LG Electronics GR-P227, GR-P257, GR-L227, GR-L257 User Manual

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Page 1

CAUTION

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

REFRIGERATOR

SERVICE MANUAL

MODEL: GR-P227/L227

COLOR: TITANIUM

http://eic.lgservice.com

GR-P257/L257

Page 2

CONTENTS

WARNINGS AND PRECAUTIONS FOR SAFETY ................................................................................................................ 3

SPECIFICATIONS................................................................................................................................................................... 4

PARTS IDENTIFICATION ....................................................................................................................................................... 6

HOW TO INSTALL THE REFRIGERATOR .......................................................................................................................... 10

HOW TO ADJUST DOOR HEIGHT OF THE REFRIGERATOR ........................................................................................ 10

HOW TO INSTALL WATER PIPE........................................................................................................................................11

HOW TO CONTROL THE AMOUNT OF WATER SUPPLIED TO THE ICEMAKER ......................................................... 15

MICOM FUNCTION .............................................................................................................................................................. 16

EXPLATION FOR MICOM CIRCUIT..................................................................................................................................... 26

EXPLANATION FOR PWB CIRCUIT ..................................................................................................................................26

ICE MAKER AND DISPENSER OPERATION PRINCIPLE AND REPAIR METHOD.......................................................... 41

OPERATION PRINCIPLE ....................................................................................................................................................41

ICEMAKER FUNCTIONS....................................................................................................................................................42

DEFECT DIAGNOSIS FUNCTION......................................................................................................................................43

CIRCUIT................................................................................................................................................................................ 44

TROUBLE DIAGNOSIS........................................................................................................................................................ 45

TROUBLE SHOOTING ...................................................................................................................................................... 45

FAULTS .............................................................................................................................................................................. 55

COOLING CYCLE HEAVY REPAIR ................................................................................................................................... 72

HOW TO DEAL WITH CLAIMS.......................................................................................................................................... 79

HOW TO DISASSEMBLE AND ASSEMBLE....................................................................................................................... 84

DOOR................................................................................................................................................................................. 84

HANDLE ............................................................................................................................................................................. 85

SHROUD, GRILLE FAN ..................................................................................................................................................... 85

WATER VALVE DISASSEMBLY METHOD ........................................................................................................................ 86

FAN AND FAN MOTOR DISASSEMBLY METHOD........................................................................................................... 86

DISPENSER....................................................................................................................................................................... 87

EXPLODED VIEW ................................................................................................................................................................ 89

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Page 3

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.

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.

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.

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.

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Page 4

SPECIFICATIONS

1. Ref No. : GR-P227

ITEMS SPECIFICATIONS

DIMENSIONS (mm) 894(W)X790(D)X1753(H)

NET WEIGHT (kg) 132

COOLING SYSTEM Fan Cooling

TEMPERATURE CONTROL Micom Control

DEFROSTING SYSTEM Full Automatic

Heater Defrost

INSULATION Cyclo-Pentane

COMPRESSOR P.T.C. Starting Type

EVAPORATOR Fin Tube Type

CONDENSER Wire Condenser

REFRIGERANT R134a (180g)

LUBRICATING OIL FREOL @10G (310 cc)

CAPILLARY TUBE ID 0.83

DRIER MOLECULAR SIEVE XH-7

ITEMS SPECIFICATIONS

FIRST DEFROST 4 - 5 Hours

DEFROST CYCLE 13 - 15 Hours

DEFROSTING DEVICE Heater, Sheath

ANTI SWEAT HEATER Dispenser Duct Door Heater

Dispenser Heater

Home Bar Heater

ANTI-FREEZING HEATER Damper Heater

FREEZER LAMP 40W (1 EA)

REFRIGERATOR LAMP 40W (1 EA) / 30W (1 EA)

948

894

602

1753

662

711

790

1135.5

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Page 5

SPECIFICATIONS

2. Ref No. : GR-L227

ITEMS SPECIFICATIONS

DIMENSIONS (mm) 894(W)X790(D)X1753(H)

NET WEIGHT (kg) 132

COOLING SYSTEM Fan Cooling

TEMPERATURE CONTROL Micom Control

DEFROSTING SYSTEM Full Automatic

Heater Defrost

INSULATION Cyclo-Pentane

COMPRESSOR P.T.C. Starting Type

EVAPORATOR Fin Tube Type

CONDENSER Wire Condenser

REFRIGERANT R134a (180g)

LUBRICATING OIL FREOL @10G (310 cc)

CAPILLARY TUBE ID 0.83

ITEMS SPECIFICATIONS

DRIER MOLECULAR SIEVE XH-7

FIRST DEFROST 4 - 5 Hours

DEFROST CYCLE 13 - 15 Hours

DEFROSTING DEVICE Heater, Sheath

ANTI SWEAT HEATER Dispenser Duct Door Heater

Dispenser Heater

ANTI-FREEZING HEATER Damper Heater

FREEZER LAMP 40W (1 EA)

REFRIGERATOR LAMP 40W (1 EA) / 30W (1 EA)

948

894

602

662

1753

711

790

1135.5

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Page 6

SPECIFICATIONS

1. Ref No. : GR-P257

ITEMS SPECIFICATIONS

DIMENSIONS (mm) 894(W)X875(D)X1753(H)

NET WEIGHT (kg) 132

COOLING SYSTEM Fan Cooling

TEMPERATURE CONTROL Micom Control

DEFROSTING SYSTEM Full Automatic

Heater Defrost

INSULATION Cyclo-Pentane

COMPRESSOR P.T.C. Starting Type

EVAPORATOR Fin Tube Type

CONDENSER Wire Condenser

REFRIGERANT R134a (180g)

LUBRICATING OIL FREOL @10G (310 cc)

CAPILLARY TUBE ID 0.83

DRIER MOLECULAR SIEVE XH-7

ITEMS SPECIFICATIONS

FIRST DEFROST 4 - 5 Hours

DEFROST CYCLE 13 - 15 Hours

DEFROSTING DEVICE Heater, Sheath

ANTI SWEAT HEATER Dispenser Duct Door Heater

Dispenser Heater

Home Bar Heater

ANTI-FREEZING HEATER Damper Heater

FREEZER LAMP 40W (1 EA)

REFRIGERATOR LAMP 40W (1 EA) / 30W (1 EA)

948 894

687

1753

747

796

875

1220.5

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Page 7

SPECIFICATIONS

2. Ref No. : GR-L257

ITEMS SPECIFICATIONS

DIMENSIONS (mm) 894(W)X875(D)X1753(H)

NET WEIGHT (kg) 132

COOLING SYSTEM Fan Cooling

TEMPERATURE CONTROL Micom Control

DEFROSTING SYSTEM Full Automatic

Heater Defrost

INSULATION Cyclo-Pentane

COMPRESSOR P.T.C. Starting Type

EVAPORATOR Fin Tube Type

CONDENSER Wire Condenser

REFRIGERANT R134a (180g)

LUBRICATING OIL FREOL @10G (310 cc)

CAPILLARY TUBE ID 0.83

ITEMS SPECIFICATIONS

DRIER MOLECULAR SIEVE XH-7

FIRST DEFROST 4 - 5 Hours

DEFROST CYCLE 13 - 15 Hours

DEFROSTING DEVICE Heater, Sheath

ANTI SWEAT HEATER Dispenser Duct Door Heater

Dispenser Heater

ANTI-FREEZING HEATER Damper Heater

FREEZER LAMP 40W (1 EA)

REFRIGERATOR LAMP 40W (1 EA) / 30W (1 EA)

948 894

687

1753

747

796

875

1220.5

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Page 8

PARTS IDENTIFICATION

1. Ref No. : GR-P227/GR-P257 (INTERNAL FILTER)

Frame Display

Cover PWB

Dispenser Lamp

Ice & Water

Dispenser Button

Home Bar

Automatic Icemaker

Shelf

Lamp

Shelf

Drawer

Door rack

Freezer compartment

Refrigerator compartment

Water Tube

Milk product corner

Lamp

Door Rack

Shelf Can Server Wine holder

(Plastic or wire) Refreshment center(Optional)

Shelf (Folding or Normal)

Egg Box

Vegetable Drawer

(Optional)

Drawer

Door rack

Lower cover

Humidity Switch

Miracle Zone (Optional) Fresh compartment (Optional)

Door Rack

Conversion switch (Meats/Vegetables) (Optional)

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Page 9

PARTS IDENTIFICATION

2. Ref No. : GR-P227/GR-P257 (EXTERNAL FILTER)

Frame Display

Dispenser Lamp

Ice & Water

Dispenser Button

Home Bar

Cover PWB

Automatic Icemaker

Shelf

Lamp

Shelf

Drawer

Door rack

Drawer

Door rack

Lower cover

Freezer compartment

Refrigerator compartment

Milk product corner

Lamp

Door Rack

Shelf Can Server Wine holder

(Plastic or wire) Refreshment center(Optional)

Shelf (Folding or Normal)

Egg Box

Vegetable Drawer

Humidity Switch

Miracle Zone (Optional) Fresh compartment (Optional)

Door Rack

Conversion switch (Meats/Vegetables) (Optional)

(Optional)

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Page 10

PARTS IDENTIFICATION

3. Ref No. : GR-P227/GR-P257 (INTERNAL FILTER)

Frame Display

Cover PWB

Dispenser Lamp

Ice & Water

Dispenser Button

Automatic Icemaker

Shelf

Lamp

Shelf

Drawer

Door rack

Freezer compartment

Refrigerator compartment

Water Tube

Milk product corner

Lamp

Door Rack

Shelf Can Server Wine holder

(Plastic or wire) Refreshment center(Optional)

Shelf (Folding or Normal)

Egg Box

Vegetable Drawer

(Optional)

Drawer

Door rack

Lower cover

Humidity Switch

Miracle Zone (Optional) Fresh compartment (Optional)

Door Rack

Conversion switch (Meats/Vegetables) (Optional)

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Page 11

PARTS IDENTIFICATION

4. Ref No. : GR-P227/GR-P257 (EXTERNAL FILTER)

Frame Display

Dispenser Lamp

Ice & Water

Dispenser Button

Cover PWB

Automatic Icemaker

Shelf

Lamp

Shelf

Drawer

Door rack

Drawer

Door rack

Lower cover

Freezer compartment

Refrigerator compartment

Milk product corner

Lamp

Door Rack

Shelf Can Server Wine holder

(Plastic or wire) Refreshment center(Optional)

Shelf (Folding or Normal)

Egg Box

Vegetable Drawer

Humidity Switch

Miracle Zone (Optional) Fresh compartment (Optional)

Door Rack

Conversion switch (Meats/Vegetables) (Optional)

(Optional)

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Page 12

HOW TO INSTALL REFRIGERATOR

Adjusting Screw

Driver

Height

Difference

Height Difference

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.

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

Page 13

HOW TO INSTALL REFRIGERATOR

Valve Feed Rubber, Packing Connector, Pipe

Tape, TeflonConnector, Pipe

2. How to Install Water Pipe

■ Before Installation

1. The icemaker requires the water pressure of 1.5 -

8.5kgf/cm 180cc with water for 3 seconds)

2. Install booster pump where the city water pressure is below 1.5kgf/cm 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.

Class. Shape and Spec. Nomenclature P/No Remarks

Conve-

. (It is acceptable if city water fills a cup of

for normal operation of water and ice

Valve Feed 5221JA3001A Common Use

2-1. When connecting directly to the water tap.

■ Please confirm the following installation parts.

rtible Water Valve

Water Connector

Connector, (MECH) Pipe 4932JA3003B

Connector, (MECH) Pipe 4932JA3003A Conversion Connector(3/4") 6631JA3004A

No Holes

Balance Conector(3/4") 6631JA3004B Packing(ø24x3t) 3920JA3001B

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

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Page 14

HOW TO INSTALL REFRIGERATOR

Single Lever Type Faucet (general)

Feed

Valve

General Type

Feed

Valve

Two Hands Type Faucet Single Lever Type Faucet (one

hole, tech type and hand spray)

Feed

Valve

Feed

Valve

Pipe Connector B

Hot Water

Pipe Connector A

Feed

Valve

Cold Water

How to wind

Sealing Tapes.

Water Tube

Nut

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.

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.

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Page 15

HOW TO INSTALL REFRIGERATOR

Water Tube

Nut

Inlet

Outlet

Connector Type Nut Type

Water

Filter

Filter Inlet

Feed Valve

Hot Water

Cold Water

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.

■ Outternal Filter

1. Filter Fixation

1) There are two types of filter. One is nut type and the other is connector type.

2) Connect feed tube to the filter outlet and water valve connecting tube.

3) 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 8m when locating filter.

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.

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Page 16

Control box

Aligning with the guide line and the fastening indication line

Aligning with the guide line and the loosening indication line

Control box

Separation of red cap

Adhesion sticker

Substitute cap

HOW TO INSTALL REFRIGERATOR

■ Install Water Filter (Applicable to some models only)

■ 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.

■ After installing water filter

Reassemble the lamp cover and the top shelf of the refrigerator. To place the top shelf of the refrigerator, raise

■ 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.

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.

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.

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Page 17

HOW TO INSTALL REFRIGERATOR

Water Amount Indicator Light

Water Amount Selection Button

Power Switch

Feeler Arm

3. How to Control the Amount of Water Supplied to Icemaker.

3-1. Confirm the amount of water supplied to the icemaker.

1) The automatic icemaker can automatically make 6 cubes at a time, 70~120 pieces per day. This quantity may vary by circumstance, including ambient temperature, door opening, freezer load. etc.

2) Icemaking stops when the ice bin is full.

3) If you don't want to use the automatic icemaker, turn the icemaker switch to OFF. If you want to use automatic icemaker again, change the switch to ON.

4) The water amount will vary depending on the water amount selection button. Setting, as well as the water pressure of the connected water line.

NOTE

• It is normal that a noise is produced when ice drops into the ice storage bin.

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Page 18

Dispenser Selection Button

Expres Freezer Selection Button

Door Alarm Button/

Lock Button

Dispenser Light On/Off Button/

Filter Status Display RESET Button

Temperature Adjust Button

For Refrigerator Compartment

Temperature Adjust Button For Freezer Compartment

Display Power Saving Mode

Demo Mode

Buzzer Mute Mode

MICOM FUNCTION

1. Monitor Panel

1-1. GR-P227/GR-P257

1-2. Display Second Function

1. Door Alarm Buzzer Mute Mode

Press ALARM/LOCK to turn the buzzer on or off.

2. Display Power saving Mode

It places display in standby mode until door is opened. Press FREEZER and EXPRESS FRZ. buttons simultaneously to turn all LEDs ON and then OFF with the recognition sound of Ding~ after 5 seconds. (Be sure not to press only one button to work.)

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Page 19

MICOM FUNCTION

Once the mode activates, the display is always OFF. Until door is opened or display button is pressed. When 20 seconds has elapsed after closing door or pressing button, the display turns OFF. To deactivate this mode is same as the activation methods. The mode inactivates when resetting the power.

3. Exhibition Mode

Demo mode is available for displaying the refrigerator in a sales setting or similar condition. It allows the display, dispenser, lights, and fan to operate without running the compressor. To enter the DEMO mode, press and hold the REFRIGERATOR and EXPRESS FRZ. buttons simultaneously for 5 seconds until the Ding~ sounds. To exit the DEMO mode and return to normal operation, press and hold the REFRIGERATOR and EXPRESS FRZ. buttons simultaneously for 5 seconds until the Ding~ sounds again. The refrigerator will default to the NORMAL mode (DEMO mode OFF) if the power fails.

2. Description of Function

2-1-1. Funnction of Temperature Selection

Division Power Initially On 1st Press 2st Press 3th Press 4th Press

Temperature Control

Medium Medium Max Max Min Medium Min

Freezer Control

Refrigeration Control

* 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.

-19 °C -22 °C -23 °C -15 °C -17 °C

3 °C 2 °C 0°C 6 °C 4 °C

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Page 20

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 LOCK text is turned off at the right side of lock graphic of display with the lock replease status.

2. If desiring to lock the dislay the dispenser and control panel, push on the LOCK button more than 3 seconds. LOCK is turned on at the right side of lock graphic of display with lock status.

3. The buzzer sound and control panel and dispenser function is not performed even if pressing display button other than lock key in the lock status.

4. If desiring to release the lock status and pressing the lock button more than 3 seconds. LOCK text is turned off at the right side of lock graphic of display with the lock release status.

2-1-5. Filter condition display function

1. There is a replacement indicator light for the water filter cartridge on the dispenser.

2. Water filter needs replacement once six months.

3. Water filter light and FILTER RESET HOLD 3SECS text turn on to tell you need to replace the filter soon.

4. After replacing the filter, press and hold the lock button more than 3seconds. Then water filter light and FILTER RESET HOLD 3SECS text turn off with reset status.

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Page 21

MICOM FUNCTION

Pressing

Switch

2-2. Dispenser use selection

You can select water or ice.

❉ Please select water, slice ice and square ice by pressing 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.

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 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.

DISPENSER

NOTE : It is normal that a noise is produced when ice made is dropped into the ice bin.

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 bin, break them into small pieces, and then place them into the ice 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 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. Express Freezer

Please select this function for prompt freezer.

• “On” or “Off” is repeated whenever pressing 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.

2-6. Lock

This button stops operation of different button.

• Locking or Release is repeated whenever pressing the .

• Pressing the other button when selecting ‘ALARM/LOCK’, the button does not operate.

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Page 22

MICOM FUNCTION

2-7. Super freezing

1. EXPRESS FRZ freezing is a function to increase the cooling speed of the freezer compartment by running both the

compressor and the fan simultaneously.

2.EXPRESS FRZ is cancelled and the refrigerator returns to its default setting in the event of a power interruption.

3. SelectingEXPRESS FRZ changes only the speed of the cooling without affecting the set temperature.

4. The temperature can be adjusted even when EXPRESS FRZ has been selected and is in progress.

5. The freezer operates at whatever temperature was set at the time EXPRESS FRZ was selected.

6. If you select EXPRESS FRZ, the compressor and fan will run until it is deselected or the cycle time has elapsed.

(3 hours : compressor and fan run / 3 ~ 24 hours : COLDEST operation)

7. If a defrost cycle occurs while an EXPRESS FRZ is already running, EXPRESS FRZ runs for its remaining cycle time

after the defrost cycle is completed. If the defrost cycle takes longer than 30 minutes, EXPRESS FRZ will run for only 2 hours at the end of the defrost cycle.

8. If you press EXPRESS FRZ during a defrost cycle, the EXPRESS FRZ indicator (LCD or LED, depending upon the

model) will illuminate but the compressor will not operate until the defrost cycle is complete.

9. If you press EXPRESS FRZ within 7 minutes of compressor cut-off, the compressor will not operate until the 7-minute

delay has passed.

10. The freezer fan motor runs at high speed during the EXPRESS FRZ cycle.

2-8. *Miracle Zone function

1. Miracle Zone is located at the bottom room of R-room and maintains optimum temperature depending on foods through

selection of desired foods kept in the Miracle Zone from vegetables to meat with a display. Set temperature in the Miracle Zone by using a separate selection button at the right side of the Miracle Zone. Initial notch is in “veg.”status in application of power. Whenever pressing buttons, notch changes while LED is displayed in the order of “veg. → cheeze → meat → veg.”. Provided that selected notch LED turns off if opening doors of the R-room and it turns off if closing doors of R-room.

2. Temperature of the miracle zone is controlled with a stemping damper at the left side of the miracle zone and controlled

with a miracle zone at the rear side of miracle zone.

3. Change of the notch by temperature control S/W at the miracle zone is controlled after 10 seconds have passed after

selecting final notches.

4. Miracle zone damper is forcedly closed during test mode or defrost mode.

2-9. Control of variable type of freezing room fan

Miracle Zone NOTCH meat cheeze veg.

Setting Indication -1°C2°C4°C

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 super 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 115 seconds at the BLDC motor. Then it displays failure (refer to failure diagnosis function table) at the display part of refrigerator, the BLDC motor doesn’t operate more. If you want to operate the BLDC motor, turn off and on power resource.

- 20 -

Page 23

Doors of freezing /

cold storage room

or home bar

BUZZER

Closing

Opening

Within

a minute

A minute

seconds30seconds30seconds

Opening

Closing Closing

3 Times 3 Times 3 Times 3 Times

MICOM FUNCTION

2-10. 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).

2-11. 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.

2-12. Ringing of button selection buzzer

1. If pressing the front display button, “Ding ~ “ sound rings.

2-13. 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.

2-14. 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).

- 21 -

Page 24

MICOM FUNCTION

POWER

COMP

F-FAN

C-FAN

R-STEP MOTOR

DAMPER

HOME

BAR

HEATER

MIRACLE

ZONE STEP

DAMPER

MOTOR

FROST

REMOVAL

HEATER

OFF

HOME

BAR

HEATER

HOME

BAR

HEATER

OFF

FROST

REMOVAL

HEATER

DAMPER

DUCT DOOR

HEATER

DAMPER

DUCT DOOR

HEATER

OFF

0.3

sec.

0.3

sec.

0.3

sec.

0.3

sec.

POWER

PIPE

DISP'

HEATER

sec.

PIPE

DISP'

HEATER

OFF

0.3

sec.

COMP

0.3

sec.

F-FAN

C-FAN

0.3

sec.

R-STEP MOTOR

DAMPER

0.3

sec.

MIRACLE

ZONE STEP

DAMPER

MOTOR

0.3

sec.

HOME

BAR

HEATER

TEST

S/W

(PRESS

Once)

OTHER

LOAD

OFF

COMP

F-FAN

C-FAN

R-STEP MOTOR

DAMPER

MIRACLE

ZONE STEP

DAMPER

MOTOR CLOSE

TEST

S/W

(PRESS

2 Times)

COMP

OFF

F-FAN

C-FAN

OFF

FROST

REMOVAL

HEATER

R-STEP MOTOR

DAMPER

0.3

sec.

0.3

sec.

0.3

sec.

0.3

sec.

0.3

sec.

0.3

sec.

0.3

sec.

0.3

sec.

0.3

sec.

0.3

sec.

0.3

sec.

0.3

sec.

2-15. 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 Load Operation Sequence Remark

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)

Test mode 1 (Compulsory function)

Test mode 2 (Compulsory frost removal)

If error occurs during operation, initial operation is not done.

■

Sequence of load operation when closing F-room and R-room.

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).

- 22 -

Page 25

MICOM FUNCTION

2-16. 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.

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.

✽ All LCDs turn off other than freezer room notch temperature display and refrigerator room notch temperature

display(failure code indication part) in case of indicating failure modes(except for Note1, Note2).

- 23 -

Page 26

MICOM FUNCTION

2-17. 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.

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 Operation Contents Remarks

Test 1

Test 2

Normal

Status

Press test button once (strong cold mode)

Press test button once at the test mode 1 status (forced defrost mode)

Press test button once at the test mode 2 status

1. Continuous operation of compressor

2. Continuous operation of freezing bldc motor (high-speed RPM) and cooling bldc motor

3. Defrost heater turns off

4. Stepping motor damper is completely opened (open of baffle)

5. Miracle zone stepping motor damper is completely closed.

6. All display LCD graphics turns on.

1. Compressor OFF

2. Freezing bldc motor and cooling bldc motor turn off

3. Defrost heater turns on

4. Stepping motor damper is completely closed (closing of baffle)

5. Miracle zone stepping motor damper is completely closed.

6. All display LCD graphics turns off (only LCD turns on for(A) “MIDIUM” status, (B) “MIDIUM” status)

Return to the initial status.

Freezing fan turns off in door opening

Return to the normal mode when the defrost sensor is above +5°C

Compressor will operate after delay for 7 minutes

- 24 -

Page 27

MICOM FUNCTION

✻ LCD check function: If simultaneously pressing super freezer button and freezing 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).

2-18. 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.

- 25 -

Page 28

EXPLATION FOR MICOM CIRCUIT

1. Explanation for PWB circuit

1-1. Power circuit

The power circuit includes a Switched Mode Power Supply (SMPS). It consists of a rectifier (BD1 and CE1) converting AC to DC, a switch (IC2) switching the DC voltage, a transformer, and a feedback circuit (IC3 and IC4).

Caution : Since high voltage (310 Vdc) is maintained at the power terminal, wait at least 3 minutes after unplugging the

appliance to check the voltages to allow the current to dissipate.

Voltage of every part is as follows:

Part VA1 CE1 CE2 CE3 CE4 CE5

Voltage 230 Vac 310 Vdc 16 Vdc 12 Vdc 16 Vdc 5 Vdc

(1) GR-P227/L227

- 26 -

Page 29

EXPLATION FOR MICOM CIRCUIT

1-2. Oscillation circuit

The oscillation circuit generates a basic clock signal for synchronization and time calculation related to the transmission of data and calculations made by the MICOM (IC1). The oscillator (OSC1) must always be replaced with an exact replacement part. If this specification is changed, the change will affect the time calculations of the MICOM and it might not work at all.

(1) GR-P227/L227/P257/L257

1-3. Reset circuit

The RESET circuit allows various parts of the MICOM, such as RAM, defrosting, etc., to be restarted from the initial state when power is interrupted or restored. A LOW signal applied to the reset terminal for 10 ms causes the MICOM to reset itself. During normal operation, the voltage at the reset terminal is 5 Vdc. If the reset fails, the MICOM will not operate.

(1) GR-P227/L227/P257/L257

- 27 -

Page 30

EXPLATION FOR MICOM CIRCUIT

1-4. Load/dispenser operation, door opening circuit

1. LOAD DRIVING CIRCUIT

✽ The fan operates at the regular speed even if the door of the refrigerator or freezer is opened. When the doors are closed,

the fan reverts to its original speed.

✽ (A), (B), (C), and (D) of door switch for the freezer or refrigerator are connected to the door open sensing circuit in parallel

toward both ends of switch to determine door open at MICOM.

✽ In the TEST mode, the fan will stop if any door is opened. It will resume operation when the door is closed.

Type of Load Compressor

Measuring part (IC6) IC6-16 IC6-13 IC6-12 IC6-15 IC6-14

Status

(1) GR-P227/L227/P257/L257

ON Within 1 V

OFF 12 V

Defrost

Heater

AC Converting

Relay

Refrigerator

LAMP

Dispenser

Heater

- 28 -

Page 31

EXPLATION FOR MICOM CIRCUIT

1-5. Dispenser operation circuit

(1) GR-P227/L227/P257/L257

1) Check load driving status

Type of Load

Measuring part IC7-15 IC7-14 IC7-13 IC7-12 IC7-11

Status

2) Lever Switch sensing circuit

Measuring part

Lever S/W

OFF 5V

ON Within 1 V

OFF 12 V

GEARED

MOTOR

SOLENOID

CUBE

5 V

0 V

WATER VALVE

WATER

IC1(Micom) (No. 16)

PILOT

VALVE

(60 Hz)

- 29 -

SOLENOID

DISPENSER

Page 32

EXPLATION FOR MICOM CIRCUIT

1-6. Door opening sensing circuit

(1) GR-P227/L227/P257/L257

Measuring part

Door of Freezer and Refrigerator

Closing 5 V ( A - B , C - D . Switch at both ends are at Off status)

Opening 0 V ( A - B , C - D . Switch at both ends are at On status)

✽ Since door switches (A) and (B) are interconnected, if either fails, the other will not respond properly. ✽ If either switch fails, the light will not come on.

IC1 (MICOM) No. (44, 45) / (45, 46) / (47, 48) Pin

- 30 -

Page 33

EXPLATION FOR MICOM CIRCUIT

1-7. Temperature sensing circuit

(1) GR-P227/L227/P257/L257

The circuits involving the freezer and refrigerator sensors control the temperature in both the freezer and the refrigerator. The icemaker sensor detects when ice is made. The defrost sensor determines both the need for defrosting and the efficiency of the defrost operation. See the table below for voltages and checkpoints.

SENSOR CHECK POINT

Freezing sensor POINT A Voltage

Defrost sensor POINT B Voltage

Refrigerator sensor 1 POINT C Voltage 0.5 V~4.5 V 0 V 5 V

Refrigerator sensor 2 POINT D Voltage

Magic room/ Opti Fresh Sensor POINT E Voltage

NORMAL(-22 °F ~ 122 °F) IN

SHORT IN OPEN

- 31 -

Page 34

EXPLATION FOR MICOM CIRCUIT

1-8. Switch entry circuit

The following circuits are sensing signal form the damper motor reed switch for testing and diagnosing the refrigerator.

(1) GR-P227/L227/P257/L257

1-9. Option designation circuit (model separation function)

(1) GR-P227/L227/P257/L257

The circuits shown above vary according to which features are included on your particular model.

Separation Connection Status Application Standard

OP1

uThese circuits are preset at the factory and cannot be altered.

Connection Miracle Zone exist

OUT Miracle Zone don’t exist

- 32 -

Page 35

EXPLATION FOR MICOM CIRCUIT

INA

INB

CCW (Reverse rotation) (Positive rotation) CW

1-10. Stepping motor operation circuit

(1) GR-P227/L227/P257/L257

The motor is driven by magnetism formed in the areas of the coils and the stator. Rotation begins when a HIGH signal is applied to MICOM Pin 33 of IC10 (TA7774F). This causes an output of HIGH and LOW signals on MICOM pins 34 and 35.

Explanation) The stepping motor is driven by sending signals of 3.33 mSEC via MICOM pins 33, 34, and 35, as shown in

the chart below. These signals are output via terminals 10, 11, 14, and 15 via input terminals 3, 6, and 8 of IC10 (TA7774F), the motor drive chip. The output signals allow the coils wound on each phase of the stator to form a magnetic field, which causes rotation. Input to the terminals INA and INB of IC10 as shown in the chart below drives the motor.

- 33 -

Page 36

EXPLATION FOR MICOM CIRCUIT

1-11. Fan motor driving circuit (freezer, mechanical area)

1. The circuit cuts all power to the fan drive IC, resulting in a standby mode.

2. This circuit changes the speed of the fan motor by varying the DC voltage between 7.5 Vdc and 16 Vdc.

3. This circuit stops the fan motor by cutting off power to the fan when it senses a lock-up condition.

a , d part b part e part

Motor OFF 5V 2V or less 2V or less

Motor ON 2 ~ 3V 12 ~ 14V 8 ~ 16V

(1) GR-P227/L227/P257/L257

- 34 -

Page 37

Temperature compensation at refrigerator

Temperature compensation at freezer

EXPLATION FOR MICOM CIRCUIT

1-12. Temperature compensation and temperature compensation circuit

1. Temperature compensation in freezer and refrigerator

(1) GR-P227/L227/P257/L257

Freezer Refrigerator

Resistance value Temperature Resistance value Temperature Remarks

(RCF1) compensation (RCR1) compensation

180 kΩ +5 °C [+9°F] 180 kΩ +2.5 °C [+4.5°F] Warmer

56 kΩ +4 °C [+7.2°F] 56 kΩ +2.0 °C [+3.6°F]

33 kΩ +3 °C [+5.4°F] 33 kΩ +1.5 °C [+2.7°F]

18 kΩ +2 °C [+3.6°F] 18 kΩ +1.0 °C [+1.8°F]

12 kΩ +1 °C [+1.8°F] 12 kΩ +0.5 °C [+0.9°F]

10 kΩ 0 °C [0°F] 10 kΩ 0 °C [0°F]

8.2 kΩ -1 °C [-1.8°F] 8.2 kΩ -0.5 °C [-0.9°F]

5.6 kΩ -2 °C [-3.6°F] 5.6 kΩ -1.0 °C [-1.8°F]

3.3 kΩ -3 °C [-5.4°F] 3.3 kΩ -1.5 °C [-2.7°F]

2 kΩ -4 °C [-7.2°F] 2 kΩ -2.0 °C [-3.6°F]

470 Ω -5 °C [-9°F] 470 Ω -2.5 °C [-4.5°F] Cooler

Reference temperature

u Temperature compensation table by adjustment value (difference value against current temperature)

Ex) If you change compensation resistance at a refrigerator (RCR1) from 10 kΩ (current resistance) to 18 kΩ (modified

resistance), the temperature at the refrigerator will increase by +1°C[+1.8°F].

- 35 -

Page 38

EXPLATION FOR MICOM CIRCUIT

u Temperature compensation table at the refrigerator is as follows:

Modification

resistance

Current resistance

470Ω [0.9 °F] [1.8 °F] [2.7 °F] [3.6 °F] [4.5 °F] [5.4 °F] [6.3 °F] [7.2 °F] [8.1 °F] [9 °F]

2 kΩ [0.9 °F] [0.9 °F] [1.8 °F] [2.7 °F] [3.6 °F] [4.5 °F] [5.4 °F] [6.3 °F] [7.2 °F] [8.1 °F]

3.3 kΩ [1.8 °F] [0.9 °F] [0.9 °F] [1.8 °F] [2.7 °F] [3.6 °F] [4.5 °F] [5.4 °F] [6.3 °F] [7.2 °F]

5.6 kΩ [2.7 °F] [1.8 °F] [0.9 °F] [0.9 °F] [1.8 °F] [2.7 °F] [3.6 °F] [4.5 °F] [5.4 °F] [6.3 °F]

8.2 kΩ [3.6 °F] [2.7 °F] [1.8 °F] [0.9 °F] [0.9 °F] [1.8 °F] [2.7 °F] [3.6 °F] [4.5 °F] [5.4 °F]

Refrigerator

470 Ω 2 kΩ 3.3 kΩ 5.6 kΩ 8.2 kΩ 10 kΩ 12 kΩ 18 kΩ 33 kΩ 56 kΩ 180 kΩ

No 0.5 °C1 °C 1.5 °C2 °C 2.5 °C3 °C 3.5 °C4 °C 4.5 °C5 °C

change

0.5 °C No 0.5 °C1 °C 1.5 °C2 °C 2.5 °C3 °C 3.5 °C4 °C 4.5 °C

Down change

1 °C 0.5 °C No 0.5 °C1 °C 1.5 °C2 °C 2.5 °C3 °C 3.5 °C4 °C

Down

1.5 °C1 °C 0.5 °C No 0.5 °C1 °C 1.5 °C2 °C 2.5 °C3 °C 3.5 °C

Down Down Down

2 °C 1.5 °C1 °C 0.5 ° No 0.5 °C1 °C 1.5 °C2 °C 2.5 °C3 °C

Down Down Down

Up Up Up Up Up Up Up Up Up Up

Up Up Up Up Up Up Up Up Up

Down

change

Up Up Up Up Up Up Up Up

change

Drop

Up Up Up Up Up Up Up

change

Up Up Up Up Up Up

(RCR1) 2.5 °C2 °C 1.5 °C1 °C 0.5 °C No 0.5 °C1 °C 1.5 °C2 °C 2.5 °C

10 kΩ [4.5 °F] [3.6 °F] [2.7 °F] [1.8 °F] [0.9 °F] [0.9 °F] [1.8 °F] [2.7 °F] [3.6 °F] [4.5 °F]

Down Down Down Down Down

3 °C 2.5 °C2 °C 1.5 °C1 °C 0.5 °C No 0.5 °C1 °C 1.5 °C2 °C

12 kΩ [5.4 °F] [4.5 °F] [3.6 °F] [2.7 °F] [1.8 °F] [0.9 °F] [0.9 °F] [1.8 °F] [2.7 °F] [3.6 °F]

Down Down Down Down Down Down

3.5 °C3 °C 2.5 °C2 °C 1.5 °C1 °C 0.5 °C No 0.5 °C1 °C 1.5 °C

18 kΩ [6.3 °F] [5.4 °F] [4.5 °F] [3.6 °F] [2.7 °F] [1.8 °F] [0.9 °F] [0.9 °F] [1.8 °F] [2.7 °F]

Down Down Down Down Down Down Down

4 °C 3.5 °C3 °C 2.5 °C2 °C 1.5 °C1 °C 0.5 °C No 0.5 °C1 °C

33 kΩ [7.2 °F] [6.3 °F] [5.4 °F] [4.5 °F] [3.6 °F] [2.7 °F] [1.8 °F] [0.9 °F] [0.9 °F] [1.8 °F]

Down Down Down Down Down Down Down Down

4.5 °C4 °C 3.5 °C3 °C 2.5 °C2 °C 1.5 °C1 °C 0.5 °C No 0.5 °C

56 kΩ [8.1 °F] [7.2 °F] [6.3 °F] [5.4 °F] [4.5 °F] [3.6 °F] [2.7 °F] [1.8 °F] [0.9 °F] [0.9 °F]

Down Down Down Down Down Down Down Down Down

5 °C 4.5 °C4 °C 3.5 °C3 °C 2.5 °C2 °C 1.5 °C1 °C 0.5 °CNo

180 kΩ [9 °F] [8.1 °F] [7.2 °F] [6.3 °F] [5.4 °F] [4.5 °F] [3.6 °F] [2.7 °F] [1.8 °F] [0.9 °F]

Down Down Down Down Down Down Down Down Down Down

u Temperature compensation at the freezer is performed the same as at the refrigerator. The value for the freezer is twice

that of the refrigerator.

u This circuit enters the necessary level of temperature compensation for adjusting the appliance. The method is the same

for every model in this appliance family.

change

Up Up Up Up Up

change

Up Up Up Up

change

Up Up Up

change

Up Up

change

- 36 -

Page 39

EXPLATION FOR MICOM CIRCUIT

2. Compensation circuit for temperature at freezer

(1) GR-P227/L227/P257/L257

Temperature compensation in CUT

JCR1 +1 °C [+1.8 °F]

JCR2 +1 °C [+1.8 °F]

JCR3 -1 °C [-1.8 °F]

JCR4 -1 °C [-1.8 °F]

+2 °C [+3.6 °F]

-2 °C [-3.6 °F]

Compensation Compensation

for too warm for too cold

JCR3 JCR4 JCR1 JCR2

CUT -1 °C [-1.8 °F]

CUT +1 °C [+1.8 °F]

CUT CUT -2 °C [-3.6 °F]

CUT CUT +2 °C [+3.6 °F]

CUT CUT 0 °C [0 °F]

CUT CUT CUT -1 °C [-1.8 °F]

CUT CUT CUT +1 °C [+1.8 °F]

CUT CUT CUT CUT 0 °C [0 °F]

Temperature compensation value

at refrigerator

0 °C (In shipment from factory)

Remarks

u This circuit allows adjustment of the set temperature for compensation by changing jumpers at locations JCR1~JCR4.

- 37 -

Page 40

EXPLATION FOR MICOM CIRCUIT

Main MICOM LCD(LED) dedicated MICOM

DC 12V

GND

Transmission (error status)

Reception (notch status)

Main PCB L/Wire FD/H(4-wires) Display PCB

1-13. Communication circuit and connection L/Wire between main PCB and display PCB

The following communication circuit is used for exchanging information between the main MICOM of the Main PCB and the dedicated MICOM of the LED (LCD) Display PCB.

A bi-directional lead wire assembly between the two boards is required for the display to function properly.

Poor communication occurs if a continuous information exchange fail to continue for more than 2 minutes between main MICOM of main PCB and LCD (LED) dedicated MICOM for LCD (LED) control of display PCB.

(1) GR-P227/L227/P257/L257

- 38 -

Page 41

EXPLATION FOR MICOM CIRCUIT

2) Sensor resistance characteristics table

Measuring Temperature (°C) Freezing Sensor

-20 °C 22.3 kΩ 77 kΩ

-15 °C 16.9 kΩ 60 kΩ

-15 °C 13.0 kΩ 47.3 kΩ

-5 °C 10.1 kΩ 38.4 kΩ

0 °C 7.8 kΩ 30 kΩ

+5 °C 6.2 kΩ 24.1 kΩ

+10 °C 4.9 kΩ 19.5 kΩ

+15 °C 3.9 kΩ 15.9 kΩ

+20 °C 3.1 kΩ 13 kΩ

+25 °C 2.5 kΩ 11 k Ω

+30 °C 2.0 kΩ 8.9 kΩ

+40 °C 1.4 kΩ 6.2 kΩ

+50 °C 0.8 kΩ 4.3 kΩ

Refrigerator sensor 1&2

Defrost sensor, Ambient sensor

u Resistance value allowance of sensor is ±5%. u When measuring the resistance value of the sensor, allow the temperature of that sensor to stabilize for at least 3 minutes

before measuring. This delay is necessary because of the sense speed relationship.

u Use a digital tester to measure the resistance. An analog tester has to great a margin of error. u Resistance of the cold storage sensor 1 and 2 shall be measured with a digital tester after separating CON8 of the PWB

ASSEMBLY and the MAIN part.

u Resistance of the freezing sensor shall be measured with a digital tester after separating CON7 of the PWB ASSEMBLY

and the MAIN part.

- 39 -

Page 42

EXPLATION FOR MICOM CIRCUIT

1-14. Miracle Zone STEPPING MOTOR / Display

Miracle zone stepping motor damper is same as 1-8 stepping motor operation circuit and the miracle zone display turns on only when the R-door opens.

- 40 -

Page 43

¥ Adjusts EJECTOR to

Start Position

with power on.

Power On

Start Position

Icemaking

Mode

Harvest

Mode

Park Position

Fill

Test Mode

¥ Waits until water becomes ice after starting the

icemaking operation.

¥ Runs MOTOR to drop ice from the tray into the ICE BIN.

(During harvest mode, check if the ice bin is full)

¥ Performs

Ice Making Mode

after supplying water by operating

the SOLENOID in ICE VALVE.

¥ To operate LINE and SERVICE, press and hold the

Water

amount selection button

for 3 seconds.

The icemaker will run through 3 stages:

Harvest Fill Icemaking

¥ With the detect lever, checks if the ICE BIN is full.

ICEMAKER AND DISPENSER WORKING PRINCIPLES AND REPAIR

1. Operation Principle

1-1. Operation Principle of Icemaker

1. Turning the Icemaker switch off (O) stops the ice making function.

2. Setting the Icemaker switch to OFF and then turning it back on will reset the icemaker control.

- 41 -

Page 44

ICEMAKER AND DISPENSER WORKING PRINCIPLES AND REPAIR

2. ICEMAKER FUNCTIONS

2-1. Start Position

1. After POWER OFF or power outage, check the EJECTOR's position with MICOM initialization to restart.

2. How to check if it is in place:

- Check HIGH/LOW signals from HALL SENSOR in MICOM PIN.

3. Control Method to check if it is in place: (1) EJECTOR is in place,

- It is an initialized control, so the mode can be changed to icemaking mode.

(2) EJECTOR isn't in place:

A. If EJECTOR is back in place within 2 minutes with the motor on, it is being initialized. If not, go to Step B. B. Control the heater using the temperature sensor until the EJECTOR reaches the correct location.

2-2. Icemaking Mode

1. Icemaking refers to the freezing of supplied water in the ice tray. Complete freezing is assured by measuring the temperature of the Tray with Icemaking SENSOR.

2. Icemaking starts after completion of the water fill operation.

3. The Ice Making function is completed when the sensor reaches 19°F (-7°C), 55 minutes after starting.

NOTE : After Icemaker Power is ON, the Icemaker heater will be on for test for 6 sec.

2-3. Harvest Mode

1. Harvest (Ice removing) refers to the operation of dropping ices into the ice bin from the tray when icemaking has completed.

2. Harvest mode: (1) The Heater is ON for 30 seconds, then the motor starts. (2) The feeler arm senses the quantity of ice in the ice bin while rotating with the EJECTOR.

A. ice bin is full : The EJECTOR stops (heater off). B. ice bin is not full : The EJECTOR rotates twice to open for ice.

If the EJECTOR does not rotate once within 5 minutes in B mode, separate heater control mode starts operating to prevent the EJECTOR from being constrained. (It is recommended that the user open for ice to return to normal mode.)

2-4. Fill/Park Position

1. Once a normal harvest mode has been completed, the water solenoid will be activated.

2. The amount of water is adjusted by pressing the Fill Key repeatedly. This changes the time allowed for fill as illustrated in the table below.

Water supply amount TABLE

STAGE TIME TO SUPPLY INDICATIONS REMARKS

5 sec.

5.5 sec.

(FIRST STAGE)

6 sec.

The water amount will vary depending

on the water control switch setting, as

well as the water pressure of the

connected water line.

- 42 -

Page 45

ICEMAKER AND DISPENSER WORKING PRINCIPLES AND REPAIR

2-5. Function TEST

1. This is a forced operation for TEST, Service, cleaning, etc. It is operated by pressing and holding the Water amount selection button for 3 seconds.

2. The test works only in the Icemaking Mode. It cannot be entered from the Harvest or Fill mode. (If there is an ERROR, it can only be checked in the TEST mode.)

3. Caution! If the test is performed before water in the ice tray is frozen, the ejector will just pass through the water. When the Fill mode begins (Stage 4), unless the water supply has been shut off, added water will overflow into the ice bin. If the control doesn’t operate normally in the TEST mode, check and repair as needed.

4. After water is supplied, the normal CYCLE is followed: icemaking → Harvest → Fill → Park Position.

5. After Stage 5 is completed, the Ice Maker returns to MICOM control. The time needed to supply water resets to the pretest setting.

6. This icemaker function test takes about 90 seconds in case, there aren’t ices in the ice tray. If there are ices in the ice tray, it can take more than 90 seconds.

Diagnosis TABLE

STAGE ITEMS INDICATOR REMARKS

Five seconds after heater starts, a

HEATER

heater will go off if the temperature by sensor is higher than 10°C

MOTOR

HALL IC I

(detection of

position)

HALL IC II

(detection of

position)

VALVE

Reset

Return to Status prior to TEST MODE

Five seconds after heater starts, you can confirm that a motor is moving.

After the icemaker detects that ice has been made, the motor and heater are off but on standby until the cycle is cancelled.

You can confirm HALL IC detection of position.

Two seconds after detection of initial position, you can confirm that valve is on.

Five seconds after fifth stage is completed, The icemaker resets to initial status.

3. Defect diagnosis function

3-1. ERROR CODES shown on Icemaker water supply control panel

NO DIVISION INDICATOR CONTENTS REMARKS

Normal

Mark time to

supply

None

Display switch

operates properly

ERROR indicators in table can be checked only in TEST mode.

Icemaking

Sensor

malfunction

Open or short-circuited wire

- 43 -

Make sure that the wire

on each sensor is

connected.

Page 46

CIRCUIT

(1) GR-P227/L227/P257/L257GR-P227/L227/P257/L257

- 44 -

Page 47

TROUBLE DIAGNOSIS

1. Trouble Shooting

CLAIMS. CAUSES AND CHECK POINTS. HOW TO CHECK

1. Faulty start

1) No power on outlet.

2) No power on cord.

Bad connection between adapter and outlet. (faulty adapter)

The Inner diameter of adapter. The distance between holes. The distance between terminals. The thickness of terminal.

Bad connection between plug and adapter (faulty plug).

The distance between pins. Pin outer diameter.

3) Shorted start circuit. No power on

power cord.

Disconnected copper wire.

Internal electrical short.

Faulty terminal contact.

Disconnected.

Weak connection. Short inserted cord length. Worn out tool blade.

Power cord is disconnected.

Faulty soldering.

Loose contact.

- Large distance between male terminal.

- Thin female terminal.

Terminal disconnected.

Bad sleeve assembly.

* Measuring instrument :

Multi tester

■ Check the voltage. If the voltage is within ±85% of the rated voltage, it is OK.

■ Check the terminal movement.

■

Check both terminals of power cord. Power conducts : OK. No power conducts : NG

O.L.P is off.

No electric power on compressor. - Faulty compressor.

Faulty PTC.

4) During defrost.

Capacity of O.L.P is small.

Characteristics of O.L.P is bad.

Bad connection.

Power is disconnected.

Power does not conduct. - Damage.

Bad characteristics. - Initial resistance is big.

Bad connection with compressor.

Bad terminal connection.

Start automatic defrost. Cycle was set at defrost when the refrigerator

was produced.

Inner Ni-Cr wire blows out. Bad internal connection. Faulty terminal caulking (Cu wire is cut). Bad soldering.

Too loose. Assembly is not possible.

■ Check both terminals of O.L.P. If power conducts : OK. If not : NG.

■ Check the resistance of both terminals. At normal temperature 6 : OK. If disconnected : ∞.

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Page 48

TROUBLE DIAGNOSIS

CLAIMS. CAUSES AND CHECK POINTS. HOW TO CHECK

2. No cooling.

2) Refrigeration system is clogged.

Moisture clogged.

No electric power on thermostat.

Weld joint clogged.

Drier cloggeing.

Residual moisture

in the evaporator.

Residual moisture.

Insufficient drier capacity.

Residual moisture in pipes.

Moisture penetration - Leave it in the air. - Moisture penetration. into the refrigeration oil.

Short pipe insert.

Pipe gaps.

Too much solder.

Too large. Damaged pipes.

The capillary tube inserted depth. - Too much.

Capillary tube melts. - Over heat.

Clogged with foreign materials.

Reduced cross section by cutting. - Squeezed.

Air Blowing.

Leave it in the air.

Caps are missed.

Not dried in the compressor. Elapsed more than 6 months after drying Caps are missed. No pressure when it is open.

Dry drier - Drier temperature.

Leave it in the air.

Caps are missed.

Air blowing.

Not performed. Too short. Impossible moisture

confirmation. Low air pressure.

During rest time.

After work.

Check on package condition.

Good storage after finishing.

During transportation. During work.

Not performed. Performed.

Too short time. Low air pressure. Less dry air.

Desiccant powder. Weld oxides. Drier angle.

■ Check the clogged evaporator by heating (as soon as the cracking sound begins, the evaporator start freezing)

■ The evaporator does not cool from the beginnig (no evidece of misture attached). The evaporator is the same as before even heat is applied.

Foreign material clogging.

Compressor cap is disconnected. Foreign materials are in the pipe.

- 46 -

Page 49

TROUBLE DIAGNOSIS

CLAIMS. CAUSES AND CHECK POINTS. HOW TO CHECK

3. Refrigeration is weak.

1) Refrigerant Partly leaked.

2) Poor defrosting capacity.

Drain path (pipe) clogged.

Defrost heater does not generate heat.

Weld joint leak. Parts leak.

Inject P/U into drain hose.

Foreign materials penetration.

Cap drain is not disconnected.

Parts disconnected.

P/U lump input. Screw input. Other foreign materials

input.

Heater Sheath

Inject through the hole.

Seal with drain.

Wire is cut.

- Lead wire.

- Heating wire.

- Contact point between heating and electric wire.

Dent by fin evaporator. Heating wire is corroded

- Water penetration.

Bad terminal connection.

■ Check visually.

■ Check terminal

Conduction: OK. No conduction: NG. If wire is not cut, refer to resistance. P=Power V=Voltage R=Resistance

P= —

R= —

- 47 -

Page 50

TROUBLE DIAGNOSIS

CLAIMS. CAUSES AND CHECK POINTS. HOW TO CHECK

3. Refrigeration is weak.

Residual frost.

No automatic defrosting.

Defrost does not return.

Weak heat from heater.

Too short defrosting time. Defrost Sensor.

Structural fault. Gasket gap.

Sheath Heater - rated. Heater plate - rated.

- Faulty characteristics.

Seat-D(missing, location. thickness).

Air inflow through the fan motor.

Bad insulation of case door.

3) Cooling air leak. Bad gasket adhestion

Door sag.

4) No cooling air circulation.

Faulty fan motor.

Bad adhesion. Weak binding force at hinge.

Gap. Bad attachment. Contraction.

Fan motor.

Door switch.

Self locked. Wire is cut. Bad terminal contact.

Faults.

Refrigerator and freezer switch reversed. Button is not pressed.

Contact distance. Button pressure. Melted contact. Contact.

Poor door attachment. Door liner (dimension). Contraction inner liner. Misalignment. Bad terminal connection. P/U liquid leak.

■ Check the fan motor conduction: OK. No conduction: NG.

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Page 51

TROUBLE DIAGNOSIS

CLAIMS. CAUSES AND CHECK POINTS. HOW TO CHECK

3. Refrigeration is weak.

4) No cooling air circulation.

Faulty fan motor.

Small cooling air discharge.

5) Compressor capacity.

Fan is constrained.

Insufficient motor RPM

Faulty fan.

Shorud. Bent.

Ice and foreign materials on rotating parts.

Fan shroud contact. - Clearance. Damping evaporator contact. Accumulated residual frost.

Fan overload. - Fan misuse. Bad low termperature RPM characteristics. Rated power misuse. Low voltage.

Fan misuse. Bad shape. Loose connection. - Not tightly connected. Insert depth.

Rating misuse. Small capacity. Low valtage.

6) Refrigerant too much or too little.

7) Continuous operation

- No contact of temperature controller. - Foreign materials.

8) Damper opens continuously.

Foreign materials jammed.

Failed sensor. - Position of sensor. Characteristics

of damper.

9) Food storing place. - Near the outlet of cooling air.

Malfunction of charging cylinder. Wrong setting of refrigerant. Insufficient compressor. - Faulty compressor.

P/U liquid dump. EPS water sediment. Screw.

Bad characteristics of its own temperatue. Parts misuse. Charge of temperature - Impact.

characteristics.

■ Check visually after disassembly.

- 49 -

Page 52

TROUBLE DIAGNOSIS

CLAIMS. CAUSES AND CHECK POINTS. HOW TO CHECK

4. Warm refrigerator compartment temperature.

5. No automatic operation. (faulty

contacts.)

1) Colgged cooling path.

P/U liquid leak. Foreign materials. –– P/U dump liquid.

2) Food storate.

1) Faulty temperature sensor in freezer or refrigerator compartment.

Faulty contact. Faulty temperature characteristics.

2) Refrigeration load is too much.

3) Poor insulation.

4) Bad radiation.

5) Refrigerant leak.

6) Inadequate of refrigerant.

7) Weak compressor discharging power.

8) Fan does not work.

9) Button is positioned at "strong."

Store hot food. Store too much at once. Door open. Packages block air flow.

Food.

Frequent opening and closing. Cool air leak. Poor door close. – Partly opens.

High ambient temperature. Space is secluded.

Too much food. Hot food.

Different rating. Small capacity.

■ Inspect parts measurements and check visually.

6. Dew and ice formation.

1) Ice in freeezer compartment. External air inflow. –– Rubber motor assembly direction(reverse).

Door opens but not closes.

Gap around gasket. –– Contraction, distortion, loose, door twisted, corner not

Food vapor. –– Storing hot food. –– Unsealed food.

2) Condensation in the refrigerator compartment. Door opens but not closes.

Gasket gap.

3) Condensation on liner foam. Cool air leak

and transmitted.

Weak door closing power. Stopper malfunction. Door sag. Food hinders door closing.

fully inserted.

Insufficient closing. Door sag. Food hinders door closing.

Not fully filled.

Flange gap. –– Not sealed. Gasket gap.

Toop table part. Out plate R/L part.

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Page 53

TROUBLE DIAGNOSIS

CLAIMS. CAUSES AND CHECK POINTS. HOW TO CHECK

6. Dew and ice formation.

4) Dew on door. Dew on the duct door. - Duct door heater is cut. Dew on the dispense

recess.

Dew on the door surface. Not fully filled. Surface.

Dew on the gasket surface.

5) Water on the floor. Dew in the refrigerator compartment. Defrosted water overflows. Clogged discharging hose. Discharging hose Evaporation tray located at wrong place. location. Tray drip. Damaged.

Position of drain.

Recess Heater is cut. Duct door is open. / Foreign material clogging.

Cormer.

P/U liquid contraction.

Bad wing adhesion. Wing sag(lower part).

Door liner shape mismatch.

Corner. Too much notch.

Broken.

Home Bar heater is cut.

Breaks, holes. Small Capacity.

Liquid shortage. Liquid leak.

7. Sounds

1) Compressor compartment operating sounds. Compressor sound Sound from machine itself.

inserted. Sound from vibration.

Restrainer. Rubber Too hard. seat. Distorted.

Aged. Burnt.

Stopper. Bad Stopper Not fit

assembly. (inner

diameter

of stopper). Tilted. Not

Compressor base not connected. Bad welding compressor stand(fallen). Foreign materials in the compressor

compartment.

O.L.P.

sound.

Capacitor noise. Pipe sound. No vibration damper. Damping rubber-Q.

Chattering Insulation paper vibration. Pipe contacts each other. – Narrow interval.

Capillary tube unattached.

sound.

Damping rubber-S.

- 51 -

Page 54

TROUBLE DIAGNOSIS

CLAIMS. CAUSES AND CHECK POINTS. HOW TO CHECK

7. Sounds

1) Compressor compartment operating sounds. Transformer

Drip tray vibration sound.

Back cover machine sound.

Condenser drain sound.

2) Freezer compartment sounds. Fan motor sound.

Sounds from fan contact.

Unbalance fan sounds.

sound.

Its own fault. –– Core gap. Bad connection. –– Correct screw connection.

Bad assembly. Distortion. Foreign materials inside.

Bad connection. Partly damaged.

Not connected. Bad pipe caulking.

Normal operating sound. Vibration sound.

Fan guide contact. Shroud burr contact. Damping evaporator contact. Residual frost contact.

Unbalance.

Aged rubber seat. Bad torque for assembling motor bracket.

Poor treatment Cord heater. Narrow evaporator interval.

Surface machining conditions. Fan distortion. Misshappen. Burr.

Ice on the fan. –– Air intake (opposite to motor

rubber assembly.)

Motor shaft contact sounds.

Resonance. Evaporator noise.

3) Bowls and bottles make contact on top shelf.

4) Refrigerator roof contact.

5) Refrigerator side contact.

6) Insufficient Lubricants on door hinge.

Supporter disorted. Tilted during motor assembly.

Evaporator pipe contact. –– No damping evaporator. Sound from refrigerant. –– Stainless steel pipe shape in

Sound from fin evaporator and pipe during expansion and contraction.

accumulator.

- 52 -

Page 55

TROUBLE DIAGNOSIS

CLAIMS. CAUSES AND CHECK POINTS. HOW TO CHECK

8. Faulty lamp (freezer and

refrigerator compartment).

9. Faulty internal voltage(short).

1) Lamp problem. Filament blows out. Glass is broken.

2) Bad lamp assembly. Not inserted. Loosened by vibration.

3) Bad lamp socket.

Disconnection. Bad soldering.

Bad rivet contact.

Short. Water penetration. Low water

level in tray.

Bad elasticity of contact. Bad contact(corrosion).

4) Door switch. Its own defect.

Refrigerator and freezer switch is reversed. Travlel distance. Bad connection. Bad terminal contact. P/U liquid leak..

1) Lead wire is damaged.

Wire damage when assembling P.T.C. Cover. Outlet burr in the bottom plate. Pressed by cord heater. lead wire, evaporator pipe.

2) Exposed terminal.

Compressor Compartment terminal. - Touching other

components.

Freezer compartment terminal. - Touching evaporator pipe.

3) Faulty parts.

Transformer. Coil contacts cover.

Welded terminal parts contact cover. Compressor. Bad coil insulation. Plate heater. Melting fuse. Sealing is broken. Moisture penetration. Cord heater. Pipe damaged. Moisture penetration.

Bad sealing. Sheath heater.

■ Connect conduction and non-conduction parts and check with tester. Conduction: NG. Resistance∞: OK.

- 53 -

Page 56

TROUBLE DIAGNOSIS

CLAIMS. CAUSES AND CHECK POINTS. HOW TO CHECK

10. Structure, appearance and others.

1) Door foam. Sag.

Weak torque of hinge connection.

Weak gasket adhesion. Fixed tape.

Bolt is loosened during transportaion. Not tightly fastened. Screw worn out . Adhesion surface.

Not well fixed.

Noise during operation.

Malfunction.

2) Odor. Temperature of

refrigerator compartment.

Deodorizer.

Food Storage.

Others.

Hinge interference.

Not closed Interference between door liner and inner liner. Refrigerator compartment is opened when freezer compartment is closed (faulty stopper).

High. Faulty damper control.

No deodorizer. Poor capacity.

Seal condition. Store special odorous food. Long term storage.

Odors from chemical procucts.

Bigger door foam. Hinge-Pin tilted-Poor flatness. No washer. No grease and not enough quantity.

Stopper worn out. Bad freezer compartment door assembly. No stopper.

Button is set at "weak". Door is open (interference by food).

- 54 -

Page 57

-55-

2. Faults

2-1. Power

Problems Causes Checks Measures Remarks

No power on - Power cord cut. - Check the voltage with tester. -Replace the components.

outlet. - Faulty connector insertion. - Check visually. -Reconnect the connecting parts.

- Faulty connection between plug - Check visually. - Reconnect the connecting parts.

and adapter.

Fuse blows out. - Short circuit by wrong connection. - Check the fuse with tester - Find and remove the cause of - Replace with rated

- Low voltage products are or visually. problem(ex. short, high voltage, fuse after confirming

connected to high voltage. - Check the input volt are with tester low voltage). its specification.

- Short circuit by insects. (between power cord and products). - Replace with rated fuse.

- Electricity leakage. - Check the resistance of power cord ■ If fuse blowns out

- High voltage. with testerf (if it is 0Ω, it is shorted). frequently, reconfirm

- Short circuit of components the cause and prevent.

(tracking due to moisture and dust

penetration).

2-2. Compressor

TROUBLE DIAGNOSIS

Problems Causes Checks Measures Remarks

Compressor - Faulty PTC. - Check the resistance. - If resistance is infinite, replace it

does not Vlaue:∞ is defective. with new one.

operate. - If it is not infinite, it is normal.

- Check other parts.

- Compressor is frozen. - If compressor assembly parts are - During forced operation:

normal(capacitor, PTC, OLP), - Operates: Check other parts.

apply power directly to the - Not operate: Replace the frozen

compressor to force operation. compressor with new one, weld,

Auxiliary winding

Main winding

Power

OLP It starts as soon as it is • Refer to weld repair procedures.

contacted.

evacuate, and recharge refrigerant.

Page 58

-56-

2-3. Temperature

Problems Causes Checks Measures Remarks

High Poor cool air circulation due to faulty - Lock –– Check resistance with a - Replace fan motor.

temperature fan motor. tester.

in the freezer 0Ω: short.

compartment. ∞Ω: cut. - Reconnect and reinsert.

- Rotate rotor manually and check

rotation.

- Wire is cut.

- Bad terminal contact: Check - Maintain clearance and remove ice

terminal visually. (Repair and/or replace shroud if fan

- Fan constraint. – Fan shroud is constrained by shroud

contact: Confirm deformation).

visually.

– Fan icing:

Confirm visually.

Faulty fan motor due to faulty door - Iced button (faulty) operation: - Confirm icing causes and repair.

switch operation. Press button to check - Replace door switch.

- Faulty button pressure and contact:

Press button to check operation.

- Door cannot press door switch - Door sag: fix door.

button: Check visually. - Door liner bent:replace door or

attach sheets.

TROUBLE DIAGNOSIS

Bad radiation conditions in - Check the clearance between the - Keep clearance between - The fan may be

compressor compartment. refrigerator and wall (50 mm in refrigerator and walls (minimum broken if cleaning

minimum). 50mm). performs while the

- Check dust on the grill in - Remove dust and contaminants refrigerator is on.

compressor compartment. from grill for easy heat radiation.

- Check dust on the coils condenser. - Remove the dust with vacuum

cleaner from the coils condenser

while the refrigerator is off.

Page 59

2-4. Cooling

Problems Causes Checks Measures Remarks

TROUBLE DIAGNOSIS

-57-

High Refrigerant leak. Check sequence

temperature 1. Check the welded parts of the refrigerant.

in the freezer drier inlet and outlet and drier

compartment. auxiliary in the compressor

compartment (high pressure side).

2. Check the end of compressor

sealing pipe (low pressure side).

3. Check silver soldered parts.

(Cu + Fe / Fe + Fe).

4. Check bending area of wire

condenser pipe in compressor

compartment (cracks can

happen during bending).

5. Check other parts (compressor

compartment and evaporators in

freezer compartment).

Shortage of refrigerant. Check frost formation on the surface - Find out the leaking area, repair, Drier must be replaced.

of evaporator in the freezer evacuate, and recharge the

compartment. refrigerant.

- If the frost forms evenly on the - No leaking, remove the remaining

surface, it is OK. refrigerant, and recharge new

- If it does not, it is not good. refrigerant.

Weld the leaking part, recharge the Drier must be replaced.

Page 60

-58-

TROUBLE DIAGNOSIS

Problems Causes Checks Measures Remarks

High Cycle pipe is clogged. Check sequence. - Heat up compressor discharging Direr must be replaced.

temperature in 1. Check temperature of condenser weld joints with touch, disconnect

the freezer manually. the pipes, and check the clogging.

compartment. If it is warm, it is OK. Remove the causes of clogging,

If it is not, compressor discharging weld, evacuate, and recharge

joints might be clogged. the refrigerant.

2. Manually check whether hot line - If it's warm, it's OK. If it's not,

pipe is warm. condenser discharging line weld

If it is warm, it's OK. joints might be clogged.

If it is not, condenser outlet weld Disconnect with torch, remove the

joints might be colgged. causes, evacuate, and recharge

seal refrigerant.

Leak at loop pipe weld joint Check sequence. Replace the compressor, weld, Drier must be replaced.

(discharge) in compressor. 1. Manually check whether evacuate, and recharge refrigerant.

condenser is warm, It is not warm

and the frost forms partly on the

evaporator in the freezer

compartment.

Faulty cooling fan in the compressor Check sequence. - Replace if motor does not operate.

compartment. 1. Check cooling fan operation. - If fan is disconnected, check fan

2. Check that cooling fan is damage and reassemble it.

disconnected from the motor. ■ Refer to fan motor disassembly

and assembly sequence.

Page 61

-59-

2-5. Defrosting failure

Problems Causes Checks Measures Remarks

No defrosting. Heater does not generate heat as 1. Check the resistance of heater. Heating wire is short and wire is cut. Seal the lead wire with

the heating wire is cut or the circuit 0Ω: Short. ∞Ω: Cut. • Parts replacement: Refer to parts insulation tape and heat

is shorted. Tens to thousands Ω: OK. explanations. contraction tube if the cut

1) Heating wire is damaged when 2. Check the resistance between lead wire is accessible to

inserting into the evaporator. housing terminal and heater repair.

2) Lead wire of heater is cut. surface.

3) Heating wire at lead wire contacts 0Ω: Short. ∞Ω: Cut.

is cut. Tens to thousands Ω: Short.

Sucking duct and discharging hole 1. Confirm foreign materials. In case 1) Push out impurities by inserting

are clogged: of ice, insert the copper line copper wire.(Turn off more than

1. Impurities. through the hole to check. 3hours and pour in hot water if

2. Ice. 2. Put hot water into the drain frost is severe.)

(check drains outside). 2) Put in hot water to melt down frost.

3) Check the water outlet.

4) Push the heater plate to sucking

duct manually and assemble the

disconnected parts.

Gap between Sucking duct and 1. Confirm in the Sucking duct. 1) Turn off the power, confirm

Heater plate(Ice in the gap). impurities and ice in the gap, and

supply hot water until the ice in the

gap melts down.

2) Push the Heater plate to drain

bottom with hand and assemble

the disconnected parts.

Wrong heater rating (or wrong 1. Check heater label. Faults:replace.

assembly). 2. Confirm the capacity after - How to replace: Refer to main parts.

substituting the resistance value

into the formula.

P= ––

(V: Rated voltage of user country)

(R: Resistance of tester[Ω])

Compare P and lavel capacity.

Tolerance: ±7%

TROUBLE DIAGNOSIS

Page 62

-60-

Problems Causes Checks Measures Remarks

No defrosting Melting fuse blows out. - Check melting fuse with tester. - Faullty parts: parts replacement.

1) Lead wire is cut. If 0Ω: OK. - Check wire color when maeasuring

2) Bad soldering. If ∞Ω: wire is cut. resistance with a tester.

Ice in the Sucking duct. 1. Check the inner duct with mirror. 1) Turn power off.

1) Icing by foreign materials in the 2) Raise the front side(door side),

duct. support the front side legs, and let

2) Icing by cool air inflow through the ice melt naturally. (If power is

the gap of heater plate. on, melt the frost by forced

3) Icing by the gap of heater plate. defrosting.)

2. Check by inserting soft copper 3) Reassemble the heater plate.

wire into the duct (soft and thin

copper not to impair heating wire).

Bad cool air inflow and discharge, 1. Turn on power, open or close the 1) Check the faulty connector of

and bad defrosting due to faulty door, check that motor fan housing and reassemble wrongly

contact and insertion (bad connector operates (If it operates, motor fan assembled parts.

insertion into housing of heater, is OK). 2) If the parts are very damaged,

melting, fuse and motor fan). 2. Disconnect parts in the refrigerator remove the parts and replace it

compartment, check the connection

around the housing visually,

defrost, and confirm heat generation

on the heater. Do not put hands on

the sheath heater.

3. Check the parts which have faults

described in 1, 2 (mechanical

model: disconnect thermostat

from the assembly).

with a new one.

TROUBLE DIAGNOSIS

Page 63

-61-

2-6. Icing

Problems Causes Checks Measures Remarks

Icing in the 1) Bad circulation of cool air. - Check the food is stored properly - Be acquainted with how to use. - Check the defrost

refrigerator - Clogged intake port in the (check discharge and intake port - Sealing on connecting parts. related parts if problem

compartment. refrigerator compartment. are clogged). - Check the damper and replace is caused by faulty

- Damper icing. - Sealing is not good. - Check icing on the surface of it if it has defects. defrosting.

- Pipe icing. - Too much food is stored and clogs baffle and cool air path (pipe) after - Check defrost. (After forced

- Discharging the discharge port. dissembling the container box. defrosting, check ice in the

pipe icing. - Bad defrosting. - Check icing at intake ports of evaporator and pipes.)

freezer and refrigerator

compartment.

2) Faulty door or refrigerator - Check gasket attached conditions. - Correct the gasket attachment - Replacement should

compartment. - Check door assembly conditions. conditions and replace it. be done when it

- Faulty gasket. - Door assembly and replacement. cannot be repaired.

- Faulty assembly.

3) Overcooling in the refrigerator - Check refrigerator compartment - Replace faulty parts.

compartment. is overcooled (when button

- Faulty damper in the refrigerator pressed on "weak").

compartment. - Check parts are faulty.

- Faulty MICOM (faulty sensor)

TROUBLE DIAGNOSIS

4) Bad defrosting - Check frost on the evaporator - Check parts related to defrosting. - Moisture cannot frost

- Heater wire is cut. after dissembling shroud and fan - Check defrosting. (Check ice on the on the evaporator but

- Defective defrost sensor. grille. evaporator and pipe.) can be sucked into the

- Defrosing cycle. - Check ice on intake port of freezer refrigerator, being

and refrigerator compartment. condensed and iced,

interferes with cool air

circulation, and

suppresses sublimation.

5) Customers are not familiar with - Check food interferes with door - Be acquainted with how to use.

this machine. closing.

- Door opens. - Check ice on the ceilings.

- High temperature, high moisture,

and high load.

Page 64

Problems Causes Checks Measures Remarks

Ice in the freezer 1) Bad cooling air circulation. - Check food storage conditions - Be acquainted with how to use. - Check the parts related

compartment. - Intake port is colgged in the freezer visually.(Check clogging at intake - Check defrost (Check ice on the to defrosting if the

- Surface of fan compartment. and discharging port of cooling air.) evaporator and pipes after forced problem is caused by

grille. - Discharging port is Clogged. - Check food occupation ratio in defrosting). the faulty defrosting.

- Wall of freezer - Too much food is stored. volume(Less than 75%).

compartment. - Bad defrosting. - Check frost on the evaporator after

- Cool air dissembling shroud and fan grille.

discharging port.

- Basket(rack) refrigerator compartment.

area.

- Food surface. 2) Bad freezer compartment door - Check gasket attachment - Correct the gasket attachement - Replace when it can not

- Icing in the - Faulty gasket conditions. conditions and replace it. be repaired.

shute. - Faulty assembly - Check door assembly conditions. - Door assembly and replacement.

- Check icing at intake port of

TROUBLE DIAGNOSIS

-62-

3) Over freezing in the freezer - Refrigerator operates pull down. -Replace defective parts.

compartment. (Check if it is operated

- Faulty MICOM. intermittently)

- The Temperature of freezer

compartment is satisfactory, but

over freezing happens in the

refrigerator compartment even

though the notch is set at "weak".

4) Bad defrosting. - Check frost on the evaporator after - Check parts related to defrosting.

- Heater wire is cut. dissembling shroud and grille. - Check defrosting.(Check ice on the

- Faulty defrost sensor. - Check ice on the intake port in the evaporator and pipes after forced

- Defrosting cycle refrigerator compartment. defrosting.)

5) User is not familiar with how to - Check food holds door open. - Be acquainted with how to use.

use. - Check ice on the ice tray.

- Door opens.

- High moisture food(water) is stored.

Page 65

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2-7. Sound

Problems Causes Checks Measures Remarks

"Whizz" sound 1. Loud sound of compressor 1.1 Check the level of the 1) Maintain horizontal level.

operation. refrigerator. 2) Replace rubber and seat if they

1.2 Check the rubber seat are sagged and aged.

conditions (sagging and aging). 3) Insert rubber where hand contact

reduces noise in the pipe.

2. Pipes resonat sound which is 2.1 Check the level of pipes 4) Avoid pipe interference.

connected to the compressor. connected to the compressor 5) Replace defective fan and fan

and their interference. motor.

2.2 Check rubber inserting 6) Adjust fan to be in the center of

conditions in pipes. bell mouth of the fan guide.

2.3 Touch pipes with hands or screw 7) Leve a clearance between

-driver (check the change of interfering parts and seal gaps in

sound). the structures.

8) Reassemble the parts which make

3. Fan operation sound in the freezer 3.1 Check fan insertion depth and sound.

compartment. blade damage. 9) Leave a clearance if evaporator

3.2 Check the interference with pipes and suction pipe touch

structures. freezer shroud.

3.3 Check fan motor.

3.4 Check fan motor rubber insertion

and aging conditions.

TROUBLE DIAGNOSIS

4. Fan operation sound in the 4.1 Same as fan confirmation in the

compressor compartment. refrigerator.

4.2 Check drip tray leg insertion.

4.3 Check the screw fastening

conditions at condenser and

drip tray.

Page 66

-64-

TROUBLE DIAGNOSIS

Problems Causes Checks Measures Remarks

Vibration sound. 1. Vibration of shelves and foods in 1-1. Remove and replace the 1) Reassemble the vibrating parts

("Cluck") the refrigerator. shelves in the refrigerator and insert foam or cushion where

2. Pipes interference and capillary 1-2. Check light food and container vibration is severe.

tube touching in the compressor. on the shelves. 2) Leave a clearance where parts

compartment. 2-1. Touch pipes in the compressore interfere with each other.

3. Compressor stopper vibration. compartment with hands. 3) Reduce vibration with rubber

4. Moving wheel vibration. 2-2 Check capillary tube touches and restrainer if it is severe.

5. Other structure and parts cover back. (especially, compressor and pipe).

vibration. 3-1 Check compressor stopper 4) Replace compressor stopper if it

vibration. vibtates severely.

4-1 Check vibration of front and rear

moving wheels.

5-1 Touch other structures and parts.

Irregular sound. 1. It is caused by heat expansion 1-1 Check time and place of sound 1)

("Click"). and contraction of evaporator, sources.

shelves, and pipes in the

refrigerator.

Explain the principles of refrigeration

and that the temperature difference

between operation and defrosting

can make sounds.

If evaporator pipe contacts with other

structures, leave a clearance between

them (freezer shroud or inner case).

Page 67

Problems Causes Checks Measures Remarks

TROUBLE DIAGNOSIS

-65-

Sound "Burping" It happens when refrigerant expands

(almost the same at the end of capillary tube. initial installation. evaporator and capillary tube weld

as animals crying - Check the sound when the refrigerator joints and attach another restrainer.

sound). starts operation after forced defrosting. - If it is continuous and servere, insert

Water boiling or It happens when refrigerant passes - Check the sound when compressor is - Explain the principles of freezing cycles

flowing sound. orifice in accumulator internal pipes by turned on. and refrigerant flowing phenomenon by

the pressure difference between - Check the sound when compressor is internal pressure difference.

condenser and evaporator. turned off. - If sound is servere, wrap the

Sound of whistle When door closes, the internal pressure - Check the sound by opening and - Broaden the cap of discharge hose for

when door of the refrigerator decreases sharply closing the refrigerator or freezer doors. defrosting in the compressor

closes. below atomosphere and sucks air into compartment.

the refrigerator, making the whistle - Seal the gap with sealant between out

sound. and inner cases of hinge in door.

- Check the sound of refrigerant at the - Check the restrainer attached on the

- Check the restrainer attachment capillary tube again (depth:15±3mm)

conditions on the evaporator and - Fasten the capillary tube to suction

capillary tube weld joints. pipes or detach in the compressor

compartment.

- Explain the principles of freezing

cycles.

accumulator with foam and restrainer.

Page 68

-66-

2-8. Odor

Problems Causes Checks Measures Remarks

Food Odor. Food (garlic, kimchi, etc) - Check the food is not wrapped. - Dry deodorizer in the shiny and

- Check the shelves or inner windy place.

wall are stained with food juice. - Store the food in the closed

- Check the food in the vinyl wraps. container instead of vinyl wraps.

- Chedk food cleanliness. - Clean the refrigerator and set

button at "strong".

Plastic Odor. Odors of mixed food and plastic - Check wet food is wrapped with - Clean the refrigerator.

odors. plastic bowl and bag. - Persuade customers not to use

- It happens in the new refrigerator. plastic bag or wraps with wet food

or odorous foods.

Odor from the Odor from the old deodorizer. - Check the deodorizer odors. - Dry the deodorizer with dryer and *Deodorizer : option

deodorizer. then in the shiny and windy place.

- Remove and replace the

deodorants.

TROUBLE DIAGNOSIS

Page 69

-67-

2-9. Micom

Problems Symptom Causes Checks Measures Remarks

Bad PCB All display Bad connection Bad connector Visual check on connector Reconnect

electric power. LCD are off. between Main PCB connection from main connection. connector.

and display circuit. PCB to display PCB.

Defective PCB trans. PCB Trans winding is Check resistance of PCB Trans Replace PCB Trans Applicable to

cut. input and output terminals with or PCB. model without

PCB Trans temperature a tester. (If resistance is infinity, dispenser.

fuse is burnt out. trans winding is cut).

DefectivePCB electric Defective regulator IC Check voltage at input/output Replace regulator. Refer to electric

circuit parts. (7812, 7805). terminals. circuit in circuit

explanation.

PCB electric terminal Check fuse in PCB electric Replace PCB fuse.

fuse is burnt out. terminal with a tester.

STR Parts are Check if STR No. 2 and 3 pins Replace parts. Applicable to

damaged. are cut when power is off. model with

dispenser.

TROUBLE DIAGNOSIS

Abnormal Bad connection Lead Wire connecting Check Lead Wire terminals Reconnect Lead

display LCD between Main PCB main PCB and display connecting Main PCB and Wire and directly

operation and display circuit. PCB is cut or connector display PCB with a tester. connect defective

terminal connection is contact terminal to

bad. Lead Wire.

Defective LCD. Defective LCD. Check if all LCD are on when Replace display Refer to display

Main PCB Test switch is PCB. circuit in circuit

pressed (or when both freezer explanation.

key and power freezer key are

pressed at the same time for

more than one second.)

Page 70

-68-

Problems Symptom Causes Checks Measures Remarks

Bad cooling. Freezer Compressor does Compressor Lead Wire Check compressor Lead Wire Reconnect Lead

temperature is not start. is cut. with a tester. Wire.

high. Defective compressor Measure voltage at PCB CON2 Replace relay(RY1 Refer to load

driving relay. (3&9) after pressing main PCB and RY2) or PCB. driving circuit in

test switch once. It is OK if circuit

voltage is normal. explanation.

Defective freezer Defective Freezer Check resistance of freezer Replace freezer Refer to

sensor. sensor parts. sensor with a tester. sensor. resistance

characteristics

table of sensor in

circuit

Freezer sensor is Confirm the color of sensor in Repair main PCB explanation.

substituted for other circuits (main PCB sensor sensor housing

sensor. housing).

Defective freezer fan Fan motor lead wire Check fan motor lead wire Reconnect lead

motor. is cut. with a tester. wire.

• Defective door switch Measure the voltage between • Replace door Refer to load

(freezer, refrigerator, PCB power blue line and fan switch

home bar). motor after pressing test switch

• Defective fan motor. of Main PCB. If the voltage is home bar). explanation.

• Defective fan motor normal, it is OK. • Replace fan motor.

driving relay.

(freezer,

refrigerator

and circuit

driving circuits in

TROUBLE DIAGNOSIS

Faulty defrost. Refer to faulty defrost items in trouble diagnosis Refer to trouble

functions. diagnosis

function.

Page 71

-69-

Problems Symptom Causes Checks Measures Remarks

Bad cooling Wrong Defective Step Motor Check Step Motor Check if Step Motor damper Reconnect lead

Refrigerator Damper. damper motor and motor and reed switch lead wire.

temperature. reed switch and lead wire are cut with a tester.

wire are cut. Check Refer to Step Motor damper Replace Step Motor

Step Motor damper in parts repair guide. damperor refrigerator

part.

Check Step Motor Refer to Step Motor damper Replace relay or Refer to single

damper Motor driving in parts repair guide. PCB. motor damper

relay in PCB. driving circuits

Foreign materials in Step

Motor damper baffles. baffle visually. materials.

Ice formation on Check if Step Motor damper Replace Step Motor

Step Motor damper Heater wire is cut with a

baffles. tester. control Box Assembly.

Defective refrigerator Defective refrigerator Check the resistance of Replace refrigerator Refer to sensor

sensor sensor parts. refrigerator sensor with a tester. sensor. resistance

Refrigerator sensor is Check the sensor color in the Repair main PCB

substituted for other circuit. (main PCB sensor sensor housing.

sensor. housing.)

Defective refrigerator Check if refrigerator sensor Fix again the

sensor assembly is not fixed at cover sensor but refrigerator sensor.

condition. inner case visually.

Check Step Motor damper Remove foreign

control box Assembly.

in circuit

explanation.

damper or refrigerator

characteristic

table in circuit

explanation.

TROUBLE DIAGNOSIS

Page 72

-70-

TROUBLE DIAGNOSIS

Problems Symptom Causes Checks Measures Remarks

Bad defrost. Defrost is not Defrost lead wire is cut. Check if defrost lead wire is cut with a Reconnect Lead

working. tester. Wire.

Defective defrost driving relay. Check the voltage of CON2 (1 and 7) Replace relay (RY 7 Refer to load

with a tester after pressing main and RY 3) or PCB. driving conditions

PCB test switch twice. check in circuit

If the voltage is normal then it is OK. explanation.

Defective defrost sensor parts. Check the resistance of defrost sensor Replace defrost Refer to sensor

with a tester. sensor. resistance

characteristic

table of circuit

explanation.

Defective Buzzer Defective connecting lead wire from Check lead wire related to door Repair lead wire.

buzzer continuously main PCB to door switch. switch with a tester.

rings or door Defective door switch parts. Refer to door switch in parts repair Replace door switch.

opening alarm guide.

does not work.

Defective Buzzer does Key input wire is cut or bad connector Check input wire with a tester. Reconnect lead Refer to display

display button not ring and terminal contact in main PCB and wire and replace or circuit in circuit

key does not display PCB connecting lead wire. directly connect bad explanation.

sense even contact terminal to

button is lead wire.

pressed.

Key is continuously depressed due to Disassemble frame display and confirm Adjust or replace

structural interference. visually. interfering

structures.

Page 73

-71-

TROUBLE DIAGNOSIS

Problems Symptom Causes Checks Measures Remarks

Defective Buzzer rings Trouble mode indication. Check trouble diagnosis function. Repair troubles Refer to mode

display button. but key does indication in

not sense even function

button is explanations.

pressed.

Door Buzzer Buzzer Defective connecting lead wire from Check lead wire associated with door Repair lead wire. Check model

continuously main PCB to door switch. switch. with dispenser.

rings or door Defective freezer compartment door Refer to door switch in parts repair Replace Freezer

opening alarm switch parts. guide. compartment door

does not work. switch.

Bad water/ice Ice and water Defective connecting lead wire from Check Lead Wire associated with lever Repair lead wire.

dispenser. are not Main PCB to lever switch. switch with a tester.

dispensed. Defective lever switch parts Refer to door switch in parts repair guide. Replace lever switch.

Defective photo coupler IC parts. Check voltage change at photo coupler Replace photo

output terminals with lever switch coupler IC or PCB.

pressed. It is OK if voltage change is

between 0V - 5V.

Defective relay associated with ice Check relay (RY4, RY5, RY12) Replace defective

dispense (geared motor, cube and with a tester. relay.

dispenser solenoid).

Defective parts associated with ice Check resistance of parts with a tester. Replace defective

dispense (geared motor, cube and parts.

dispenser solenoid).

Defective relay associated with water Check relay (RY7) with a tester Replace defective

dispense. relay.

Defective parts associated with water Check resistance of parts with a tester. Replace defective

dispenser. parts.

Page 74

TROUBLE DIAGNOSIS

3. Cooling Cycle Heavy Repair

3-1. The Heavy Repair Standards for Refrigerator with R134a Refrigerant

NO. Items Unit Standards Purposes Remarks

1 Pipe and piping Min. Pipe:within 1 hour. To protect The opening time should be reduced to a

system opening time. Comp:within Moisture half of the standards during rain and

2 Welding. Nitrogen Weld under To protect - Refet to repair note in each part.

2 sealed parts. Confirm N2 Confirm air leaking To protect - In case of evaporator parts, if it doesn't

Refrigeration

Cycle. time 40 minutes. moisture.

5 Refrigerant weighing. EA Use R134a Do not mix - Do not weight the refrigerant at too hot or

6 Drier replacement. -

7 Leak check. -Do not use soapy Detect -Check oil leak at refrigerant leak area.

Evacuation

Vacuum Torr Below 0.03(ref) Note:Only applicable to the model

degree equipped with reverse flow protect

Vacuum EA High and low Vaccum efficiency can be improved by

Vacuum EA Use R134a To protect The rubber pipes for R12 refrigerant shall

piping exclusive mixing of be melted when they are used for R134a

Pipe EA Use R134a To protect

coupler cxclusive. R12 Refri-

Outlet R134a exclusive.

(Socket)

Plug R134a exclusive

Pressure. Nitrogen oxide scale - R134a refrigerant is more susceptible to

leak. sounds when moisture noise when removing rubber cap blow

Min. More than To remove

10 minutes. Penetration. rainy seasons (the penetration of water

Drier:within into the pipe is dangerous).

20 minutes.

atmosphere formation. leaks than R12 and requires more care (N

2 pressure: during welding.

0.1~0.2 kg/cm

removing rubber penetration. dry air or N cap. use the parts. Sound:usable No sound:

Pressure sides are operating compressor during evacuation. evacuated at the same time for models above 200

manifold. mineral and refrigerant(causes of leak).

exclusively. with R12 too cold an area.(25°C is adequate.) Weighing refrigerant. - Use copper bombe allowance:±5g Socket:2SV Plug: 2PV R134a Note:Winter:-5g Note:Do not burn O-ring (rubber) during

Summer:+5g welding.

Use R134a exclusively for R134a refrigerator

Use R12 exclusively for R12 refrigerator

Replace drier whenever repairing refrigerator cycle piping.

water for check. refrigerant Use electronic leak detector if oil leak is it may be sucked leak area. not found. into the pipe by. -The electronic leak detector is very

) - Do not apply force to pipes before and

not usable

ester oils.

gerant mixing.

To remove

the moisture

from pipe.

after welding to protect pipe from cracking.

2 gas for more than 1 min

plate.

sensitive to halogen gas in the air. It also can detect R141b in urethane. Please practice, therfore, many times before use.

NOTE) Please contact Songso company on +82-53-554-2067 if you have inquiry on heavy repair special facility.

- 72 -

Page 75

TROUBLE DIAGNOSIS

3-2. Summary Of Heavy Repair

Process Contents Tools

Trouble

diagnosis

Remove refrigerant

Residuals

Parts

replacement

and welding

Vacuum

Refrigerant

charging and

charging

inlet welding

- Cut charging pipe ends and discharge refrigerant from Filter, side cutters

drier and compressor.

- Use R134a oil and refrigerant for compressor and drier Pipe Cutter, Gas welder, N

- Confirm N

Use good one for welding and assembly.

- Weld under nitrogen gas atmosphere.(N

0.1-0.2kg/cm

- Repair in a clean and dry place.

- Evacuate for more than forty minutes after connecting Vacuum pump(R134a

manifold gauge hose and vacuum pump to high (drier) exclusively), Manifold gauge.

and low (compressor refrigerant discharging parts)

pressure sides.

- Evacuation Speed:113l/min.

- Weigh and control the allowance of R134a bombe in a R134a exclusive bombe(mass

vacuum conditions to be ±5 g with electronic scales and cylinder), refrigerant(R134a)

charge through compressor inlet manifold gauge, electronic

(Charge while refrigerator operates). scales, punching off flier,

- Weld carefully after inlet pinching. gas welding machine

2 sealing and packing conditions before use.

2 gas pressure:

2 gas

Check

refrigerant leak

and cooling

capacity

Compressor

compartment

and tools

arrangement

Transportation

and

installation

- Check leak at weld joints. Electronic Leak Detector,

Minute leak: Use electronic leak detector Driver(Ruler).

Big leak: Check visually or fingers.

Note:Do not use soapy water for check.

- Check cooling capacity

➀ Check radiator manually to see if warm.

➁ Check hot line pipe manually to see if warm.

➂ Check frost formation on the whole surface of the

evaporator.

- Remove flux from the silver weld joints with soft brush Copper brush, Rag, Tool box

or wet rag.(Flux may be the cause of corrosion and

leaks.)

- Clean R134a exclusive tools and store them in a clean

tool box or in their place.

- Installation should be conducted in accordance with the

standard installation procedure.(Leave space of more

than 5 cm from the wall for compressor compartment

cooling fan mounted model.)

- 73 -

Page 76

TROUBLE DIAGNOSIS

3-3. Precautions During Heavy Repair

Items Precautions

1. Use of tools. 1) Use special parts and tools for R134a.

2. Removal of retained 1) Remove retained refrigerant more than 5 minutes after turning off a refrigerator.

refrigerant. (If not, oil will leak inside.)

2) Remove retained refrigerant by cutting first high pressure side (drier part) with a nipper and

then cut low pressure side. (If the order is not observed, oil leak will happen.)

Evaporator

Compressor

Drier

Low pressure side

3. Replacement of drier. 1) Be sure to replace drier with R134a only when repairing pipes and injecting refrigerant.

4. Nitrogen blowing 1) Weld under nitrogen atmosphere in order to prevent oxidation inside a pipe.

welding. (Nitrogen pressure : 0.1~0.2 kg/cm

5. Others. 1) Nitrogen or refrigerant R134a only should be used when cleaning inside of cycle pipes

inside and sealing.

2) Check leakage with an electronic leakage tester.

3) Be sure to use a pipe cutter when cutting pipes.

4) Be careful not the water let intrude into the inside of the cycle.

Condenser

High pressure side

- 74 -

Page 77

TROUBLE DIAGNOSIS

Compressor

Low pressure side

Condenser

High pressure side

Drier

Evaporator

Release

Refrigent

Intake

Suction

1 2 1

Evaporator

Drier

High pressure side

Condenser

Refrigent

Intake

-0

Filter

* Unit : mm

3-4. Practical Work For Heavy Repair

Items Precautions

1. Removal of residual

refrigerant.

1) Remove residual refrigerant more than 5 minutes later after turning off the refrigerator.

( If not, compressor oil may leak inside.)

2) Remove retained refrigerant slowly by cutting first high pressure side (drier part) with a

nipper and then cut low pressure side.

2. Nitrogen blowing

welding.

KEYPOINTING

Observe the sequence for removal of refrigerant. (If not, compressor oil may leak.)

KEYPOINTING

Welding without nitrogen blowing produces oxidized scales inside a pipe, which affect on performance and reliability of a product.

3. Replacement of drier.

When replacing a drier:

Weld  and  parts by blowing nitrogen(0.1~0.2kg/cm

) to high pressure side after

assembling a drier.

When replacing a compressor:

Weld  and  parts by blowing nitrogen to the low pressure side.

Note) For other parts, nitrogen blowing is not necessary because it does not produce oxidized

scales inside pipe because of its short welding time.

KEYPOINTING

Be sure to check the inserted length of capillary tube when it is inserted. (If too much inserted, a capillary tube is clogged by a filter.)

Inserting a capillary tube

Measure distance with a ruler and put a mark(12

mark, and weld it

- 75 -

+3/-0

)on the capillary tube. Insert tube to the

Page 78

TROUBLE DIAGNOSIS

Items Precautions

4.Vacuum degassing.

Blue

Evaporator

Drier

2 1

Low

pressure

Yellow

Compressor

Suction pipe

Condenser

Vaccum

Pump

Pipe Connection

Connect a red hose to the high pressure side and a blue hose to the

low pressure side.

Vacuum Sequence

Open ,  valves and evacuate for 40 minutes. Close valve .

High

pressure

Red

KEYPOINTING

- If power is applied during vacuum degassing, vacuum degassing shall be more effective.

- Operate compressor while charging refrigerant. (It is easier and more certain to do like this.)

5.Refrigerant charging.

Charging sequence

1) Check the amount of refrigerant supplied to each model after completing vacuum

degassing.

2) Evacuate bombe with a vacuum pump.

3) Measure the amount of refrigerant charged.

- Measure the weight of an evacuated bombe with an electronic scale.

- Charge refrigerant into a bombe and measure the weight. Calculate the weight of

refrigerant charged into the bombe by subtracting the weight of an evacuated bombe.

Indicate the weight of an evacuated bombe

KEYPOINTING

- Be sure to charge the refrigerant at

R134a

around 25°C.

- Be sure to keep -5g in the winer and +5g in summer

Calculation of amount of refrigerant charged

the amount of refrigerant charged= a weight after charging a weight before charging (a weight of an evacuated cylinder)

- 76 -

Page 79

TROUBLE DIAGNOSIS

Items Precautions

Evaporator

Compressor

Drier

Condenser

Bombe

4) Refrigerant Charging

Charge refrigerant while operating a compressor as shown above.

5) Pinch a charging pipe with a pinch-off plier after completion of charging.

6) Braze the end of a pinched charging pipe with copper brazer and take a gas leakage test

on the welded parts.

6. Gas-leakage test * Take a leakage test on the welded or suspicious area with an electronic leakage tester.

7. Pipe arrangement Check each pipe is placed in its original

in each cycle place before closing a cover back-M/C

after completion of work. Particularly

control the size of Joint Drain Pipe

3-5. Standard Regulations For Heavy Repair

1) Observe the safety precautions for gas handling.

2) Use JIG (or wet towel) in order to prevent electric wires from burning during welding. (In order to prevent insulation break and accident.)

3) The inner case shall be melted and insulation material (polyurethane) shall be burnt if not cared during welding inner case parts.

4) The copper pipe shall be oxidized by overheating if not cared during welding.

5) Not allow the aluminum pipes to contact to copper pipes. (In order to prevent corrosion.)

6) Observe that the inserted length of a capillary tube into a drier should be 12 mm.

Molecular Sieves

-0

12 mm

7) Make sure that the inner diameter should not be distorted while cutting a capillary tube.

8) Be sure that a suction pipe and a filling tube should not be substituted each other during welding. ( High efficiency pump.)

Drier

-0

Molecular Pipe

- 77 -

Page 80

TROUBLE DIAGNOSIS

PIPE ASSEMBLY

JOINT

PIPE ASSEMBLY HOT LINE

(Refrigerator)

PIPE ASSEMBLY HOT LINE

(Freezer)

PIPE ASSEMBLY

JOINT

CONDENSER

ASSEMBLY WIRE

PIPE ASSEMBLY

SUCTION

DRIER ASSEMBLYCAPI - TUBE

Copper Brazer

Copper(Silver)

Brazer

Silver Brazer

Copper Brazer

Coppper Brazer

Silver Brazer

Copper(Silver) Brazer

PIPE ASSEMBLY

JOINT

PIPE ASSEMBLY HOT LINE

(Freezer)

PIPE ASSEMBLY

JOINT

CONDENSER

ASSEMBLY WIRE

PIPE ASSEMBLY

SUCTION

DRIER ASSEMBLYCAPI - TUBE

Copper Brazer

Copper(Silver)

Brazer

Silver Brazer

Copper Brazer

Coppper Brazer

Silver Brazer

3-6. Brazing Reference Drawings

1) Asia / Middle-East Africa

2) Europe & CIS / America

- 78 -

Page 81

TROUBLE DIAGNOSIS

4. HOW TO DEAL WITH CLAIMS

4-1. Sound

Problems Checks and Measures

"Whizz" sounds ■ Explain general principles of sounds.

• All refrigerator when functioning properly have normal operating sound. The compressor and fan produce sounds. There is a fan in the freezer compartment which blows cool air to freezer and refrigerator compartments. "Whizz" sounds are heard when the air passes through the narrow holes into the freezer and refrigerator compartments.

■ Cooling Fan sound in the compressor compartment.

• There is a fan on the back of the refrigerator, which cools the compressor compartment. If there is a small space between the refrigerator and the wall, the air circulation sounds may be noticeable.

■ Noise of Compressor.

• This operating sound happens when the compressor compresses the refrigerant. The compressor rotates at 3600RPM. The sound of compressor operation becomes louder as the refrigerator capacity increases.

"Click" sounds ■ Explain the principles of temperature change.

• The sounds happens when pipes and internal evaporator in the refrigerator compartment expand and contract as the temperature changes during the refrigerator operation. This sound also happens during defrosting, twice a day, when the ice on the evaporator melts.

"Clunk" sound ■ Explain that it comes from the compressor when the refrigerator starts.

• When the refrigerator operates, the piston and motor in the compressor rotate at 3600RPM. This sound is caused by the vibration of motor and piston when they start and finish their operation. This phenomena can be compared with that of cars. When the car engine ignites and starts to rotate, the loud sound becomes gradually quiet. When the engine stops, it stops with vibration.

Vibration sound ■ Check the sound whether it comes from the pipes vibration and friction.

• Insert rubber or leave a space between pipes to avoid the noise.

• Fix the fan blade if the noise is due to the collision of fan and shroud.

• Fix the drip tray if it is loosened.

■ Sound depends on the installation location.

• Sound becomes louder if the refrigerator is installed on a wooden floor or near a wooden wall. Move it to the another location.

• If the refrigerator is not leveled properly, a small vibration can make a loud sound. Please adjust the level of the refrigerator.

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Page 82

TROUBLE DIAGNOSIS

Problems Checks and Measures

Sounds of water flowing ■ Explain the flow of refrigerant.

• When the refrigerator stops, the water flowing sound happens. This sound happens when the liquid or vapor refrigerant flows from the evaporator to compressor.

"Click" sounds ■ Explain the characteriistics of moving parts.

• This noise comes from the MICOM controller's switch on the top of the refrigerator when it is turned on and off.

Noise of ice maker operation ■ Explain the procedure and principles of ice maker operation. (applicable to model with ice maker). • Automatic ice maker repeats the cycle of water supplying ➝ icemaking ➝ ice

- Noise produced by ice dropping ejection. When water is supplied, the water supply valve in the machine room and hitting ice bank. makes sounds like “Whizz” and water flowing also makes sound. When water

- Noise from motor sounds “Whizz”. freezes to ice, freezing sounds such as “click, click” are heard. When ice is

being ejected, sounds like “Whizz” produced by a motor to rotate an ice tray and ice dropping and hitting ice bank sounds are also heard.

Noise when supplying water. ■ Explain the principles of water supplied to dispenser.

• When the water supply button in the dispenser is pressed, the water supply valve in the compressor compartment opens and let the water flow to the water tank in the lower part of the refrigerator compartment. The water is dispensed by this pressure. When this happens, motor sound and water flowing sound are heard.

Noise when supplying ice. ■ Explain the principles of ice supply and procedure of crushed ice making in a

dispenser.

• When ice cube button is pressed, ice stored in the ice bank is moved by a Helix Pusher and dispensed. If crushed ice button is pressed, the cube ice is crushed. When this happens, ice crushing and hitting ice bank sounds are heard.

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Page 83

TROUBLE DIAGNOSIS

4-2. Measures for Symptoms on Temperature

Problems Checks and Measures

Refrigeration is weak. ■ Check temperature set in the temperature control knob.

• Refrigerator is generally delivered with the button set at “normal use” (MID). But customer can adjust the temperature set depending on their habit and taste. If you feel the refrigeration is weak, then set the temperature control button at “strong” position. If you adjust the button in the freezer compartment as well, the refrigeration is stronger than adjusting refrigerator only.

The food in the chilled drawer is . ■ The chilled drawer does not freeze food. not frozen but defrosted • Use chilled drawer for storing fresh meat or fish for short periods. For storing for

a long periods or freezing food, use a freezer compartment. It is normal that frozen foods thaw above the freezing temperature (in the chilled drawer).

Refrigerator water is not cool. ■ Check the water storage location.

• If water is kept in the door rack, please ask to keep it in the refrigerator compartment shelf. It will then become cooler.

Ice cream softens. ■ Explain the characteristics of ice cream.

• The freezing point of ice cream is below -15°C. Therefore ice cream may melt if it is stored in the door rack.

• Store ice cream in a cold place or set the temperature control button of a freezer at “strong” position.

Refrigeration is too strong. ■ Check the position of temperature control button.

• Check if refrigeration is strong in whole area of the refrigerator or partly near the outlet of the cooling air. If it is strong in whole area, set the control button at “weak”. If it is strong only near the outlet of cool air, keep food (particularly wet and easy to frozen such as bean curd and vegetables) away from the outlet.

Vegetables are frozen. ■ Check the vegetables storage.

• If vegetables are stored in the refrigerator shelf or chilled drawer instead of vegetable drawer, they will be frozen. Set the control button at “weak” if they are also frozen in the vegetable drawer.

The food stored at inside of ■ Check if food is stored near the outlet of the cooling air. the shelf freezes even the • The temperature at cooling air outlet is always below the freezing point. control button is set at “MID”. Do not store food near the outlet of the cooling air as it block the air circulation.

And do not block the outlet. If the outlet of the cooling air is blocked, the refrigerator compartment will not be cooled.

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Page 84

TROUBLE DIAGNOSIS

4-3. Odor and Frost

Problems Checks and Measures

Odor in the refrigerator compartment.

Frost in the freezer compartment ■ Explain the basic principles of frost formation.

■ Explain the basic principles of food odor.

• Each food has its own peculiar odor. Therefore it is impossible to prevent or avoid food odor completely when food is stored in the completely sealed refrigerator compartment. Deodorizer can absorb some portions of the odor but not completely. The intensity of odor depends on refrigerator conditions and environments.

■ Check the temperature control button and set at “strong”.

• Clean inside of the refrigerator with detergent and remove moisture. Dry inside the refrigerator by opening the door for about 3 or 4 hours and then set the temperature control button at “strong”.

• The main causes for frosting:

- Door was left open.

- Air penetration through the gasket

- Too frequent door opening. (parties. etc.)

- Hot foods are stored before they are cooled down. The temperature of freezer

is -19°C. if temperature is set at “MID”. If hot air comes into the refrigerator, fine frost forms as cold air mixes with hot air. If this happens quite often, much frost forms inside of the refrigerator. If the door is left open in Summer, ice may form inside of the refrigerator.

Frost in ice tray. ■ Explain basic principles of frost formation.

• When ice tray with full of water is put into a freezer compartment, the water evaporates. If cool air fan operates, the moisture attached to the jaw (protruded part) of ice mold shall freeze and form frost. If warm water was put into the ice mold, the situation will become worse.

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Page 85

TROUBLE DIAGNOSIS

4-5. Others

Problems Checks and Measures

The refrigerator case is hot. ■ Explain the principles of radiator.

• The radiator pipes are installed in the refrigerator case and partition plate between the refrigerator and the freezer compartment in order to prevent condensation formation. Particularly in summer or after installation of refrigerator, it may feel hot but it is normal. If there is no enough space to dissipate heat, it can be hotter due to lack of heat radiation. Please install a refrigerator in a well-ventilated place and leave a clearance between refrigerator and wall:

Small holes in a door liner ■ Explain that the hole is for releasing gas.

• A small hole in the door liner is for releasing gas during insulation materials lining work. With a releasing hole, forming can be easily done .

Electric bills are too much. ■ Check the use conditions.

• Too frequent door opening and hot food storing cause the compressor to operate continuously and hence increase the electric consumption and bills.

Condensation on the inside ■ Explain how to store foods wall of the refrigerator • Condensation forms when refrigerator is installed at damp area, door is compartment and the cover of frequently opened, and wet foods are not stored in the air tight container or properly vegetable drawer. wrapped. Be sure to store wet foods in the air tight container or in the wrap.

When is the power connected? ■ When should the power be connected ?

• You can connect the power right after the installation. But if the refrigerator was laid flat during transportation for a long period of time and the refrigerant and compressor oils are mixed up, then this will affect badly the performance of a refrigerator. Be sure to connect the power 2~3 hours after refrigerator is installed.

Door does not open properly. ■ Refrigerator compartment door does not open properly.

• When the door is open, warm open air comes into the compartment and is mixed up with cool air. This mixed air shall be compressed and increase the internal pressure when door is closed. This causes the door sticked closely to

The front side should

be raised a little bit higher

than the rear side.

the refrigerator in a moment. (If the refrigerator is used for a long time, it will then open smoothly.)

■ When the refrigerator compartment door is open and close, the freezer compartment door moves up and down.

• When the refrigerator compartment door is open and close, fresh air comes into

the freezer compartment and moves up and down the freezer compartment door.

■ Door opens too easily.

• There is a magnet in the gasket rubber so that it is ok. if door is securely closed

without a gap. It can be open easily if the foods in the refrigerator or freezer compartments hold the door open.

■ A door does not close properly.

• If the rear side of the refrigerator is raised higher than front side, door shall not

be easily closed. Adjust the level of refrigerator with levelling screws.

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Page 86

HOW TO DISASSEMBLE AND ASSEMBLE

Cover, Hinge

Connecting

Line

Earthing

Cord

Lever, Hinge

1. DOOR

1) Remove lower cover and then disconnect water supply tube in the lower part of freezer door.

• Pull a water supply tube  forward while pressing  part

to disconnect water supply tube as shown below.

2) Remove a freezer door.

(1) Loosen hinge cover screw of freezer door and remove

cover. Disconnect all connecting lines except earthing cord.

(3) Disconnect upper hinge  from a hinge supporter 

by grasping the front part of upper hinge and lifting up (Hinge Assembly, U) in arrow direction A and pull forward in arrow B direction. Be careful as the door may be fallen down.

(4) Lift up the freezer door  in arrow direction and

disconnect the door from the lower hinge . Don’t pull a door forward.

(2) Turn hinge lever in arrow A direction until it is

loosened and take it out in arrow B direction.

Note : • When disconnecting refrigerator door, turn hinge

lever counterclockwise.

• If hinge lever or bracket hinge pin is deformed during assembling freezer and refrigerator doors, fix two screws (Tap Tite Screw, M6: Hinge, L fixing screw) in the hole of upper hinge.

Note : • Lift up a freezer door until a water supply tube is

fully taken out.

(5) Assembly is the reverse order of disassembly

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Page 87

HOW TO DISASSEMBLE AND ASSEMBLE

Handle, Deco

Handle, Piece

Screw

2. HANDLE

1) Put blade screwdriver into a groove on the side of a

Deco handle and lift up a little bit in arrow  direction and push up with hand in arrow  direction and disconnect.

3. SHROUD, GRILLE FAN

1) Loosen two screws after disconnecting a cap screw of a grille fan(U) with a balde screwdriver.

2) Disassembly of a grille fan(U) : Pull forward after opening hook at ➝ part with a blade screwdriver.

3) Disconnect housing A of a grille fan (L) from the main body.

4) Disassembly of a grille fan (L) : Hold upper part of a grille fan(L) and pull forward carefully.

5) Loosen two screws.

6) Disassembly of shroud. F(U) : Disconnect housing of B after removing two rail guides with a blade screwdriver.

7) Disassembly of shroud. F(U) : Hold upper part and pull forward.

8) Check foam PU sticking conditions around a shroud, F(U) and F(L) during assembling. If damaged, torn or badly sticked, assemble with a new one after sealing well.

2) Put blade screwdriver into a groove on the side of a

DECO handle and lift up in arrow direction  and push down with hand in arrow direction  and disconnect.

3) Push up a piece handle  in arrow direction with hand

and disconnect.

4) Turn screw in arrow direction with a cross driver and disconnect.

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Page 88

HOW TO DISASSEMBLE AND ASSEMBLE

Collet

Tube

Insert Line

Clip

4. WATER VALVE DISASSEMBLY METHOD

1) Turn off the power of the refrigerator (pull out the plug).

Open the FREEZER and REFRIGERATOR Door and disassemble the Lower Cover.

2) Lay a dry towel on the floor and get ready to spill water

from the water tank. Pull out the Clip. Then press the collet to separate the tube from the connector and pour out the water until emptied. (Refer to the label attached on Front L on how to separate the tube.)

4). Separate the Mechanical Cover and Valve Screw.

Mechanical Cover

5) Separate the housing and pull out the valve.

Housing

5. FAN AND FAN MOTOR DISASSEMBLY METHOD

1) Using a short screwdriver, loosen one SCREW in

DRAIN PIPE ASSEMBLY and one connected to the MOTOR COVER.

DRAIN PIPE ASSEBLY MOTOR COVER

3) Turn off the water. Then separate the water line from the valve.

→

2) Pull and separate the FAN ASSEMBLY and MOTOR turning counterclockwise based on the MOTOR SHAFT.

FAN ASSEMBLY MOTOR

→

The assembly is in the reverse order of the disassembly and take special care for the following details.

1. Be careful not to bend the tube during assembly.

2. Press the WATER DISPENSER button until water pours out and check for leakage in the CONNECTOR TUBE (It differs by the water pressure but usually takes about 2 minutes until water pours out.)

- 86 -

Page 89

HOW TO DISASSEMBLE AND ASSEMBLE

Button

Funnel Assembly

Funnel

Assembly

Solenoid Assembly

Duct Cap

Assembly

Holder

Lever

Spring

Sheath Heater

Dispenser Lever

Solenoid Assembly

6. DISPENSER

1) Disconnect funnel and button assembly by pulling down and forward.

2) Remove display frame assembly by making a gap between a display frame assembly and door with a flat blade screwdriver and pulling it forward. The cover dispenser is attached with a hook.

4) Loosen four screws with a phillips screwdriver and pull the funnel assembly to disconnect.

5) The duct cap assembly can be disconnected if the hold lever connecting screw is loosened with a phillips driver.

3) The display assembly can be connected by pressing the top of the dispenser cover and pushing it after separating the display frame from its housing.

6) To install the duct cap assembly, insert one end of the spring into the right hole of the dispenser lever and insert the other end into the right hole in the top part of the dispenser. Then attach the holder at the solenoid switch.

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Page 90

HOW TO DISASSEMBLE AND ASSEMBLE

7) Dispenser Related Parts

FRAME ASSEMBLY, DISPLAY

2 COVER, DISPENSER

3 DECO, FRAME DISPLAY

PWB(PCB) ASSEMBLY, DISPLAY

7 FUNNEL ASSEMBLY

8 MICRO SWITCH

9 FRAME, FUNNEL

10 LEVER(SWITCH)

11 FUNNEL

12 BUTTON LEVER

13 HOLLDER BUTTON

14 SOLENOID ASSEMBLY

15 SPRING

16 LEVER HOLDER

17 CAP ASSEMBLY, DUCT

18 CAP, DUCT

19 DISPENSER LEVER

20 FOAM, NEW

21 RUBBER, CAP

22 DECO, DRAIN

NOTE : Not every model includes every option

- 88 -

Page 91

210B

202A

200A

201A

203A

611B

600A

606A

612A

614A

610A

#EV#

205A

EXPLODED VIEW

FREEZER DOOR PART: GR-P227/L227/P257/L257

- 89 -

Page 92

EXPLODED VIEW

240B

232A

264C

264A

264B

240A

233A

230A

231A

212G

243A

241B

241C

241A

243A

617A

250A

260A

240E

240D

240C

#EV#

205A

Ref No. : GR-P227/GR-P257

REFRIGERATOR DOOR PART

* : Optional part

- 90 -

Page 93

240A

232A

240A

233A

230A

239A

243A

241B

241C

241A

205F

205B

205E

205A

205C

205D

243A

240E

240D

240C

231A

#EV#

EXPLODED VIEW

Ref No. : GR-L227/GR-L257

REFRIGERATOR DOOR PART

* : Optional part

- 91 -

Page 94

EXPLODED VIEW

408A

302B

400A

270A

271B

271A

103A

312A

402A

152A

128E

128F

105B

272A

623B

621B

621A

135B

128C

128D

128C

128D

137B

136D

136A

135A

136B

403A

136C

401A

137A

130A

125A

126A

120C

120B

120D

125A

101B

#EV#

FREEZER COMPARTMENT

* : Optional part

- 92 -

Page 95

409B

167A

167C

167B

167D

168A

120E

504A

165A

166C

166A

166B

624A

624A*624A*

270B

625A

271B

271C

103A

116A

272B

151A*

626B*

626A*

626C*

101A

151B*

151C

150A

624C

401A

146A

402A

152A

162A

162B

177A

177B

115A

149E

140A

165A

166C

166A

166B

140A

#EV#

150B

115C

115B

142A

142B

142C

142D

EXPLODED VIEW

REFRIGERATOR COMPARTMENT

* : Optional part

- 93 -

Page 96

EXPLODED VIEW

300A

310B

307A

304A

306A

310A

317B

317A

313A

301A

307A

104A

303C

303B

303A

410G

410H

500A

502B

502A

308A

308C

308B

309B

403B

309C

309A

305C

305B

305C

305B

305A

406A

316A*

#EV#

MACHINE COMPARTMENT

* : Optional part

- 94 -

Page 97

ICE & WATER PART

* : Optional part

EXPLODED VIEW

- 98 -

404A

620A 620B

625A

616G

619A

616F

627A

624B

619A

404B

621B

601A

605A

602A

607A

600A

603A

603B

604A

Page 98

EXPLODED VIEW

278A

402C

405A

275A

276A

278B

278C

276B

279A

279B

281A

280C

280B

280A

501A

278D

#EV#

DISPENSER PART

* : Optional part

- 95 -

Page 99

P/No. 3828JD8999A FEB., 2006 Printed in Korea

LG Electronics GR-P227, GR-P257, GR-L227, GR-L257 User Manual

Specifications and Main Features

Frequently Asked Questions

User Manual

#EV#

#EV#

#EV#

#EV#

#EV#

#EV#