Haier HRFN-250DAA Service Manual page 23

normally, and there are troubles in the refrigerating
system or other parts.
1) Temperature is set improperly
a) The temperature contr ol knob is set to the "coldest" positio n. This position is to be used for fast
freezing or continuous ru nning, it s temperature for pow er of f is too low, therefore, the compressor
won't stop and the temperature in the refrigerator becomes lower and lower .
b) Inspection method: check the te mperature control knob to see whet her 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) eva poration temperat ure is too high in refri gerating system, resulting in lower refrigeratin g
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 it s refrigeratin g capacity, the refrige rator temperatu re cannot re ach its rated
value, the thermost at w on't work, thus the compressor runs continuous ly. When the evapor ation
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 refriger ant in the system is insuf ficient in q uantity, recharge it with
refrigerant. In case clogging occurs, disassemble the part w here it is block ed. If the evap oration
temperature is too high, settle this problem with an appropriate quantity of refrigerant.
4) No stopp age of compressor due to damage d heat-insulation laye r inside case bod y and/or door
seal
ANALYSIS OF TROUBLE
When the heat-insulation laye r insid e the case body deteriorates or the door seal i s 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 ha s deformed or the door seal is not ti ghtly sealed against the case body , rep air them,
respectively.
5) Too much food is placed in the refrigerato r, or is placed too d ensely, resulting in poor ventilation or
poor conditions for temperature sensing, and hence no stoppage of the compressor.
6) Too high ambient te mperature, poor er ventilation and heat dissip ation make th e compressor
running without stop.
F. Electric leakage of refrigerator
1) Slight electric leakage