0907S005V0
Remedy
Dismantle it to repair, or replace it with a new one.
c) Poor electric contactor in thermostat
Analysis of Trouble
Burnout of contactor and leakage of temperature sensing agent may occur generally.
Remedy
Replace the old with a new one.
d) Check the terminals for loose connection and electric circuits for other abnormal phenomena.
5) Mechanical faults of compressor
a) Seizing of shaft
This phenomenon is caused mostly by poor lubrication, such ad insufficient quantity of lubricant,
clogging in the lubricant oil line, or intermittent lubricant oil supply. Dirt and other impurities in the
lubricant oil will increase its viscosity and cause the shaft to be seized. Copper plating may also result
in seizing of shaft.
b) Seizing of piston
This is caused by too small fit clearance between the piston and cylinder or expansion due to heat.
Judgment of seizing shaft and piston After the refrigerator has been powered on, the compressor
will not start and run, but a slight hum sound can be heard, and several seconds later, thermal
protective relay will actuate and make the contacts open; this process will occur repeatedly, but the
compressor cannot be started.
7-3-3. 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
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