LG GR-L207WVS User manual

CAUTION
PLEASE READ CAREFULLY THE SAFETY PRECAUTIONS OF THIS BOOK
BEFORE CHECKING OR OPERATING THE REFRIGERATOR.
REFRIGERATOR
SERVICE MANUAL
MODEL: GR-L207WVS COLOR: SUPER WHITE
http://biz.lgservice.com
Ref. No.
GR-L207GVUA
GR-L207NIS
TITANIUM
GR-L207GTUA

WARNINGS AND PRECAUTIONS FOR SAFETY ................................................................................................................ 3
SPECIFICATIONS................................................................................................................................................................... 4
PARTS IDENTIFICATION ..................................................................................................................................................... 12
HOW TO INSTALL THE REFRIGERATOR .......................................................................................................................... 18
HOW TO ADJUST DOOR HEIGHT OF THE REFRIGERATOR ........................................................................................ 18
HOW TO INSTALL WATER PIPE........................................................................................................................................19
HOW TO CONTROL THE AMOUNT OF WATER SUPPLIED TO THE ICEMAKER ......................................................... 23
MICOM FUNCTION .............................................................................................................................................................. 25
EXPLATION FOR MICOM CIRCUIT..................................................................................................................................... 33
EXPLANATION FOR PWB CIRCUIT ..................................................................................................................................33
COMPENSATION CIRCUIT FOR WEAK-COLD, OVER-COLD AT FREEZING ROOM.....................................................48
PWB PARTS DRAWING AND LIST ....................................................................................................................................51
PWB CIRCUIT DIAGRAM ...................................................................................................................................................61
ICE MAKER AND DISPENSER OPERATION PRINCIPLE AND REPAIR METHOD.......................................................... 65
WORKING PRINCIPLES.....................................................................................................................................................65
FUNCTION OF ICE MAKER ...............................................................................................................................................66
ICE MAKER TROUBLESHOOTING....................................................................................................................................69
ICE MAKER CIRCUIT PART ...............................................................................................................................................70
CIRCUIT................................................................................................................................................................................ 71
TROUBLE DIAGNOSIS........................................................................................................................................................ 73
TROUBLE SHOOTING ...................................................................................................................................................... 73
FAULTS .............................................................................................................................................................................. 83
COOLING CYCLE HEAVY REPAIR ................................................................................................................................. 100
HOW TO DEAL WITH CLAIMS........................................................................................................................................ 107
HOW TO DISASSEMBLE AND ASSEMBLE ..................................................................................................................... 112
DOOR ............................................................................................................................................................................... 112
HANDLE ........................................................................................................................................................................... 113
SHROUD, GRILLE FAN ................................................................................................................................................... 113
ICEMAKER ....................................................................................................................................................................... 113
DISPENSER ..................................................................................................................................................................... 114
WATER TANK AND WATER LINE.................................................................................................................................... 116
HOME BAR....................................................................................................................................................................... 116
EXPLODED VIEW............................................................................................................................................................... 117
REPLACEMENT PARTS LIST ........................................................................................................................................... 126
CONTENTS
- 2 -

Please observe the following safety precautions in order to
use safely and correctly the refrigerator and to prevent
accident and danger during repair.
1. Be care of an electric shock. Disconnect power cord
from wall outlet and wait for more than three minutes
before replacing PWB parts. Shut off the power
whenever replacing and repairing electric components.
2. When connecting power cord, please wait for more than
five minutes after power cord was disconnected from the
wall outlet.
3. Please check if the power plug is pressed down by the
refrigerator against the wall. If the power plug was
damaged, it may cause fire or electric shock.
4. If the wall outlet is over loaded, it may cause fire. Please
use its own individual electrical outlet for the refrigerator.
5. Please make sure the outlet is properly earthed,
particularly in wet or damp area.
6. Use standard electrical components when replacing
them.
7. Make sure the hook is correctly engaged.
Remove dust and foreign materials from the housing
and connecting parts.
8. Do not fray, damage, machine, heavily bend, pull out,
or twist the power cord.
9. Please check the evidence of moisture intrusion in the
electrical components. Replace the parts or mask it
with insulation tapes if moisture intrusion was
confirmed.
10. Do not touch the icemaker with hands or tools to
confirm the operation of geared motor.
11. Do not let the customers repair, disassemble, and
reconstruct the refrigerator for themselves. It may
cause accident, electric shock, or fire.
12. Do not store flammable materials such as ether,
benzene, alcohol, chemicals, gas, or medicine in the
refrigerator.
13. Do not put flower vase, cup, cosmetics, chemicals,
etc., or container with full of water on the top of the
refrigerator.
14. Do not put glass bottles with full of water into the
freezer. The contents shall freeze and break the glass
bottles.
15. When you scrap the refrigerator, please disconnect the
door gasket first and scrap it where children are not
accessible.
WARNINGS AND PRECAUTIONS FOR SAFETY
- 3 -

SPECIFICATIONS
- 4 -
ITEMS SPECIFICATIONS
DIMENSIONS (mm) 890(W) X 840(D) X 1750(H)
NET WEIGHT (kg) 128
COOLING SYSTEM Fan Cooling
TEMPERATURE CONTROL Micom Control
DEFROSTING SYSTEM Full Automatic
Heater Defrost
INSULATION Cyclo-Pentane
COMPRESSOR P.T.C. Starting Type
EVAPORATOR Fin Tube Type
CONDENSER Wire Condenser
REFRIGERANT R134a (180g)
LUBRICATING OIL FREOL @10G (310 cc)
CAPILLARY TUBE ID 0.83
DRIER MOLECULAR SIEVE XH-7
ITEMS SPECIFICATIONS
FIRST DEFROST 4 - 5 Hours
DEFROST CYCLE 13 - 15 Hours
DEFROSTING DEVICE Heater, Sheath
ANTI SWEAT HEATER Dispenser Duct Door Heater
Dispenser Heater
Home Bar Heater
ANTI-FREEZING HEATER Water Injection Heater
Damper Heater
FREEZER LAMP 40W (1 EA)
REFRIGERATOR LAMP 40W (1 EA)
DISPENSER LAMP 15W (1 EA)
1750 1720 1750
685
948
890
745
796
840
1218.5
<Front View> <Plane View>
1. Ref No. : GR-P247

SPECIFICATIONS
- 5 -
ITEMS SPECIFICATIONS
DIMENSIONS (mm) 890(W) X 755(D) X 1750(H)
NET WEIGHT (kg) 123
COOLING SYSTEM Fan Cooling
TEMPERATURE CONTROL Micom Control
DEFROSTING SYSTEM Full Automatic
Heater Defrost
INSULATION Cyclo-Pentane
COMPRESSOR P.T.C. Starting Type
EVAPORATOR Fin Tube Type
CONDENSER Wire Condenser
REFRIGERANT R134a (180g)
LUBRICATING OIL FREOL @10G (310 cc)
CAPILLARY TUBE ID 0.83
DRIER MOLECULAR SIEVE XH-7
1750 1720 1750
600
948
890
660
711
755
1133.5
<Front View> <Plane View>
2. Ref No. : GR-P207
ITEMS SPECIFICATIONS
FIRST DEFROST 4 - 5 Hours
DEFROST CYCLE 13 - 15 Hours
DEFROSTING DEVICE Heater, Sheath
ANTI SWEAT HEATER Dispenser Duct Door Heater
Dispenser Heater
Home Bar Heater
ANTI-FREEZING HEATER Water Injection Heater
Damper Heater
FREEZER LAMP 40W (1 EA)
REFRIGERATOR LAMP 40W (1 EA)
DISPENSER LAMP 15W (1 EA)

SPECIFICATIONS
- 6 -
ITEMS SPECIFICATIONS
DIMENSIONS (mm) 890(W) X 840(D) X 1750(H)
NET WEIGHT (kg) 125
COOLING SYSTEM Fan Cooling
TEMPERATURE CONTROL Micom Control
DEFROSTING SYSTEM Full Automatic
Heater Defrost
INSULATION Cyclo-Pentane
COMPRESSOR P.T.C. Starting Type
EVAPORATOR Fin Tube Type
CONDENSER Wire Condenser
REFRIGERANT R134a (180g)
LUBRICATING OIL FREOL @10G (310 cc)
CAPILLARY TUBE ID 0.83
ITEMS SPECIFICATIONS
DRIER MOLECULAR SIEVE XH-7
FIRST DEFROST 4 - 5 Hours
DEFROST CYCLE 13 - 15 Hours
DEFROSTING DEVICE Heater, Sheath
ANTI SWEAT HEATER Dispenser Duct Door Heater
Dispenser Heater
ANTI-FREEZING HEATER Water Injection Heater
Damper Heater
FREEZER LAMP 40W (1 EA)
REFRIGERATOR LAMP 40W (1 EA)
DISPENSER LAMP 15W (1 EA)
1750 1720 1750
685
948
890
745
796
840
1218.5
<Front View> <Plane View>
3. Ref No. : GR-L247

SPECIFICATIONS
- 7 -
ITEMS SPECIFICATIONS
DIMENSIONS (mm) 890(W) X 755(D) X 1750(H)
NET WEIGHT (kg) 120
COOLING SYSTEM Fan Cooling
TEMPERATURE CONTROL Micom Control
DEFROSTING SYSTEM Full Automatic
Heater Defrost
INSULATION Cyclo-Pentane
COMPRESSOR P.T.C. Starting Type
EVAPORATOR Fin Tube Type
CONDENSER Wire Condenser
REFRIGERANT R134a (180g)
LUBRICATING OIL FREOL @10G (310 cc)
CAPILLARY TUBE ID 0.83
ITEMS SPECIFICATIONS
DRIER MOLECULAR SIEVE XH-7
FIRST DEFROST 4 - 5 Hours
DEFROST CYCLE 13 - 15 Hours
DEFROSTING DEVICE Heater, Sheath
ANTI SWEAT HEATER Dispenser Duct Door Heater
Dispenser Heater
ANTI-FREEZING HEATER Water Injection Heater
Damper Heater
FREEZER LAMP 40W (1 EA)
REFRIGERATOR LAMP 40W (1 EA)
DISPENSER LAMP 15W (1 EA)
1750 1720 1750
600
948
890
660
711
755
1133.5
<Front View> <Plane View>
4. Ref No. : GR-L207

SPECIFICATIONS
- 8 -
ITEMS SPECIFICATIONS
DIMENSIONS (mm) 890(W) X 840(D) X 1750(H)
NET WEIGHT (kg) 117
COOLING SYSTEM Fan Cooling
TEMPERATURE CONTROL Micom Control
DEFROSTING SYSTEM Full Automatic
Heater Defrost
INSULATION Cyclo-Pentane
COMPRESSOR P.T.C. Starting Type
EVAPORATOR Fin Tube Type
CONDENSER Wire Condenser
REFRIGERANT R134a (180g)
LUBRICATING OIL FREOL @10G (310 cc)
CAPILLARY TUBE ID 0.83
DRIER MOLECULAR SIEVE XH-7
ITEMS SPECIFICATIONS
FIRST DEFROST 4 - 5 Hours
DEFROST CYCLE 13 - 15 Hours
DEFROSTING DEVICE Heater, Sheath
ANTI SWEAT HEATER Home Bar Heater
ANTI-FREEZING HEATER Damper Heater
FREEZER LAMP 40W (1 EA)
REFRIGERATOR LAMP 40W (1 EA)
DISPENSER LAMP 15W (1 EA)
1750 1720 1750
685
948
890
745
796
840
1218.5
<Front View> <Plane View>
1. Ref No. : GR-C247

SPECIFICATIONS
- 9 -
ITEMS SPECIFICATIONS
DIMENSIONS (mm) 890(W) X 755(D) X 1750(H)
NET WEIGHT (kg) 112
COOLING SYSTEM Fan Cooling
TEMPERATURE CONTROL Micom Control
DEFROSTING SYSTEM Full Automatic
Heater Defrost
INSULATION Cyclo-Pentane
COMPRESSOR P.T.C. Starting Type
EVAPORATOR Fin Tube Type
CONDENSER Wire Condenser
REFRIGERANT R134a (180g)
LUBRICATING OIL FREOL @10G (310 cc)
CAPILLARY TUBE ID 0.83
DRIER MOLECULAR SIEVE XH-7
1750 1720 1750
600
948
890
660
711
755
1133.5
<Front View> <Plane View>
2. Ref No. : GR-C207
ITEMS SPECIFICATIONS
FIRST DEFROST 4 - 5 Hours
DEFROST CYCLE 13 - 15 Hours
DEFROSTING DEVICE Heater, Sheath
ANTI SWEAT HEATER Home Bar Heater
ANTI-FREEZING HEATER Damper Heater
FREEZER LAMP 40W (1 EA)
REFRIGERATOR LAMP 40W (1 EA)
DISPENSER LAMP 15W (1 EA)

SPECIFICATIONS
- 10 -
ITEMS SPECIFICATIONS
DIMENSIONS (mm) 890(W) X 840(D) X 1750(H)
NET WEIGHT (kg) 114
COOLING SYSTEM Fan Cooling
TEMPERATURE CONTROL Micom Control
DEFROSTING SYSTEM Full Automatic
Heater Defrost
INSULATION Cyclo-Pentane
COMPRESSOR P.T.C. Starting Type
EVAPORATOR Fin Tube Type
CONDENSER Wire Condenser
REFRIGERANT R134a (180g)
LUBRICATING OIL FREOL @10G (310 cc)
CAPILLARY TUBE ID 0.83
ITEMS SPECIFICATIONS
DRIER MOLECULAR SIEVE XH-7
FIRST DEFROST 4 - 5 Hours
DEFROST CYCLE 13 - 15 Hours
DEFROSTING DEVICE Heater, Sheath
ANTI-FREEZING HEATER Damper Heater
FREEZER LAMP 40W (1 EA)
REFRIGERATOR LAMP 40W (1 EA)
DISPENSER LAMP 15W (1 EA)
1750 1720 1750
685
948
890
745
796
840
1218.5
<Front View> <Plane View>
3. Ref No. : GR-B247

SPECIFICATIONS
- 11-
ITEMS SPECIFICATIONS
DIMENSIONS (mm) 890(W) X 755(D) X 1750(H)
890(W)
X 725(D) X
1750(H)
NET WEIGHT (kg) 109 106
COOLING SYSTEM Fan Cooling
TEMPERATURE CONTROL Micom Control
DEFROSTING SYSTEM Full Automatic
Heater Defrost
INSULATION Cyclo-Pentane
COMPRESSOR P.T.C. Starting Type
EVAPORATOR Fin Tube Type
CONDENSER Wire Condenser
REFRIGERANT R134a (180g)
ITEMS SPECIFICATIONS
LUBRICATING OIL FREOL @10G (310 cc)
CAPILLARY TUBE ID 0.83
DRIER MOLECULAR SIEVE XH-7
FIRST DEFROST 4 - 5 Hours
DEFROST CYCLE 13 - 15 Hours
DEFROSTING DEVICE Heater, Sheath
ANTI-FREEZING HEATER Damper Heater
FREEZER LAMP 40W (1 EA)
REFRIGERATOR LAMP 40W (1 EA)
DISPENSER LAMP 15W (1 EA)
1750 1720 1750
600
948
890
660
711
755
1133.5
<Front View> <Plane View>
4. Ref No. : GR-B207 / GR-B197

PARTS IDENTIFICATION
- 12 -
Cover PWB
Water Tube
Cover Hinge
Home Bar
Frame Display
Dispenser Lamp
Ice & Water
Dispenser Button
Freezer
Compartment
Refrigerator
Compartment
Conversion Switch
(Meats/Vegetables) Humidity Switch
Vegetable
drawer/Meat drawer
Door rack
Refreshment center
(optional)
Door rack
(1 piece or 2 piece)
Door rack
(1 piece or 2 piece)
Milk product corner
Cover, Lamp-R/U
Shelf
Egg Box
Snack Corner
Vegetable Box
Folding Shelf
Wine Rack
Lamp
Lower Cover
Door rack
Automatic
ice maker
Door rack
Shelf
(Steel,
T/Glass)
Drawer
1. Ref No. : GR-P247, GR-P207

2. Ref No. : GR-P247, GR-P207
PARTS IDENTIFICATION
- 13 -
Cover PWB
Water Tube
Cover Hinge
Home Bar
Frame Display
Dispenser Lamp
Ice & Water
Dispenser Button
Freezer
Compartment
Refrigerator
Compartment
Conversion Switch
(Meats/Vegetables) Humidity Switch
Vegetable
drawer/Meat drawer
Door rack
Refreshment center
(optional)
Door rack
(1 piece or 2 piece)
Door rack
(1 piece or 2 piece)
Milk product corner
Cover, Lamp-R/U
Shelf
Egg Box
Snack Corner
Vegetable Box
Folding Shelf
Wine Rack
Lamp
Lower Cover
Door rack
Automatic
ice maker
Door rack
Shelf
(Steel,
T/Glass)
Drawer

PARTS IDENTIFICATION
- 14 -
Humidity Switch
Lamp
Shelf
(Steel,
T/Glass)
Lower Cover
Door rack
Drawer
Freezer
Compartment
Refrigerator
Compartment
Automatic
ice maker
Door rack
Cover PWB
Water Tube
Conversion Switch
(Meats/Vegetables)
Cover Hinge
Frame Display
Dispenser Lamp
Ice & Water
Dispenser Button
Shelf
Egg Box
Snack Corner
Vegetable Box
Vegetable
drawer/Meat drawer
Guide bottle
Milk product corner
Door rack
Door rack
(1 piece or 2 piece)
Door rack
(1 piece or 2 piece)
Cover, Lamp-R/U
Folding Shelf
Wine Rack
3. Ref No. : GR-L247, GR-L207

4. Ref No. : GR-L247, GR-L207
PARTS IDENTIFICATION
- 15 -
Conversion Switch
(Meats/Vegetables)
Humidity Switch
Lamp
Shelf
(Steel,
T/Glass)
Lower Cover
Door rack
Drawer
Freezer
Compartment
Refrigerator
Compartment
Automatic
ice maker
Door rack
Cover PWB
Water Tube
Cover Hinge
Frame Display
Dispenser Lamp
Ice & Water
Dispenser Button
Shelf
Egg Box
Vegetable Box
Vegetable
drawer/Meat drawer
Door rack
Guide bottle
Wine Rack
Milk product corner
Snack Corner
Door rack
(1 piece or 2 piece)
Door rack
(1 piece or 2 piece)
Cover, Lamp-R/U
Folding Shelf

PARTS IDENTIFICATION
- 16 -
Conversion Switch
(Meats/Vegetables)
Humidity Switch
Lamp
Ice Bank
Assembly
Shelf
(Steel,
T/Glass)
Lower Cover
Door rack
Drawer
Freezer
Compartment
Refrigerator
Compartment
Door rack
Cover PWB
Cover Hinge
Home Bar
Frame Display
Cover, Lamp-R/U
Shelf
Egg Box
Vegetable Box
Vegetable
drawer/Meat drawer
Door rack
Refreshment center
(optional)
Wine Rack
Milk product corner
Snack Corner
Door rack
(1 piece or 2 piece)
Door rack
(1 piece or 2 piece)
Folding Shelf
1. Ref No. : GR-C247, GR-C207

PARTS IDENTIFICATION
- 17 -
Cover PWB
Cover Hinge
Frame Display
Conversion Switch
(Meats/Vegetables)
Humidity Switch
Shelf
Egg Box
Vegetable Box
Vegetable
drawer/Meat drawer
Door rack
Lamp
Shelf
(Steel,
T/Glass)
Lower Cover
Milk product corner
Door rack
Drawer
Freezer
Compartment
Refrigerator
Compartment
Door rack
Ice Bank
Assembly
Wine Rack
Snack Corner
Door rack
(1 piece or 2 piece)
Folding Shelf
Door rack
(1 piece or 2 piece)
Cover, Lamp-R/U
3. Ref No. : GR-B247, GR-B207, GR-B197

1. How to Adjust Door Height of Refrigerator
■Make the refrigerator level first. (If the refrigerator is not installed on the flat floor, the height of freezer and refrigerator
door may not be the same.)
1. If the height of freezer door is lower than that of
refrigerator compartment :
2. If the height of freezer door is higher than that of
refrigerator compartment :
Insert a driver into the groove of adjusting screw
and rotate driver in arrow direction (clockwise) until the
refrigerator becomes horizontal.
Insert a driver into the groove of adjusting screw
and rotate driver in arrow direction (clockwise) until the
refrigerator becomes horizontal.
HOW TO INSTALL REFRIGERATOR
- 18 -
Adjusting
Screw
Driver
Height
Difference
Height
Difference
Height
Difference
Height
Difference
1
2

2. How to Install Water Pipe
■Before Installation
1. The icemaker requires the water pressure of 1.5 -
8.5kgf/cm2. (It is acceptable if city water fills a cup of
180cc with water for 3 seconds)
2. Install booster pump where the city water pressure is
below 1.5kgf/cm2for normal operation of water and ice
dispenser.
3. The total length of water pipe shall be less than 12m. Do
not bend the pipe at right angle. If the length is more
than 12m, there will be troubles on water supply due to
water pressure drop.
4. Please install water pipe where there is no heat around.
2-1. When connecting directly to the water tap.
■Please confirm the following installation parts.
HOW TO INSTALL REFRIGERATOR
- 19 -
Class. Shape and Spec. Nomenclature P/No Remarks
Valve Feed 5221JA3001A Common Use
Connector, (MECH) Pipe 4932JA3003A
Conversion Connector(3/4") 6631JA3004A No Holes
Balance Conector(3/4") 6631JA3004B
Packing(ø24x3t) 3920JA3001B
Connector, (MECH) Pipe 4932JA3003B
Conversion Connector(W25) 6631JA3004C No Holes
Balance Conectoor(W25) 6631JA3004D
Packing(ø23x3t) 3920JA3001A
Connector, (MECH) Pipe 4932JA3003C
Conversion Connector(W28) 6631JA3004E No Holes
Balance Conector(W28) 6631JA3004F
Packing(ø26x3t) 3920JA3001C
Connector, (MECH) Pipe 4932JA3003D
Conversion Connector(1/2") 6631JA3004G No Holes
Balance Conector(1/2") 6631JA3004H
Packing(ø19x3t) 3920JA3001D
Conve-
rtible
Water
Valve
Water
Conn-
ector
Valve Feed Rubber, Packing Connector, Pipe
Tape, TeflonConnector, Pipe

1. Connection of Pipe Connector A and B.
1) Turn off main valve of water pipe.
2) Disconnect water tap from piping by loosening nuts.
3) Connect pipe connector A and B to piping after sealing
the pipe connector with sealing tapes.
4) Connect feed valve to pipe connector A.
5) If there is only one tap water pipe, connect pipe
connector A only and install feed pipe.
2. Water Supply
1) After the installation of feed water, plug the refrigerator
to the earthered wall outlet, press the water dispenser
button for 2 - 3 minutes, and confirm that the water
comes out.
Caution : • Feed pipe should be connected to cold water
line. If it is connected to hot water line, trouble
may occur.
•Please check rubber packing when connecting
feed pipe.
2) Check leakage at connecting part, then arrange water
tube and locate the refrigerator at its regular place if
there is no leaking.
HOW TO INSTALL REFRIGERATOR
- 20 -
Single Lever Type Faucet
(general)
Feed
Valve
General Type
Feed
Valve
Two Hands Type Faucet Single Lever Type Faucet (one
hole, tech type and hand spray)
Feed
Valve
Feed
Valve
Pipe Connector B
Hot Water
Pipe Connector A
Feed
Valve
Cold Water
How to wind
Sealing Tapes.
Water Tube
Water Tube
Nut