6-5 REFRIGERATING CYCLE
- 21 -
• Troubleshooting Chart
Leakage Detection
PARTIAL
Freezer
Low flowing sound of
A little higher
• Refrigerant level is low due
LEAKAGE
compartment and
Refrigerant is heard and
than ambient
to a leak.
Refrigerator don't
frost forms in inlet only.
temperature.
• Normal cooling is possible by
cool normally.
restoring the normal amount of
• Refrigerant and repairing the leak.
COMPLETE
Freezer
Flowing sound of refrigerant
Equal to ambient
• No discharging of Refrigerant.
LEAKAGE
compartment and
is not heard and frost isn't
temperature.
• Normal cooling is possible by
Refrigerator don't
formed.
restoring the normal amount of
cool normally.
refrigerant and repairing the leak.
PARTIAL
Freezer
Flowing sound of refrigerant
A little higher
• Normal discharging of the
RESTRICTION
compartment and
is heard and frost forms
than ambient
refrigerant.
Refrigerator don't
in inlet only.
temperature.
• The capillary tube is faulty.
cool normally.
WHOLE
Freezer
Flowing sound of refrigerant
Equal to ambient
• Normal discharging of the
RESTRICTION
compartment and
is not heard and frost isn't
temperature.
refrigerant.
Refrigerator don't cool. formed.
MOISTURE
Cooling operation
Flowing sound of refrigerant
Lower than
• Cooling operation restarts
RESTRICTION
stops periodically.
is not heard and frost melts.
ambient
when heating the inlet of the
temperature.
capillary tube.
COMP-
Freezer and
Low flowing sound of
A little higher
• Low pressure at high side
RESSION
Refrigerator
refrigerant is heard and
ambient
of compressor due to low
don't cool.
frost forms in inlet only.
temperature.
refrigerant level.
NO COMP-
No compressing
Flowing sound of refrigerant
Equal to ambient
• No pressure in the high
RESSION
operation.
is not heard and there is
temperature.
pressure part of the
no frost.
compressor.
CAUSE
TEMPERATURE
OF THE
COMPRESSOR
REMARKS
STATE OF
THE UNIT
STATE OF THE
EVAPORATOR
LEAKAGE
RESTRICTION
DEFECTIVE
COMPRESSION
Check sealed system for leak.
Check if compressor runs.
(If don’t , wait a while until it start to work)
YES
Check frost pattern on Evaporator.
(Eva In, Eva Out)
If frost is formed normally
Only check that there is not any
hole or bad welding in Eva in-Eva
out.
No frost or frost forms
in inlet only
Check for oil leak on high
side (Machinery Room)
Gas leakage
Repair it.
YES
Confirm refrigerant
amount
None or too much.
Recharge refrigerant
(check correct quantity)
Finished OK
Frost formed
normally
Moisture restriction.
intermittent problem.
Replace
Compressor
Faulty
Compressor
Normal Amount
Restriction
No frost
normally
Frost formed
normally
