LG LRSC21934SW, Service Manual

Page: 77 / 129

TROUBLE DIAGNOSIS
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CLAIMS. CAUSES AND CHECK POINTS. HOW TO CHECK
3. Refrigeration
is weak.
Heater
Sheath
1) Refrigerant Partly leaked.
2) Poor defrosting capacity.
Drain path (pipe) clogged.
Defrost heater does not
generate heat.
Weld joint leak.
Parts leak.
Inject P/U into drain hose.
Foreign materials
penetration.
Cap drain is not disconnected.
Inject through the
hole.
Seal with drain.
P/U lump input.
Screw input.
Other foreign materials
input.
Parts
disconnected. Wire is cut.
- Lead wire.
- Heating wire.
- Contact point
between heating and
electric wire.
Dent by fin evaporator.
Heating wire is corroded
- Water penetration.
Bad terminal connection.
■
Check visually.
■
Check terminal
Conduction: OK.
No conduction: NG.
If wire is not cut, refer to
resistance.
P=Power
V=Voltage
R=Resistance
V 2
P= —
R
V 2
R= —
P