LG GR-B197GVQ Service Manual page 90

T R O U B L E D I A G N O S I S
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Problems Symptom Causes Checks Measures Remarks
Bad
cooling Wrong
Defective AC
Damper.
Check AC
damper
Check if AC
damper motor
and Reconnect lead
Refrigerator motor
and reed switch reed switch lead wire
are
wire.
temperature.
and lead wire
are
cut. cut
with
a
tester.
Check AC damper Refer to AC damper in
parts
Replace AC damper
part.
repair guide.
or
refrigerator control
box
assembly.
Check AC
damper
Refer
to
AC
damper
in
parts Replace relay
or
Refer
to single
Motor
driving relay
in
repair guide.
PCB.
motor damper
PCB. driving circuits
in circuit
explanation.
Foreign
materials in AC Check AC
damper
baffle Remove
foreign
damper
baffles
visually.
materials.
Ice formation
on
AC Check if AC damper Heater Replace AC damper
damper baffles wire is cut with
a
tester.
or
refrigerator control
Box assembly.
Defective refrigerator Defective refrigerator Check the resistance of Replace refrigerator Refer to
sensor
sensor sensor parts.
refrigerator
sensor
with
a
tester.
sensor.
resistance
characteristic
table in circuit
explanation.
Refrigerator
sensor
is Check the
sensor
color in the
Repair
main PCB
substituted for other circuit. (main PCB
sensor sensor
housing.
sensor.
housing.)
Defective
refrigerator
Check if
refrigerator
sensor
Fix
again
the
sensor
assembly
is
not
fixed
at
cover sensor
but
refrigerator
sensor.
condition. inner
case
visually.