Text preview for : ServiceManuals_LG_Fridge_GRB207NI_GR-B207NI Service Manual.pdf part of LG See Description Ref. No: GR-P207 GR-P247 GR-L207ERA GR-L207TRA GR-L247TRA GR-C207 GR-C247 GR-B207 GR-B247.



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REFRIGERATOR SERVICE MANUAL
CAUTION
PLEASE READ CAREFULLY THE SAFETY PRECAUTIONS OF THIS BOOK BEFORE CHECKING OR OPERATING THE REFRIGERATOR.

Ref. No. GR-P207 GR-P247

Ref. No. GR-L207ERA GR-L207TRA GR-L247TRA

Ref. No. GR-C207 GR-C247

Ref. No. GR-B207 GR-B247

MODEL:

COLOR: SUPER WHITE NOBLE INOX

CONTENTS
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.....................................................47 PWB PARTS DRAWING AND LIST ....................................................................................................................................50 PWB CIRCUIT DIAGRAM ...................................................................................................................................................60 ICE MAKER AND DISPENSER OPERATION PRINCIPLE AND REPAIR METHOD.......................................................... 64 WORKING PRINCIPLES.....................................................................................................................................................64 FUNCTION OF ICE MAKER ...............................................................................................................................................65 ICE MAKER TROUBLESHOOTING....................................................................................................................................68 ICE MAKER CIRCUIT PART ...............................................................................................................................................69 CIRCUIT ................................................................................................................................................................................ 70 TROUBLE DIAGNOSIS ........................................................................................................................................................ 72 TROUBLE SHOOTING ...................................................................................................................................................... 72 FAULTS .............................................................................................................................................................................. 82 COOLING CYCLE HEAVY REPAIR ................................................................................................................................... 99 HOW TO DEAL WITH CLAIMS ........................................................................................................................................ 106 HOW TO DISASSEMBLE AND ASSEMBLE ..................................................................................................................... 111 DOOR ............................................................................................................................................................................... 111 HANDLE ........................................................................................................................................................................... 112 SHROUD, GRILLE FAN ................................................................................................................................................... 112 ICEMAKER ....................................................................................................................................................................... 112 DISPENSER ..................................................................................................................................................................... 113 WATER TANK AND WATER LINE.................................................................................................................................... 115 HOME BAR....................................................................................................................................................................... 115 EXPLODED VIEW............................................................................................................................................................... 116 REPLACEMENT PARTS LIST ........................................................................................................................................... 125

-2-

WARNINGS AND PRECAUTIONS FOR SAFETY
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.

-3-

SPECIFICATIONS
1. Ref No. : GR-P247
ITEMS DIMENSIONS (mm) NET WEIGHT (kg) COOLING SYSTEM TEMPERATURE CONTROL DEFROSTING SYSTEM SPECIFICATIONS 890(W)X840(D)X1750(H) 128 Fan Cooling Micom Control Full Automatic Heater Defrost INSULATION COMPRESSOR EVAPORATOR CONDENSER REFRIGERANT LUBRICATING OIL DRIER CAPILLARY TUBE Cyclo-Pentane P.T.C. Starting Type Fin Tube Type Wire Condenser R134a (185g) FREOL @15G (320 cc) 1Ø0.83 MOLECULAR SIEVE XH-7 FREEZER LAMP REFRIGERATOR LAMP DISPENSER LAMP ANTI-FREEZING HEATER ANTI SWEAT HEATER ITEMS FIRST DEFROST DEFROST CYCLE DEFROSTING DEVICE SPECIFICATIONS 4 - 5 Hours 13 - 15 Hours Heater, Sheath Heater, L - Cord Dispenser Duct Door Heater Dispenser Heater Home Bar Heater Water Tank Heater Damper Heater 40W (1 EA) 40W (1 EA) 15W (1 EA)

948 890

1750

1720



1750



-4-

685 745 796 840 1218.5

SPECIFICATIONS
2. Ref No. : GR-P207
ITEMS DIMENSIONS (mm) NET WEIGHT (kg) COOLING SYSTEM TEMPERATURE CONTROL DEFROSTING SYSTEM SPECIFICATIONS 890(W)X755(D)X1750(H) 123 Fan Cooling Micom Control Full Automatic Heater Defrost INSULATION COMPRESSOR EVAPORATOR CONDENSER REFRIGERANT LUBRICATING OIL DRIER CAPILLARY TUBE Cyclo-Pentane P.T.C. Starting Type Fin Tube Type Wire Condenser R134a (185g) FREOL @15G (320 cc) 1Ø0.83 MOLECULAR SIEVE XH-7 FREEZER LAMP REFRIGERATOR LAMP DISPENSER LAMP ANTI-FREEZING HEATER ANTI SWEAT HEATER ITEMS FIRST DEFROST DEFROST CYCLE DEFROSTING DEVICE SPECIFICATIONS 4 - 5 Hours 13 - 15 Hours Heater, Sheath Heater, L - Cord Dispenser Duct Door Heater Dispenser Heater Home Bar Heater Water Tank Heater Damper Heater 40W (1 EA) 40W (1 EA) 15W (1 EA)

948 890

1750

1720



1750



-5-

600 660 711 755 1133.5

SPECIFICATIONS
3. Ref No. : GR-L247
ITEMS DIMENSIONS (mm) NET WEIGHT (kg) COOLING SYSTEM TEMPERATURE CONTROL DEFROSTING SYSTEM SPECIFICATIONS 890(W)X840(D)X1750(H) 125 Fan Cooling Micom Control Full Automatic Heater Defrost INSULATION COMPRESSOR EVAPORATOR CONDENSER REFRIGERANT LUBRICATING OIL DRIER Cyclo-Pentane P.T.C. Starting Type Fin Tube Type Wire Condenser R134a (185g) FREOL @15G (320 cc) 1Ø0.83 FREEZER LAMP REFRIGERATOR LAMP DISPENSER LAMP ANTI-FREEZING HEATER ANTI SWEAT HEATER ITEMS CAPILLARY TUBE FIRST DEFROST DEFROST CYCLE DEFROSTING DEVICE SPECIFICATIONS MOLECULAR SIEVE XH-7 4 - 5 Hours 13 - 15 Hours Heater, Sheath Heater, L-Cord Dispenser Duct Door Heater Dispenser Heater Water Tank Heater Damper Heater 40W (1 EA) 40W (1 EA) 15W (1 EA)

948 890

1750

1720



1750



-6-

685 745 796 840 1218.5

SPECIFICATIONS
4. Ref No. : GR-L207
ITEMS DIMENSIONS (mm) NET WEIGHT (kg) COOLING SYSTEM TEMPERATURE CONTROL DEFROSTING SYSTEM SPECIFICATIONS 890(W)X755(D)X1750(H) 120 Fan Cooling Micom Control Full Automatic Heater Defrost INSULATION COMPRESSOR EVAPORATOR CONDENSER REFRIGERANT LUBRICATING OIL DRIER Cyclo-Pentane P.T.C. Starting Type Fin Tube Type Wire Condenser R134a (185g) FREOL @15G (320 cc) 1Ø0.83 FREEZER LAMP REFRIGERATOR LAMP DISPENSER LAMP ANTI-FREEZING HEATER ANTI SWEAT HEATER ITEMS CAPILLARY TUBE FIRST DEFROST DEFROST CYCLE DEFROSTING DEVICE SPECIFICATIONS MOLECULAR SIEVE XH-7 4 - 5 Hours 13 - 15 Hours Heater, Sheath Heater, L-Cord Dispenser Duct Door Heater Dispenser Heater Water Tank Heater Damper Heater 40W (1 EA) 40W (1 EA) 15W (1 EA)

948 890

1750

1720



1750



-7-

600 660 711 755 1133.5

SPECIFICATIONS
1. Ref No. : GR-C247
ITEMS DIMENSIONS (mm) NET WEIGHT (kg) COOLING SYSTEM TEMPERATURE CONTROL DEFROSTING SYSTEM SPECIFICATIONS 890(W)X840(D)X1750(H) 117 Fan Cooling Micom Control Full Automatic Heater Defrost INSULATION COMPRESSOR EVAPORATOR CONDENSER REFRIGERANT LUBRICATING OIL DRIER CAPILLARY TUBE Cyclo-Pentane P.T.C. Starting Type Fin Tube Type Wire Condenser R134a (185g) FREOL @15G (320 cc) 1Ø0.83 MOLECULAR SIEVE XH-7 ANTI SWEAT HEATER ANTI-FREEZING HEATER FREEZER LAMP REFRIGERATOR LAMP DISPENSER LAMP ITEMS FIRST DEFROST DEFROST CYCLE DEFROSTING DEVICE SPECIFICATIONS 4 - 5 Hours 13 - 15 Hours Heater, Sheath Heater, L - Cord Home Bar Heater Damper Heater 40W (1 EA) 40W (1 EA) 15W (1 EA)

948 890

1750

1720



1750



-8-

685 745 796 840 1218.5

SPECIFICATIONS
2. Ref No. : GR-C207
ITEMS DIMENSIONS (mm) NET WEIGHT (kg) COOLING SYSTEM TEMPERATURE CONTROL DEFROSTING SYSTEM SPECIFICATIONS 890(W)X755(D)X1750(H) 112 Fan Cooling Micom Control Full Automatic Heater Defrost INSULATION COMPRESSOR EVAPORATOR CONDENSER REFRIGERANT LUBRICATING OIL DRIER CAPILLARY TUBE Cyclo-Pentane P.T.C. Starting Type Fin Tube Type Wire Condenser R134a (185g) FREOL @15G (320 cc) 1Ø0.83 MOLECULAR SIEVE XH-7 ANTI SWEAT HEATER ANTI-FREEZING HEATER FREEZER LAMP REFRIGERATOR LAMP DISPENSER LAMP ITEMS FIRST DEFROST DEFROST CYCLE DEFROSTING DEVICE SPECIFICATIONS 4 - 5 Hours 13 - 15 Hours Heater, Sheath Heater, L - Cord Home Bar Heater Damper Heater 40W (1 EA) 40W (1 EA) 15W (1 EA)

948 890

1750

1720



1750



-9-

600 660 711 755 1133.5

SPECIFICATIONS
3. Ref No. : GR-B247
ITEMS DIMENSIONS (mm) NET WEIGHT (kg) COOLING SYSTEM TEMPERATURE CONTROL DEFROSTING SYSTEM SPECIFICATIONS 890(W)X840(D)X1750(H) 114 Fan Cooling Micom Control Full Automatic Heater Defrost INSULATION COMPRESSOR EVAPORATOR CONDENSER REFRIGERANT LUBRICATING OIL DRIER Cyclo-Pentane P.T.C. Starting Type Fin Tube Type Wire Condenser R134a (185g) FREOL @15G (320 cc) 1Ø0.83 ANTI-FREEZING HEATER FREEZER LAMP REFRIGERATOR LAMP DISPENSER LAMP ITEMS CAPILLARY TUBE FIRST DEFROST DEFROST CYCLE DEFROSTING DEVICE SPECIFICATIONS MOLECULAR SIEVE XH-7 4 - 5 Hours 13 - 15 Hours Heater, Sheath Heater, L-Cord Damper Heater 40W (1 EA) 40W (1 EA) 15W (1 EA)

948 890

1750

1720



1750



- 10 -

685 745 796 840 1218.5

SPECIFICATIONS
4. Ref No. : GR-B207
ITEMS DIMENSIONS (mm) NET WEIGHT (kg) COOLING SYSTEM TEMPERATURE CONTROL DEFROSTING SYSTEM SPECIFICATIONS 890(W)X755(D)X1750(H) 109 Fan Cooling Micom Control Full Automatic Heater Defrost INSULATION COMPRESSOR EVAPORATOR CONDENSER REFRIGERANT LUBRICATING OIL DRIER Cyclo-Pentane P.T.C. Starting Type Fin Tube Type Wire Condenser R134a (185g) FREOL @15G (320 cc) 1Ø0.83 ANTI-FREEZING HEATER FREEZER LAMP REFRIGERATOR LAMP DISPENSER LAMP ITEMS CAPILLARY TUBE FIRST DEFROST DEFROST CYCLE DEFROSTING DEVICE SPECIFICATIONS MOLECULAR SIEVE XH-7 4 - 5 Hours 13 - 15 Hours Heater, Sheath Heater, L-Cord Damper Heater 40W (1 EA) 40W (1 EA) 15W (1 EA)

948 890

1750

1720



1750



- 11 -

600 660 711 755 1133.5

PARTS IDENTIFICATION
1. Ref No. : GR-P247, GR-P207
Cover Hinge

Cover PWB

Frame Display Water Tube Dispenser Lamp Ice & Water Dispenser Button

Home Bar

Freezer Compartment Door rack

Refrigerator Compartment Milk product corner Lamp Shelf

Automatic ice maker Lamp

Door rack Wine holder (optional) Egg Box Snack drawer Refreshment center (optional) Shelf Door rack Vegetable drawer Vegetable drawer/Meat drawer Conversion Switch (Meats/Vegetables) Humidity Switch

Shelf (Steel, T/Glass) Drawer or Shelf (optional) Drawer Door rack Lower Cover

- 12 -

PARTS IDENTIFICATION
2. Ref No. : GR-P247, GR-P207
Cover Hinge

Cover PWB

Frame Display Water Tube Dispenser Lamp Ice & Water Dispenser Button

Home Bar

Freezer Compartment Door rack

Refrigerator Compartment Milk product corner Lamp Shelf

Automatic ice maker Lamp

Door rack Wine holder (optional) Egg Box Snack drawer Refreshment center (optional) Shelf Door rack Vegetable drawer Vegetable drawer/Meat drawer Conversion Switch (Meats/Vegetables) Humidity Switch

Shelf (Steel, T/Glass) Drawer or Shelf (optional) Drawer Door rack Lower Cover

- 13 -

PARTS IDENTIFICATION
3. Ref No. : GR-L247, GR-L207
Cover Hinge

Cover PWB

Frame Display Water Tube Dispenser Lamp Ice & Water Dispenser Button

Freezer Compartment Door rack

Refrigerator Compartment Milk product corner Lamp Shelf

Automatic ice maker Lamp

Door rack Wine holder (optional) Egg Box Snack drawer Guide bottle

Shelf (Steel, T/Glass) Drawer or Shelf (optional) Drawer Door rack Lower Cover Conversion Switch (Meats/Vegetables) Humidity Switch

Shelf Door rack Vegetable drawer Vegetable drawer/Meat drawer

- 14 -

PARTS IDENTIFICATION
4. Ref No. : GR-L247, GR-L207
Cover Hinge

Cover PWB

Frame Display Water Tube Dispenser Lamp Ice & Water Dispenser Button

Freezer Compartment Door rack

Refrigerator Compartment Milk product corner Lamp Shelf

Automatic ice maker Lamp

Door rack Wine holder (optional) Egg Box Snack drawer Guide bottle

Shelf (Steel, T/Glass) Drawer or Shelf (optional) Drawer Door rack Lower Cover Conversion Switch (Meats/Vegetables) Humidity Switch

Shelf Door rack Vegetable drawer Vegetable drawer/Meat drawer

- 15 -

PARTS IDENTIFICATION
1. Ref No. : GR-C247, GR-C207
Cover Hinge

Cover PWB

Frame Display

Home Bar

Freezer Compartment Door rack Ice Bank Assy

Refrigerator Compartment Milk product corner Lamp Shelf Door rack Wine holder (optional)

Lamp

Egg Box Snack drawer Refreshment center (optional) Shelf Door rack Vegetable drawer Vegetable drawer/Meat drawer Conversion Switch (Meats/Vegetables) Humidity Switch

Shelf (Steel, T/Glass) Drawer or Shelf (optional) Drawer Door rack Lower Cover

- 16 -

PARTS IDENTIFICATION
3. Ref No. : GR-B247, GR-B207
Cover Hinge

Cover PWB

Frame Display

Freezer Compartment Door rack Ice Bank Assy

Refrigerator Compartment Milk product corner Lamp Shelf Door rack Wine holder (optional)

Lamp

Egg Box Snack drawer

Shelf (Steel, T/Glass) Drawer or Shelf (optional) Drawer Door rack Lower Cover Conversion Switch (Meats/Vegetables) Humidity Switch

Shelf Door rack Vegetable drawer Vegetable drawer/Meat drawer

- 17 -

HOW TO INSTALL REFRIGERATOR
1. How to Adjust Door Height of Refrigerator
I 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 :

Height Difference

Height Difference

Height Difference

Height Difference

1 Adjusting Screw 2 Driver

Insert a driver · into the groove ³ of adjusting screw and rotate driver in arrow direction (clockwise) until the refrigerator becomes horizontal.

Insert a driver · into the groove ³ of adjusting screw and rotate driver in arrow direction (clockwise) until the refrigerator becomes horizontal.

- 18 -

HOW TO INSTALL REFRIGERATOR
2. How to Install Water Pipe
I 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/cm2 for 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. I Please confirm the following installation parts.

Valve Feed

Rubber, Packing

Connector, Pipe

Connector, Pipe

Tape, Teflon

Class.

Shape and Spec.

Nomenclature

P/No

Remarks

Convertible Water Valve

Valve Feed

5221JA3001A

Common Use

Water Connector Connector, (MECH) Pipe

Connector, (MECH) Pipe Conversion Connector(3/4") Balance Conector(3/4") Packing(ø24x3t) 4932JA3003B Conversion Connector(W25) Balance Conectoor(W25) Packing(ø23x3t) Connector, (MECH) Pipe Conversion Connector(W28) Balance Conector(W28) Packing(ø26x3t) Connector, (MECH) Pipe Conversion Connector(1/2") Balance Conector(1/2") Packing(ø19x3t)

4932JA3003A 6631JA3004A 6631JA3004B 3920JA3001B 6631JA3004C 6631JA3004D 3920JA3001A 4932JA3003C 6631JA3004E 6631JA3004F 3920JA3001C 4932JA3003D 6631JA3004G 6631JA3004H 3920JA3001D

No Holes

No Holes

No Holes

No Holes

- 19 -

HOW TO INSTALL REFRIGERATOR
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. 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.

Single Lever Type Faucet (general) Pipe Connector B Hot Water Pipe Connector A Cold Water

General Type

Feed Valve Feed Valve Feed Valve

Two Hands Type Faucet

Single Lever Type Faucet (one hole, tech type and hand spray)

How to wind Sealing Tapes.

Feed Valve

Feed Valve

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. 2) Check leakage at connecting part, then arrange water tube and locate the refrigerator at its regular place if there is no leaking.

Water Tube

Water Tube Nut

- 20 -

HOW TO INSTALL REFRIGERATOR
3. When customer uses bottled water. *If customer wants to use bottled water, extra pump should be installed as shown below. 1. The pump system should not be on the floor (it may cause noise and vibration). Securely fasten the inlet and outlet nuts of pump. 2. If there is any leakage after installation, cut the water tube at right angle and reassemble. 3. When put the water tube end into the bottle, leave a clearance between bottle bottom and water tube end. 4 Check water coming out and any leakage. Caution : · If feed tube is more than 4m, less water will come out due to pressure drops. · Use standard feed tube to prevent leaking.

I Outternal Filter 1. Filter Fixation 1) Connect feed tube to the filter outlet and water valve connecting tube. 2) Fix the filter at proper place around the sink where it is easy to replace the filter and to receive the cleaning water. Please consider the length of tube shall be less than 12m when locating filter. 3) When fixing the filter, use fixing plate and cable depending on the surrounding conditions.
Inlet Water Tube Nut Fixing Cable

Outlet

Fixing Plate

Fixing Plate

2. Filter Cleaning 1) Connect feed tube to the inlet of feed valve and filter. 2) Clean the main valve and feed valve with water for at least one minute until clean water comes out.

Hot Water Cold Water

Filter Inlet

Feed Valve

Filter Water

- 21 -

HOW TO INSTALL REFRIGERATOR
I Install Water Filter (Applicable to some models only) I 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.
Control box

Aligning with the guide line and the fastening indication line

Control box

Aligning with the guide line and the loosening indication line

I 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 safe 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.

I 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 droppings on the shelf under the filter.

Substitute cap Separation of red cap Adhesion sticker

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.

- 22 -

HOW TO INSTALL REFRIGERATOR
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 bank 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 hurt hands.) · Check the operation of motor with its operation noise.

2

1

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) and 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 spilt water and throw away 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 fig. The optimum amount of water is 110cc)

Confirm the amount of water

Ice maker

Test Switch Too much Optimum level Too little

* It is acceptable if the adjusted level of water is a bit smaller than optimum level.

- 23 -

HOW TO INSTALL REFRIGERATOR
3-2. Control the amount of water supplied to the icemaker.
Caution : · Please unplug the power cord from the wall outlet and wait for more than three minutes before disconnecting PWB cover as 310V is applied in the control panel. 1. Disconnect PWB cover from the upper part of the refrigerator. (+) Driver Caution : When adjusting the amount of water supplied, adjust step by step. Otherwise the water may spill over.

Switch ON Switch OFF

ON

1

2

3

3. When adjustment of control switch for the amount of water supplied is complete, check the level of water in the ice tray. Confirm the amount of water

2. Adjust the amount of water supplied by using DIP switch. I Water Supplying Time Control Option SWITCH NO S/W1 OFF ON OFF ON OFF ON OFF ON S/W2 OFF OFF ON ON OFF OFF ON ON S/W3 OFF OFF OFF OFF ON ON ON ON Water Suppling Time 6.5 Sec. 5.5 Sec. 6 Sec. 7 Sec. 7.5 Sec. 8 Sec. 9 Sec. 10 Sec.

Optimum level

1) The water supplying time is set at five seconds when the refrigerator is delivered. 2) The amount of water supplied depends on the setting time and water pressure (city water pressure). 3) If ice cube is too small, increase the water supplying time. This happens when too small water is supplied into the ice tray. 4) If ice cube sticks together, decrease the water supplying time. This happens when too much water is supplied into the ice tray.

- 24 -

MICOM FUNCTION
1. Monitor Panel
1-1. GR-P247, GR-P207, GR-L247, GR-L207 1-2. GR-C247, GR-C207, GR-B247, GR-B207

FRZ TEMP REF TEMP DISPENSER

MIN

MAX

LOCK

TEMP ON OFF ROOM TEMP
WATER CRUSHED CUBED

LOCK SUPER FRZ

FRZ TEMP

MIN

MAX

LOCK

TEMP ROOM TEMP ON OFF

LOCK

MIN

MAX

TEMP

REF TEMP

MIN

MAX

TEMP

SUPER FRZ

Dispenser selection button. Super freezer. Temperature adjustment button for refrigerator compartment. Lock button. Temperature adjustment button for freezer compartment.

Temperature adjustment button for refrigerator compartment. Temperature adjustment button for freezer compartment.

Super freezer.

Lock button.

2. Description of Function
2-1-1. Funnction of Temperature Selection Division Power Initially On
FRZ TEMP
MIN MAX

1st Press
FRZ TEMP
MIN MAX

2st Press
FRZ TEMP
MIN MAX

3th Press
FRZ TEMP
MIN MAX

4th Press
FRZ TEMP
MIN MAX

Setting temperature
REF TEMP
MIN MAX

REF TEMP
MIN MAX

REF TEMP
MIN MAX

REF TEMP
MIN MAX

REF TEMP
MIN MAX

Temperature Control Freezer Control Refrigeration Control

Medium -19 °C 3 °C

Medium Max -22 °C 2 °C

Max -23 °C 0°C

Min -15 °C 6 °C

Medium Min -17 °C 4 °C

* The temperature can vary ±3 °C depending on the load condition.

Whenever pressing button, setting is repeated in the order of (Medium) (Medium Max) (Max) (Min) (Medium Min). · The actual inner temperature varies depending on the food status, as the indicated setting temperature is a target temperature, not actual temperature within refrigerator. · Refrigeration function is weak in the initial time. Please adjust temperature as above after using refrigerator for minimum 2~3 days.

- 25 -

MICOM FUNCTION
2-1-2. LCD Back Light Control 1. In order to easily view display status on the LCD, LCD Back Light is turned on for a minute in application of initial power, for a minute in button manipulation and for a minute after closing time from opening time of door. 2. If pressing any display button once with the backlight turned off, buzzer rings and button function is not performed but only backlight is turned on (If pressing the first button with the back light turned off, only back light ON function is performed). 3. If pressing the special freezing button and the freezing temperature adjustment button for more than a second, the back light is turned on and all the graphics of LCD are turned on. If releasing the button, the LCD graphic is displayed in the previous status and the back light is turned off (check LCD graphic and back light ON/OFF status). 2-1-3. Outside temperature display function 1. Outside temperature sensor at the left U of refrigerator senses ambient temperature and displays the outside temperature in the left side of "Outside temperature" text on the LCD of the display part. 2. Ambient temperature is displayed up to -9°C ~ 49°C and displayed as "Lo" for less than -10°C and as "HI" for more than 50°C. If the ambient temperature sensor fails, it is displayed as "Er". 3. Since display temperature of outside temperature is temperature sensed by the ambient sensor in the hinge U of the freezing room, it may differ from the outside temperature display of other household electrical appliances. 2-1-4. Lock function (display button lock) 1. In power application of refrigerator, the only "Release" text is turned on at the right side of lock graphic of LCD with the lock release status. 2. If desiring to lock the display status and pressing the lock/release button once, "Release" text is turned off at the right side of lock graphic of LCD and "Lock" text is turned on with lock status. 3. The only buzzer sound rings and function is not performed even if pressing display button other than lock/release key in the lock status. 4. If desiring to release the lock status and pressing the lock/release button once, "Lock" text is turned off at the right side of lock graphic of LCD and "Release" text is turned on with lock release status.

2-2. Dispenser use selection
You can select water or ice. Please select water, slice ice and square ice by pressing DISPENSER button as you desire. Please press the push button lightly by catching and pushing in cup. · The border line is indicated for the selected function. · "Tak!" sounds if 5 seconds pass after ice comes out. It is sound that the outlet of ice is closed. REFERENCE : Please wait for 2-3 seconds in order to take final ice slices or drops of water when taking out cup from the pressing switches after taking ice or water.

DISPENSER

WATER

CRUSHED

CUBED

Pressing Switch
MAX MIN MAX MIN

2-3. Automatic ice maker
· The automatic ice maker can automatically make 8 pieces of ice cube at a time, 80 pieces a day. But these quantities may be varied according to various conditions including how many times the refrigerator door opens and closes. · Ice making stops when the ice storage bin is full. · If you don't want to use automatic ice-maker, change the ice-maker switch to ON-OFF. If you want to use automatic ice-maker again, change the switch to OFF-ON. NOTE : It is normal that a noise is produced when ice made is dropped into the ice storage bin.

- 26 -

MICOM FUNCTION
2-4. When ice maker does not operate smoothly
Ice is lumped together · When ice is lumped together, take the ice lumps out of the ice storage bin, break them into small pieces, and then place them into the ice storage bin again. · When the ice maker produces too small or lumped together ice, the amount of water supplied to the ice maker need to adjusted. Contact the service center. If ice is not used frequently, it may lump together. Power failure · Ice may drop into the freezer compartment. Take the ice storage bin out and discard all the ice then dry it and place it back. After the machine is powered again, crushed ice will be automatically selected. The unit is newly installed · It takes about 12 hours for a newly installed refrigerator to make ice in the freezer compartment.

2-5. Super freezer
Please select this function for prompt freezer. · "On" or "Off" is repeated whenever pressing SUPER FRZ button. · The arrow mark graphic remains at the On status after flickering 4 times when selecting Special Refrigeration "On". · Super freezer function automatically turns off if a fixed time passes.

ON OFF

SUPER FRZ

ON OFF

Ex) In selecting Ex) In selecting "On" "Off"

2-6. Lock
LOCK

This button stops operation of different button. · Locking or Release is repeated whenever pressing the LOCK . · Pressing the other button when selecting `LOCK', the button does not operate.

LOCK

LOCK

2-7. Special freezing

Ex) In selecting Ex) In selecting "LOCK" "LOCK" again

1. Special freezing is function to improve cooling speed of the freezing room by consecutively operating compressors and freezing room fan. If pressing the special freezing button, "Turn Off" text of the LCD panel is turned off and "Turn On" is immediately turned on and "Arrow ( )" graphic is turned on after flickering once. 2. Special freezing is cycled in order of Selection/ Release ("Turn On" / "Turn Off") whenever pressing the selection button. 3. Special freezing is released if power failure occurs and then returns to the original status. 4. Temperature setting is not changed even if selecting the special freezing. 5. The change of temperature setting at the freezing room or the cold storage room is allowed with special freezing selected and processed. 6. The cold storage room operates the status currently set with special freezing selected and processed. 7. If selecting the special freezing, the special freezing function is released after continuously operating compressor and freezing room fan. 8. If frost removal starting time is arrived during special freezing, special freezing operation is done only for the remaining time after completion of frost removal when the special freezing operation time passes 90 minutes. If passing 90 minutes, special freezing operation is done only for 2 hours after completion of frost removal. 9. If pressing special freezing button during frost removal, the special freezing LCD is turned on but if pressing the special freezing, compressor operates after the remaining time has passed. 10. If selecting special freezing within 7 minutes (delay for 7 minutes of compressor) after the compressor stops, compressor operates after the remaining time has passed. 11. The freezing room fan motor operates at the high speed of RPM during operation of special freezing.

- 27 -

MICOM FUNCTION
2-8. Control of variable type of freezing room fan
1. To increase cooling speed and load response speed, MICOM variably controls freezing room fan motor at the high speed of RPM and standard RPM. 2. MICOM only operates in the input of initial power or special freezing operation or load response operation for the high speed of RPM and operates in the standard RPM in other general operation. 3. If opening doors of freezing / cold storage room or home bar while fan motor in the freezing room operates, the freezing room fan motor normally operates (If being operated in the high speed of RPM, it converts operation to the standard RPM). However, if opening doors of freezing room or home bar, the freezing room fan motor stops. 4. As for monitoring of BLDC fan motor error in the freezing room, MICOM immediately stops the fan motor by determining that the BLDC fan motor is locked or poor if there would be position signal for more than 65 seconds at the BLDC motor. Then it displays failure (refer to failure diagnosis function table) at the display part of refrigerator, performs re-operation in the cycle of 30 minutes. If normal operation is performed, poor status is released and refrigerator returns to the initial status (reset).

2-9. Control of M/C room fan motor
1. The M/C room fan motor performs ON/OFF control by linking with the COMP. 2. It controls at the single RPM without varying RPM. 3. Failure sensing method is same as in fan motor of freezing fan motor (refer to failure diagnosis function table for failure display).

2-10. Door opening alarm
1. Buzzer generates alarm sound if doors are not closed even when more than a minute consecutively has passed with doors of freezing / cold storage room or home bar opened. 2. Buzzer rings three times in the interval of 0.5 second after the first one-minute has passed after doors are opened and then repeats three times of On/Off alarm in the cycle of every 30 seconds. 3. If all the doors of freezing / cold storage room or home bar are closed during door open alarm, alarm is immediately released.

Doors of freezing / cold storage room Closing Opening Closing or home bar

Opening 3 Times 3 Times 3 Times 3 Times

Closing

BUZZER Within a minute A minute 30 30 30 seconds seconds seconds

2-11. Ringing of button selection buzzer
1. If pressing the front display button, "Ding ~ " sound rings.

2-12. Ringing of compulsory operation, compulsory frost removal buzzer
1. If pressing the test button in the main PCB, "Phi ~ " sound rings. 2. In selecting compulsory operation, alarm sound is repeated and completed in the cycle of On for 0.2 second and Off for 1.8 second three times. 3. In selecting compulsory frost removal, alarm sound is repeated and completed in the cycle of On for 0.2 second , Off for 0.2 second, On for 0.2 second and Off for 1.4 second three times.

- 28 -

MICOM FUNCTION
2-13. Frost removal function
1. Frost removal is performed whenever total operation time of compressor becomes 7 ~ 7.5 hour. 2. In providing initial power (or returning power failure), frost removal starts whenever total operation time of compressor becomes 4 ~ 4.5 hour. 3. Frost removal is completed if temperature of a frost removal sensor becomes more than 5°C after starting frost removal. Poor frost removal is not displaced if it does not arrive at 5°C even if two hours have passed after starting frost removal. 4. No removal is done if frost removal sensor becomes poor (snapping or short-circuit).

2-14. Sequential operation of built-in product
Built-in products such as compressor, frost removal heater, freezing room fan, Cooling Fan and step motor damper are sequentially operated as follows for preventing noise and part damage occurred due to simultaneous operation of a lot of parts in applying initial power and completing test. Function When temperature of a frost removal sensor becomes more than 45°C (In purchase, movement) In applying Initial power TEST MODE When temperature of a frost removal sensor becomes less than 45°C (In power failure, service) Load Operation Sequence Remark If error occurs during operation, initial operation is not done.

0.5 POWER sec.

COMP ON

0.3 sec.

ON

F-FAN & C-FAN ON

0.3 0.3 STEP sec. MOTOR sec.

DAMPER ON

HOME BAR HEATER ON

0.5 8 5 HOME FROST FROST 0.3 HOME POWER sec. sec. sec. sec. BAR BAR REMOVAL REMOVAL HEATER HEATER HEATER HEATER ON ON OFF ON OFF

5.6 sec.

WATER SUPPLY & DISPENSE HEATER ON

5 sec.

COMP ON

0.3 sec.

F-FAN & C-FAN ON

Test mode 1 (Compulsory function)

TEST S/W (Press Once)

0.3 OTHER sec.

COMP ON

LOAD OFF

0.3 sec.

F-FAN & C-FAN ON

0.3 STEP sec. MOTOR

DAMPER OPEN

Test mode 2 (Compulsory frost removal)

TEST S/W (Press 2 times)

COMP OFF

0.3 sec.

F-FAN & C-FAN OFF

0.3 FROST 0.3 STEP sec. REMOVAL sec. MOTOR

HEATER ON

DAMPER CLOSE

If pressing switch once more in the test mode 2 or temperature of a frost removal sensor is more than 5°C, it immediately returns to the test mode for initial operation (COMP operates after 7 minutes).

- 29 -

MICOM FUNCTION
2-15. Failure Diagnosis Function
1. Failure diagnosis function is function to facilitate service when nonconforming matters affecting performance of product during use of product. 2. In occurrence of failure, pressing the function adjustment button does not perform function and only alarm sound ("Ding~") rings. 3. If nonconforming matters occurred are released during display of failure code, MICOM returns to the original state (Reset). 4. Failure code is displayed on the display part of setting temperature for the freezing room and the display part of setting temperature for the cold storage room of LCD, which are placed at the display part of a refrigerator. All the LCD graphics other than a failure code are turned off. High quality type (GR-P207, L207, P247, L247) Failure Code display Part
MIN MAX

A

B

Basic type GR-C247, B247, C207, B207)
MIN MAX

TEMP

C
MIN MAX

TEMP

OFF ROOM TEMP

Failure Code display Part

TEMP ROOM TEMP

C
MIN MAX

WATER

CRUSHED

CUBED

TEMP

OFF

E

D

A

B G : Normal Operation

Failure code display part No. Setting Setting Contents of failure temperature temperature for for freezing cold storage Er FS Snapping or short-circuit of Failure of freezer freezer sensor sensor Failure of refrigerator sensor 1 Failure of refrigerator sensor 2 Failure of frost removal sensor Poor of frost removal Er RS Snapping or short-circuit of refrigerator sensor 1 Snapping or short-circuit of refrigerator sensor 2 Snapping or short-circuit of frost removal sensor Snapping of frost removal heater or temperature fuse, pull-out of connector (indicated minimum 4 hours after failure occurs) Poor motor, hooking of wires to fan. Contact of structures to Fan. Snapping or short-circuit of L/wire (if there is no fan motor signal for more than 60 seconds in operation of fan motor Connection between main PCB and display PCB. Snapping or short-circuit of L/wire. Transmission between main PCB and display PCB. Poor TR and receiving part. Snapping or short-circuit of outside temperature perceiving sensor Snapping or short-circuit of icemaking sensor Poor motor or Hall IC within ice-maker unit. Snapping or short-circuit of L/Wire. Poor main PCB drive circuit. Item Compressor

Product operation status in failure Freezer Fan M/C room Fan G G G G G Defrost Heater G G G No frost removal G Stepping motor damper G Open for 10munutes, closing for 15 minutes G G G

1 2 3 4 5

ON for 15minutes Standard OFF for 15minutes RPM G G G G Standard RPM Standard RPM Standard RPM Standard RPM

Setting temperature display (Note 2) Er Er DS dH

6 7

Failure of BLDC FAN at freezing room Failure of BLDC FAN at machine room Failure of Communication

Er Er

FF CF

G G G

OFF (check every 30 minutes)

G

G G G

G G G

Standard OFF (check every 30 minutes) RPM Standard RPM G

8

Er

CO

9 10 11

Failure of Outside Sensor Failure of ice removal sensor Failure of ice maker unit

Setting temperature display (Note 1) Setting temperature display (Note 2) Setting temperature display (Note 2)

G G G

G G G

G G G

G G G

G G G

In display of the failure mode, all LCDs of setting temperature for freezing/ setting temperature for cold storage are turned off (excluding Note1 and Note2).

- 30 -

MICOM FUNCTION
Note1) In error of outside sensor, setting temperature for freezing/ cold storage is normally displayed and indicated "Er" on the outside temperature display part (normally displayed except for the outside temperature display part). Note2) Nonconforming contents of poor R2 sensor, ice-making sensor and ice-making kit are displayed in LCD check, not indicated on the failure display part (when pressing freezing temperature adjustment button and special freezing button for a second or more). Cold storage sensor 2 (middle partition) Ice-making sensor ICE Maker Unit Normal : (C) Part LCD graphic- ON Abnormal: Only (C) Part LCD graphic-OFF Normal: (D) Part LCD graphic-ON Abnormal: Only (D) Part LCD graphic-ON Normal: (E) Part LCD graphic-ON Abnormal : Only (E) Part LCD graphic-ON Other LCD graphics - ON

2-16. Test Function
1. The purpose of test function is to check function of the PWB and product and to search for the failure part at the failure status. 2. Test button is placed on the main PCB of refrigerator (test switch), and the test mode will be finished after maximum 2 hours irrespective of test mode and then is reset to the normal status. 3. Function adjustment button is not perceived during performance of test mode but only warning sounds ring. 4. In finishing test mode, always pull the power cord out and then plug-in it again for the normal state. 5. If nonconforming contents such as sensor failure are found during performance of test mode, release the test mode and display the failure code. 6. Even if pressing the test button during failure code display, test mode will not be performed. Mode Test 1 Manipulation Press test button once (freezing force mode) Content 1. Continuous operation of compressor 2. Continuous operation of freezing room fan (high speed RPM) and M/C room fan 3. Frost removal heater OFF 4. Full opening status (baffle opened) status of electronic step motor damper 5. All display LCD graphics - ON. 1. Compressor OFF 2. Freezing room fan and M/C room fan is turned off. 3. Frost removal heater ON 4. Full closing status (baffle closed) status of electronic step motor damper 5. All display LCD graphics - OFF ( (A) "Medium" status. (B) "Medium" status. Only LCD is turned on) Return to the initial status. Compressor is operated after 7 minutes. Remarks Freezing room fan is turned off in door open.

Test 2

Press test button once at the test mode 1 status (compulsory frost removal mode)

Normal Status

Press test button once at the test mode 2 status (freezing force mode)

- 31 -

MICOM FUNCTION
LCD check function: If simultaneously pressing special freezing button and cold temperature adjustment button for a second, a back light is turned on and all display LCD graphics on. If releasing the button, the LCD graphic displays the previous status, the back light is turned off (LCD graphic and back light ON/OFF check).


FRZ TEMP
MIN MAX

LOCK

TEMP ROOM TEMP ON OFF

LOCK

FRZ TEMP REF TEMP

MIN

MAX

LOCK

TEMP ON OFF ROOM TEMP
WATER CRUSHED CUBED

LOCK SUPER FRZ

MIN

MAX

TEMP

REF TEMP

MIN

MAX

TEMP

SUPER FRZ

DISPENSER


FRZ TEMP
MIN MAX

LOCK

FRZ TEMP REF TEMP

MIN

MAX

LOCK SUPER FRZ

MIN

MAX

REF TEMP

MIN

MAX

SUPER FRZ

DISPENSER

2-17. Function of dispenser and water dispenser built-in
1. This is function allowing ice and water to come outside without opening door. 2. If pressing the dispenser switch (rubber button) after selecting ice (cube ice, crushed ice) or water, ice and water equivalent to each come out. However, the duct doors are opened by electrical solenoid valve (Duct Door Solenoid) if pressing the press switch in case of selecting ICE. If pressing the dispenser press switch and then detaching the hands, the duct door is closed after it is opened for 5 seconds. 3. Function allowing ice and water to come stops if freezing room doors are opened. 4. If there is no Off signal even when 3 minutes have passed while pressing the dispenser press switch after selecting ice (cube ice, crushed ice) or water, geared motor and solenoid (Cube, Water) is automatically turned off. However, the solenoid (duct door) is stop 5 seconds after Off (to prevent short-circuit of a coil due to overheat of solenoid). 5. Dispenser Lamp On/Off function Lamp on the dispenser part is turned on if pressing the dispenser press switch after selecting ice (cube ice, crushed ice) or water. If detaching the hands, it is turned off. 6. Selection function of water/crushed/ cube ice 1) This is function to allow selection of water/crushed/ cube ice function depending on user's selection. Display and selection is done if pressing the dispenser selection button. 2) In the initial Power On, cube ice is automatically selected. 3) In selecting cube ice, geared motor is operated so that crushed ice can be supplied outside if pressing the press switch when ice is formed in the ice storage container (Bank, Ice). 4) In selecting cube ice, geared motor is operated so that cube ice can be supplied outside if pressing the press switch when ice is formed in the ice storage container (Bank, Ice). 7. Water dispenser function 1) LCD is displayed for selection if user selects water at the function adjustment part. 2) Water dispenser function is a type directly connected to a water pipe. The water solenoid valve built-in at the right side of the M/C room is opened so that water can be supplied if selecting Water from the function adjustment part and then pressing the press switch.

- 32 -

EXPLATION FOR MICOM CIRCUIT
1. Explanation for PWB circuit
1-1. Power circuit
1. GR-P247, L247, C247, B247 / P207, L207, C207, B207 Power circuit consists of SMPS (SWITCHING MODE POWER SUPPLY) power. The SMPS consist of the rectifying part (BD1, CE1) converting AC voltage to DC voltage, the switching part (IC2) switching the converted DC voltage, transformer transferring energy of the primary side of the switching terminal to the secondary side and the feedback part (IC3, IC4) transferring it to the primary side. Caution : Since high voltage (DC310V) is maintained at the power terminal, please take a measure after more than 3 minutes have passed after removing power cords in the abnormal operation of a circuit. Voltage of every part is as follows:

Part Voltage

VA1 230 Vac

CE1 310 Vdc

CE2 16 Vdc

CE3 12 Vdc

CE4 15.5 Vdc

CE5 5 Vdc

- 33 -

EXPLATION FOR MICOM CIRCUIT
1-2. Oscillation circuit
Oscillation circuit is a circuit with the purpose of generating basic time for clock occurrence for synchronization and time calculation in relation with information transmission/reception of inside elements of IC1 (MICOM). The OSC1 must always use rated parts since if SPEC is changed, time calculated at the IC1 may be changed or no operation is done.

1-3. Reset circuit
The reset circuit is circuit allowing various parts such as RAM inside of MICOM (IC1) to initialize and the whole of function to start from the initial status, when initial power is input or when power is applied again to MICOM by a spontaneous power failure. `LOW' voltage is applied to the reset terminal of MICOM in the beginning of power supply for a constant time (10ms). Reset terminal during general operation is 5V (No MICOM operates in failure of RESET IC).

- 34 -

EXPLATION FOR MICOM CIRCUIT
1-4. Load/dispenser operation, door opening circuit
1. LOAD DRIVING CIRCUIT In even if opening the door of freezing room or cold storage room during operation of fan motor at the freezing room, this circuit does not stop and operates at the standard RPM. In addition, if doors of freezing room or cold storage room, the fan motor normally operates at the RPM previously operated. (A), (B), (C) and (D) of door switch for the freezing room or cold storage room are connected to the door open sensing circuit in parallel toward both ends of switch to determine door open at MICOM. Since a door switch of the home bar is connected to door switch (C), (D) of the cold storage room, it senses door opening if even one of both is opened. The fan motor is immediately stop if opening doors of the freezing room or cold storage room at the TEST mode and it immediately operates if closing them. 1) GR-P247, L247, P207, L207

Type of Load

COMP

Frost Removal Heater IC6-15

AC Converting Relay IC6-14 Within 1 V 12 V

R-room LAMP

Water Tank Heater IC7-15

Measuring part (IC6) Status ON OFF

IC6-16

IC7-13

- 35 -

EXPLATION FOR MICOM CIRCUIT
2) GR-C247, B247, C207, B207 The fan motor at the freezing room does not stop but operates if opening doors of the freezing room or cold storage room or the home bar during operation of the fan motor at the freezing room. (A), (B), (C) and (D) of door switch for the freezing room or cold storage room are connected to the door open sensing circuit toward both ends of switch to determine door open at MICOM. Since a door switch of the home bar is connected to door switch (C), (D) of the cold storage room, it senses door opening if even one of both is opened.

Type of Load

COMP

Frost Removal Heater No.11

AC Converting Relay No.12 Within 1 V 12 V

R-room LAMP

Home Bar Heater No.16

Measuring part (IC7) Status ON OFF

No.10

No.14

- 36 -

EXPLATION FOR MICOM CIRCUIT
2. Dispenser operation circuit

1) Check load driving status WATER VALVE ICE IC6-11 WATER IC6-10 Within 1 V 12 V

Type of Load

GEARED MOTOR IC6-13

SOLENOID CUBE IC6-12

SOLENOID DISPENSER IC7-12

HOME BAR HEATER IC7-10

SOLENOID PILOT IC7-16

Measuring part Status ON OFF

2) Lever S/W sensing circuit Measuring part Lever S/W On(Press) OFF 5V 0V 5V IC1(Micom) (No. 16) (60 Hz)

- 37 -

EXPLATION FOR MICOM CIRCUIT
3. Door opening sensing circuit 1) GR-P247, L247, P207, L207

(Freezing room)

(Cold storage room) (Cold storage room)

2) GR-C247, B247, C207, B207, 197

(Freezing room)

(Cold storage room) (Cold storage room)

Measuring part IC1 (MICOM) No. 47, 46 Pin Door of Freezing/Cold Storage Room Closing Opening 5 V ( A - B , C - D . S/W at both ends are at Off status) 5 V ( A - B , C - D . S/W at both ends are at On status)

Since door switch sensing switch (A), (B) are a separate switch even if the door switch of the freezing room normally operates, they may fail to sense door opening in the failure of switch at both ends of (A) and (B) or in failure of the L/wire. Lamp does at the cold storage room not turn on if the door switch of the cold storage room fails to sense the door open switch (C), (D) or the home bar switch.

- 38 -

EXPLATION FOR MICOM CIRCUIT
1-5. Temperature sensing circuit
1) GR-P247, L247, P207, L207

A

(Sensor for freezing room) (Sensor for frost removal)

C

B
(Sensor for cold storage room) (Sensor for cold storage room)

D

E

F

The above circuits are circuits attached to freezing room sensor or cold storage room sensor for adjusting setting temperature at the freezing room and cold storage room, ice-making sensor for sensing water temperature in ice-making, or an evaporator for sensing temperature of a frost removal sensor necessary for frost removal. Short or open status of every temperature sensor is as follows: SENSOR Freezing sensor Frost removal sensor Cold storage sensor 1 Cold storage sensor 2 Ice-making sensor Room temperature sensor CHECK POINT POINT A Voltage POINT B Voltage POINT C Voltage POINT D Voltage POINT E Voltage POINT F Voltage 0.5 V~4.5 V 0V 5V NORMAL(-30 °C ~ 50 °C) IN SHORT IN OPEN

- 39 -

EXPLATION FOR MICOM CIRCUIT
2) GR-C247, B247, C207, B207

A

(Sensor for freezing room)

(Sensor for frost removal)

C

B

(Sensor for cold storage room)

(Sensor for cold storage room)

D

E

The above circuits are circuits attached to freezing room sensor or cold storage room sensor for adjusting setting temperature at the freezing room and cold storage room, ice-making sensor for sensing water temperature in ice-making, or an evaporator for sensing temperature of a frost removal sensor necessary for frost removal. Short or open status of every temperature sensor is as follows: SENSOR Freezing sensor Frost removal sensor Cold storage sensor 1 Cold storage sensor 2 Room temperature sensor CHECK POINT POINT A Voltage POINT B Voltage POINT C Voltage POINT D Voltage POINT E Voltage 0.5 V~4.5 V 0V 5V NORMAL(-30 °C ~ 50 °C) IN SHORT IN OPEN

- 40 -

EXPLATION FOR MICOM CIRCUIT
1-6. Switch entry circuit
The following circuits are entry circuits for sensing signal form test S/W, electronic single motor damper reed S/W for examining refrigerator. 1) GR-P247, L247, P207, L207 2) GR-C247, B247, C207, B207

1-7. Option designation circuit (model separation function)
1) GR-P247, L247, P207, L207

2) GR-C247, B247, C207, B207
R21 4.7K 36

The above circuits are used for designating separation by model as option and notifying it to MICOM. Designation of option by model and the application standards are as follows: u These circuits are accurately pre-adjusted in shipment from factory and so you must not additionally add or remove option. Separation OP1 OUT Domestic model Connection Status Connection Application Standard Export model

- 41 -

EXPLATION FOR MICOM CIRCUIT
1-8. Stepping motor operation circuit

TA7774F

For motor driving method, rotation magnetism is formed at coils wound on each phase of motor and stator and so motor becomes to rotate if applying "High" signal to the IC8 (TA777AF) at the MICOM PIN 33 and outputting "High", "Low" signal by step numbers fixed through MICOM PIN 34 and 35,. Explanation) For driving method of the stepping motor, send signals in the cycle of 3.33 mSEC using terminal of MICOM PIN 33, 34 and 35 as shown in wave form of the following part. These signals are output to the output terminal (No.10, 11, 14, 15) via the input terminal (No. 3, 6, 8) of the IC10 (TA7774F) as IC for motor driving. Output signals allow motor coils wound on each phase of stator to form rotation magnetic field and the motor to rotate. Inputting as below figure to the input terminal (INA, INB) as IC (TA7774AF) for motor driving allows motor coils wound on each phase of stator to form rotation magnetic field and the stepping motor damper to rotate

CCW (Reverse rotation)

(Positive rotation) CW

INA INB A B A

B

- 42 -

EXPLATION FOR MICOM CIRCUIT
1-9. Fan motor driving circuit (freezing room, M/C room)
1. This circuit performs function to make standby power `0' by cutting off power supplied to ICs inside of the fan motor in the fan motor OFF. 2. This is a circuit to perform a temporary change of speed for the fan motor and applies DC voltage up to 7.5V ~ 16V to motor. 3. This circuit performs function not to drive the fan motor further by cutting off power applied to the fan motor in the lock of fan motor by sensing the operation RPM of the fan motor. 1) GR-P247, L247, P207, L207 a , d part Motor OFF Motor ON 5V 2 ~ 3V b part 2V or less 12 ~ 14V e part 2V or less 8 ~ 16V c , f part 0V 0V

b

c

a e

f

d

- 43 -

EXPLATION FOR MICOM CIRCUIT
2) GR-C247, B247, C207, B207

b

c
Speed

a e

f
Speed

d

- 44 -

EXPLATION FOR MICOM CIRCUIT
1-10. Temperature compensation and over-cool/weak-cool compensation circuit
1. Temperature compensation at freezing room, cold storage room 1) GR-P247, L247, P207, L207

Temperature compensation at R-room Temperature compensation at F-room

2) GR-C247, B247, C207, B207

Temperature compensation at R-room Temperature compensation at F-room

Freezing room Resistance value (RCF1) 180 k 56 k 33 k 18 k 12 k 10 k 8.2 k 5.6 k 3.3 k 2 k 470 Temperature compensation +5 °C +4 °C +3 °C +2 °C +1 °C 0 °C -1 °C -2 °C -3 °C -4 °C -5 °C

Cold storage room Resistance value (RCR1) 180 k 56 k 33 k 18 k 12 k 10 k 8.2 k 5.6 k 3.3 k 2 k 470 Temperature compensation +2.5 °C +2.0 °C +1.5 °C +1.0 °C +0.5 °C 0 °C -0.5 °C -1.0 °C -1.5 °C -2.0 °C -2.5 °C Coolly compensate Reference temperature Remarks Warmly compensate

u Temperature compensation table by adjustment value (difference value against current temperature) Ex) If changing compensation resistance at a cold storage room (RCR1) from 10 k (current resistance) to 18 k (modified resistance), temperature at the cold storage will increase by +1°C.

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EXPLATION FOR MICOM CIRCUIT
u Temperature compensation table at the cold storage room is as follows: Modification resistance 470 Current resistance 470 2 k 3.3 k 5.6 k Cold storage room (RCR1) 10 k 12 k 18 k 33 k 56 k 180 k 8.2 k No change 0.5 °C Down 1 °C Down 1.5 °C Down 2 °C Down 2.5 °C Down 3 °C Down 3.5 °C Down 4 °C Down 4.5 °C Down 5 °C Down 2 k 0.5 °C Up No change 0.5 °C Down 1 °C Down 1.5 °C Down 2 °C Down 2.5 °C Down 3 °C Down 3.5 °C Down 4 °C Down 4.5 °C Down 3.3 k 1 °C Up 0.5 °C Up No change 0.5 °C Down 1 °C Down 1.5 °C Down 2 °C Down 2.5 °C Down 3 °C Down 3.5 °C Down 4 °C Down 5.6 k 1.5 °C Up 1 °C Up 0.5 °C Up No change 0.5 ° Drop 1 °C Down 1.5 °C Down 2 °C Down 2.5 °C Down 3 °C Down 3.5 °C Down 8.2 k 2 °C Up 1.5 °C Up 1 °C Up 0.5 °C Up 10 k 2.5 °C Up 2 °C Up 1.5 °C Up 1 °C Up 12 k 3 °C Up 2.5 °C Up 2 °C Up 1.5 °C Up 1 °C Up 0.5 °C Up No change 0.5 °C Down 1 °C Down 1.5 °C Down 2 °C Down 18 k 3.5 °C Up 3 °C Up 2.5 °C Up 2 °C Up 1.5 °C Up 1 °C Up 0.5 °C Up No change 0.5 °C Down 1 °C Down 1.5 °C Down 33 k 4 °C Up 3.5 °C Up 3 °C Up 2.5 °C Up 2 °C Up 1.5 °C Up 1 °C Up 0.5 °C Up No change 0.5 °C Down 1 °C Down 56 k 4.5 °C Up 4 °C Up 3.5 °C Up 3 °C Up 2.5 °C Up 2 °C Up 1.5 °C Up 1 °C Up 0.5 °C Up No change 0.5 °C Down 180 k 5 °C Up 4.5 °C Up 4 °C Up 3.5 °C Up 3 °C Up 2.5 °C Up 2 °C Up 1.5 °C Up 1 °C Up 0.5 °C Up No change

No 0.5 °C change Up 0.5 °C Down 1 °C Down 1.5 °C Down 2 °C Down 2.5 °C Down 3 °C Down No change 0.5 °C Down 1 °C Down 1.5 °C Down 2 °C Down 2.5 °C Down

u Temperature compensation at the freezing room is also performed in the same manner as cold storage room. Temperature compensation value is equivalent to two times the cold storage room. u This circuit is a circuit to enter the necessary level of temperature compensation for adjusting different temperature every model at the cold storage room into MICOM.

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EXPLATION FOR MICOM CIRCUIT
2. Compensation circuit for weak-cold, over-cold at freezing room 1) GR-P247, L247, P207, L207 2) GR-C247, B247, C207, B207

Temperature compensation in CUT JCR1 JCR2 JCR3 JCR4 +1 °C +1 °C -1 °C -1 °C +2 °C -2 °C

Compensation for weak-cold JCR3 JCR4

Compensation for over-cold JCR1 JCR2

Temperature compensation value at cold storage room 0 °C (In shipment from factory)

Remarks

CUT CUT CUT CUT CUT CUT CUT CUT CUT CUT CUT CUT CUT CUT CUT CUT CUT CUT CUT CUT CUT CUT CUT CUT CUT CUT

-1 °C -1 °C +1 °C +1 °C -2 °C +2 °C 0 °C 0 °C 0 °C 0 °C -1 °C +1 °C 0 °C

u The above option circuit is a circuit to compensate for temperature at the cold storage room by simply cutting in service.

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EXPLATION FOR MICOM CIRCUIT
1-11. Communication circuit and connection L/Wire between main PCB and display PCB
The following circuit is a communication circuit used for exchanging the necessary information between main MICOM of main PCB and LCD dedicated MICOM for LCD control of display PCB. Transmission/receipt L/Wire together with the necessary display PCB for driving the display PCB is required. Poor communication occurs if a continuous information exchange fail to continue for more than 2 minutes between main MICOM of main PCB and LCD dedicated MICOM for LCD control of display PCB.

Main PCB

L/Wire FD/H(4-wires)
DC 12V

Display PCB

Main MICOM

LCD dedicated MICOM

GND

Transmission (error status)

Reception (notch status)

1) GR-P247, L247, P207, L207

12Vdc

Reception

Transmission

GND
Transmission

Reception

FRZ TEMP REF TEMP DISPENSER

MIN

MAX

TEMP

LOCK SUPER FRZ

MIN

MAX

TEMP

OFF ROOM TEMP

WATER

CRUSHED

CUBED

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EXPLATION FOR MICOM CIRCUIT
2) GR-C247, B247, C207, B207

Reception

Transmission

Transmission

Reception

FRZ TEMP

MIN

MAX

TEMP ROOM TEMP

LOCK

REF TEMP

MIN

MAX

TEMP

OFF

SUPER FRZ

2. Sensor resistance characteristics table
Measuring Temperature (°C) -20 °C -15 °C -15 °C -5 °C 0 °C +5 °C +10 °C +15 °C +20 °C +25 °C +30 °C +40 °C +50 °C Freezing Sensor 22.3 k 16.9 k 13.0 k 10.1 k 7.8 k 6.2 k 4.9 k 3.9 k 3.1 k 2.5 k 2.0 k 1.4 k 0.8 k Cold storage sensor 1, 2. Frost removal sensor, Outside sensor 77 k 60 k 47.3 k 38.4 k 30 k 24.1 k 19.5 k 15.9 k 13 k 11 k 8.9 k 6.2 k 4.3 k

u Resistance value allowance of sensor is ±5%. u In measuring resistance value allowance of sensor, perform measuring after leaving the sensor for more than 3 minutes at the measuring temperature (delay is required due to sense speed relation relationship). u Since an analog tester has a large measuring temperature, measuring with a digital tester is required as possible as. u Resistance of the cold storage sensor 1 and 2 shall be measured with a digital tester after separating CON8 of the PWB ASSY and the MAIN part. u Resistance of the freezing sensor shall be measured with a digital tester after separating CON7 of the PWB ASSY and the MAIN part.

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EXPLATION FOR MICOM CIRCUIT
3. PWB parts diagram and list
3-1. PWB Ass'y, main part diagram
1. GR-P247, L247, P207, L207

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EXPLATION FOR MICOM CIRCUIT
2. GR-C247, B247, C207, B207

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EXPLATION FOR MICOM CIRCUIT
3-2. Parts list
1. GR-P247, L247, P207, L207

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EXPLATION FOR MICOM CIRCUIT

WATER SUPPLY S/W

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EXPLATION FOR MICOM CIRCUIT
2. GR-C247, B247, C207, B207

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EXPLATION FOR MICOM CIRCUIT

WATER SUPPLY S/W

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EXPLATION FOR MICOM CIRCUIT
3-3. DISPLAY ASSY part diagram
1. GR-P247, L247, P207, L207

DOUBLE SIDE TAPE SPREAD SHEET

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EXPLATION FOR MICOM CIRCUIT
2. GR-C247, B247, C