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1. COMMON PROBLEMS OF A REFRIGERATOR AND THEIR SOLUTIONS
Refrigerator problems are closely related to the quality of components, level of
workmanship, and owner maintenance. The parameters generally used to
determine the working conditions of a refrigerator include the temperature inside
the refrigerator, the operating rate, electrical power consumption, noise level,
and other functional indices. If any of these indices passes their permissible
range, there is a fault with the refrigerator.
During the entire service life of a refrigerator, the probability of problems
occurring within a specific time is called its failure rate. A comparison between
the control circuit system of a refrigerator and its refrigerating system indicates
that the failure rate of the former is higher. When troubleshooting, the first thing
you must do is to determine whether the source of the problem is the control
system or the refrigerating system.
There is usually no troubleshooting instrument for the domestic refrigerator. The
location and nature of problems must therefore be determined according to their
respective features. Experience in servicing is very important for troubleshooting.
Well-experienced service technicians can correctly identify and solve problems
based on their comprehensive analysis of the characteristics of the particular
problems as well as the operating conditions for various kinds of refrigerators.
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Three Essential Things To Note During A Checkup
Look
a) Check the tubing of the refrigerating system for cracks and various welding
points for leakages. If there is a leakage, a distinct oil stain will be seen.
b) Check the suction and the exhaust pressure valves (high pressure and low
pressure) of compressor to see whether they are normal.
c) Pay attention to the rate at which the temperature decreases in both the
refrigerator and freezer compartments.
d) Check the environment to see whether it is suitable for the refrigerator.
e) Check refrigerator door seal, case, table surface, and heat insulation layer.
Listen
a) Listen to the noises made while the compressor is running. During the normal
operation of compressor, a slight and uniform humming sound due to
undulation of electric currents will be heard. The sounds listed below indicate
a malfunction.
i.
Humming sounds
from a fully enclosed aggregate unit indicate that the
motor was not started properly.
