LG LRSPC2051AB User manual

CAUTION
PLEASE READ CAREFULLY THE SAFETY PRECAUTIONS OF THIS BOOK
BEFORE CHECKING OR OPERATING THE REFRIGERATOR.
REFRIGERATOR
SERVICE MANUAL
MODEL: LRSPC2051AB / LRSPC2051BM
LRSPC2051ST COLOR: ATLANTIC BLUE
BLACK MIRROR
STAINLESS STEEL
http://biz.lgservice.com
Ref. No.
GR-L207NGUA
GR-L207NSUA

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 CONTROL THE AMOUNT OF WATER SUPPLIED TO THE ICEMAKER......................................................... 20
MICOM FUNCTION .............................................................................................................................................................. 22
EXPLANATION FOR MICOM CIRCUIT ............................................................................................................................... 30
EXPLANATION FOR PWB CIRCUIT ..................................................................................................................................30
COMPENSATION CIRCUIT FOR TOO WARM, TOO COLD AT FREEZER.......................................................................44
PWB PARTS DRAWING AND LIST ....................................................................................................................................47
PWB CIRCUIT DIAGRAM...................................................................................................................................................57
ICEMAKER AND DISPENSER OPERATION PRINCIPLE AND REPAIR METHOD........................................................... 61
WORKING PRINCIPLES.....................................................................................................................................................61
FUNCTION OF ICE MAKER...............................................................................................................................................62
ICEMAKER TROUBLESHOOTING.....................................................................................................................................65
ICEMAKER CIRCUIT PART................................................................................................................................................66
CIRCUIT................................................................................................................................................................................ 67
TROUBLE DIAGNOSIS........................................................................................................................................................ 69
TROUBLE SHOOTING ...................................................................................................................................................... 69
FAULTS .............................................................................................................................................................................. 79
COOLING CYCLE HEAVY REPAIR................................................................................................................................... 96
HOW TO DEAL WITH CLAIMS........................................................................................................................................ 103
HOW TO DISASSEMBLE AND ASSEMBLE..................................................................................................................... 108
DOOR............................................................................................................................................................................... 108
HANDLE........................................................................................................................................................................... 109
SHROUD, GRILLE FAN................................................................................................................................................... 109
ICEMAKER....................................................................................................................................................................... 109
DISPENSER..................................................................................................................................................................... 110
WATER TANK AND WATER LINE.................................................................................................................................... 112
HOME BAR....................................................................................................................................................................... 112
EXPLODED VIEW............................................................................................................................................................... 113
REPLACEMENT PARTS LIST ........................................................................................................................................... 122
CONTENTS
- 2 -

Please observe the following safety precautions to use the
refrigerator safely and correctly and to prevent accident or
injury when servicing.
1. Be careful 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 overloaded, it may cause fire. Please
use a dedicated circuit for the refrigerator.
5. Please make sure the outlet is properly grounded,
particularly in a wet or damp area.
6. Use standard electrical components.
7. Make sure the hooks are 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 for evidence of moisture intrusion in the
electrical components. Replace the parts or mask with
insulation tape 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 suggest that customers repair their refrigerator
themselves. This work requires special tools and
knowledge. Non-professionals could cause fire, injury,
or damage to the product.
12. Do not store flammable materials such as ether,
benzene, alcohol, chemicals, gas, or medicine in the
refrigerator.
13. Do not put anything on top of the refrigerator,
especially samething containing water, like a vase.
14. Do not put glass bottles with full of water into the
freezer. The contents will freeze and break the glass
bottles.
15. When you scrap or discard the refrigerator, please
remove the doors and dispose of it where children are
not likely to play in or around it.
WARNINGS AND PRECAUTIONS FOR SAFETY
- 3 -

SPECIFICATIONS
- 4 -
ITEMS SPECIFICATIONS
DIMENSIONS 898(W) X 847(D) X 1756(H)mm
(351/3
X 331/3 X 691/8in.)
NET WEIGHT 151kg (3327/8lbs.)
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 (185g) (61/2oz.)
LUBRICATING OIL FREOL @15G (320 cc)
DRIER 1Ø0.83
ITEMS SPECIFICATIONS
CAPILLARY TUBE MOLECULAR SIEVE XH-7
FIRST DEFROST 4 - 5 Hours
DEFROST CYCLE 13 - 15 Hours
DEFROSTING DEVICE Heater, Sheath
Heater, L - Cord
ANTI SWEAT HEATER Dispenser Duct Door Heater
Dispenser Heater
Home Bar Heater
ANTI-FREEZING HEATER Water Tank Heater
Damper Heater
FREEZER LAMP 40W (1 EA)
REFRIGERATOR LAMP 40W (1 EA)
DISPENSER LAMP 15W (1 EA)
948 (373/8)
685 (27)
745 (293/8)
796 (313/8)
847 (331/3)
1218.5 (48)
1756 (691/8)
898 (351/3)
<Front View> <Plane View>
1. Ref No. : GR-P247

SPECIFICATIONS
- 5 -
ITEMS SPECIFICATIONS
DIMENSIONS 898(W) X 762(D) X 1756(H)mm
(351/3
X 30 X 691/8in.)
NET WEIGHT 146kg (3217/8lbs.)
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 (185g) (61/2oz.)
LUBRICATING OIL FREOL @15G (320 cc)
DRIER 1Ø0.83
1756 (691/8)
898 (351/3)
948 (373/8)
600 (235/8)
660 (26)
711 (28)
762 (30)
1133.5 (445/8)
<Front View> <Plane View>
2. Ref No. : GR-P207
ITEMS SPECIFICATIONS
CAPILLARY TUBE MOLECULAR SIEVE XH-7
FIRST DEFROST 4 - 5 Hours
DEFROST CYCLE 13 - 15 Hours
DEFROSTING DEVICE Heater, Sheath
Heater, L - Cord
ANTI SWEAT HEATER Dispenser Duct Door Heater
Dispenser Heater
Home Bar Heater
ANTI-FREEZING HEATER Water Tank Heater
Damper Heater
FREEZER LAMP 40W (1 EA)
REFRIGERATOR LAMP 40W (1 EA)
DISPENSER LAMP 15W (1 EA)

SPECIFICATIONS
- 6 -
ITEMS SPECIFICATIONS
DIMENSIONS 898(W) X 847(D) X 1756(H)mm
(351/3
X 331/3 X 691/8in.)
NET WEIGHT 145kg (3192/3lbs.)
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 (185g) (61/2oz.)
LUBRICATING OIL FREOL @15G (320 cc)
ITEMS SPECIFICATIONS
DRIER 1Ø0.83
CAPILLARY TUBE MOLECULAR SIEVE XH-7
FIRST DEFROST 4 - 5 Hours
DEFROST CYCLE 13 - 15 Hours
DEFROSTING DEVICE Heater, Sheath
Heater, L-Cord
ANTI SWEAT HEATER Dispenser Duct Door Heater
Dispenser Heater
ANTI-FREEZING HEATER Water Tank Heater
Damper Heater
FREEZER LAMP 40W (1 EA)
REFRIGERATOR LAMP 40W (1 EA)
DISPENSER LAMP 15W (1 EA)
1756 (691/8)
898 (351/3)
948 (373/8)
685 (27)
745 (293/8)
796 (313/8)
847 (331/3)
1218.5 (48)
<Front View> <Plane View>
3. Ref No. : GR-L247

SPECIFICATIONS
- 7 -
ITEMS SPECIFICATIONS
DIMENSIONS 898(W) X 762(D) X 1756(H)mm
(351/3
X 30 X 691/8in.)
NET WEIGHT 140kg (3081/3lbs.)
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 (185g) (61/2oz.)
LUBRICATING OIL FREOL @15G (320 cc)
ITEMS SPECIFICATIONS
DRIER 1Ø0.83
CAPILLARY TUBE MOLECULAR SIEVE XH-7
FIRST DEFROST 4 - 5 Hours
DEFROST CYCLE 13 - 15 Hours
DEFROSTING DEVICE Heater, Sheath
Heater, L-Cord
ANTI SWEAT HEATER Dispenser Duct Door Heater
Dispenser Heater
ANTI-FREEZING HEATER Water Tank Heater
Damper Heater
FREEZER LAMP 40W (1 EA)
REFRIGERATOR LAMP 40W (1 EA)
DISPENSER LAMP 15W (1 EA)
1756 (691/8)
898 (351/3)
948 (373/8)
600 (235/8)
660 (26)
711 (28)
762 (30)
1133.5 (445/8)
<Front View> <Plane View>
4. Ref No. : GR-L207

SPECIFICATIONS
- 8 -
ITEMS SPECIFICATIONS
DIMENSIONS 898(W) X 847(D) X 1756(H)mm
(351/3
X 331/3 X 691/8in.)
NET WEIGHT 142kg (3131/2lbs.)
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 (185g) (61/2oz.)
LUBRICATING OIL FREOL @15G (320 cc)
ITEMS SPECIFICATIONS
DRIER 1Ø0.83
CAPILLARY TUBE MOLECULAR SIEVE XH-7
FIRST DEFROST 4 - 5 Hours
DEFROST CYCLE 13 - 15 Hours
DEFROSTING DEVICE Heater, Sheath
Heater, L - Cord
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)
1756 (691/8)
898 (351/3)
948 (373/8)
685 (27)
745 (293/8)
796 (313/8)
847 (331/3)
1218.5 (48)
<Front View> <Plane View>
1. Ref No. : GR-C247

SPECIFICATIONS
- 9 -
ITEMS SPECIFICATIONS
DIMENSIONS 898(W) X 762(D) X 1756(H)mm
(351/3
X 30 X 691/8in.)
NET WEIGHT 137kg (3022/7lbs.)
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 (185g) (61/2oz.)
LUBRICATING OIL FREOL @15G (320 cc)
1756 (691/8)
898 (351/3)
948 (373/8)
600 (235/8)
660 (26)
711 (28)
762 (30)
1133.5 (445/8)
<Front View> <Plane View>
2. Ref No. : GR-C207
ITEMS SPECIFICATIONS
DRIER 1Ø0.83
CAPILLARY TUBE MOLECULAR SIEVE XH-7
FIRST DEFROST 4 - 5 Hours
DEFROST CYCLE 13 - 15 Hours
DEFROSTING DEVICE Heater, Sheath
Heater, L - Cord
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 898(W) X 847(D) X 1756(H)mm
(351/3
X 331/3 X 691/8in.)
NET WEIGHT 140kg (3081/3lbs.)
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 (185g) (61/2oz.)
LUBRICATING OIL FREOL @15G (320 cc)
ITEMS SPECIFICATIONS
DRIER 1Ø0.83
CAPILLARY TUBE MOLECULAR SIEVE XH-7
FIRST DEFROST 4 - 5 Hours
DEFROST CYCLE 13 - 15 Hours
DEFROSTING DEVICE Heater, Sheath
Heater, L-Cord
ANTI-FREEZING HEATER Damper Heater
FREEZER LAMP 40W (1 EA)
REFRIGERATOR LAMP 40W (1 EA)
DISPENSER LAMP 15W (1 EA)
1756 (691/8)
898 (351/3)
948 (373/8)
685 (27)
745 (293/8)
796 (313/8)
847 (331/3)
1218.5 (48)
<Front View> <Plane View>
3. Ref No. : GR-B247

SPECIFICATIONS
- 11 -
ITEMS SPECIFICATIONS
DIMENSIONS 898(W) X 762(D) X 1756(H)mm
(351/3
X 30 X 691/8in.)
NET WEIGHT 135kg (2975/8lbs.)
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 (185g) (61/2oz.)
LUBRICATING OIL FREOL @15G (320 cc)
ITEMS SPECIFICATIONS
DRIER 1Ø0.83
CAPILLARY TUBE MOLECULAR SIEVE XH-7
FIRST DEFROST 4 - 5 Hours
DEFROST CYCLE 13 - 15 Hours
DEFROSTING DEVICE Heater, Sheath
Heater, L-Cord
ANTI-FREEZING HEATER Damper Heater
FREEZER LAMP 40W (1 EA)
REFRIGERATOR LAMP 40W (1 EA)
DISPENSER LAMP 15W (1 EA)
1756 (691/8)
898 (351/3)
948 (373/8)
600 (235/8)
660 (26)
711 (28)
762 (30)
1133.5 (445/8)
<Front View> <Plane View>
4. Ref No. : GR-B207

PARTS IDENTIFICATION
- 12 -
Conversion Switch
(Meats/Vegetables) Humidity Switch
Lamp
Shelf
Egg Box
Snack Drawer
Vegetable Drawer
Vegetable
Drawer/Meat Drawer
Door Rack
Refreshment Center
(optional)
Shelf
Door Rack
Wine Holder (optional)
Lamp
Drawer
or Shelf
(optional)
Lower Cover
Door Rack
Drawer
Freezer
Compartment Refrigerator Compartment
Automatic
icemaker
Door Rack
Cover PWB
Cover Hinge
Home Bar
Dairy Product Corner
Shelf
(Steel/
Tempered
Glass)
1. Ref No. : GR-P247, GR-P207

2. Ref No. : GR-P247, GR-P207
PARTS IDENTIFICATION
- 13 -
Conversion Switch
(Meats/Vegetables) Humidity Switch
Lamp
Shelf
Egg Box
Snack Drawer
Vegetable Drawer
Vegetable
Drawer/Meat Drawer
Door Rack
Refreshment Center
(optional)
Shelf
Door Rack
Wine Holder (optional)
Lamp
Drawer
or Shelf
(optional)
Lower Cover
Door Rack
Drawer
Freezer
Compartment Refrigerator Compartment
Automatic
icemaker
Door Rack
Cover PWB
Cover Hinge
Home Bar
Dairy Product Corner
Shelf
(Steel/
Tempered
Glass)

PARTS IDENTIFICATION
- 14 -
Humidity Switch
Lamp
Shelf
Egg Box
Snack Drawer
Vegetable Drawer
Vegetable
Drawer/Meat Drawer
Door Rack
Guide Bottle
Shelf
Door Rack
Wine Holder (optional)
Lamp
Drawer
or Shelf
(optional)
Lower Cover
Door Rack
Drawer
Freezer
Compartment Refrigerator Compartment
Automatic
icemaker
Door Rack
Conversion Switch
(Meats/Vegetables)
Cover PWB
Cover Hinge
Dairy Product Corner
Shelf
(Steel/
Tempered
Glass)
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
Egg Box
Snack Drawer
Vegetable Drawer
Vegetable
Drawer/Meat Drawer
Door Rack
Guide Bottle
Shelf
Door Rack
Wine Holder (optional)
Lamp
Drawer
or Shelf
(optional)
Lower Cover
Door Rack
Drawer
Freezer
Compartment Refrigerator Compartment
Automatic
icemaker
Door Rack
Cover PWB
Cover Hinge
Dairy Product Corner
Shelf
(Steel/
Tempered
Glass)

PARTS IDENTIFICATION
- 16 -
Conversion Switch
(Meats/Vegetables) Humidity Switch
Lamp
Shelf
Egg Box
Snack Drawer
Vegetable Drawer
Vegetable
Drawer/Meat Drawer
Door Rack
Refreshment Center
(optional)
Shelf
Door Rack
Wine Holder (optional)
Lamp
Icemaker
Drawer
or Shelf
(optional)
Lower Cover
Door Rack
Drawer
Freezer
Compartment Refrigerator Compartment
Door Rack
Cover PWB
Cover Hinge
Home Bar
Dairy Product Corner
Shelf
(Steel/
Tempered
Glass)
1. Ref No. : GR-C247, GR-C207

PARTS IDENTIFICATION
- 17 -
Conversion Switch
(Meats/Vegetables) Humidity Switch
Lamp
Shelf
Egg Box
Snack Drawer
Vegetable Drawer
Vegetable
Drawer/Meat Drawer
Door Rack
Shelf
Door Rack
Wine Holder (optional)
Lamp
Drawer
or Shelf
(optional)
Lower Cover
Door Rack
Drawer
Freezer
Compartment Refrigerator Compartment
Door Rack
Icemaker
Cover PWB
Cover Hinge
Dairy Product Corner
Shelf
(Steel/
Tempered
Glass)
3. Ref No. : GR-B247, GR-B207

1. How to Adjust Door Height of Refrigerator
■Make the refrigerator level first. (If the refrigerator is not installed on a flat floor, the height of freezer and refrigerator
door may not be the same.)
1. If the freezer door is lower than the refrigerator
door: 2. If the height of freezer door is higher than the refrigerator door:
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
■Install Water Filter (Applicable to some models)
■Before Installing water filter
1. Before installing the filter, take out the top shelf of the
refrigerator after tilting it to the direction () and lifting it
to the direction () and move it to the lower part.
2. Remove the lamp cover by pressing the protrusion
under the cover and pulling the cover to the front.
■Installing water filter
1. Initial installation of water filter
Remove the filter substitute cap by turning it
counterclockwise () by 90 degrees and pulling it down.
Note : Keep it hardy to use it later when you do not use the
filter.
Remove the red cap from the filter and attach the
sticker. Insert the upper part of the filter () after
aligning with the guideline marked on the control box,
and fasten it by turning it clockwise by 90 degrees.
Note : Check that the guideline and the fastening
indication line are aligned.
2. Replacement of water filter
While holding the lower part of the filter, turn it
counterclockwise () by 90 degrees and pull it down.
Note : Check that the guideline and the loosening
indication line are aligned.
■After installing water filter
Reassemble the lamp cover and the top shelf of the
refrigerator. To place the top shelf of the refrigerator, raise
the front part of the shelf a bit so that the hook of the shelf
is fit into the groove.
In order to clean the water filter system, drain water for
about 3 min.
Note : Then open the door of the refrigerator and check for
water drops on the shelf under the filter.
HOW TO INSTALL REFRIGERATOR
- 19 -
Control box
Aligning with the guide line
and the fastening indication line
Control box
Aligning with the guide line
and the loosening indication line
Removal
of red cap Sticker
Substitute
cap

3. How to Control the Amount of Water Supplied to Icemaker.
3-1. Confirm the amount of water supplied to the icemaker.
1. Pull out the ice bin in the upper part of the freezer compartment.
Caution : •Do not put hands or tools into the chute to confirm
the operation of geared motor.
it may damage refrigerator or injure hands.)
•Check the operation of motor by listening to its noise.
2. Apply electricity after connecting water pipe.
1) Press test switch under the icemaker for two seconds as shown below.
2) The bell rings(ding~dong), ice tray rotates, and water comes out from the icemaker water tube.
3) The water shall be supplied two or three times into the tray. The amount of water supplied for each time is small.
Put a water container under the ice tray and press test switch.
4) When ice tray rotates, the water in it will spill. Collect the spilled water and throw it into the sink.
5) When ice tray has finished rotation, water comes out from the water tube. Confirm the amounts of water in the ice tray.
(refer to Figure. The optimum amount of water is 110cc[6.7in3])
* It is acceptable if the adjusted level of water is a bit smaller than optimum level.
HOW TO INSTALL REFRIGERATOR
- 20 -
21
Test Switch
Confirm the amount
of water
Icemaker
Too much
Too little
Optimum level