LG LRSPC2031xx Service Manual

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CAUTION

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

REFRIGERATOR

SERVICE MANUAL

Ref. No.

GR-L207ERA

MODEL: LRSPC2031BS

COLOR: EMBO BISQUE

http://biz.lgservice.com

GR-L247ERA

LRSPC2331BS

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

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

PARTS IDENTIFICATION..................................................................................................................................................... 12

HOW TO INSTALL THE REFRIGERATOR.......................................................................................................................... 18

HOW TO ADJUST DOOR HEIGHT OF THE REFRIGERATOR........................................................................................ 18

HOW TO INSTALL WATER PIPE........................................................................................................................................19

HOW TO CONTROL THE AMOUNT OF WATER SUPPLIED TO THE ICEMAKER......................................................... 23

MICOM FUNCTION .............................................................................................................................................................. 25

MICOM CIRCUIT DESCRIPTION......................................................................................................................................... 31

DESCRIPTION OF PWB CIRCUIT SENSOR RESISTANCE CHARACTERISTIC TABIE PWB PARTS DRAWING AND LIST PWB CIRCUIT DRAWING

ICE MAKER AND DISPENSER WORKING PRINCIPLES AND REPAIR...........................................................................53

WORKING PRINCIPLES FUNCTION OF ICE MAKER ICE MAKER TROUBLESHOOTING ICE MAKER CIRCUITS

CIRCUIT................................................................................................................................................................................ 58

TROUBLE DIAGNOSIS........................................................................................................................................................ 60

TROUBLE SHOOTING ......................................................................................................................................................60

FAULTS.............................................................................................................................................................................. 70

COOLING CYCLE HEAVY REPAIR................................................................................................................................... 87

HOW TO DEAL WITH CLAIMS.......................................................................................................................................... 94

HOW TO DISASSEMBLE AND ASSEMBLE....................................................................................................................... 99

DOOR................................................................................................................................................................................. 99

HANDLE........................................................................................................................................................................... 100

SHROUD, GRILLE FAN................................................................................................................................................... 100

ICEMAKER....................................................................................................................................................................... 100

DISPENSER..................................................................................................................................................................... 101

WATER TANK AND WATER LINE.................................................................................................................................... 103

HOME BAR ...................................................................................................................................................................... 103

EXPLODED VIEW .............................................................................................................................................................. 104

REPLACEMENT PARTS LIST............................................................................................................................................ 113

CONTENTS

- 2 -

Please observe the following safety precautions in order to use safely and correctly the refrigerator and to prevent accident and danger during repair.

1. Be care of an electric shock. Disconnect power cord from wall outlet and wait for more than three minutes before replacing PWB parts. Shut off the power whenever replacing and repairing electric components.

2. When connecting power cord, please wait for more than five minutes after power cord was disconnected from the wall outlet.

3. Please check if the power plug is pressed down by the refrigerator against the wall. If the power plug was damaged, it may cause fire or electric shock.

4. If the wall outlet is over loaded, it may cause fire. Please use its own individual electrical outlet for the refrigerator.

5. Please make sure the outlet is properly earthed, particularly in wet or damp area.

6. Use standard electrical components when replacing them.

7. Make sure the hook is correctly engaged. Remove dust and foreign materials from the housing and connecting parts.

8. Do not fray, damage, machine, heavily bend, pull out, or twist the power cord.

9. Please check the evidence of moisture intrusion in the electrical components. Replace the parts or mask it with insulation tapes if moisture intrusion was confirmed.

10. Do not touch the icemaker with hands or tools to confirm the operation of geared motor.

11. Do not let the customers repair, disassemble, and

reconstruct the refrigerator for themselves. It may cause accident, electric shock, or fire.

12. Do not store flammable materials such as ether, benzene, alcohol, chemicals, gas, or medicine in the refrigerator.

13. Do not put flower vase, cup, cosmetics, chemicals, etc., or container with full of water on the top of the refrigerator.

14. Do not put glass bottles with full of water into the freezer. The contents shall freeze and break the glass bottles.

15. When you scrap the refrigerator, please disconnect the door gasket first and scrap it where children are not accessible.

WARNINGS AND PRECAUTIONS FOR SAFETY

- 3 -

SPECIFICATIONS

- 4 -

ITEMS SPECIFICATIONS

DIMENSIONS (mm) 890(W)X840(D)X1750(H) NET WEIGHT (kg) 128 COOLING SYSTEM Fan Cooling TEMPERATURE CONTROL Micom Control DEFROSTING SYSTEM Full Automatic

Heater Defrost INSULATION Cyclo-Pentane COMPRESSOR P.T.C. Starting Type EVAPORATOR Fin Tube Type CONDENSER Wire Condenser REFRIGERANT R134a (185g) LUBRICATING OIL FREOL @15G (320 cc) DRIER 1Ø0.83 CAPILLARY TUBE MOLECULAR SIEVE XH-7

ITEMS SPECIFICATIONS

FIRST DEFROST 4 - 5 Hours DEFROST CYCLE 13 - 15 Hours DEFROSTING DEVICE Heater, Sheath

Heater, L - Cord

ANTI SWEAT HEATER Dispenser Duct Door Heater

Dispenser Heater Home Bar Heater

ANTI-FREEZING HEATER Water Tank Heater

Damper Heater FREEZER LAMP 40W (1 EA) REFRIGERATOR LAMP 40W (1 EA) DISPENSER LAMP 15W (1 EA)

1. Ref No. : GR-P247

948 890

1750

1720

685

745

796

840

1218.5

1750

SPECIFICATIONS

- 5 -

ITEMS SPECIFICATIONS

DIMENSIONS (mm) 890(W)X755(D)X1750(H) NET WEIGHT (kg) 123 COOLING SYSTEM Fan Cooling TEMPERATURE CONTROL Micom Control DEFROSTING SYSTEM Full Automatic

2. Ref No. : GR-P207

ITEMS SPECIFICATIONS

FIRST DEFROST 4 - 5 Hours DEFROST CYCLE 13 - 15 Hours DEFROSTING DEVICE Heater, Sheath

Heater, L - Cord

ANTI SWEAT HEATER Dispenser Duct Door Heater

Dispenser Heater Home Bar Heater

ANTI-FREEZING HEATER Water Tank Heater

Damper Heater FREEZER LAMP 40W (1 EA) REFRIGERATOR LAMP 40W (1 EA) DISPENSER LAMP 15W (1 EA)

948 890

1750

1720

600

660

711

755

1133.5

1750

SPECIFICATIONS

- 6 -

ITEMS SPECIFICATIONS

DIMENSIONS (mm) 890(W)X840(D)X1750(H) NET WEIGHT (kg) 125 COOLING SYSTEM Fan Cooling TEMPERATURE CONTROL Micom Control DEFROSTING SYSTEM Full Automatic

Heater Defrost INSULATION Cyclo-Pentane COMPRESSOR P.T.C. Starting Type EVAPORATOR Fin Tube Type CONDENSER Wire Condenser REFRIGERANT R134a (185g) LUBRICATING OIL FREOL @15G (320 cc) DRIER 1Ø0.83

ITEMS SPECIFICATIONS

CAPILLARY TUBE MOLECULAR SIEVE XH-7 FIRST DEFROST 4 - 5 Hours DEFROST CYCLE 13 - 15 Hours DEFROSTING DEVICE Heater, Sheath

Heater, L-Cord

ANTI SWEAT HEATER Dispenser Duct Door Heater

Dispenser Heater

ANTI-FREEZING HEATER Water Tank Heater

Damper Heater FREEZER LAMP 40W (1 EA) REFRIGERATOR LAMP 40W (1 EA) DISPENSER LAMP 15W (1 EA)

3. Ref No. : GR-L247

948 890

1750

1720

685

745

796

840

1218.5

1750

SPECIFICATIONS

- 7 -

ITEMS SPECIFICATIONS

DIMENSIONS (mm) 890(W)X755(D)X1750(H) NET WEIGHT (kg) 120 COOLING SYSTEM Fan Cooling TEMPERATURE CONTROL Micom Control DEFROSTING SYSTEM Full Automatic

Heater Defrost INSULATION Cyclo-Pentane COMPRESSOR P.T.C. Starting Type EVAPORATOR Fin Tube Type CONDENSER Wire Condenser REFRIGERANT R134a (185g) LUBRICATING OIL FREOL @15G (320 cc) DRIER 1Ø0.83

ITEMS SPECIFICATIONS

CAPILLARY TUBE MOLECULAR SIEVE XH-7 FIRST DEFROST 4 - 5 Hours DEFROST CYCLE 13 - 15 Hours DEFROSTING DEVICE Heater, Sheath

Heater, L-Cord

ANTI SWEAT HEATER Dispenser Duct Door Heater

Dispenser Heater

ANTI-FREEZING HEATER Water Tank Heater

Damper Heater FREEZER LAMP 40W (1 EA) REFRIGERATOR LAMP 40W (1 EA) DISPENSER LAMP 15W (1 EA)

4. Ref No. : GR-L207

948 890

1750

1720

600

660

711

755

1133.5

1750

SPECIFICATIONS

- 8 -

ITEMS SPECIFICATIONS

DIMENSIONS (mm) 890(W)X840(D)X1750(H) NET WEIGHT (kg) 117 COOLING SYSTEM Fan Cooling TEMPERATURE CONTROL Micom Control DEFROSTING SYSTEM Full Automatic

ITEMS SPECIFICATIONS

FIRST DEFROST 4 - 5 Hours DEFROST CYCLE 13 - 15 Hours DEFROSTING DEVICE Heater, Sheath

Heater, L - Cord ANTI SWEAT HEATER Home Bar Heater ANTI-FREEZING HEATER Damper Heater FREEZER LAMP 40W (1 EA) REFRIGERATOR LAMP 40W (1 EA) DISPENSER LAMP 15W (1 EA)

1. Ref No. : GR-C247

948 890

1750

1720

685

745

796

840

1218.5

1750

SPECIFICATIONS

- 9 -

ITEMS SPECIFICATIONS

DIMENSIONS (mm) 890(W)X755(D)X1750(H) NET WEIGHT (kg) 112 COOLING SYSTEM Fan Cooling TEMPERATURE CONTROL Micom Control DEFROSTING SYSTEM Full Automatic

2. Ref No. : GR-C207

ITEMS SPECIFICATIONS

FIRST DEFROST 4 - 5 Hours DEFROST CYCLE 13 - 15 Hours DEFROSTING DEVICE Heater, Sheath

Heater, L - Cord ANTI SWEAT HEATER Home Bar Heater ANTI-FREEZING HEATER Damper Heater FREEZER LAMP 40W (1 EA) REFRIGERATOR LAMP 40W (1 EA) DISPENSER LAMP 15W (1 EA)

948 890

1750

1720

600

660

711

755

1133.5

1750

SPECIFICATIONS

- 10 -

ITEMS SPECIFICATIONS

DIMENSIONS (mm) 890(W)X840(D)X1750(H) NET WEIGHT (kg) 114 COOLING SYSTEM Fan Cooling TEMPERATURE CONTROL Micom Control DEFROSTING SYSTEM Full Automatic

Heater Defrost INSULATION Cyclo-Pentane COMPRESSOR P.T.C. Starting Type EVAPORATOR Fin Tube Type CONDENSER Wire Condenser REFRIGERANT R134a (185g) LUBRICATING OIL FREOL @15G (320 cc) DRIER 1Ø0.83

ITEMS SPECIFICATIONS

CAPILLARY TUBE MOLECULAR SIEVE XH-7 FIRST DEFROST 4 - 5 Hours DEFROST CYCLE 13 - 15 Hours DEFROSTING DEVICE Heater, Sheath

Heater, L-Cord ANTI-FREEZING HEATER Damper Heater FREEZER LAMP 40W (1 EA) REFRIGERATOR LAMP 40W (1 EA) DISPENSER LAMP 15W (1 EA)

3. Ref No. : GR-B247

948 890

1750

1720

685

745

796

840

1218.5

1750

SPECIFICATIONS

- 11 -

ITEMS SPECIFICATIONS

DIMENSIONS (mm) B207 890(W)X755(D)X1750(H)

B197 890(W)

725(D)X1750(H) NET WEIGHT (kg) 109 COOLING SYSTEM Fan Cooling TEMPERATURE CONTROL Micom Control DEFROSTING SYSTEM Full Automatic

Heater Defrost INSULATION Cyclo-Pentane COMPRESSOR P.T.C. Starting Type EVAPORATOR Fin Tube Type CONDENSER Wire Condenser REFRIGERANT R134a (185g) LUBRICATING OIL FREOL @15G (320 cc) DRIER 1Ø0.83

ITEMS SPECIFICATIONS

CAPILLARY TUBE MOLECULAR SIEVE XH-7 FIRST DEFROST 4 - 5 Hours DEFROST CYCLE 13 - 15 Hours DEFROSTING DEVICE Heater, Sheath

Heater, L-Cord ANTI-FREEZING HEATER Damper Heater FREEZER LAMP 40W (1 EA) REFRIGERATOR LAMP 40W (1 EA) DISPENSER LAMP 15W (1 EA)

4. Ref No. : GR-B207 / GR-B197

948 890

1750

1720

600

660

711

755

1133.5

1750

PARTS IDENTIFICATION

- 12 -

Cover Hinge

Home Bar

Frame Display

Cover PWB

Water Tube

Dispenser Lamp

Ice & Water

Dispenser Button

Conversion Switch

(Meats/Vegetables)

Humidity Switch

Lamp

Shelf

Egg Box Snack drawer

Vegetable drawer

Vegetable drawer/Meat drawer

Door rack

Refreshment center (optional)

Shelf

Door rack Wine holder (optional)

Lamp

Shelf

Drawer

or Shelf

(optional)

Lower Cover

Milk product corner

Door rack

Drawer

Freezer

Compartment

Refrigerator

Compartment

Automatic

ice maker

Door rack

1. Ref No. : GR-P247ER, GR-P207ER

2. Ref No. : GR-P247EQ, GR-P207EQ

PARTS IDENTIFICATION

- 13 -

Cover Hinge

Home Bar

Frame Display

Cover PWB

Water Tube

Dispenser Lamp

Ice & Water

Dispenser Button

Humidity Switch

Lamp

Shelf

Egg Box Snack drawer

Vegetable drawer

Vegetable drawer/Meat drawer

Door rack

Refreshment center (optional)

Shelf

Door rack Wine holder (optional)

Lamp

Shelf

Drawer

or Shelf

(optional)

Lower Cover

Milk product corner

Door rack

Drawer

Freezer

Compartment

Refrigerator

Compartment

Automatic

ice maker

Door rack

Conversion Switch

(Meats/Vegetables)

PARTS IDENTIFICATION

- 14 -

Cover Hinge

Cover PWB

Frame Display

Water Tube

Dispenser Lamp

Ice & Water

Dispenser Button

Humidity Switch

Lamp

Shelf

Egg Box Snack drawer

Vegetable drawer

Vegetable drawer/Meat drawer

Door rack

Guide bottle

Shelf

Door rack Wine holder (optional)

Lamp

Shelf

Drawer

or Shelf

(optional)

Lower Cover

Milk product corner

Door rack

Drawer

Freezer

Compartment

Refrigerator

Compartment

Automatic

ice maker

Door rack

Conversion Switch

(Meats/Vegetables)

3. Ref No. : GR-L247ER, GR-L207ER

4. Ref No. : GR-L247EQ, GR-L207EQ

PARTS IDENTIFICATION

- 15 -

Cover Hinge

Cover PWB

Frame Display

Water Tube

Dispenser Lamp

Ice & Water

Dispenser Button

Conversion Switch

(Meats/Vegetables)

Humidity Switch

Lamp

Shelf

Egg Box Snack drawer

Vegetable drawer

Vegetable drawer/Meat drawer

Door rack

Guide bottle

Shelf

Door rack Wine holder (optional)

Lamp

Shelf

Drawer

or Shelf

(optional)

Lower Cover

Milk product corner

Door rack

Drawer

Freezer

Compartment

Refrigerator

Compartment

Automatic

ice maker

Door rack

PARTS IDENTIFICATION

- 16 -

Cover Hinge

Home Bar

Cover PWB

Conversion Switch

(Meats/Vegetables)

Humidity Switch

Lamp

Shelf

Egg Box Snack drawer

Vegetable drawer

Vegetable drawer/Meat drawer

Door rack

Refreshment center (optional)

Shelf

Door rack Wine holder (optional)

Lamp

Shelf

Drawer

or Shelf

(optional)

Lower Cover

Milk product corner

Door rack

Drawer

Freezer

Compartment

Refrigerator

Compartment

Door rack

1. Ref No. : GR-C247EC, GR-C207EC

PARTS IDENTIFICATION

- 17 -

Cover Hinge

Cover PWB

Conversion Switch

(Meats/Vegetables)

Humidity Switch

Lamp

Shelf

Egg Box Snack drawer

Vegetable drawer

Vegetable drawer/Meat drawer

Door rack

Shelf

Door rack Wine holder (optional)

Lamp

Shelf

Drawer

or Shelf

(optional)

Lower Cover

Milk product corner

Door rack

Drawer

Freezer

Compartment

Refrigerator

Compartment

Door rack

3. Ref No. : GR-B247, GR-B207, GR-B197

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

B into the groove A of adjusting screw and rotate driver in arrow direction (clockwise) until the refrigerator becomes horizontal.

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

HOW TO INSTALL REFRIGERATOR

- 18 -

Adjusting Screw

Driver

Height

Difference

Height Difference

2. How to Install Water Pipe

■ Before Installation

1. The icemaker requires the water pressure of 1.5 -

8.5kgf/cm

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

180cc with water for 3 seconds)

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

for normal operation of water and ice

dispenser.

3. The total length of water pipe shall be less than 12m. Do not bend the pipe at right angle. If the length is more than 12m, there will be troubles on water supply due to water pressure drop.

4. Please install water pipe where there is no heat around.

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

■ Please confirm the following installation parts.

HOW TO INSTALL REFRIGERATOR

- 19 -

Class. Shape and Spec. Nomenclature P/No Remarks

Valve Feed 5221JA3001A Common Use

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

No Holes

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

Connector, (MECH) Pipe 4932JA3003B

Conversion Connector(W25) 6631JA3004C

No Holes

Balance Conectoor(W25) 6631JA3004D Packing(ø23x3t) 3920JA3001A

Connector, (MECH) Pipe 4932JA3003C Conversion Connector(W28) 6631JA3004E

No Holes

Balance Conector(W28) 6631JA3004F Packing(ø26x3t) 3920JA3001C

Connector, (MECH) Pipe 4932JA3003D Conversion Connector(1/2") 6631JA3004G No Holes Balance Conector(1/2") 6631JA3004H Packing(ø19x3t) 3920JA3001D

Convertible Water Valve

Water Connector

Valve Feed Rubber, Packing Connector, Pipe

Tape, TeflonConnector, Pipe

1. Connection of Pipe Connector A and B.

1) Turn off main valve of water pipe.

2) Disconnect water tap from piping by loosening nuts.

3) Connect pipe connector A and B to piping after sealing the pipe connector with sealing tapes.

4) Connect feed valve to pipe connector A.

5) If there is only one tap water pipe, connect pipe connector A only and install feed pipe.

2. Water Supply

1) After the installation of feed water, plug the refrigerator to the earthered wall outlet, press the water dispenser button for 2 - 3 minutes, and confirm that the water comes out.

Caution : • Feed pipe should be connected to cold water

line. If it is connected to hot water line, trouble may occur.

• Please check rubber packing when connecting feed pipe.

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

HOW TO INSTALL REFRIGERATOR

- 20 -

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

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

2) Fix the filter at proper place around the sink where it is easy to replace the filter and to receive the cleaning water. Please consider the length of tube shall be less than 12m when locating filter.

3) When fixing the filter, use fixing plate and cable depending on the surrounding conditions.

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.

HOW TO INSTALL REFRIGERATOR

- 21 -

Water Tube

Nut

Inlet

Outlet

Fixing Plate Fixing Plate

Fixing Cable

Water

Filter

Filter Inlet

Feed Valve

Hot Water

Cold Water

■ 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 (a) and lifting it to the direction (b) and move it to the lower part.

2. Remove the lamp cover by pressing the protrusion under the cover and pulling the cover to the front.

■ Installing water filter

1. Initial installation of water filter Remove the filter substitute cap by turning it counterclockwise (a) 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 (a) after aligning with the guideline marked on the control box, and fasten it by turning it clockwise by 90 degrees.

Note : Check that the guideline and the fastening

indication line are aligned.

2. Replacement of water filter While holding the lower part of the filter, turn it counterclockwise (a) by 90 degrees and pull it down.

Note : Check that the guideline and the loosening

indication line are aligned.

■ After installing water filter

Reassemble the lamp cover and the top shelf of the refrigerator. To place the top shelf of the refrigerator, raise the front part of the shelf a bit so that the hook of the shelf is fit into the groove. In order to clean the water filter system, drain water for about 3 min.

Note : Then open the door of the refrigerator and check for

water droppings on the shelf under the filter.

HOW TO INSTALL REFRIGERATOR

- 22 -

Control box

Aligning with the guide line and the fastening indication line

Control box

Aligning with the guide line and the loosening indication line

Separation of red cap

Adhesion sticker

Substitute cap

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

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

1. Pull out the ice bank in the upper part of the freezer compartment.

Caution : • Do not put hands or tools into the chute to confirm

the operation of geared motor. it may damage refrigerator or hurt hands.)

• Check the operation of motor with its operation noise.

2. Apply electricity after connecting water pipe.

1) Press test switch under the icemaker for two seconds as shown below.

2) The bell rings(ding~dong) and ice tray rotates and water comes out from the icemaker water tube.

3) The water shall be supplied two or three times into the tray. The amount of water supplied for each time is small. Put a water container under the ice tray and press test switch.

4) When ice tray rotates, the water in it will spill. Collect the spilt water and throw away into the sink.

5) When ice tray has finished rotation, water comes out from the water tube. Confirm the amounts of water in the ice tray. (refer to fig. The optimum amount of water is 110cc)

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

HOW TO INSTALL REFRIGERATOR

- 23 -

Test Switch

Confirm the amount

of water

Ice maker

Too much Too little

Optimum level

3-2. Control the amount of water supplied to the

icemaker.

Caution : • Please unplug the power cord from the wall

outlet and wait for more than three minutes before disconnecting PWB cover as 310V is applied in the control panel.

1. Disconnect PWB cover from the upper part of the refrigerator.

2. Adjust the amount of water supplied by using DIP switch.

■ Water Supplying Time Control Option

1) The water supplying time is set at five seconds when the refrigerator is delivered.

2) The amount of water supplied depends on the setting time and water pressure (city water pressure).

3) If ice cube is too small, increase the water supplying time. This happens when too small water is supplied into the ice tray.

4) If ice cube sticks together, decrease the water supplying time. This happens when too much water is supplied into the ice tray.

Caution : When adjusting the amount of water supplied,

adjust step by step. Otherwise the water may spill over.

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

HOW TO INSTALL REFRIGERATOR

- 24 -

SWITCH NO Water Suppling

S/W1 S/W2 S/W3 Time

OFF OFF OFF 6.5 Sec.

ON OFF OFF 5.5 Sec.

OFF ON OFF 6 Sec.

ON ON OFF 7 Sec.

OFF OFF ON 7.5 Sec.

ON OFF ON 8 Sec.

OFF ON ON 9 Sec.

ON ON ON 10 Sec.

(+) Driver

Switch ON Switch OFF

Confirm the amount

of water

Optimum level

1. Monitor Panel

1-1. GR-P247, GR-P207, GR-L247, GR-L207 1-2. GR-C247, GR-C207, GR-B247, GR-B207, GR-B197

2. Description of Function

2-1. Funnction of Temperature Selection

* The temperature can vary ±3 °C depending on the load condition. *( ) : 127V/60Hz, 110~115V/60Hz, 115V/60Hz Rating ONLY.

*< > : TAIBEI

1. When power is initially applied or reapplied after power cut, “Medium” is automatically selected.

2. When the temperature selection switch in the freezer and refrigerator compartments is pressed, the light is on in the following sequence: "Medium"

➝ "Medium Max" ➝ "Max" ➝"Min" ➝ "Medium Min" ➝ "Medium"

3. The temperature setting condition of freezer and refrigerator compartments shall not be indicate in the standard model (GR-P247, GR-P207, GR-L247, GR-L207, GR-C247, GR-C207, GR-B247, GR-B207) when refrigerator or home bar door is closed.

MICOM FUNCTION

- 25 -

FRZ

Temp

REF

Temp

SELECT

Max

Min

Function Monitor

Freezer compartment

temperature control Button

Refrigerator compartment

temperature control Button

Dispenser selection button

123455

Max MaxMin

4321

FRZ

Temp

REF

Temp

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

Change of Indication Lamp

Temperature Control

Medium Medium Max Max Min Medium Min

Freezer -19 °C -22 °C -23 °C

-15 °C -17 °C

Control (-18 °C) (-20.5 °C) (-22 °C)

<-19 °C> <-20.5 °C> <-22 °C> <-16.5 °C> <-18 °C>

Refrigeration

3 °C 1.5 °C 0°C

6 °C

4.5 °C

Control (7 °C)

<2 °C> <1 °C> <0 °C> <4.5 °C> <3 °C>

FRZ

Temp

Max

Min

REF

Temp

FRZ

Temp

Max

Min

REF Temp

FRZ

Temp

Max

Min

REF

Temp

FRZ

Temp

Max

Min

REF

Temp

FRZ

Temp

Max

Min

REF

Temp

2-2. Control of Variable Speed Fan in the Refrigerator Compartment

1. Fan motor in the freezer compartment shall change from standard to high speed rpm in order to increase cooling speed and load corresponding speed.

2. High speed rpm is only used for the initial power application and load corresponding operation. But standard rpm is used in the general working conditions.

3. Fan motor in the freezer compartment operates normally when freezer, refrigerator, or home bar door opens and fan motor in the freezer compartment operates (the speed changes from high to standard rpm if fan motor operates at high speed rpm). But fan motor in the freezer compartment stops when refrigerator or home bar door is open and refrigerator compartment door is closed.

2-3. Door Opening Alarm

1. Buzzer warns when freezer, refrigerator, or home bar door is kept open for more than 1 minute.

2. Buzzer warns 3 times at 0.5 second interval and then 3 times at 0.5 second on and off in every 30 seconds if door is kept open for more than 1 minute.

3. Warning is released when freezer, refrigerator, or home bar door is closed during door opening alarm.

2-4 Button Selection Buzzer Sound

1. “Bell” sounds when button on the front display is pressed.

2-5. Forced Start, Forced Defrost Buzzer Warning

1. When test button in the main PWB is pressed, “beep” sounds.

2. When forced start is selected, warning sounds three times for 0.2 second on and 1.8 seconds off.

3. When forced defrost is selected, warning sounds three times in the following cycle: 0.2 second on and 0.2 second off, 0.2 second on and 0.2 second off, and 0.2 second on and 1.0 second off.

2-6. Functions of Defrost

1. Defrost starts whenever the compressor operation time accumulates to seven to seven and a half hours.

2. Defrost starts whenever the compressor operation time accumulates to four to four and a half hours if power is initially applied (or reapplied after power cut).

3. Defrost completes when the temperature of defrost sensor reaches at 5 °C. Faulty defrost is indicated if the defrost sensor does not reach at 5 °C after 2 hours of defrosting.

4. Defrost does not work when defrost sensor is out of order (wire cut or short-circuit).

MICOM FUNCTION

- 26 -

Closed Open Closed Open

3Times 3Times 3Times 3Times

Closed

Within one minute one minute

Seconds

Freezer,

Refrigerator,

Home Bar Door

Buzzer

2-7. Electric Equipment Sequential Operation

Electric equipment such as compressor, defrost heater, cooling fan, step motor damper, etc. operates in the following sequence when power is initially applied and test is completed in order to reduce noise and parts damage.

MICOM FUNCTION

- 27 -

Function Operation Sequence Remarks

When power isinitially applied TEST MODE

Defrost sensor temperature is above 10 °C (purchased or

house-moving)

If there is any error in functions, initial starting does not work.

If switch is pressed one more or defrost sensor temperature is above +5 °C, it returns to test mode and restarts. (compressor shall operate after 7 minutes)

Defrost sensor temperature is below 10 °C (power cut or service)

Test Mode 1 (Forced Start)

Test Mode 2 (Check Freezer fan )

Test Mode 3 (Forced defrost)

POWER

COMP

WATER

TANK

HEATER

FAN 1400 (High Speed

Operation)

FAN 1400 (High Speed

Operation)

FAN 1400 (High Speed

Operation)

OFF

WATER

TANK

HEATER

OFF

FAN 1170

(Standard

Operation)

FAN 1170

(Standard

Operation)

OFF

STEP

MOTOR

DAMPER

STEP

MOTOR

DAMPER

STEP

MOTOR

DAMPER

OPEN

STEP

MOTOR

DAMPER

HOME

BAR

HEATER

POWER

DEFROST

HEATER

HOME

BAR

HEATER

OFF

HOME

BAR

HEATER

TEST

S/W

(Press

Once)

COMP

TEST

S/W (Press Twice)

COMP

OFF

0.5

sec.

0.3

sec.

0.3

sec.

0.3

sec.

0.5

sec.

0.3

sec.

DEFROST

HEATER

OFF

DEFROST

HEATER

sec.

0.3

sec.

COMP

FAN 1170

(Standard Operation)

STEP

MOTOR

DAMPER

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.

OTHER LOADS

OFF

TEST

S/W (Press

Three

Times)

0.3

sec.

0.3

sec.

2-8. Function of Trouble Diagnosis

1. Function of trouble diagnosis is to make the repair service easy when the refrigerator is out of order during service.

2. The function control button does not work but the recognition sound is heard when the refrigerator is out of order.

3. It returns to normal conditions when trouble code led is off. (reset)

4. Trouble code is indicated by the freezing temperature indicator led in the refrigerator display. All leds except trouble code are off.

MICOM FUNCTION

- 28 -

FRZ

TEMP

REF

TEMP

SELECT

Max

Min

TROUBLE

CODE INDEX

A B C D

Trouble Code Indicator

Operation conditions during Trouble

No. T rouble Troubles Freezer Defrost

Step motor

F4 F3 F2 F1

Compressor

Fan Heater Damper

Abnormal Freezer

lll

Freezer sensor short

15 min. on/

Standard

ˇ ˇ

sensor.

15 min. off

RPM

Abnormal Refrigerator

sensor 1 (R1)

lll

Refrigerator sensor 1 short circuit

Standard

Note 2)

(Upper part in the RPM refrigerator compartment)

Abnormal Refrigerator

sensor 2

(lower part

Note 1)

Refrigerator sensor 2 short circuit

Standard

ˇ ˇ

in the refrigerator RPM compartment)

Abnormal Defrost

lll

Defrost sensor short circuit

Standard No

sensor RPM defrosting Failed defrosting Defrost Heater , Temperature Fuse

 

short circuit.

Standard

ˇ ˇ

Unplugged Connector RPM (Indicated 4 hour later after trouble)

Abnormal Open Air

Open air temperature detecting sensor

6 T emperature Note 1)

short circuit

ˇ ˇ ˇ

Detecting sensor

Abnormal

Note 1)

Defrost sensor

short circuit.

ˇ ˇ ˇ ˇ

ice making sensor Abnormal Faulty I

ce Maker Unit Motor or

8 ice maker unit

Note 1)

Hall IC, L/Wire short circuit. ˇ

Standard

ˇ ˇ

Faulty motor driving circuit.

RPM

 : On l : Off ˇ : Normal

Note 1) When open air temperature detecting sensor, refrigerator sensor 2, ice maker unit, ice making sensor are

abnormal, it is not indicated in the trouble code. But it is indicated while checking LED (press freezer and refrigerator temperature control buttons for more than 1 second at the same time).

Room Temperature

Normal :

LED On.

Detection Sensor Abnormal :

LED Off.

Refrigerator Sensor 2

Normal :

LED On.

(lower shelf) Abnormal :

LED Off.

Home Bar Sensor

Normal :

LED On.

Abnormal :

LED Off.

Ice Maker Unit

Normal :

LED On.

Abnormal :

LED Off.

Note 2) When refrigerator sensor is abnormal, it opens for 10 minutes and closes for 15 minutes.

2-9. Test Function

1. Test function is to check the function of PWB and products and to find defective parts when the refrigerator is out of order.

2. Test button is on the main PWB of the refrigerator. Test mode completes after 2 hours in maximum and returns to normal conditions.

3. Function control button does not work but button recognition sound is heard during the test mode.

4. When test mode is completed, unplug and replug the power cord to return to the normal conditions.

5. When sensor is abnormal in the test mode, test mode is released and trouble code is indicated.

6. Test mode does not work even test button is pressed when trouble code indicator is on.

MICOM FUNCTION

- 29 -

Mode Operation Contents Remarks

Test 1

Test 2

Test 3

Normal

Press test button once

Press test button once in Test Mode 1

Press test button once in Test Mode 2

Press test button onec in test mode 3

1. Continuous compressor operation

2. Continuous freezer fan (high rpm) operation

3. Defrost heater off.

4. All display LEDs are on.

5. Electronic stepping motor damper open (baffle is open).

1. Compressor off.

2. Freezer fan (high rpm) off.

3. Freezer fan (standard rpm) on.

4. Defrost heater off.

5. “Medium Weak” led in freezer and

refrigerator temperature indicators are on.

6. Step motor damper open condition (baffle is open)

1. Compressor is off.

2. Freezer fan off.

3. Defrost heater on.

4. “Medium” leds in freezer and refrigerator temperature indicators are on.

5. Step motor damper closed condition (baffle is open)

Return to initial conditions

Forced start

Check fan in the freezer compartment

• Return to normal conditions when defrost sensor is above 5 °C.

• Forced defrost.

Compressor starts after seven minutes.

A A B B

C D

The rest of LEDs are all on

* LED check function- When freezer and refrigerator temperature control buttons are pressed for more than 1 second at the

same time, all LEDS on the display are on. And it returns to the normal conditions when the buttons are released.

* Check of freezer fan rpm variation- Freezer fan speed changes from high speed to standard speed and vice versa for 30

seconds whenever freezer and refrigerator temperature control buttons are pressed at the same time for more than 1 second when freezer fan is in operation and returns to the previous rpm.

2-10. Functions of Ice Dispenser and Water Dispenser

1. Ice and cold water are available without opening refrigerator door.

2. The desired ice (crushed or cube) or cold water are dispensed when dispenser press button (rubber button) is pressed after selection of ice or cold water. When ice is selected, duct door opens by electric solenoid when dispenser press switch is pressed. When dispenser press switch is released, duct door closes after it opens for 5 seconds.

3. Ice and water dispensing function stops when freezer door is open.

4. Geared motor and solenoid are automatically off if there is no signal after 3 minutes when ice (crushed and cube) or water is selected and dispenser switch is pressed down. Solenoid (duct door) stops after 5 seconds when solenoid is off. (in order to protect short circuit from solenoid heat generation)

5. Dispenser Lamp On/Off Function. The dispenser lamp shall be on or off whenever dispenser button is pressed or released, respectively after selection of ice (crushed or cube) or water.

6. Water/Crushed Ice/Cube Ice Selection function

1) It is to select water/crushed ice/cube ice by user from the function control part and it will be indicated and selected by pressing button.

2) Crushed ice is automatically selected when power is initially on.

3) When crushed ice is selected and its button is pressed, geared motor operates and crushed ice is dispensed.

4) When cube ice is selected and its button is pressed, geared motor and ice solenoid operate and cube ice is dispensed.

7. Function of Water Dispenser

1) When user selects water in the function control parts, it is indicated in the LED and water is selected.

2) Water dispenser is a direct tap water connection type. The water solenoid valve on the right of machine room opens and water dispenses when user selects water and presses button.

MICOM FUNCTION

- 30 -

1. Description of PWB Circuit

1-1. Power Circuit

1. GR-P247, GR-P207, GR-L247, GR-L207

Power circuit is composed of switching mode power supply (SMPS) electric parts. SMPS is composed of rectifying part (D1~D4, CE1) which converts AC to DC voltage, switching part (IC2) which switches this converted DC voltage, trans which transmits primary energy to secondary energy, secondary power source which transmits power to MICOM and IC, and feed back part (IC3, ZD1) which feeds back voltage to primary trans in order to maintain constant secondary voltage. The voltages at each part are as follows.

Note : If circuit is abnormal, repair it after 3 minutes when power cord is unplugged. Be care of electric shock as high

voltage (DC 310 V) is applied to the circuit.

2. GR-C247, GR-C207, GR-B247, GR-B207

In the trans secondary side is composed of power source (12 Vdc) for driving relay and power source (5 Vdc) which supplies power to MICOM and IC. Voltages in each part are as follows.

1-2. Oscillation Circuit

This is to generate basic time for synchronous clock and time calculation for internal logic element to send and receive information.Standard parts should be used as the time calculated by IC1 shall be changed or shall not work if OSC1 specification is changed.

1-3. Reset Circuit

Reset circuit is to initialize RAM in MICOM (IC1) and make all functions to start from the initial conditions when power is nitially applied or power is reapplied to MICOM after power cut. Low voltage is applied for 10 ms to the reset terminal of MICOM when power is applied. 5 voltage is applied to the reset terminal for general operation. (MICOM does not

work when IC9(Reset IC) is failed)

MICOM CIRCUIT DESCRIPTION

- 31 -

Position VA1 CM1 CM2 CE2 CE4

Voltage 220 Vac 14 Vac 17 Vac 12 Vdc 5 Vdc

1-4. Load/Dispenser Operation, Buzzer Driving, Door Opening Detecting Circuit

1. LOAD DRIVING CIRCUIT

* Freezer fan motor shall stop when freezer or refrigerator door is open. Freezer fan motor shall immediately operate when

freezer or refrigerator door is closed. * Door switches A, B, C, D, E, F of freezer and refrigerator are connected to the door opening detecting circuit in Micom. * Home bar door switch E, F is parallelly connected to the refrigerator door switch C, D. Therefore it can detect door opening

when one of the door is open.

1) GR-P247, GR-P207, GR-L247, GR-L207

MICOM CIRCUIT DESCRIPTION

- 32 -

Refrigerator

Machine Defrost AC Converting Heater, Plate Fan Motor

Load Types

Room Heater Relay (W/TANK) High Standard

Speed

Measuring Locations(IC 6)

No.10 No.11 No.12 No.16 No.13 No.14

Condition

ON Below 1 V

OFF 12 V

POWER

2) GR-C247, GR-C207, GR-B247, GR-B207, GR-B197

* Freezer fan motor shall operate when freezer, refrigerator, or home bar door is open. * Door switches A, B, C, D of freezer and refrigerator are connected to door opening detecting circuit in Micom. * Home bar door switch E, F is parallelly connected to the refrigerator switch C, D. Therefore it can detect door opening

when one of the door is open.

MICOM CIRCUIT DESCRIPTION

- 33 -

Refrigerator

Machine Defrost

AC Converting

Refrigerator Home Bar Fan Motor

Load Types

Room Heater Relay

Compartment Lamp

Heater High Standard

Speed

Measuring Points(IC 4)

No.10 No.11 No.12 No.16 No.15 No.13 No.14

Conditions

ON Below 1 V

OFF 12 V

2. Dispenser Operation Circuits

GR-P247, GR-P207, GR-L247, GR-L207

1) LOAD DRIVING CONDITION CHECK

2) Lever Switch Detecting Circuit

MICOM CIRCUIT DESCRIPTION

- 34 -

POWER

LOAD TYPE

GEARED SOLENOID

WATER VAL VE

SOLENOID HOME BAR Refrigerator

MOTOR CUBE

ICE WATER

PILOT DISPENSER HEATER

Compartment Lamp

Measuring Points No.15(IC6) No.10(IC7) No.11(IC7) No.12(IC7) No.16(IC7) No.14(IC7) No.15(IC7) No.13(IC7)

Conditions

ON Below 1V

OFF 12V

Measuring Points

Lever S/W

IC1(Micom) No. 17

On(Press)

OFF 5V

5V 0V

(60Hz)

3. Buzzer Driving Circuits

4. Door Opening Detecting Circuits

* Door opening detecting switch ( A - B) can not detect door opening when switch ( A - B) or lead wire is failed even though

freezer door switch is normal. * Refrigerator lamp shall not be on when refrigerator door switch can not detect door opening detecting switch ( C - D) or

home bar door switch ( E - F).

MICOM CIRCUIT DESCRIPTION

- 35 -

CONDITIONS

Bell sounds when button on Beep sounds when warning

MEASURING

dosplay is pressed. door opening.

OFF

POINTS

IC1 (No. 50 Pin) 0 V

IC1 (No.51 Pin) 0 V

MEASURING POINTS

FREEZER /

IC1 (MICOM) (Pin No. 46 and 48)

REFRIGERA TOR DOOR

CLOSED 5 V (A - B, C - D, E - F both ends S/W off conditions)

OPEN 0 V (A - B, C - D, E - F both ends S/W on conditions)

5 V 0 V

0.05 s

2.63 kz (DING)

0.2 s 0.1 s 0.4 s 0.5 s 0.5 s 5 V

0 V 5 V

2.21 kz (DONG)

0 V

2.63 kz (BEEP)

OFF

1-5. Temperature Detecting Circuit, Duct Door Heat Working Circuit

The above circuit is fixed in the freezer compartment sensor, refrigerator compartment sensor, ice making sensor, and defrost sensor. The condition of short or open of each temperature sensor is as follows.

* 12 Vdc shall be applied to No. 10 and 11 terminals of CON6 as duct door heater is always on.

MICOM CIRCUIT DESCRIPTION

- 36 -

SENSOR CHECK POINT

NORMAL(-30 °C ~ 50 °C)

SHORT OPEN

OPEN AIR SENSOR POINT A Voltage

FREEZER SENSOR POINT B Voltage

DEFROST SENSOR POINT C Voltage

0.5 V~4.5 V 0 V 5 V

REFRIGERATOR SENSOR 1 POINT E Voltage

REFRIGERATOR SENSOR 2 POINT F Voltage

ICE MAKER SENSOR POINT G Voltage

1-6. Switch Input Circuits

The following circuit is an input circuit to detect the test switch for refrigerator detection and to detect the signal of electronic single motor damper reed switch.

1-7. Option Designation Circuit (Model Classifying Function)

The above circuit is to designate model by option and inform it to MICOM. The option designation and application standard for each model is as follows.

u This circuit is fixed in the factory before shipment. Do not add or remove option at your discretion.

1-8. Stepping Motor Working Circuit

Motor rotates as rotating magnetic forms on the coils wound on each phase of stator when Micom pin No. 41 applies “High” signal to IC6 (TA774AP) and Micom pin No. 42 and 43 produces “High” and ‘Low” signals.

MICOM CIRCUIT DESCRIPTION

- 37 -

TEST S/W

Classification Connection Conditions Application Standard

Connection Other area (Changable)

OP1

Cut Domestic

Connection Model with dispenser

OP2

Cut Model without dispenser

Description)

MICOM Pin No. 41, 42, and 43 terminals send signals of which wave form are shown on the right in 3.33 msec cycles. These signals pass through input terminals (No. 3, 6, and 8) of motor driving IC6 (TA7774AP) and are sent to the output terminal (No. 10, 11, 14, 15). These output signals form rotating magnetic on the coils wound on each phase of stator and motor rotates. When signals are input to INa and INb of motor driving IC (TA774AP), rotating magnetic forms on the coils wound on each phase of stator and stepping motor damper rotates.

1-9. Temperature Compensation and Over Cooling/Weak Cooling Compensation Circuit

1. Freezer and refrigerator compartment temperature compensation

• Temperature Compensation Table by Resistance Adjustment (the difference compared to the present temperature) EX) The temperature of refrigerator increases by 1 °C if refrigerator compartment compensation resistance is changed

from 10 kΩ to 18 kΩ.

MICOM CIRCUIT DESCRIPTION

- 38 -

Refrigerator Compartment Temperature Compensation

Freezer Compartment Temperature Compensation

Freezer Compartment Refrigerator Compartment

Resistance value Temperature Resistance value Temperature Remarks

(RCF1) Compensation (RCR1) Compensation 180 kΩ +5 °C 180 kΩ +2.5 °C Compensate to

56 kΩ +4 °C 56 kΩ +2.0 °C warm 33 kΩ +3 °C 33 kΩ +1.5 °C 18 kΩ +2 °C 18 kΩ +1.0 °C 12 kΩ +1 °C 12 kΩ +0.5 °C 10 kΩ 0 °C 10 kΩ 0 °C

Reference temperature

8.2 kΩ -1 °C 8.2 kΩ -0.5 °C

5.6 kΩ -2 °C 5.6 kΩ -1.0 °C

3.3 kΩ -3 °C 3.3 kΩ -1.5 °C 2 kΩ -4 °C 2 kΩ -2.0 °C Compensate to

470 Ω -5 °C 470 Ω -2.5 °C cool

(INa)

(INb)

#15 #10

#14

#11

(reverse rotation) (forward rotation)

(A) (B)

(A)

(B)

u Refrigerator compartment temperature compensation table is as shown below.

• Temperature adjustment of refrigerator compartment is conducted by the same way as that of refrigerator. The temperature compensation of freezer is twice of refrigerator.

• This circuit is to input the degree of temperature compensation to MICOM in order to adjust the temperature of refrigerator.

MICOM CIRCUIT DESCRIPTION

- 39 -

Amended Resistance

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

Present Resistance

No 0.5 °C 1 °C 1.5 °C 2 °C 2.5 °C 3 °C 3.5 °C 4 °C 4.5 °C 5 °C

470Ω

change

Increase Increase Increase Increase Increase Increase Increase Increase Increase Increase

0.5 °C No 0.5 °C 1 °C 1.5 °C 2 °C 2.5 °C 3 °C 3.5 °C 4 °C 4.5 °C

2 kΩ

Decrease change

Increase Increase Increase Increase Increase Increase Increase Increase Increase

1 °C 0.5 °C No 0.5 °C 1 °C 1.5 °C 2 °C 2.5 °C 3 °C 3.5 °C 4 °C

3.3 kΩ

Decrease

change

Increase Increase Increase Increase Increase Increase Increase Increase

1.5 °C 1 °C 0.5 °C No 0.5 °C 1 °C 1.5 °C 2 °C 2.5 °C 3 °C 3.5 °C

5.6 kΩ

Decrease Decrease Decrease

change

Increase Increase Increase Increase Increase Increase Increase

2 °C 1.5 °C 1 °C 0.5 ° No 0.5 °C 1 °C 1.5 °C 2 °C 2.5 °C 3 °C

Refrigerator

8.2 kΩ

Decrease Decrease Decrease

Drop

change

Increase Increase Increase Increase Increase Increase

Compartment

2.5 °C 2 °C 1.5 °C 1 °C 0.5 °C No 0.5 °C 1 °C 1.5 °C 2 °C 2.5 °C

(RCR1) 10 kΩ

Decrease Decrease Decrease Decrease Decrease

change

Increase Increase Increase Increase Increase

3 °C 2.5 °C 2 °C 1.5 °C 1 °C 0.5 °C No 0.5 °C 1 °C 1.5 °C 2 °C

12 kΩ

Decrease Decrease Decrease Decrease Decrease Decrease

change

Increase Increase Increase Increase

3.5 °C 3 °C 2.5 °C 2 °C 1.5 °C 1 °C 0.5 °C No 0.5 °C 1 °C 1.5 °C

18 kΩ

Decrease Decrease Decrease Decrease Decrease Decrease Decrease

change

Increase Increase Increase

4 °C 3.5 °C 3 °C 2.5 °C 2 °C 1.5 °C 1 °C 0.5 °C No 0.5 °C 1 °C

33 kΩ

Decrease Decrease Decrease Decrease Decrease Decrease Decrease Decrease

change

Increase Increase

4.5 °C 4 °C 3.5 °C 3 °C 2.5 °C 2 °C 1.5 °C 1 °C 0.5 °C No 0.5 °C

56 kΩ

Decrease Decrease Decrease Decrease Decrease Decrease Decrease Decrease Decrease

change

Increase

5 °C 4.5 °C 4 °C 3.5 °C 3 °C 2.5 °C 2 °C 1.5 °C 1 °C 0.5 °C No

180 kΩ

Decrease Decrease Decrease Decrease Decrease Decrease Decrease Decrease Decrease Decrease

change

2. Refrigerator Weak Cooling and Over Cooling Compensation Circuit

• The above option circuit is to compensate the refrigerator compartment temperature by cutting during service.

MICOM CIRCUIT DESCRIPTION

- 40 -

WEAK COOLING OVER COOLING

COMPENSATION COMPENSATION

REFRIGERATOR COMPARTMENT

REMARKS

JCR3 JCR4 JCR1 JCR2

TEMPERATURE COMPENSATION

0 °C (FACTORY SHIPPING)

CUT -1 °C

CUT +1 °C

CUT CUT -2 °C

CUT CUT +2 °C CUT CUT 0 °C CUT CUT 0 °C

CUT CUT 0 °C CUT CUT 0 °C

CUT CUT CUT -1 °C

CUT CUT CUT +1 °C

CUT CUT CUT CUT 0 °C

Temperature Compensation by Cutting

JCR1 +1 °C

+2 °C

JCR2 +1 °C JCR3 -1 °C

-2 °C

JCR4 -1 °C

1-10. Key Button Input and Display Lighting Circuit

1. GR-P247, GR-P207, GR-L247, GR-L207

This circuit is to judge the work of function control button on the operation panel and to light each function indication led (LED module). It is driven by SCAN method.

2. GR-C247, GR-C207, GR-B247, GR-B207, GR-B197

MICOM CIRCUIT DESCRIPTION

- 41 -

FRZ

TEMP

REF

TEMP

SELECT

RST

Max

Min

Freezer Temp Control

Refrigerator Temp Control

Crushed /Water /Cube

Freezer Temp Control

Refrigerator Temp Control

2. Sensor Resistance Characteristic Table

• Tolerance of sensor resistance is ±5 %.

• Leave the sensor at measuring temperature for more than 3 minutes when measuring sensor resistance. (necessary due to detecting speed)

• It is desirable to use digital tester as analogue tester has wider measuring temperature.

• Disassemble refrigerator sensor 1 and 2 from CON8 of main PWB assembly and measure it with digital tester.

• Disassemble freezer sensor from CON7 of main PWB assembly and measure it with digital tester.

MICOM CIRCUIT DESCRIPTION

- 42 -

Measured Temperature (°C) Freezer Sensor

Refrigerator Sensor 1 and 2, Defrost Sensor and

Open Air 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 kΩ +30 °C 2.0 kΩ 8.9 kΩ +40 °C 1.4 kΩ 6.2 kΩ +50 °C 0.8 kΩ 4.3 kΩ

3. PWB Parts Drawings and List

3-1. PWB Assembly Main Parts Drawings

1 GR-P247, GR-P207, GR-L247, GR-L207

MICOM CIRCUIT DESCRIPTION

- 43 -

STICKER

6871JB1064

321

OFF

J36

ZD2 ZD3

DUCT

HTR

CON6

[DISPLAY]

ZD4

J47

J48

J49

J50

R25

R26

R27

R28

R29

RT-SNR

OP2

OXO

DISPENSER

DISPENSER LESS

NOM, ISO

OTHERS

OP1

IC8

D22

D21R14

RY13

DSP

LAMPVALVE

H/BAR

HTR

SLND

DISP

J33

CR1

J32

RY10

RY9RY8RY7

RY6

VA2

RY5

RY4

RY14

RY1RY3RY2

CON1

FUSE1

FUSE2

CM1

J55

CE1

CM3

TRANS

CC4

CC3

CC1

J01

J02

J03

J41

J42

RR2

RR1

J09

J10

J11

J12

RD1

RIM1

R17

RCF1

RCR1

RF1

R44

CC18

CC17

CC14

CC15

CC25

R43

R39

CC7

CC6

R40

R54

J21

J22

R48

R55

R45

R41

R50

R52

J23

J24

J25

R36

CE6

R32

J26

R38

J20

R53

J17

R42

J15

R46

J14

R56

J13

J16

J19 J18

CC19

CC30

CC16

CC23

CC24

J52

J53

CC5

R31

R13

J51

CE2

CE4

J40

R49

CM4

IC11

CC21

CC20

CE8

R57

BUZZER

R58

CE7

J05

J06

J04

CC22

CC28

CON7

F-SNR D-SNR FD/SW

J43

CON9

ICE/M

MOTOR

ICE/M

SNR

STOP

S/W

TEST

S/W

H/IC

R51

CC29

R1-SNR R2-SNR RD/SW STEP MOTOR

DAMP

HTR

CON8

J44

IC10

R37

R18

CC27

R59

J07

J54

60 55

45 40 35

R47

J45

J46

J28

SW1

CC26

J08

CE3

IC3

IC2

D10 D9

D23

D11

J39

J29

J38

IC7

D13

D12

J60

CC13

J27

CE5

IC6

IC5

ZD1

CM2D1 D2

J34

TAB1

TAB2

VA1

J35

J56

COM(YELLOW)

CON2

N-OPEN

COM(YELLOW)HTR-DEFROSTCOMP/FAN-COOL

N-CLOSE

CON4CON3

R-LAMPICESLNDGEAR/MTRFAN-STDFAN-HGHW/T-HTR WATER

VALVE

RY12

CON5

IC9

CC11

R16

CC10

OSC1

R15

302520

S/W2

D16

D14

D17

D18

D19

D20

J31

RY11

D15

1510

J37

R12

CC9

R35

R34

R33

R22

JCR1

JCR2

JCR3

JCR4

R21

R20

R19

R24

R23

R30

RT1

J30

CC12

OP1

OP2

5IC1

2 GR-C247, GR-C207, GR-B247, GR-B207, GR-B197

MICOM CIRCUIT DESCRIPTION

- 44 -

TRANS

VA1

CON1

DIP

CE1

D2 D4

CM1

CM2

IC2

IC3

CC2

CC1

CC7

CC3

IC1

IC4

J21

J22

CC5

OSC1

CC4

J23

IC5

60 55 50 45 40 35

5 1015202530

CE5

R16

CE2

CE3

D3 D1

BUZZER

R29

R30

J06

CE6

J07

CON7

CON6

R1/S

F/S D/S FD/SW

R2/S RD/SW DAMP/HTR STEP/M

TEST

R25 J08 R17 J09

J10

J19 J20

R21

RR1 RR2

J03 J04

RF1

J05

RD1

R31

J01

J18

J24

J30

R32

J27

J11

IC6

CE7

D8D7

D10

D13

J28

RY8

CON4

R-LAMPH/BARFAN-STDFAN-HGH

RY7RY3RY4

VA2

D12

D11

J02

CC12

R23

CC11

R22 CC8 R18 CC9 R19

RCF1

RCR1

CC13

R24

J12

CC10

R20

J13 J14

R28

J15

R27

J16

R26

JCR1

R10

RT1

R15 J17

CON5

CC6

JCR2

JCR3

JCR4

OP1

OP2

STICKER

RY6

J29

RY3RY2

FUSE 250V/15A (OPTION)

J26

J25

RY1

6871JB1071

CON3

HTR-DEFROST COM N-CLOSE COM N-OPENCOMP/FAN-COOL

CON2

3-2. Parts List

1. GR-P247, GR-P207 / GR-L247, GR-L207

MICOM CIRCUIT DESCRIPTION

- 45 -

GR-L247/207

GR-P247/207

WORK

GR-L247/207

GR-P247/207

WORK

1. GR-P247, GR-P207, GR-L247, GR-L207

MICOM CIRCUIT DESCRIPTION

- 46 -

GR-L247/207

GR-P247/207

WORK

2. GR-C247, GR-C207, GR-B247, GR-B207, GR-B197

MICOM CIRCUIT DESCRIPTION

- 47 -

JCR1 JCR2 JCR3 JCR4

4. PWB circuit drawing- PWB circuit drawing may change depending on the conditions.

1 GR-P247, GR-P207,

GR-L247, GR-L207

MICOM CIRCUIT DESCRIPTION

- 48 -

MICOM CIRCUIT DESCRIPTION

- 49 -

Freezer Temp Control

Refrigerator Temp Control

Crushed /Water /Cube

2. GR-C247, GR-C207, GR-B247, GR-B207, GR-B197

MICOM CIRCUIT DESCRIPTION

- 50 -

Refrigerator Compartment Temperature Compensation

Freezer Compartment Temperature Compensation

MICOM CIRCUIT DESCRIPTION

- 51 -

Freezer Temp Control

Refrigerator Temp Control

1. Working Principles

1-1. Ice Maker Working Principles

1-2. Dispenser Working Principles

1. This function is available in Model GR-P247, GR-P207 and GR-L247, GR-L207 where water and ice are available without opening freezer compartment door.

2. “Crushed Ice” is automatically selected when power is initially applied or reapplied after power cut.

3. When dispenser selection switch is continuously pressed, light is on in the following sequence: “Water” → “Cube Ice” → “Crushed Ice”.

4. Lamp is on when dispenser rubber button is pressed and vice versa.

5. When dispenser crushed ice rubber button is pressed, dispenser solenoid and geared motor work so that crushed ice can be dispensed if there is ice in the ice bank.

6. When dispenser cube ice rubber button is pressed, dispenser solenoid, cube ice solenoid and geared motor work so that cube ice can be dispensed if there is ice in the ice bank.

7. When dispenser water rubber button is pressed, water valve opens and water is supplied if water valve is normally installed on the right side of the machine room.

8. Ice and water are not available when freezer door is open.

ICE MAKER AND DISPENSER WORKING PRINCIPLES AND REPAIR

- 52 -

• Level Ice Maker Cube Mould for “Initial Control” after power is input.

Power Input

Initial Control

Ice Making Control

Ice Ejection Control

Water Supply Control

Test Control

• Wait until the water in the cube mould is frozen after ice maker starts operation.

• Check ice bank is full of ice by rotating ice ejection motor in normal and reverse direction and eject ice into the ice bank if ice bank is not full.

• This is for refrigerator assembly line and service. When “ice making test switch” is pressed, it operates in the following steps: initial ice ejection water supply control steps.

• Conduct “Ice Making Control” after supplying water into the ice maker cube mould by operating water valve.

2. Function of Ice Maker

2-1. Initial Control Function

1. When power is initially applied or reapplied after power cut, it detects level of ice maker cube mould after completion of MICOM initialization. The detecting lever moves up and down.

2. The level of ice maker cube mould is judged by output signal, high and low signal, of Hall IC. Make the cube mould to be horizontal by rotating ice ejection motor in normal or reverse direction so that High/Low signal can be applied to MICOM Pin No. 44.

3. If there is no change in signals one minute after the geared motor starts to operate, it stops icemaker operation and check the signal every hour. It resets initialization of icemaker when it becomes normal.

4. It judges that the initial control is completed when it judges the ice maker cube mould is horizontal.

5. Ice ejection conducts for 1 cycle irrespect of ice in the ice bank when power is initially applied.

2-2. Water Supply Control Function

1. This is to supply water into the ice maker cube mould by operating water valve in the machine room when ice ejection control is completed and ice maker mould is even.

2. The quantity of water supplied is determined by DIP switch and time.

3. If water supply quantity setting is changed while power is on, water supplies for the amended time. If DIP switch is changed during water supply, water shall be supplied for the previous setting time. But it will supply for the amended time from the next supply.

4. When water supply signal is applied to water and ice valves at the same time during water supply, water shall be supplied to water valve. If water supply signal is applied to ice valve during water supply, water shall be supplied to both water and ice valves.

2-3. Ice Making Control Function

1. Ice making control is carried out from the completion of water supply to the completion of ice making in the cube mould. Ice making sensor detects the temperature of cube mould and completes ice making. (ice making sensor is fixed below ice maker cube mould)

2. Ice making control starts after completion of water supply control or initial control.

3. It is judged that ice making is completed when ice making sensor temperature reaches at -8°C after 100 minutes when water is supplied to ice maker cube mould.

4. It is judged that ice making is completed when ice maker sensor temperature reaches below -12 °C after 20 minutes in condition 3.

ICE MAKER AND DISPENSER WORKING PRINCIPLES AND REPAIR

- 53 -

DIP SWITCH SETTING

No S/W 1 S/W 2 S/W 3 WATER SUPPLY TIME REMARKS

1 OFF OFF OFF 6.5 Sec. 2 ON OFF OFF 5.5 Sec. 3 OFF ON OFF 6 Sec. 4 ON ON OFF 7 Sec. 5 OFF OFF ON 7.5 Sec. 6 ON OFF ON 8 Sec. 7 OFF ON ON 9 Sec. 8 ON ON ON 10 Sec.

* The quantity of water supplied

depends on DIP switch setting conditions and water pressure as it is a direct tap water connection type. (the water supplied is generally 80 cc to 120 cc)

* DIP switch is on the main PWB.

2-4. Ice Ejection Control Function

1. This is to eject ice from ice maker cube mould after ice making is completed.

2. If Hall IC signal is on within 3.6 seconds after ice ejection motor rotates in normal direction, it does not proceed ice ejection but waits. If the ice bank is full, ice ejection motor rotates in normal direction in every hour to check the condition of ice bank. If the ice bank is not full, the water supply control starts after completion of ice ejection control. If the ice bank is full, ice ejection motor rotates in reverse direction and sops under ice making or waiting conditions.

3. If ice bank is not full, ice ejection starts. The cube mould tilts to the maximum and ice is separated from the mould and ice checking lever raises.

4. Ice ejection motor stops for 1 second if Hall IC signal changes from OFF (low) to ON (high) after 3.6 seconds when ice ejection motor rotates in normal direction. If there is no change in Hall IC signals within 1 minute after ice ejection motor operates, ice ejection motor stops as ice ejection motor or hall IC is out of order.

5. If ice ejection motor or Hall IC is abnormal, ice ejection motor rotates in normal direction to exercise initial operation. It resets the ice maker if ice ejection motor or Hall IC is normal.

6. The mould stops for 1 second at maximum tilted conditions.

7. The mould returns to horizontal conditions as ice ejection motor rotates in reverse direction.

8. When the mould becomes horizontal, the cycle starts to repeat: Water Supply → Ice Making → Ice Ejection → Mould Returns to Horizontal

ICE MAKER AND DISPENSER WORKING PRINCIPLES AND REPAIR

- 54 -

Bank is

not full

HALL IC

OUTPUT

SIGNALS

Bank is

full

HALL IC

OUTPUT

SIGNALS

ICE CHECKING

AXIS

ICE CHECKING LEVEL 30°

Maximum tilting

point

Ice making

(Original point)

Lock

2±1 sec

9±3 sec 8±3 sec

Ice Checking Ice Ejection

Lock

Horizontal

Conditions

Level Retrun

Conditions

2-5 Test Function

1. It is to force the operation during operation test, service, and cleaning. The test switch is mounted under the automatic ice maker. The test function starts when the test switch is pressed for more than 0.5 second.

2. Test button does not work during ice ejection and water supply. It works when it is in the horizontal conditions. If mould is full of ice during test function operation, ice ejection control and water supply control do not work.

3. When test switch is pressed for more than 0.5 second in the horizontal conditions, ice ejection starts irrespect of the mould conditions. Water shall be splashed if test switch is pressed before the water in the mould freezes. Water shall be supplied while the mould returns to the horizontal conditions after ice ejection. Therefore the problems of ice ejection, returning to the horizontal conditions, and water supply can be checked by test switch. When test function performs normally, buzzer sounds and water supply shall carry out. Check it for repair if buzzer does not sound.

4. When water supply is completed, the cycle operates normally as follows: Ice making → Ice ejection → Returning to horizontal conditions → Water supply

5. Remove ice from the ice maker cube mould and press test switch when ice maker cube mould is full of ice as ice ejection and water supply control do not work when cube mould is full of ice.

2-6. Other functions relating to freezer compartment door opening

1. When freezer door is open, ice dispenser stops in order to reduce noise and ice drop.

2. When freezer door is open during ice ejection and cube mould returning to horizontal condition, ice ejection and cube mould level return proceed.

3. When freezer door is open, geared motor and cube ice solenoid immediately stop and duct door solenoid stops after 5 seconds.

4. Water dispenser stops in order to protect water drop when freezer door is open.

5. Test function operates normally irrespect of refrigearator compartment door opening.

ICE MAKER AND DISPENSER WORKING PRINCIPLES AND REPAIR

- 55 -

3. Ice Maker Troubleshooting

* Troubleshooting: it is possible to confirm by pressing freezer and refrigerator temperature control buttons for more

than 1 second. (ice maker is normal if all leds are on): refer to trouble diagnposis function in MICOM function 2-8 (page 18)

ICE MAKER AND DISPENSER WORKING PRINCIPLES AND REPAIR

- 56 -

Yes

Is DC Power (5V and 12V)

output normal?

Failed DC Power

• Check DC power (5V, 12V).

Change main PWB

Is cube ice led off during

troubleshooting check?

Failed ice making sensor

• Check the resistance of both ends (3,4) of ice making sensor of CON9.

• Defects between ice making sensor and board (Pin No. 58 of IC1)

Replace Ice making Sensor

Is Crushed Ice LED off during

troubleshooting check?

Failed Ice Maker Unit

• Is the resistance of both ends of ice ejection motor of CON9 between 18 and 22Ω?

• Is ice ejection motor drive circuit (IC11 and peripheral circuits) normal?

• Defects between Hall IC and Board (Pin No. 44 of IC1).

• Confirm ice ejection and level return when pressing test switch.

Replace Ice Maker Unit

Replace Main PWB

Are ice

ejection and level return

normal when test switch is

pressed for more than 0.5 second?

Does the bell

sound once?

Failed ice maker unit test switch

• Are both ends of CON9 test switch open?

• Defects between test switch and board (Pin No. 45 of IC1).

• Are both ends (5,6) of CON9 ice maker stop switch short?

Replace Ice maker Unit

Replace water supply valve

• Is power applied to water supply valve?

• Does the water supply valve work normally?

• Is the water supply line normally connected?

Poor water supply

Is water suppy normal

after Ice ejection and level return

by ice ejection motor?

Normal

4. Ice Maker Circuits

The above ice maker circuits are applied to GR-P247, GR-P207 and GR-L247, GR-L207 and composed of ice maker unit in the freezer and ice maker driving part of main PWB. Water is supplied to the ice maker cube mould through the solenoid relay for ice valve of solenoid valve in the machine room by opening valve for the set time. Water supply automatically stops when water supply time is elapsed. This circuit is to realize the functions such as ice ejection of ice maker cube mould, ice full detection, leveling, ice making temperature detection, etc. Refer to the temperature detecting circuits of Main PWB for ice making temperature detection. Ice maker test switch input detection is the same as the door switch input detection circuit of main PWB.

1. It is to force to operate during operation test, service, and cleaning. The test switch is mounted under the automatic ice maker. The test function starts when the test switch is pressed for more than 0.5 second.

2. Test button does not work during ice ejection and water supply. It works when it is in the horizontal conditions. If cube mould is full of ice during test function operation, ice ejection control and water supply control do not work.

3. Ice ejection carries out irrespect of ice formation in the ice making tray if test switch is pressed for more than 0.5 second. Water shall be splashed if test switch is pressed before the water in the mould is completely frozen. Water shall be supplied while the mould returns to the horizontal conditions after ice ejection. Therefore the problems of ice ejection, leveling, and water supply can be checked by test switch. When test function performs normally, buzzer sounds and water supply shall carry out. Check it for repair if buzzer does not sound.

4. When water supply is completed, normal cycle works: Ice Making → Ice Ejection → Level Return → Water Supply.

5. If ice maker stop switch is set to ON, normal cycle operates: Ice Making → Ice Ejection → Level Return → Water Supply. If it is set to OFF, ice making conducts but ice ejection, level return, and water supply do not work.

ICE MAKER AND DISPENSER WORKING PRINCIPLES AND REPAIR

- 57 -

FOWARD

REVERSE

ICE MAKER STOP SWITCH

CIRCUIT

- 58 -

GR-B247, GR-B207, GR-C247, GR-C207, GR-B197

CIRCUIT

- 59 -

GR-P247, GR-P207, GR-L247, GR-L207

• HOME BAR PART(H/BAR-HEATER, DOOR S/W) SOLENOID WATER VALVE, CAPACITOR PART, THE PLUG TYPE, COMPRESSOR EARTH PART ON CIRCUIT DIAGRAM ARE SUBJECT TO CHANGE IN DIFFERENT LOCALITES AND ACCORDANCE WITH MODEL TYPE.

1. TROUBLE SHOOTING

TROUBLE DIAGNOSIS

- 60 -

CLAIMS. CAUSES AND CHECK POINTS. HOW TO CHECK

1. Faulty start

1) No power on outlet.

2) No power on cord.

3) Shorted start circuit.

4) During defrost.

* 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

■ 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 : ∞.

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.

No power on power cord.

O.L.P is off.

No electric power on compressor. - Faulty compressor .

Faulty PTC.

Disconnected copper wire.

Internal electrical short.

Faulty terminal contact.

Disconnected.

Capacity of O.L.P is small. Characteristics of O.L.P is bad. Bad connection.

Power is disconnected.

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

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

Loose contact.

- Large distance between male terminal.

- Thin female terminal.

T erminal disconnected. Bad sleeve assembly .

Power cord is disconnected. Faulty soldering.

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

was produced.

Power does not conduct. - Damage. Bad characteristics. - Initial resistance is big. Bad connection with

compressor. Bad terminal connection.

T oo loose. Assembly is not possible.

TROUBLE DIAGNOSIS

- 61 -

CLAIMS. CAUSES AND CHECK POINTS. HOW TO CHECK

2. No cooling.

2) Refrigeration system is clogged.

■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.

Moisture clogged.

No electric power on thermostat.

Weld joint clogged.

Drier cloggeing.

Foreign material clogging.

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.

Caps are missed.

Air blowing.

During transportation. During work.

Not performed. Performed.

T oo short time. Low air pressure. Less dry air.

Air Blowing.

Leave it in the air. Caps are missed.

Short pipe insert. Pipe gaps.

T oo much solder .

T oo large. Damaged pipes.

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

During rest time. After work.

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

Not performed. T oo short. Impossible moisture

confirmation. Low air pressure.

Dry drier - Drier temperature. Leave it in the air.

The capillary tube inserted depth. - T oo much. Capillary tube melts. - Over heat. Clogged with foreign materials.

Reduced cross section by cutting. - Squeezed.

Desiccant powder. Weld oxides. Drier angle.

Check on package condition.

Good storage after finishing.

TROUBLE DIAGNOSIS

- 62 -

CLAIMS. CAUSES AND CHECK POINTS. HOW TO CHECK

3. Refrigeration is weak.

Plate heater

Cord heater

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.

Inject through the hole.

Seal with drain.

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

input.

Parts disconnected.

Wire is cut.

- Heating wire.

- Contact point between heating and electric wire.

Dent by fin evaporator. Poor terminal contacts.

Wire is cut.

- Lead wire.

- Heating wire.

- Contact point between heating and electric wire.

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= —

- 63 -

TROUBLE DIAGNOSIS

CLAIMS. CAUSES AND CHECK POINTS. HOW TO CHECK

3. Refrigeration is weak.

3) Cooling air leak.

4) No cooling air circulation.

Residual frost.

No automatic defrosting. Defrost does not return.

Bad gasket adhestion

Door sag.

Faulty fan motor.

Weak heat from heater.

Bad heater assembly .

T oo short defrosting time. Defrost Sensor.

- Faulty characteristics. Seat-D(missing, location. thickness).

Structural fault. Gasket gap.

Air inflow through the fan motor. Bad insulation of case door.

Sheath Heater - rated. Heater plate - rated. Heater cord-L - rated.

Heater plate

Heater cord-L

Gap. Bad attachment. Contraction.

Bad adhesion. Weak binding force at hinge.

Fan motor.

Door switch.

Self locked. Wire is cut. Bad terminal contact.

Contact distance. Button pressure. Melted contact. Contact.

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

Faults.

Refrigerator and freezer switch reversed. Button is not pressed.

No contact to drain. Loosened stopper cord.

Not contact to the evaporator pipe.

Location of assembly (top and middle).

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

TROUBLE DIAGNOSIS

- 64 -

CLAIMS. CAUSES AND CHECK POINTS. HOW TO CHECK

3. Refrigeration is weak.

4) No cooling air circulation.

5) Compressor capacity.

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.

Faulty fan motor.

Small cooling air discharge.

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

Rating misuse. Small capacity. Low valtage.

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

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

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.

TROUBLE DIAGNOSIS

- 65 -

CLAIMS. CAUSES AND CHECK POINTS. HOW TO CHECK

4. Warm refrigerator compartment temperature.

5. No automatic operation. (faulty

contacts.)

6. Dew and ice formation.

1) Colgged cooling path.

2) Food storate.

1) Faulty temperature sensor in freezer or refrigerator compartment.

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."

1) Ice in freeezer compartment.

2) Condensation in the refrigerator compartment.

3) Condensation on liner foam.

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

Faulty contact. Faulty temperature characteristics.

External air inflow. –– Rubber motor assembly direction(reverse). Door opens but not closes.

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

fully inserted.

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

Door opens but not closes.

Gasket gap.

Cool air leak and transmitted.

High ambient temperature. Space is secluded.

Different rating. Small capacity.

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.

T oo much food. Hot food.

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

Insufficient closing. Door sag. Food hinders door closing.

T oop table part. Out plate R/L part.

Not fully filled.

Flange gap. –– Not sealed. Gasket gap.

■Inspect parts measurements and check visually.

TROUBLE DIAGNOSIS

- 66 -

CLAIMS. CAUSES AND CHECK POINTS. HOW TO CHECK

6. Dew and ice formation.

7. Sounds

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.

Cormer.

P/U liquid contraction.

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.

Breaks, holes. Small Capacity.

Position of drain.

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.

Chattering

sound.

Insulation paper vibration.

Capacitor noise.

Pipe contacts each other. – Narrow interval.

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

Damping rubber-S.

Capillary tube unattached.

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

Bad wing adhesion. Wing sag(lower part).

Door liner shape mismatch.

Corner. T oo much notch.

Broken.

Home Bar heater is cut.

Liquid shortage. Liquid leak.

TROUBLE DIAGNOSIS

- 67 -

CLAIMS. CAUSES AND CHECK POINTS. HOW TO CHECK

7. Sounds

1) Compressor compartment operating sounds. Transformer

sound.

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.

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.

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.

Aged rubber seat. Bad torque for assembling motor bracket.

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

Unbalance.

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

rubber assembly.)

Supporter disorted. Tilted during motor assembly .

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

accumulator. Sound from fin evaporator and pipe during expansion and contraction.

Poor treatment Cord heater. Narrow evaporator interval.

Surface machining conditions. Fan distortion. Misshappen. Burr.

TROUBLE DIAGNOSIS

- 68 -

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.

TROUBLE DIAGNOSIS

- 69 -

CLAIMS. CAUSES AND CHECK POINTS. HOW TO CHECK

10. Structure, appearance and others.

1) Door foam. Sag.

Noise during operation.

Malfunction.

2) Odor. Temperature of

refrigerator compartment.

Deodorizer.

Food Storage.

Others.

Weak torque of hinge connection.

Weak gasket adhesion. Fixed tape.

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.

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

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.

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

Not well fixed.

2. Faults

2-1. Power

2-2. Compressor

TROUBLE DIAGNOSIS

-70-

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).

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,

evacuate, and recharge refrigerant.

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

contacted.

Auxiliary winding

Main winding

Power

2-3. Temperature

-71-

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.

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.

2-4. Cooling

-72-

Problems Causes Checks Measures Remarks

High Refrigerant leak. Check sequence

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

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.

TROUBLE DIAGNOSIS

-73-

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.

2-5. Defrosting failure

-74-

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.

(V: Rated voltage of user country)

(R: Resistance of tester[Ω])

Compare P and lavel capacity.

Tolerance: ±7%

P= ––

TROUBLE DIAGNOSIS

-75-

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

with a new one.

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).

2-6. Icing

-76-

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)

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.

TROUBLE DIAGNOSIS

-77-

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.

- Check icing at intake port of

- 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.

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.

2-7. Sound

-78-

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.

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.

TROUBLE DIAGNOSIS

-79-

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)

Explain the principles of refrigeration

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

and that the temperature difference

shelves, and pipes in the

between operation and defrosting

refrigerator.

can make sounds.

If evaporator pipe contacts with other

structures, leave a clearance between

them (freezer shroud or inner case).

-80-

Problems Causes Checks Measures Remarks

Sound "Burping" It happens when refrigerant expands

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

(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

- 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.

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

accumulator with foam and restrainer.

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.

2-8. Odor

TROUBLE DIAGNOSIS

-81-

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.

2-9. Micom

TROUBLE DIAGNOSIS

-82-

Problems Symptom Causes Checks Measures Remarks

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

electric power. LEDS 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.

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

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

module. 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.)

TROUBLE DIAGNOSIS

-83-

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 CON5 Replace relay(RY1 Refer to load

driving relay. (3&9) after pressing main PCB and RY14) 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

(freezer,

driving circuits in

home bar). motor after pressing test switch

refrigerator

and circuit

• 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. • Replace relay(RY5

& RY6) or PCB.

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

functions. diagnosis

function.

TROUBLE DIAGNOSIS

-84-

Problems Symptom Causes Checks Measures Remarks

Bad cooling Wrong Defective AC Damper. Check AC damper Check if AC damper motor and Reconnect lead

Refrigerator motor and reed switch reed switch lead wire are wire.

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

Check AC damper Refer to AC damper in parts Replace AC damper

part. repair guide. or refrigerator control

box Assy.

Check AC damper Refer to AC damper in parts Replace relay or Refer to single

Motor driving relay in repair guide. PCB. motor damper

PCB. driving circuits

in circuit

explanation.

Foreign materials in AC Check AC damper baffle Remove foreign

damper baffles visually. materials.

Ice formation on AC Check if AC damper Heater Replace AC damper

damper baffles wire is cut with a tester. or refrigerator control

Box Assy.

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

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

characteristic

table in circuit

explanation.

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.

TROUBLE DIAGNOSIS

-85-

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 CON5 (1 and 7) Replace relay (RY 7 Refer to load

with a tester after pressing main and RY 14) 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.

TROUBLE DIAGNOSIS

-86-

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 (RY9, RY11, 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 (RY10) with a tester Replace defective

dispense. relay.

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

dispenser. parts.

3. Cooling Cycle Heavy Repair

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

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

TROUBLE DIAGNOSIS

- 87 -

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

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

Drier:within into the pipe is dangerous).

20 minutes.

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

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

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

2 pressure: during welding.

0.1~0.2 kg/cm

) - Do not apply force to pipes before and

after welding to protect pipe from cracking.

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

leak. sounds when moisture noise when removing rubber cap blow

removing rubber penetration. dry air or N

2 gas for more than 1 min

cap. use the parts. Sound:usable No sound:

not usable

Refrigeration

Evacuation

Min. More than To remove

Cycle. time 40 minutes. moisture.

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

degree equipped with reverse flow protect

plate.

Vacuum EA High and low Vaccum efficiency can be improved by

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

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

manifold. mineral and refrigerant(causes of leak).

ester oils.

Pipe EA Use R134a To protect

coupler cxclusive. R12 Refri-

gerant mixing.

Outlet R134a exclusive.

(Socket)

Plug R134a exclusive

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

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.

6 Drier replacement. -

Use R134a exclusively

To remove

for R134a refrigerator

the moisture

Use R12 exclusively

from pipe.

for R12 refrigerator

Replace drier whenever repairing refrigerator cycle piping.

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

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

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

3-2. Summary Of Heavy Repair

TROUBLE DIAGNOSIS

- 88 -

Process Contents Tools

- 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

2 gas

- Confirm N

2 sealing and packing conditions before use.

Use good one for welding and assembly.

- Weld under nitrogen gas atmosphere.(N

2 gas pressure:

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:113

l/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

- 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.)

Trouble

diagnosis

Remove refrigerant

Residuals

Parts

replacement

and welding

Compressor

compartment

and tools

arrangement

Transportation

and

installation

Check

refrigerant leak

and cooling

capacity

Vacuum

Refrigerant

charging and

charging

inlet welding

3-3. Precautions During Heavy Repair

TROUBLE DIAGNOSIS

- 89 -

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.)

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.

Compressor

Evaporator

Drier

Low pressure side

Condenser

High pressure side

3-4. Practical Work For Heavy Repair

TROUBLE DIAGNOSIS

- 90 -

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.

When replacing a drier:

Weld

a and b parts by blowing nitrogen(0.1~0.2kg/cm2) to high pressure side after

assembling a drier.

When replacing a compressor:

Weld a and b 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.

3. Replacement of drier.

Inserting a capillary tube

Measure distance with a ruler and put a mark(12

+3/-0

)on the capillary tube. Insert tube to the

mark, and weld it

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.

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.)

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

TROUBLE DIAGNOSIS

- 91 -

Items Precautions

4.Vacuum degassing.

Pipe Connection

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

Vacuum Sequence

Open a, b valves and evacuate for 40 minutes. Close valve a.

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.

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.)

KEYPOINTING

- Be sure to charge the refrigerant at around 25°C.

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

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

Calculation of amount of refrigerant charged

Blue

Evaporator

Drier

2 1

Low

pressure

Yellow

Compressor

Suction pipe

Condenser

Vaccum

Pump

High

pressure

Red

Indicate the weight of an evacuated bombe

R134a

3-5. Standard Regulations For Heavy Repair

TROUBLE DIAGNOSIS

- 92 -

Items Precautions

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

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.

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.)

-0

Evaporator

Compressor

Drier

Condenser

Bombe

Rubber

Molecular Sieves

12 mm

Drier

Molecular Pipe

-0

3-6. Brazing Reference Drawings

TROUBLE DIAGNOSIS

- 93 -

PIPE ASSY, JOINT

PIPE ASSY, HOT LINE

(Freezer)

PIPE ASSY, HOT LINE

(Refrigerator)

PIPE ASSY, JOINT

CONDENSER ASSY, WIRE

PIPE ASSY, SUCTION

DRIER ASSYCAPI - TUBE

Copper Brazer

Silver Brazer

Copper Brazer

Coppper Brazer

Silver Brazer

Copper Brazer

4. HOW TO DEAL WITH CLAIMS

4-1. Sound

TROUBLE DIAGNOSIS

- 94 -

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.

TROUBLE DIAGNOSIS

- 95 -

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.

4-2. Measures for Symptoms on Temperature

TROUBLE DIAGNOSIS

- 96 -

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.

4-3. Odor and Frost

TROUBLE DIAGNOSIS

- 97 -

Problems Checks and Measures

Odor in the refrigerator compartment.

■ 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”.

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

• 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.

4-5. Others

TROUBLE DIAGNOSIS

- 98 -

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 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.

The front side should

be raised a little bit higher

than the rear side.

1. DOOR

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

• Pull a water supply tube b forward while pressing a 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.

(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.

(3) Disconnect upper hinge a from a hinge supporter b

by grasping the front part of upper hinge and lifting up (Hinge Assy, 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 a in arrow direction and

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

Note :

• Lift up a freezer door until a water supply tube is fully taken out.

(5) Assembly is the reverse order of disassembly

HOW TO DISASSEMBLE AND ASSEMBLE

- 99 -

Cover, Hinge

Connecting

Line

Earthing

Cord

Lever, Hinge

2. HANDLE

1) Put blade screwdriver into a groove on the side of a Deco handle and lift up a little bit in arrow a direction and push up with hand in arrow b direction and disconnect.

2) Put blade screwdriver into a groove on the side of a DECO handle and lift up in arrow direction c and push down with hand in arrow direction d and disconnect.

3) Push up a piece handle c in arrow direction with hand and disconnect.

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

4. ICEMAKER ASSY

1. Dispenser Model

1) How to disassemble: (1) Remove ice bank from the freezer compartment. (2) Loosen two screws on the upper part of icemaker

bracket.

(3) Disconnect icemaker bracket so that it can slide

forward. (4) Disconnect icemaker housing and sensor housing. (5) Disconnect icemaker horizontally by pressing bracket

hook part. ( Don’t disassemble further. The set value

may be changed.)

2) How to assemble : The assembly is the reverse order of the above disassembly.

Note :

When the ice tray is not horizontal after assembly, assembly must be wrong. Check and assemble again.

HOW TO DISASSEMBLE AND ASSEMBLE

- 100 -

Handle, Deco

Handle, Piece

Screw

Bracket, Ice Maker

Hook

Ice Maker Unit

Lever

Tray, Ice

Sensor

Insulation

Cover, Sensor

LG LRSPC2031xx Service Manual

Specifications and Main Features

Frequently Asked Questions

User Manual