6-6. REFRIGERATING CYCLE
M Troubleshooting Chart
STATE OF
CAUSE
THE SET
PARTIAL
Freezer and
LEAKAGE
Refrigerator
don't get cold
normally.
WHOLE
Freezer and
LEAKAGE
Refrigerator
don't get cold
at all.
PARTIAL
Freeze room and
CLOG
Refrigerator
don't get cold
normally.
WHOLE
Freezer and
CLOG
Refrigerator
don't get cold.
MOISTURE
Cooling operation
CLOG
stops periodically.
COMP-
Freezer and
RESSION
Refrigerator
don't get cold.
NO COMP-
No compressing
RESSION
operation.
M Leakage Detection
Observe discharging point of refrigerant which may be in oil discharging part in compressor and hole of evaporator.
Whether Compressor
runs or not.
Normal formed frost
Moisture Clog.
Check Comprossor
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
formed.
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.
Whether frost
forms or not in
YES
Evaporator.
Normal amount
Faulty
Compressor.
Clogged by dust.
TEMPERATURE
OF THE
COMPRESSOR
A little high
more than
ambient
temperature.
Equal to ambient
temperature.
A little high
more than
ambient
temperature.
Equal to ambient
temperature.
Low than
ambient
temperature
A little high
than ambient
temperature.
Equal to ambient
temperature.
No frost or forms
in inlet only
Observe the discharging
amount of Refrigerant.
Inject Refrigerant to
Compressor and check
cooling operation.
Normal formed
frost in Evaporator
- 14 -
REMARKS
• 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.
• Normal discharging of
•
Refrigerant.
• Cooling operation restarts
•
when heating the inlet of
•
capillary tube.
• The pressure of high
•
pressure part in
•
compressor is low.
• No pressure of high pressure
•
part in compressor.
Whether oil leaks
or not.
No or much amount
Gas leakage.
(Check the leakage point)
YES