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