Haier HRN-186 Service Manual page 13

normal state (it may exceed 90 ℃ in case of running for a longer period of time ).
b) After the compressor has operated normally for 5~10 minutes , ouch 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 .
5.4 Compressor doesn't start