LG GR-P277NI User manual

CAUTION
PLEASE READ CAREFULLY THE SAFETY PRECAUTIONS OF THIS MANUAL
BEFORE CHECKING OR OPERATING THE REFRIGERATOR.
REFRIGERATOR
SERVICE MANUAL
COLOR:TITANIUM
MODEL: GR-P277NI
Ref. No.
GR-P277ATBA
http://biz.lgservice.com

WARNINGS AND PRECAUTIONS FOR SAFETY ................................................................................................................ 3
SPECIFICATIONS................................................................................................................................................................... 4
PARTS IDENTIFICATION ....................................................................................................................................................... 8
HOW TO INSTALL THE REFRIGERATOR .......................................................................................................................... 12
HOW TO ADJUST DOOR HEIGHT.................................................................................................................................... 12
FILTER ............................................................................................................................................................................... 13
HOW TO CONTROL THE ICEMAKER WATER SUPPLY.................................................................................................. 14
MICOM FUNCTION .............................................................................................................................................................. 16
EXPLANATION OF MICOM CIRCUIT .................................................................................................................................. 30
EXPLANATION OF PWB CIRCUIT .....................................................................................................................................30
PWB PARTS DIAGRAM AND LIST.....................................................................................................................................49
PWB CIRCUIT DIAGRAM ...................................................................................................................................................61
OPERATION PRINCIPLE AND REPAIR METHOD OF ICEMAKER ................................................................................... 65
OPERATION PRINCIPLE................................................................................................................................................... 65
CONTROL METHOD ACCORDING TO FUNCTIONS....................................................................................................... 66
DEFECT DIAGNOSIS FUNCTION..................................................................................................................................... 68
CIRCUIT................................................................................................................................................................................ 69
TROUBLE DIAGNOSIS........................................................................................................................................................ 72
TROUBLESHOOTING ....................................................................................................................................................... 72
FAULTS .............................................................................................................................................................................. 82
COOLING CYCLE HEAVY REPAIR ................................................................................................................................... 99
HOW TO DEAL WITH CLAIMS........................................................................................................................................ 106
HOW TO DISASSEMBLE AND ASSEMBLE ..................................................................................................................... 111
DOOR ............................................................................................................................................................................... 111
HANDLE ........................................................................................................................................................................... 112
FAN SHROUD GRILLE .................................................................................................................................................... 113
ICEMAKER ASSEMBLY ................................................................................................................................................... 113
DISPENSER ..................................................................................................................................................................... 114
TV-RADIO ............................................................................................................................................................................115
EXPLODED VIEW .............................................................................................................................................................. 121
REPLACEMENT PARTS LIST ........................................................................................................................................... 134
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. Disconnect the power
whenever replacing and repairing electric components.
2. If disconnecting the power, wait at least 5 minutes
before plugging the unit back in.
3. Before touching the power cord, make sure the cord is
not damaged. If the power cord is damaged, it can
cause a fire or an electrical shock.
4. Make sure the unit has a dedicated circuit breaker.
Overloading the circuit can cause a fire.
5. Please make sure the outlet is properly grounded.
Particularly in a wet or damp area.
6. Use standard electrical components.
7. Remove dust and foreign materials from the housing
and connecting parts.
8. Do not fray, damage, run over, kink, 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 is confirmed.
10. Stay clear of the icemaker with hands or tools if the unit
has power. Do not try to manually turn the ice maker
even when turned off.
11. Customers should not repair the 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, or gas in the refrigerator.
13. Do not put anything on top of the refrigerator,
especially something containing water, like a vase.
14. Do not put glass bottles of water into the freezer. The
contents will freeze and break the bottles.
15. If you scrap or discard the refrigerator, 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 (W X D X H) 908 X 897 X 1771 mm
NET WEIGHT 145 kg
COOLING SYSTEM Fan Cooling
TEMPERATURE CONTROL Micom Control
DEFROSTING SYSTEM Full Automatic
Heater Defrost
INSULATION Cyclo-Pentane
COMPRESSOR PTC Starting Type
EVAPORATOR Fin Tube Type
CONDENSER Wire Condenser
REFRIGERANT R134a (185g)
LUBRICATING OIL FREOL @10G (320 cc)
ITEMS SPECIFICATIONS
DRIER MOLECULAR SIEVE XH-7
CAPILLARY TUBE ID Ø0.83
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 Tank Heater
Damper Heater
FREEZER LAMP 40W (1 EA)
REFRIGERATOR LAMP 40W (1 EA), 30W (1 EA)
DISPENSER LAMP 15W (1 EA)
724 mm
1004 mm
908 mm
779 mm 829 mm
897 mm
1261 mm
1741.5 mm 1746.5 mm
1771 mm 1771 mm
Front View Top View
Ref No. : GR-L267

SPECIFICATIONS
- 5 -
724 mm
1004 mm
908 mm
779 mm 829 mm
897 mm
1261 mm
1741.5 mm 1746.5 mm
1771 mm 1771 mm
Ref No. : GR-G267
ITEMS SPECIFICATIONS
DIMENSIONS (W X D X H) 908 X 897 X 1771 mm
NET WEIGHT 154 kg
COOLING SYSTEM Fan Cooling
TEMPERATURE CONTROL Micom Control
DEFROSTING SYSTEM Full Automatic
Heater Defrost
INSULATION Cyclo-Pentane
COMPRESSOR PTC Starting Type
EVAPORATOR Fin Tube Type
CONDENSER Wire Condenser
REFRIGERANT R134a (185g)
LUBRICATING OIL FREOL @10G (320 cc)
ITEMS SPECIFICATIONS
DRIER MOLECULAR SIEVE XH-7
CAPILLARY TUBE ID Ø0.83
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 Tank Heater
Damper Heater
FREEZER LAMP 40W (1 EA)
REFRIGERATOR LAMP
40W (4 EA), 40W (1 EA), 30W (1 EA)
DISPENSER LAMP 15W (1 EA)
Front View Top View

SPECIFICATIONS
- 6 -
ITEMS SPECIFICATIONS
DIMENSIONS (W X D X H) 908 X 943 X 1771 mm
NET WEIGHT 149 kg
COOLING SYSTEM Fan Cooling
TEMPERATURE CONTROL Micom Control
DEFROSTING SYSTEM Full Automatic
Heater Defrost
INSULATION Cyclo-Pentane
COMPRESSOR PTC Starting Type
EVAPORATOR Fin Tube Type
CONDENSER Wire Condenser
REFRIGERANT R134a (185g)
LUBRICATING OIL FREOL @10G (320 cc)
ITEMS SPECIFICATIONS
DRIER MOLECULAR SIEVE XH-7
CAPILLARY TUBE ID Ø0.83
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 (4 EA), 40W (1 EA), 30W (1 EA)
DISPENSER LAMP 15W (1 EA)
724 mm
1004 mm
908 mm
779 mm 829 mm
897 mm
1261 mm
1741.5 mm 1746.5 mm
1771 mm 1771 mm
Ref No. : GR-B277
Front View Top View

SPECIFICATIONS
- 7 -
ITEMS SPECIFICATIONS
DIMENSIONS (W X D X H) 908 X 943 X 1771 mm
NET WEIGHT 149 kg
COOLING SYSTEM Fan Cooling
TEMPERATURE CONTROL Micom Control
DEFROSTING SYSTEM Full Automatic
Heater Defrost
INSULATION Cyclo-Pentane
COMPRESSOR PTC Starting Type
EVAPORATOR Fin Tube Type
CONDENSER Wire Condenser
REFRIGERANT R134a (185g)
LUBRICATING OIL FREOL @10G (320 cc)
ITEMS SPECIFICATIONS
DRIER MOLECULAR SIEVE XH-7
CAPILLARY TUBE ID Ø0.83
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 Tank Heater
Damper Heater
FREEZER LAMP 40W (1 EA)
REFRIGERATOR LAMP 40W (1 EA), 30W (1 EA)
DISPENSER LAMP 15W (1 EA)
724 mm
1004 mm
908 mm
779 mm 829 mm 892 mm
1261 mm
1741.5 mm 1746.5 mm
1771 mm 1771 mm
Front View Top View
Ref No. : GR-P277

PARTS IDENTIFICATION
- 8 -
Dairy Compartment
Water Filter
Lamp (Upper)
Shelf
Door Rack
Wine holder (Optional)
Shelf
Snack Drawer
Egg Box
Lamp (Lower)
Bottle Guide
Vegetable Drawer
Door Rack
Optichill (Optional)
Freezer
Compartment
Refrigerator
Compartment
Door Rack
Automatic
Ice Maker
Lamp
Shelf
(steel or glass)
Jet Freezing
(Optional)
Door Rack
Drawer (2 or 3)
Door Rack
Lower Cover
Display Panel
Dispenser Lamp
Ice & Water
Dispenser Button
PCB Cover
Water Tubes
Optichill Display
Humidity Switch
Ref No. : GR-L267

Ref No. : GR-G267
PARTS IDENTIFICATION
- 9 -
Dairy Compartment
Water Filter
Lamp (Upper)
Shelf
Door Rack
Wine holder (Optional)
Shelf
Snack Drawer
Egg Box
Lamp (Lower)
Bottle Guide
Vegetable Drawer
Door Rack
Optichill (Optional)
Freezer
Compartment
Refrigerator
Compartment
Door Rack
Automatic
Ice Maker
Lamp
Shelf
(steel or glass)
Jet Freezing
(Optional)
Door Rack
Drawer (2 or 3)
Door Rack
Lower Cover
PCB Cover
Water Tubes
Optichill Display
Humidity Switch
Display Panel
Dispenser Lamp
Ice & Water
Dispenser Button

PARTS IDENTIFICATION
- 10 -
Control Box
Dairy Compartment
Lamp (Upper)
Shelf
Wine Rack (Optional)
Shelf
Shelf
Snack Drawer
Egg Box
Lamp (Lower)
Vegetable Drawer
Door Rack
Shelf
Drawer
Door Rack
Drawer
(1 or 2)
Lower Cover
PCB Cover
Optichill Display
Adjust Screw
Humidity Switch
Door Rack
Triple & Movable
Twist Ice Tray
Display Panel
Door Switch
Ref No. : GR-B277