LG LRBN2051 Series, Service Manual

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7-4 TROUBLESHOOTING
PROBLEM
INDICATED BY
CHECK
CHECKING METHOD
CAUSE
SOLUTION
POWER SOURCE
1.
The whole DISPLAY
1. FREEZER/
Check if FREEZER/
POWER SOURCE is poor.
Check outlet Voltage.
is poor.
LED/SEVEN SEGMENT
REFRIGERATOR.
REFRIGERATOR DOOR IS
DISPLAY
is off.
OPEN and check display.
2.
DISPLAY LED/
2. If LAMP is dim.
Check visually.
Applied voltage error.
Use boosting TRANS.
SEVEN SEGMENT
3. The connection of
Check connection of
CONNECTOR connection
Reconnect CONNECTOR.
DISPLAY operates
the MAIN PWB
CONNECTOR.
is poor.
abnormally
CONNECTOR.
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 off,
COMPRESSOR RELAY 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 CONNECTOR (CON2).
2. If refrigerant is leaking.
Measure the amount of frost
Refrigerant leakage.
Replace the leaking part and
.
sticking on EVAPORATOR
replace any lost refrigerant.
and the surface temperature of the condenser pipe.
FREEZER
1. If FAN
MOTOR
USE TEST MODE1
FAN MOTOR is poor.
Replace the FAN MOTOR.
TEMPERATURE is
operates.
(forced COOLING).
incorrect
CONNECTING WIRE is poor.
Certify the MOTOR and the connection of the black wire of the MAIN PWB CONNECTOR (CON2).
2. If DEFROSTING
Check the amount of frost
DEFROSTING is poor.
See
DEFROSTING
is
normal.
stic
kin
g o
n t
he
EVAPORATOR .
is poor
.
3. If SENSOR
Check the resistance
SENSOR RESISTANCE 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.