LG GR-612DVQF Service Manual ▷ View online
C
N
N
L
3
4
6
5
2
S
BK
PK
RD
BL
BL
BL
CAPACITOR
PART
COMPRESSOR
EARTH PART
P.T.C
STARTER
BL
BK
RD
BL
BK
GY
BL
BL
BL
RD
PR
GN/YL
POWER
SUPPLY
CORD
SUPPLY
CORD
RD
YL
R0-SENSOR
DOOR OPEN
PERCEPTION
R2-SENSOR
R1-SENSOR
DEF-SENSOR
F-SENSOR
RT-SENSOR
PUMP
MOTOR
MOTOR
PUMP
S/W
S/W
DISPENSER
PART
PART
TWIN MOTOR
DAMPER
REED S/W
GY
GY
YL
BL
BL
BL
BO
BO
BN
BN
PR
PR
SB
BK
RD
GY
BO
BN
BN
PR
PR
SB
BK
RD
GY
WH
WH
WH
WH WH BK BN RD BO YL GN BL PR GY
SB PK
RD BK BL BL
WH/BK
WH
BK BN RD BO YL GN BL PR GY
SB PK WH/BKGN/YL
WH
BL
PK
BO
BN
BK
2400
2800
PK
BO
BN
BK
YL
YL
GY
BK
OVERLOAD
PROTECTOR
STARTING
RUNNING
TE-PLATE
L-CORD
TWIN MOTOR
DAMPER
COOLING
FAN MOTOR
FUSE-M(77
˚C)
DOOR SW-F,R
R-LAMP
FUSE-PART
FAN MOTOR
F-LAMP
M
C
a
b
M
M
PWB ASSY, MAIN
DISPLAY CONTROL PWB
a
b
b
M
WH
BN
CIRCUIT DIAGRAM
FUNCTION TEST METHOD
NOTICE BEFORE TESTING.
1) If there is any ERROR during power on state, ERROR CODE is displayed with
FREEZER TEMPERATURE LEDs on freezer door, the other LEDs are all off and
DISPLAY SWITCH don't work.
DISPLAY SWITCH don't work.
2) Be sure to RESET power after ERROR CHECK and TEST MODE.
BK
YL
SB
BLACK
YELLOW
SKY BLUE
:
:
:
BN
GN
PK
BROWN
GREEN
PINK
:
:
:
GY
WH/BK
GRAY
WHITE/BLACK
:
:
BO
PR
BRIGHT ORANGE
PURPLE
:
:
WH WHITE
:
RD
BL
GN/YL
RED
BLUE
GREEN/YELLOW
:
:
:
• DISPENSER PART,
CAPACITOR PART,
THE PLUG TYPE,
COMPRESSOR EARTH PART
ON CIRCUIT DIAGRAM ARE
SUBJECT TO CHANGE IN
DIFFERENT LOCALITIES AND
ACCORDANCE WITH MODEL
TYPE.
THE PLUG TYPE,
COMPRESSOR EARTH PART
ON CIRCUIT DIAGRAM ARE
SUBJECT TO CHANGE IN
DIFFERENT LOCALITIES AND
ACCORDANCE WITH MODEL
TYPE.
There is TEST SWITCH on the MAIN PCB
(1) SELF TEST
ON :
NO
1
2
3
4
5
6
7
8
MODE
TEST1
<COOLING MODE>
TEST2
<DEFROSTING
MODE>
RESET
MANIPULATION
SHORT TEST PIN
1 TIMES
1 TIMES
SHORT 1 TIMES
IN TEST 1
IN TEST 1
SHORT 1 TIMES
IN TEST 2
IN TEST 2
ON
OFF
DEFROST-HEATER
OFF
TWIN MOTOR
DAMPER
BOTH BAFFLE
OPEN
BOTH BAFFLE
CLOSE
DISPLAY LED
ERROR STATE
F-SENSOR ERROR
R1-SENSOR ERROR
R2-SENSOR ERROR
DEFROST-SENSOR
ERROR
F-SENSOR LEAD WIRE OPEN OR SHORT
R-MIDDLE-SENSOR LEAD WIRE OPEN OR SHORT
R-BOTTOM-SENSOR LEAD WIRE OPEN OR SHORT
DEF-SENSOR LEAD WIRE OPEN OR SHORT
DAMPER MOTOR OR REED SWITCH LEAD WIRE
OPEN OR SHORT, OPERATING PHOTO-TRIAC ERROR
DEFROST-HEATER, OR TEMPERATURE FUSE OPEN,
DRAIN GET BLOCKED, OPERATING RELAY ERROR
OPEN OR SHORT, OPERATING PHOTO-TRIAC ERROR
DEFROST-HEATER, OR TEMPERATURE FUSE OPEN,
DRAIN GET BLOCKED, OPERATING RELAY ERROR
ERROR CODE LEDS
(2) FUNCTION TEST
OFF :
F1
F3
F2
F1
AFTER 1 SECOND FROM PUSHING FRZ. TEMP BUTTON AND SUPER FRZ
BUTTON CONCURRENTLY.
BUTTON CONCURRENTLY.
IF NORMAL, LEDS ARE ALL ON
IF ERROR, ONLY SUPER FRZ GRAPHIC PART( ) LED IS OFF
IF ERROR, ONLY SUPER FRZ GRAPHIC PART( ) LED IS OFF
AFTER 1 SECOND FROM PUSHING FRZ.TEMP BUTTON AND SUPER FRZ
BUTTON CONCURRENTLY.
BUTTON CONCURRENTLY.
IF NORMAL, LEDs ARE ALL ON
IF ERROR, ONLY SUPER FRZ GRAPHIC PART( ) LED IS OFF
IF ERROR, ONLY SUPER FRZ GRAPHIC PART( ) LED IS OFF
ON IF DEF-SENSOR
IS BELOW 13˚C
IS BELOW 13˚C
SUPER FREEZE,
SUPER COOL
GRAPHIC
PART LED IS ON.
SUPER COOL
GRAPHIC
PART LED IS ON.
• IF DEF-SENSOR TEMPERATURE IS OVER 13˚C IN TEST 2 , IT GOES TO
INITIAL RESET.
• WHEN IT RETURNS TO INITIAL RESET, COMPRESSOR OPERATES
AFTER 7 MINUTES.
ALL ON
3854JD1021A
• FUSE PART APPLICATION
FUSE
NO
FUSE 110V~127V
250V 15A
200V~240V
250V 9A
COMPRESSOR,
FAN
F1
ERROR DISPLAY PART
SUPER FRZ
FOCUSED
COOLING
F2 F3 F4
FRZ. TEMP
Min
Max
Min
Max
A
SUPER COOL
REF. TEMP
A
B
B
METHOD OF ERROR DETECT
TWIN MOTOR
DAMPER ERROR
DAMPER ERROR
DEFROST ERROR
RT-SENSOR
ERROR(INNER
HINGE-U)
ERROR(INNER
HINGE-U)
RO-SENSOR
ERROR
(R-UPPER)
ERROR
(R-UPPER)
- 33
-
7-4. TRUBLE SHOOTING
• Replace PCB when no trouble after checking the contents of trouble.
CLASSIFICATION
STATE OF TROUBLE
POINT BE CHECKED
CHECKING METHOD
CONTENT
REMEDY
POWER SOURCE
1. All the DISPLAY
1. FREEZER/
FREEZER/REFRIGERATOR
POWER SOURCE is poor
Certify Fuse.
is poor
LED OFF
REFRIGERATOR
DOOR OPEN
Certify outlet Voltage.
2. DISPLAY LED
2. LAMP is dim.
CHECK with the naked.
Applied voltage mistake
Use boosting TRANS.
represents abnormal
3. The connection of
Certify connection of
CONNECTOR connection
Reconnect CONNECTOR.
operation.
CONNECTOR of MAIN PWB. CONNECTOR.
connection is poor.
TRANS FUSE open.
TRANS FUSE open.
Replace TRANS.
4. The conncetion of
Certify connection of
CONNECTOR
Reconnect CONNECTOR.
CONNECTOR of UPPER
of CONNECTOR
connection is poor.
UPPER HINGE PART
Certify connection of
is poor.
of DISPLAY PCB
COOLING is poor
NO COOLING
1. COMPRESSOR operates?
PRESS TEST KEY on MAIN
COMPRESSOR lock or
Replace COMPRESSOR.
PWB once. (forced COOLING)
blocked.
•If pass less than 7 minutes
OLP, PTC is poor.
Replace OLP, PTC.
after stop of COMP, don't
COMPRESSOR RELAY IS
Replace MAIN PWB RY1
press it and stand-by.
poor
THE CONNECTING WIRE
THE CONNECTING WIRE
Certify the black wire of MAIN
is poor.
PWB CONNECTOR (CON2)
2. Whether refrigerant leaks or
Measure the amount of frost
Refrigerant leakage.
Remedy the leaking part
leaks or not.
sticking on EVA and the
and reaching Refrigerant.
surface temperature of
condenser pipe.
condenser pipe.
FREEZER
1. Whether FAN MOTOR
PRESS TEST KEY on
DOOR S/W is poor.
Replace DOOR S/W.
TEMPERATURE is poor
operates or not.
MAIN PWB once.
FAN MOTOR is poor
Replace FAN MOTOR.
(force COOLING)
DOOR LINE contact.
Replace DOOR LINER.
CONETTING WIRE is poor.
Certify MOTOR and the
connection of the white wire
of MAIN PWB CONNECTOR.
(CON2)
connection of the white wire
of MAIN PWB CONNECTOR.
(CON2)
2. DEFROSTING normal?
Certify the amount of frost
DEFROSTING is poor.
See the DEFROSTING
sticking on EVA.
trouble.
3. SENSOR normal?
Check resistance the
SENSOR REGISTANCE is
Recplace SENSOR
SENSOR in the FREEZER
poor.
CONTROL BOX-F
- 34
-
CLASSIFICATION
STATE OF TROUBLE
POINT BE CHECKED
CHECKING METHOD
CONTENT
REMEDY
COOLING is poor.
REFRIGERATOR
1. FREEZER TEMPERATURE
See "FREEZER
Certify the attaching state
TEMPERATURE is
is normal?
TEMPERATURE is poor".
of DOOR.
poor.
2. DAMPER normal?
Check DAMPER.
DAMPER is poor.
Replace DAMPER.
3. DAMPER normal?
Damper is opened and
DAMPER FREEZING.
Replace the DAMPER and
closed once and opened
and seal the leaking part of
again when pressing the
part of cold air.
TEST KEY once on the
DAMPER is poor.
Replace the DAMPER.
MAIN PWB.
(resistance)
Connection is poor.
Certify the connection of
connector of DAMPER ASM
and MAIN PWB.
REED S/W is poor.
Certify the connection and
remedy.
Replace the DAMPER.
4. Cool air of FAN MOTOR is
Certify the amount of cool air
FAN MOTOR is poor.
Replace FAN MOTOR.
is sufficient?
and its speed touching check
Passage of cool air blocking.
Remove impurities.
supplied into
(DUCT part)
REFRIGERATOR while
EVA frozen.
See "DEFROSTING is poor".
DAMPER opens.
5. Damper assembling is
Certify the leakage of cool
Cool air leakage.
Leaking part SEALING.
normal?
air from DAMPER.
REFRIGERATOR
1. DAMPER assembling is
Certify the leakage of cool
Cool air leakage.
Leaking part SEALING.
freezes.
poor?
air from DAMPER.
2. DAMPER normal?
See "Damper normal?" in
"REFRIGERATOR
temperature is poor".
- 35
-
CLASSIFICATION
STATE OF TROUBLE
POINT BE CHECKED
CHECKING METHOD
CONTENT
REMEDY
DEFROSTING is
NO DEFROSTING.
1. HEATER emit heat?
PRESS TEST KEY on MAIN
HEATER disconnection.
Replace HEATER.
poor.
on MAIN PWB twice.
(forced DEFROSTING)
TEMPERATURE FUSE
Replace TEMPERATURE
disconnection.
FUSE.
Connection is poor.
Certify EVA connection and
wire of MAIN PWB
CONNECTOR
DEF-SENSOR is poor.
Replace DEF-SENSOR.
HEATER RELAY is poor.
Replace RY4 of MAIN PWB.
2. DRAIN PIPE blocking?
Ceritify DRAIN PIPE.
DRAIN PIPE bloking.
Remove ice and impurities.
Certify HEATER PLATE
resistance.
3. Remain ice at
Certify the attaching
Attraching is poor.
Reassemble DEF-SENSOR.
DEFROSTING?
of DEF-SENSOR.
Certify the attaching
DOOR sticking is poor.
Reassemble DOOR.
state(gap) of FREEZER/
Replace GASKET.
REFRIGERATOR DOOR.
DISPENSER is
NO PUMPING
1. PUMP MOTOR doesn't
Certify that the Voltage of
PUMP MOTOR is poor
Check the PUMP MOTOR
poor.
operate?
the PUMP MOTOR when
and the connection of it.
PUMP SWITH is pushed
is 12V
2. The connection of PUMP
Check the connection.
Connection is poor
Check the connection.
SWITCH is poor?
The connection of
Replace PUMP SWITCH.
PUMP SWITCH is poor.
3. MAIN PWB is poor?
After pushing the PUMP
MAIN PWB is poor.
Replace MAIN PWB.
SWITCH, check the PWB.
PUMP MOTOR don't
1. The conncetion of PUMP
Check the connection of
PUMP SWITCH is short.
Reassemble the connnection
stop.
SWITCH is poor?
PUMP SWITCH.
of PUMP SWITCH.
2. MAIN PWB is poor?
Check the voltage of CON6
MAIN PWB is poor.
Replace MAIN PWB.
on MAIN PWB.