Haier HRF10WNDWW, Руководство по обслуживанию, Страница: 17 / 30

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SERVICE MANUAL
Model: HRF10WNDWW/HRF12WNDWW
17
Issue 2009-7-24
Rev. Ref0907S005V0
Chapter 7 Quick check
7-1. Normal phenomena
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
℃
~110
℃
,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 85
℃
~90
℃
,it is very hot ,particularly in summer when the ambient temperature is higher .All
these are normal phenomena .