Haier HRN-186 Service Manual page 23

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.
REMEDY
Check the heat-insulation layer for its damaged parts, repair it to improve its heat-insulation property. If
the door has deformed or the door seal is not tightly sealed against the case body, repair them,
respectively.
5) Too much food is placed in the refrigerator, or is placed too densely, resulting in poor ventilation or
poor conditions for temperature sensing, and hence no stoppage of the compressor.
6) Too high ambient temperature, poorer ventilation and heat dissipation make the compressor
running without stop.
F. Electric leakage of refrigerator
1) Slight electric leakage