LG LRFC25750ST, Service Manual

Page: 32 / 44

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8-4 TROUBLESHOOTING
PROBLEM
INDICA
TED BY
CHECK
CHECKING METHOD
CAUSE
SOLUTION
POWER SOURCE
1.
The whole DISPLA
Y
1. FREEZER/
Check if FREEZER/
POWER SOURCE is poor
.
Check outlet V
oltage.
is poor
.
LED/SEVEN SEGMENT
REFRIGERA
T
OR.
REFRIGERA
T
OR DOOR IS
DISPLA
Y
is of
f.
OPEN and check display
.
2.
DISPLA
Y LED/
2. If LAMP is dim.
Check visually
.
Applied voltage error
.
Use boosting TRANS.
SEVEN SEGMENT
3. The connection of
Check connection of
CONNECT
OR connection
Reconnect CONNECT
OR.
DISPLA
Y operates
the MAIN PWB
CONNECT
OR.
is poor
.
abnormally
CONNECT
OR.
TRANS FUSE is open.
Replace TRANS.
COOLING is poor
.
NO COOLING.
1. If the COMPRESSOR
USE TEST MODE1
COMPRESSOR locked or
Replace COMPRESSOR.
operate.
(forced COOLING).
blocked.
If less than 7 minutes pass
OLP
, PTC is poor
.
Replace OLP
, PTC.
after compressor shuts of
f,
COMPRESSOR RELA
Y is
Replace MAIN PWB.
don
’t press the KEY and
poor
.
wait.
THE CONNECTING WIRE
Check the connection of the
is poor
.
black wire of the MAIN PWB CONNECT
OR (CON1).
2. If refrigerant is leaking.
Measure the amount of frost
Refrigerant leakage.
Replace the leaking part and
.
sticking on EV
APORA
T
OR
replace any lost refrigerant.
and the surface temperature of the condenser pipe.
FREEZER
1. If F
A
N
MOT
OR
USE TEST MODE1
F
AN MOT
OR is poor
.
Replace the F
AN MOT
OR.
TEMPERA
TURE is
operates.
(forced COOLING).
incorrect
CONNECTING WIRE is poor
.
Refer to 8-2-4. 2 and check
2. If DEFROSTING
Check the amount of frost
DEFROSTING is poor
.
See
DEFROSTING
is normal.
sticking on the EV
APORA
T
OR .
is poor
.
3. If SENSOR
Check the resistance
SENSOR RESIST
ANCE is
Replace SENSOR.
is normal.
of the Refrigerator
poor
.
SENSOR.
4. Door Line contact.
Check the seal when
Door liner damaged.
Replace door liner
.
the door is closed.