Refrigeration Cycle - LG LFC23760ST/03 Service Manual

6-5 REFRIGERATION CYCLE

• Troubleshooting Chart
STATE OF
CAUSE
THE UNIT
Freezer
compartment and
PARTIAL
refrigerator don't
LEAKAGE
cool normally
Freezer
COMPLETE
compartment and
LEAKAGE
refrigerator don't
cool normally
Freezer
PARTIAL
compartment and
RESTRICTION
refrigerator don't
cool normally
Freezer
COMPLETE
compartment and
RESTRICTION
refrigerator don't
cool.
Cooling operation
MOISTURE
stops periodically.
RESTRICTION
Freezer and
COMPRE-
refrigerator don't
SSION
cool.
NO
No compressing
COMPRE-
operation.
SSION
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 there is no
frost.
- 24 -
TEMPERATURE
OF THE
COMPRESSOR
- Refrigerant level is low due to a
A little higher than
leak. ¥
ambient
- Normal cooling is possible by
temperature.
restoring the normal amount of
¥
refrigerant and repairing the leak.
¥
- No discharging of refrigerant.
Equal to ambient
- Normal cooling is possible by
temperature.
restoring the normal amount of
¥
refrigerant and repairing the leak.
¥
A little higher than
- Normal discharging of the
ambient
refrigerant.
¥
temperature.
- The capillary tube is faulty.
Equal to ambient
- Normal discharging of the
temperature.
refrigerant.
¥
- Cooling operation restarts when
Lower than ambient
heating the inlet of the capillary ¥
temperature.
tube. ¥
A little higher than
- Low pressure at high side of
ambient
compressor due to low
¥
temperature.
refrigerant level.
¥
- No pressure in the high
Equal to ambient
pressure part of the compressor.
temperature
¥
¥
REMARKS