LG GR-T622, Service Manual

Page: 14 / 18

6-5 REFRIGERATING CYCLE
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Troubleshooting Chart
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Leakage Detection
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Observe discharging point of refrigerant which may be in the oil discharging part in the compressor and hole of evaporator.
YES
YES
Whether Compressor
runs or not.
Whether frost
forms or not in
Evaporator.
Observe the discharged
amount of Refrigerant.
Inject Refrigerant to Compressor
and check cooling operation.
Clogged by dust. Gas leakage.
Faulty
Compressor.
Moisture Clog.
Whether oil
leaks or not.
Frost formed normally
Normal amount
No or much amount
(Check the leakage point)
Frost formed normally
No frost
or forms
in inlet only
Check Compressor
PARTIAL Freezer room and Low flowing sound of A little high • Refrigerant level is low due
LEAKAGE Refrigerator Refrigerant is heard and more than • to a leak.
don't cool frost forms in inlet only ambient • Normal cooling is possible
normally. temperature. • when injecting of Refrigerant
• the regular amount.
WHOLE Freezer room and Flowing sound of Refrigerant Equal to ambient • No discharging of Refrigerant.
LEAKAGE Refrigerator is not heard and frost isn't temperature. • Normal cooling is possible
don't cool formed. • when injecting of Refrigerant
normally. • the regular amount.
PARTIAL Freeze room and Flowing sound of Refrigerant A little high • Normal discharging of
CLOG Refrigerator is heard and frost forms more than • refrigerant.
don't cool in inlet only. ambient • The capillary tube is faulty.
normally. temperature.
WHOLE Freezer room and Flowing sound of Refrigerant Equal to ambient • Normal discharging of
CLOG Refrigerator is not heard and frost isn't temperature. • Refrigerant.
don't cool. formed.
MOISTURE Cooling operation Flowing sound of Refrigerant Low than • Cooling operation restarts
CLOG stops periodically. is not heard and frost melts. ambient • when heating the inlet of
temperature • capillary tube.
COMP- Freezer and Low flowing sound of A little high • Low pressure at high side
RESSION Refrigerator Refrigerant is heard and than 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 of high pressure
RESSION operation. is not heard and no frost. temperature. • part in the compressor.
CAUSE
TEMPERATURE
OF THE
COMPRESSOR
REMARKS
STATE OF
THE SET
STATE OF THE
EVAPORATOR
LEAKAGE
CLOGGED
BY
DUST
DEFECTIVE
COMPRESSION