Haier HF-346KAME Service Manual page 27

E. Compressor won't stop
Sometimes, the compressor will run continuously(for several hours or
run without end), If the food placed in the refrigerator is not too much, there
may be the following two situations: i) the refrigerator very low, this means
that the control system is probably out of order; ii) the control system works
normally, and there are troubles in the refrigerating system or other parts.
1) Temperature is set improperly
a) The temperature control knob is set to the "coldest" position. This
position is to be used for fast freezing or continuous running, its
temperature for power off is too low, therefore, the compressor won't stop
and the temperature in the refrigerator becomes lower and lower .
b) Inspection method: check the temperature control knob to see
whether it is set in the position "coldest".
2) Thermostat is malfunctioning and makes the compressor running
continuously
Analysis of Trouble
When the thermostat doesn't work normally, it will make the compressor
run continuously, and hence very low temperature will be achieved in the
refrigerator. The fault is generally due to the fact that the contacts of the
thermostat cannot be released.
Remedy
Dismantle the thermostat and make a through checkup, if it is totally out
of functioning, replace it with a new one.
3) evaporation temperature is too high in refrigerating system, resulting
in lower refrigerating capacity and hence continuous running of compressor
Analysis of Trouble
Leakage of refrigerant and clogging in a refrigerating system will directly
affect its refrigerating capacity. Due to the reduction in its refrigerating
capacity, the refrigerator temperature cannot reach its rated value, the
thermostat won't work, thus the compressor runs continuously. When the
evaporation temperature in the system is too high, the temperature sensing
agent in the temperature sensor is also hotter, therefore, the thermostat is
unable to cut off the power supply to the compressor and stop it.
Remedy
If it has been found that the refrigerant in the system is insufficient in
quantity, recharge it with refrigerant. In case clogging occurs, disassemble
the part where it is blocked. If the evaporation temperature is too high,
settle this problem with an appropriate quantity of refrigerant.
4) No stoppage of compressor due to damaged heat-insulation layer
inside case body and/or door seal
Analysis of Trouble
When the heat-insulation layer inside the case body deteriorates or the
door seal is not closely touches the door frame, the temperature in the
refrigerator will rise and makes the compressor running continuously.
Maintenance Service and Trouble Shooting
26