Maintenance Service and Trouble Shooting
temperature sensor has not been installed properly, frequent stoppage is
also likely to occur.
Remedy
Try to adjust the temperature sensor's position until the compressor can
be started and stopped normally. If this cannot be achieved, and the
stoppage still occurs repeatedly, it is most likely that the mechanical parts
or contacts are out of order, disassemble the thermostat, make a thorough
checkup and repair it.
b) Overload of electric motor
Analysis of Trouble
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.
c) Abnormal thermal protection
Analysis of Trouble
The compressor current is within its normal range, but the thermal
protector actuates repeatedly.
Remedy
Replace the thermal protector with a new one.
3) Sudden stoppage due to other causes
Normal Stoppage
Start and stop of the compressor is generally controlled by a thermostat .
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 trouble, care should be taken to differentiate it from
other real troubles in servicing.
D. Compressor won 't start
In case the compressor cannot be started, you must find out the origins
of this trouble through checkup step by step, because probably there are
many causes, including those electrical and mechanical.
1) Inspect the power supply to see whether it is connected to the
compressor circuit.
Analysis of Trouble
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, fine
out its real cause and take correct measures to remove this trouble.
Remedy
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