Troubleshooting Chart
- 16 -
6-5. REFRIGERATION CYCLE
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CAUSE
TEMPERATURE
OF THE
COMPRESSOR
REMARKS
STATE OF
THE UNIT
STATE OF THE
EVAPORATOR
LEAKAGE
CLOGGED BY
DUST
DEFECTIVE
COMPRESSION
PARTIAL
LEAKAGE
Freezer
compartment and
refrigerator don’t
cool normally
COMPLETE
LEAKAGE
PARTIAL
CLOG
WHOLE
CLOG
MOISTURE
CLOG
COMPRE-
SSION
NO
COMPRE-
SSION
Freezer
compartment and
refrigerator don’t
cool normally
Freezer
compartment and
refrigerator don’t
cool normally
Freezer
compartment and
refrigerator don’t
cool.
Cooling operation
stops periodically.
Freezer and
refrigerator don’t
cool.
No compressing
operation.
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.
A little higher than
ambient
temperature.
- Refrigerant level is low due to a
leak.
- Normal cooling is possible by
restoring the normal amount of
refrigerant and repairing the leak.
Equal to ambient
temperature.
- No discharging of refrigerant.
- Normal cooling is possible by
restoring the normal amount of
refrigerant and repairing the leak.
A little higher than
ambient
temperature.
- Normal discharging of the
refrigerant.
- The capillary tube is faulty.
Equal to ambient
temperature.
- Normal discharging of the
refrigerant.
Lower than ambient
temperature.
- Cooling operation restarts when
heating the inlet of the capillary
tube.
A little higher than
ambient
temperature.
- Low pressure at high side of
compressor due to low
refrigerant level.
Equal to ambient
temperature
- No pressure in the high
pressure part of the compressor.
Leakage Detection
YES
YES
Check if compressor
runs.
Check if frost
forms in
Evaporator.
Observe the discharged
amount of Refrigerant.
Inject refrigerant in compressor
and check cooling operation.
Clogged by dust.
Gas leakage.
Faulty
Compressor.
Moisture Clog
Check if oil
leaks.
Frost formed normally
Normal amount
None or too much
(Find the leak and repair it)
Frost formed normally
No frost
or frost forms
in inlet only
Check Compressor
Observe the discharging point of the refrigerant, which may be in the oil discharging part of the compressor and in a hole
in the evaporator.
Summary of Contents for LTN16385PL
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