LG Gr P227 Ytqa Service Manual

							CAUTION
PLEASE READ CAREFULLY THE SAFETY PRECAUTIONS OF THIS BOOK 
BEFORE CHECKING OR OPERATING THE REFRIGERATOR.
        REFRIGERATOR
SERVICE MANUAL
Ref No : 
GW-L227Ref No : 
GW-C227Ref No : 
GW-B227 Ref No : 
GW-P227
http://biz.lgservice.com
 
						

							WARNINGS AND PRECAUTIONS FOR SAFETY  ................................................................................................................ 3
SPECIFICATIONS................................................................................................................................................................... 4
PARTS IDENTIFICATION ........................................................................................................................................................5
HOW TO INSTALL THE REFRIGERATOR ............................................................................................................................ 8
HOW TO ADJUST DOOR HEIGHT OF THE REFRIGERATOR .......................................................................................... 8
HOW TO INSTALL WATER PIPE ..........................................................................................................................................9
HOW TO CONTROL THE AMOUNT OF WATER SUPPLIED TO THE ICEMAKER ......................................................... 13
MICOM FUNCTION .............................................................................................................................................................. 15
EXPLATION FOR MICOM CIRCUIT..................................................................................................................................... 26
EXPLANATION FOR PWB CIRCUIT ................................................................................................................................. 26
COMPENSATION CIRCUIT FOR WEAK-COLD, OVER-COLD AT FREEZING ROOM.................................................... 54
PWB PARTS DRAWING AND LIST ................................................................................................................................... 55
ICE MAKER AND DISPENSER WORKING PRINCIPLES AND REPAIR ...........................................................................67
WORKING PRINCIPLES.................................................................................................................................................... 67
FUNCTION OF ICE MAKER .............................................................................................................................................. 67
ICE MAKER TROUBLESHOOTING................................................................................................................................... 71
CIRCUIT ................................................................................................................................................................................ 73
TROUBLE DIAGNOSIS ........................................................................................................................................................ 75
TROUBLE SHOOTING ...................................................................................................................................................... 75
FAULTS .............................................................................................................................................................................. 85
COOLING CYCLE HEAVY REPAIR ................................................................................................................................. 102
HOW TO DEAL WITH CLAIMS ........................................................................................................................................ 109
HOW TO DISASSEMBLE AND ASSEMBLE ..................................................................................................................... 114
DOOR ............................................................................................................................................................................... 114
HANDLE ........................................................................................................................................................................... 115
SHROUD, GRILLE FAN ................................................................................................................................................... 115
ICEMAKER ....................................................................................................................................................................... 115
WATER VALVE DISASSEMBLY METHOD .......................................................................................................................116
FAN and FAN MOTOR DISASSEMBLY METHOD ............................................................................................................116
DISPENSER ..................................................................................................................................................................... 117
HOME BAR ....................................................................................................................................................................... 118
EXPLODED VIEW .............................................................................................................................................................. 120
REPLACEMENT PARTS LIST ........................................................................................................................................... 129
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) 894(W)X753(D)X1753(H)
NET WEIGHT (kg)
128(P227), 123(L227),119(B227),114(B227)
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)
DRIER ID 0.83
CAPILLARY TUBE MOLECULAR SIEVE XH-7
1753
894
600
690
753
1130
 
1. Ref No. : GW-P227/L227/C227/B227
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 Damper Heater
FREEZER LAMP 40W (1 EA)
REFRIGERATOR LAMP 40W (1 EA) or 40W (2 EA)
 
						

							PARTS IDENTIFICATION
- 5 -
Cover PWB
Water Tube
Home Bar Dispenser Cover 
Assembly
Ice & Water
Dispenser Button
Freezer 
CompartmentRefrigerator 
Compartment
Milk product corner
Lamp
Shelf
Lamp Automatic
Icemaker
Shelf or Drawer
Shelf or Drawer
Door rack
Drawer (2 or 3)
Door rack
Lower coverShelf
Refreshment center (Optional)
Can Server (Optional)
Egg Box
Vegetable Drawer
(1 or 2) Door Rack
Wine holder (Plastic or wire)
Door Rack
Conversion switch
(Meats/Vegetables)
(Optional)
DrawerSnack drawer (Optional)
Shelf (Folding or Normal)
Miracle Zone (Optional)
Fresh compartment
(Optional) Humidity switch
1. Ref No. : GW-P227/L227(INTERNAL FILTER)
*L227: Non Home bar
 
						

							2. Ref No. : GW-P227/L227(EXTERNAL FILTER)
PARTS IDENTIFICATION
- 6 -
Dispenser Cover 
Assembly
Freezer 
CompartmentRefrigerator 
Compartment
Milk product corner
Lamp
Shelf
Lamp Automatic
Icemaker
Shelf or Drawer
Shelf or Drawer
Door rack
Drawer (2 or 3)
Door rack
Lower coverShelf
Refreshment center (Optional)
Can Server (Optional)
Egg Box
Vegetable Drawer
(1 or 2) Door Rack
Wine holder (Plastic or wire)
Door Rack
Conversion switch
(Meats/Vegetables)
(Optional)
DrawerSnack drawer (Optional)
Shelf (Folding or Normal)
Miracle Zone (Optional)
Fresh compartment
(Optional) Humidity switch
Cover PWB
Home Bar
Ice & Water
Dispenser Button
*L227: Non Home bar
 
						

							PARTS IDENTIFICATION
- 7 -
Cover PWB
Home Bar Frame Display
Freezer 
CompartmentRefrigerator 
Compartment
Milk product corner
Lamp
Shelf
Lamp
Door rack
Shelf or Drawer
Shelf or Drawer
Door rack
Drawer (2 or 3)
Door rack
Lower coverShelf
Refreshment center (Optional)
Door rack (1piece or 2piece)
Egg Box
Vegetable Drawer
(1 or 2)
Wine holder (Plastic or wire)
Door Rack
Door rack (1piece or 2piece)
Conversion switch
(Meats/Vegetables)
(Optional)
Snack drawer (Optional)
Shelf (Folding or Normal)
Miracle Zone (Optional)
Fresh compartment
(Optional) Humidity switch
3. Ref No. : GW-C227/B227
*B227: Non Home bar
 
						

							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
- 8 -


1
1
2
2
Adjusting Adjusting
Driver Driver
 
						

							2. How to Install Water Pipe
Before Installation
1. The icemaker requires the water pressure of 1.5 -
8.5kgf/cm
2. (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/cm
2for 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
- 9 -
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, Teflon Connector, 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
- 10 -
Single Lever Type Faucet
(general)
Feed
ValveGeneral Type
Feed
Valve
Two Hands Type Faucet Single Lever Type Faucet (one
hole, tech type and hand spray)
Feed
ValveFeed
Valve Pipe Connector B
Hot WaterPipe Connector AFeed
Valve
Cold Water
How to wind
Sealing Tapes.
Water Tube
Water Tube
Nut