Haier HSU-12LEK03-Y2 Service Manual page 17

5.2 Function of Main Thermistor
Note : A: Indoor heat-exchange sensor
Indoor
heat-exchange
sensor
HSU-12LEK03-Y2
1.The indoor heat exchanger thermistor is used for anti-icing control .During the cooling
operation, if the heat exchanger temperature in the room where operation is halted
becomes 0°C, it is assumed as icing.
2. The indoor heat exchanger thermistor is used for preventing high temperature and
high temperature expiration protection. During the heating operation , When the temp. of
coil pipe is above 72 ,compressor and outdoor fan motor stop running 2 seconds later,
and inlet air runs as the temp. sensor is off
14
Functions and control
Domestic air conditioner