Refrigerating Cycle - LG GR-M652Y*A Service Manual

6-5 REFRIGERATING CYCLE

Troubleshooting Chart
STATE OF THE
CAUSE
SET
PARTIAL Freezer and
LEAKAGE Refrigerator don't
get cold normally.
Freezer and
WHOLE
Refrigerator don't
LEAKAGE
get cold at all.
PARTIAL Freezer 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.
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 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
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
- 28 -
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