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Remedy
Turn the refrigerator off and prepare for defrosting. Open the refrigerator's door to let air inside
or use a fan to speed up air moving into the refrigerator to quicken the defrosting process. Never
strike the frost layer with any iron tools or wooden stick in order not to damage the evaporator
tubing.
6) Refrigerating oil in evaporator tubing
Analysis of Trouble
During the refrigerating cycles, small amounts of refrigerating oil may remain in the evaporator
tubing. However, if there is considerable refrigerating oil left in the evaporator after an extended
period of operation, the heat conduction effect will be severely affected. The result is poor
refrigerating effect.
Remedy
If there is no frost on the evaporator, then there is a high probability that the deterioration of
refrigerating effect is due to the accumulation of refrigerating oil in the evaporator tubing.
Remove accumulated refrigerating oil, dismantle the evaporator, purge it thoroughly, and then
dry it. If it is difficult to dismantle, fill the evaporator tubing with refrigerant from the evaporator
inlet several times to remove the refrigerating oil. Then, purge and dry it with nitrogen.
7) Flow obstructed in refrigerating system
Analysis of Trouble
If the refrigerating system was not purged thoroughly, the filter screen meshes become clogged
by dirt. This results in a decrease in flow rate and a poor refrigerating effect. The effects of
clogged filters included: decrease of gas discharge pressure, the drop in the temperature of
discharged gas, and, for severe cases, condensation and frosting may appear.
Remedy
Purge the tubing. After replacing, the dry filter or cleaning it thoroughly, refill the system with
refrigerant and seal the charging port.
• No Refrigerating
"No refrigerating" refers to a situation where the compressor runs normally, but the refrigerator's
temperature does not decrease. While servicing, careful attention will be required to find correct
the cause. The most common causes for this malfunction are analyzed below.
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