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Overload of electric motor
Analysis of Problem
Probably, too many things have been put into the refrigerator, and hence the
thermal load exceeds its refrigerating capacity; or in case the power supply
voltage drops considerably, the current flowing through the motor will increase
drastically making the thermal protector actuate and the fuse blown, and hence
the motor stops running. If the motor is still running continuously in such a case,
its windings will be burned out.
Remedy
Reduce the thermal load, pay attention to the variation in
voltage of the power supply.
Abnormal thermal protection
Analysis of Problem
The compressor current is within its normal range, but the
thermal protector actuates repeatedly.
Remedy
Replace the thermal protector with a new one.
Sudden stoppage due to other causes.
Normal Stoppage
Thermostat generally controls start and stop of the compressor. When the
temperature in the refrigerator reaches its desired value, the thermostat will shut
down the compressor automatically. Never take this normal operation as a
problem; care should be taken to differentiate it from other real problems in
servicing.
Compressor won 't start.
In case the compressor cannot be started, you must find out the origins of this
trouble through systematic checkup, because probably there are many causes,
including the electrical and mechanical parts.
A) Inspect The Power Supply To See Whether It Is Connected To The
Compressor Circuit.
Analysis of Problem
In case the compressor cannot be started, this will generally exhibit in the power
supply circuit, for instance, power failure, poor contact of switch, and blown fuse.
Make a comprehensive analysis of these phenomena, find out its real cause and
take corrective measures to resolve the problem.
