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6-5 REFRIGERATING CYCLE
t Troubleshooting Chart
t Leakage Detection
Observe discharging point of refrigerant which may be in oil discharging part in compressor and hole of evaporator.
YES
YES
Whether Compressor
runs or not.
Whether frost
forms or not in
Evaporator.
Observe the discharging
amount of Refrigerant.
Inject Refrigerant to
Compressor and check
cooling operation.
Clogged by dust. Gas leakage.
Faulty
Compressor.
Moisture Clog.
Whether oil leaks
or not.
Normal formed frost
Normal amount
No or much amount
(Check the leakage point)
Normal formed
frost in Evaporator
No frost or forms
in inlet only
Check Comprossor
PARTIAL Freezer and Low flowing sound of A little higher ¥ A little Refrigerant
LEAKAGE Refrigerator Refrigerant is heard and than ¥ discharges.
don’t get cold frost forms in inlet only ambient ¥ Normal cooling is possible
normally. temperature. ¥ when injecting Refrigerant
¥ of regular amount.
WHOLE Freezer and Flowing sound of Refrigerant Equal to ambient ¥ No discharging of Refrigerant.
LEAKAGE Refrigerator is not heard and frost isn’t temperature. ¥ Normal cooling is possible
don’t get cold formed. ¥ when injecting Refrigerant
at all. ¥ of regular amount.
PARTIAL Freezer room and Flowing sound of Refrigerant A little higher ¥ Normal discharging of
CLOG Refrigerator is heard and frost forms than ¥ refrigerant.
don’t get cold in inlet only. ambient ¥ The capillary tube is faulty.
normally. temperature.
WHOLE Freezer and Flowing sound of Refrigerant Equal to ambient ¥ Normal discharging of
CLOG Refrigerator is not heard and frost isn’t temperature. ¥ Refrigerant.
don’t get cold. formed.
MOISTURE Cooling operation Flowing sound of Refrigerant Lower than ¥ Cooling operation restarts
CLOG stops periodically. is not heard and frost melts. ambient ¥ when heating the inlet of
temperature ¥ capillary tube.
COMP- Freezer and Low flowing sound of A little higher ¥ The pressure of high
RESSION Refrigerator Refrigerant is heard and than ambient ¥ pressure part in
don’t get cold. frost forms in inlet only. temperature. ¥ compressor is low.
NO COMP- No compressing Flowing sound of Refrigerant Equal to ambient ¥ No pressure of high pressure
RESSION operation. is not heard and no frost. temperature. ¥ part in compressor.
CAUSE
TEMPERATURE
OF THE
COMPRESSOR
REMARKS
STATE OF
THE SET
STATE OF THE
EVAPORATOR
LEAKAGE
CLOGGED BY DUST
DEFECTIVE
COMPRESSION
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