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3) Touch and Feel
a) Feel the compressor when running ,its temperature should be generally less than 90°C in the
normal state (it may exceed 90°C in case of running for a longer period of time ).
b) After the compressor has operated normally for 5~10 minutes , touch and feel the condenser ,the
temperature of its upper part should be higher than that of its lower part (or its right part is hotter
than its left part ,depending on the type of condenser coil ),this indicates that the refrigerant is
circulating . If the condenser is not hot, this means the leakage of refrigerant .In case the condenser
radiates heat for only several minutes and then cools down ,this means that the filter and capillary
have been clogged .As for the forced air cooling condenser ,hot air will be blown out of it ;this means
that the system is out of order .
c) Feel the filter's temperature .During the normal operation of refrigerating system ,the temperature
on the filter's surface should be a little higher than the ambient temperature ;if you touch it with your
hand ,you will have a sense of slight heat .In case dew condensation appears due to the fact that its
temperature is obviously lower than the ambient temperature ,this means that most meshes of its
screen has been clogged ,resulting in an obstructed flowing of refrigerant ,thus causing a drop in
temperature due to throttling .
d) Feel the temperature of exhaust gas from the refrigerating system .the exhaust gas should be
very hot and this is the normal working state .For those refrigerator with enclosed type of
compressor refrigerating system, no frost or dew drop will from on the gas suction tube,
otherwise ,there is something wrong in the system (Frosting and dew condensation may appear for
a very short time period when just starting the machine ,this is a normal phenomenon ). Because a
refrigerator is a combination of several components ,they are related and have influence on each
other In case an abnormal phenomenon has been found through the above-mentioned
checkups ,you need not to make a hasty conclusion based on only one abnormal phenomenon .It is
advisable to find out two or more abnormal phenomenon ,or conduct troubleshooting
comprehensively with the aid of instruments or other ways ,because several kinds of troubles may
share a common abnormal phenomenon ,and two or more abnormal phenomena may occur
simultaneously due to a certain trouble .With this method ,you can reject some suspicious troubles
and finally make a correct judgment .
temperature of its upper part should be higher than that of its lower part (or its right part is hotter
than its left part ,depending on the type of condenser coil ),this indicates that the refrigerant is
circulating . If the condenser is not hot, this means the leakage of refrigerant .In case the condenser
radiates heat for only several minutes and then cools down ,this means that the filter and capillary
have been clogged .As for the forced air cooling condenser ,hot air will be blown out of it ;this means
that the system is out of order .
c) Feel the filter's temperature .During the normal operation of refrigerating system ,the temperature
on the filter's surface should be a little higher than the ambient temperature ;if you touch it with your
hand ,you will have a sense of slight heat .In case dew condensation appears due to the fact that its
temperature is obviously lower than the ambient temperature ,this means that most meshes of its
screen has been clogged ,resulting in an obstructed flowing of refrigerant ,thus causing a drop in
temperature due to throttling .
d) Feel the temperature of exhaust gas from the refrigerating system .the exhaust gas should be
very hot and this is the normal working state .For those refrigerator with enclosed type of
compressor refrigerating system, no frost or dew drop will from on the gas suction tube,
otherwise ,there is something wrong in the system (Frosting and dew condensation may appear for
a very short time period when just starting the machine ,this is a normal phenomenon ). Because a
refrigerator is a combination of several components ,they are related and have influence on each
other In case an abnormal phenomenon has been found through the above-mentioned
checkups ,you need not to make a hasty conclusion based on only one abnormal phenomenon .It is
advisable to find out two or more abnormal phenomenon ,or conduct troubleshooting
comprehensively with the aid of instruments or other ways ,because several kinds of troubles may
share a common abnormal phenomenon ,and two or more abnormal phenomena may occur
simultaneously due to a certain trouble .With this method ,you can reject some suspicious troubles
and finally make a correct judgment .
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