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6-5 REFRIGERATING CYCLE
Troubleshooting Chart
STATE OF
CAUSE
THE SET
PARTIAL
Freezer
LEAKAGE
compartment and
Refrigerator don't
cool normally.
WHOLE
Freezer
LEAKAGE
compartment and
Refrigerator don't
cool normally.
PARTIAL
Freeze
CLOG
compartment and
Refrigerator don't
cool normally.
WHOLE
Freezer
CLOG
compartment and
Refrigerator don't cool. formed.
MOISTURE
Cooling operation
CLOG
stops periodically.
COMP-
Freezer and
RESSION
Refrigerator
don't cool.
NO COMP-
No compressing
RESSION
operation.
Leakage Detection
Observe discharging point of refrigerant which may be in the oil discharging part in the compressor and hole of evaporator.
Check if compressor
runs or not.
Frost formed normally
Moisture Clog
Check Compressor
STATE OF THE
EVAPORATOR
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 isn't
Flowing sound of refrigerant
is not heard and frost melts.
Low flowing sound of
refrigerant is heard and
frost forms in inlet only.
Flowing sound of refrigerant
is not heard and no frost.
Check if frost
YES
forms or not in
Evaporator.
Normal amount
Faulty
Compressor.
Clogged by dust.
TEMPERATURE
OF THE
COMPRESSOR
A little higher
than ambient
temperature.
Equal to ambient
temperature.
A little higher
than ambient
temperature.
Equal to ambient
temperature.
Lower than
ambient
temperature
A little higher
ambient
temperature.
Equal to ambient
temperature.
No frost
or forms
in inlet only
Observe the discharged
amount of Refrigerant.
Inject refrigerant to compressor
and check cooling operation.
Frost formed normally
- 14 -
REMARKS
• Refrigerant level is low due
•
to a leak.
• Normal cooling is possible
•
when injecting of Refrigerant
•
the regular amount.
• No discharging of Refrigerant.
• Normal cooling is possible
•
when injecting of Refrigerant
•
the regular amount.
• Normal discharging of
•
refrigerant.
• The capillary tube is faulty.
• Normal discharging of
•
Refrigerant.
• Cooling operation restarts
•
when heating the inlet of
•
capillary tube.
• Low pressure at high side
•
of compressor due to low
•
refrigerant level.
• No pressure of high pressure
•
part in the compressor.
Check if oil
leaks or not.
No or much amount
YES
Gas leakage.
(Check the leakage point)
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