Refrigerating Cycle - LG GR-349SQF.CEWQEHU Service Manual

5 REFRIGERATING CYCLE

Troubleshooting Chart
STATE OF
CAUSE
THE SET
PARTIAL Freezer room and
LEAKAGE Refrigerator
don't cool
normally.
WHOLE Freezer room and
LEAKAGE Refrigerator
don't cool
normally.
PARTIAL Freeze room and
CLOG Refrigerator
don't cool
normally.
WHOLE Freezer room and
CLOG Refrigerator
don't cool.
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.
Whether Compressor
runs or not.
Frost formed normally
Moisture Clog.
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
YES
forms or not in
Evaporator.
Normal amount
Faulty
Compressor.
Clogged by dust.
Check Compressor
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 discharged
amount of Refrigerant.
Inject Refrigerant to Compressor
and check cooling operation.
Frost formed normally
- 15 -
REMARKS
¥ A little Refrigerant
¥ discharges.
¥ 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.
¥ The pressure of high
¥ pressure part in
¥ compressor is low.
¥ No pressure of high pressure
¥ part in the compressor.
Whether oil
leaks or not.
No or much amount
YES
Gas leakage.
(Check the leakage point)