Refrigerating Cycle; Troubleshooting - LG GR-559JPA Service Manual

6-5 REFRIGERATING CYCLE

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.
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
Faulty
Moisture Clog.
Compressor.
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
Inject Refrigerant to
Compressor and check
cooling operation.
Clogged by dust.
- 20 -
TEMPERATURE
OF THE
COMPRESSOR
A little high • A little Refrigerant
more than • discharges.
ambient • Normal cooling is possible
temperature. • when injecting Refrigerant
• of regular amount.
Equal to ambient • No discharging of Refrigerant.
temperature. • Normal cooling is possible
• when injecting Refrigerant
• of regular amount.
A little high • Normal discharging of
more than • refrigerant.
ambient • The capillary tube is faulty.
temperature.
Equal to ambient • Normal discharging of
temperature. • Refrigerant.
Low than • Cooling operation restarts
ambient • when heating the inlet of
temperature • capillary tube.
A little high • The pressure of high
than ambient • pressure part in
temperature. • compressor is low.
Equal to ambient • No pressure of high pressure
temperature. • part in compressor.
Whether oil leaks
or not.
No frost or forms
in inlet only
Observe the discharging
amount of Refrigerant.
No or much amount
Normal formed
frost in Evaporator
(Check the leakage point)
REMARKS
YES
Gas leakage.