Maintenance Service and Trouble Shooting
5 Normal Phenomena
—Not Troubles for Refrigerators
In a domestic refrigerator, there is not only a complicated electric control system, but
also a refrigerating system that is difficult to discern whether it is in a good working
condition. Both the systems are related and affect each other. If a certain part of a
refrigerator works abnormally .Its refrigerating efficiency will decrease .operation
properties will become unstable, or even it cannot be used normally for those serious
cases.
Refrigerators are generally of larger volume, once troubles appear, to send them to a
service department is really a tough thing, if such is the case, the user will always be in
suspense. Sometimes, normal phenomena will be erroneously regarded as troubles.
Therefore, before we deal with the topics of frequently occurring troubles of
refrigerators and their remedies ,we should firstly give a brief account of some normal
phenomena which are not troubles .In case any one of such phenomena occurs ,there
is no need to worry about it ,and the user can use it at total ease .
1).When the compressor of a refrigerator has just stopped running ,a rumbling sound
can be heard from inside its evaporator .This is a sound caused by the flowing of
refrigerant in the evaporator tubing .Because the pressure difference is still greater
after the compressor has just stopped running ,the refrigerant will flow for a certain
time , therefore ,this sound is a normal phenomenon.
2).A click sound can often be heard from the refrigerator .This is a normal sound
produced by the pull-in or release of the armature of a current deadweight start relay
when starting the compressor The compressor motor will produce a slight and uniform
sound while it is running .This sound is not easy to be heard in the daytime ,but of
course it can be heard distinctly at night.
3).The compressor consists of an electric motor and a compressing apparatus .During
its normal operation ,the motor's stator core and windings will rise to a temperature in
the range of 100
℃
~130
℃
,and the temperature of the piston and cylinder of the
compressing mechanism can also reach as above 100
℃
due to the heat produced
when compressing refrigerant .Most of the heat radiates to the air through the
compressor casing .therefore ,its casing is generally at a temperature between 78
℃
~95
℃
,it is very hot .particularly in summer when the ambient temperature is higher .All
these are normal phenomena .
•
4).For the direct cooling refrigerator ,a kind of irregular crack sound can be often heard
when the compressor is running for a certain period of time or has just stopped its
running .This sound is caused by the stress relief due to expansion and contraction
when temperature changes ,and will not
affect the normal application of refrigerator.
6 Common Troubles in Refrigerators and Their Remedies
Causes for troubles occurring in refrigerators are closely related to the quality of
components and workmanship in assembling by manufacturers as whether
refrigerators are properly used and maintained .The parameters generally used to
express the working conditions of a refrigerator include the temperature inside the
refrigerator .operation rate ,electric power consumption ,noise level ,and other
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