutes, and then the outdoor unit will stop, and report
underload malfunction, but don’t send malfunction report to the indoor.
The compressor stops for more than 3 minutes, Tpg_indoor> ice2 , the compressor
recovers.
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.
If the socket temperature is higher than 120 ,the outdoor unit will stop and report
malfunction(the LED light flashing 36 times).The compressor stops for more than 3 minutes, the
compressor recovers.
When the Defrost temperature and the sensor’s temperature are higher than 65 , the frequency
of the compressor decreases 1hz/10seconds. Keep the frequency until it decreases to the lowest
frequency. When the temperatures are lower than 65
and higher than 60 , keep the
frequency of the compressor. When the temperatures are lower than 60 , relieve the Defrost
temperature protection.
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
7.1.5.6 The frequency limitation of modification rate
7.1.5.7 The socket protect
7.1.5.8 T emperature protection of the outdoor refrigerating coil
7.1.5.9 Malfunction display and malfunction handling
Functions and Control
Domestic air conditioner
20