Refrigerator Service Manual

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

Maintenance Service and Trouble Shooting