LG GR-B197GVQ Service Manual page 89

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.
Freezer
Compressor
does
Compressor
Lead Wire Check compressor Lead Wire Reconnect Lead
temperature
is
not start.
is
cut.
with
a
tester.
Wire.
high.
Defective compressor Measure
voltage at
PCB CON5
Replace relay
RY1 Refer
to
load
driving relay. (3&9) after pressing main PCB and RY14
or
PCB. driving circuit in
test switch
once.
It is OK if circuit
voltage
is normal.
explanation.
Defective freezer Defective Freezer Check resistance of freezer Replace freezer Refer to
sensor. sensor parts. sensor
with
a
tester.
sensor.
resistance
characteristics
table of
sensor
in
circuit
Freezer
sensor
is Confirm the color of
sensor
in Repair main PCB explanation.
substituted for other circuits (main PCB
sensor sensor
housing
sensor.
housing).
Defective freezer fan Fan
motor
lead wire Check fan
motor
lead wire Reconnect lead
motor. is cut. with
a
tester. wire.
?
Defective door switch Measure the voltage between
?
Replace door Refer to load
(freezer, refrigerator,
PCB power blue line and fan switch
(freezer, driving
circuits in
home
bar). motor
after
pressing test
switch
refrigerator
and circuit
?
Defective fan
motor.
of Main PCB. If the
voltage
is home
bar). explanation.
?
Defective fan motor normal, it is OK.
?
Replace fan motor.
driving relay.
?
Replace relay RY5
& RY6
or
PCB.
Faulty defrost. Refer to faulty defrost items in trouble diagnosis Refer to trouble
functions. diagnosis
function.