LG LRSP2031BS User Manual REFRIGERATOR Manuals And Guides L0301007

LG Side by Side Refrigerator Manual L0301007 LG Side by Side Refrigerator Owner's Manual, LG Side by Side Refrigerator installation guides

User Manual: LG LRSP2031BS LRSP2031BS LG REFRIGERATOR - Manuals and Guides View the owners manual for your LG REFRIGERATOR #LRSP2031BS. Home:Kitchen Appliance Parts:LG Parts:LG REFRIGERATOR Manual

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Page Count: 95

WARNINGS AND PRECAUTIONS FOR SAFETY

Please observe the following safety precautions in order to

use safely and correctly the refrigerator and to prevent

accident and danger during repair.

1. Be care of an electric shock, Disconnect power cord

from wall outlet and wait for more than three minutes

before replacing PWB parts. Shut off the power

whenever replacing and repairing electric components.

2. When connecting power cord, please wait for more than

five minutes after power cord was disconnected from the

wall outlet.

3. Please check if the power plug is pressed down by the

refrigerator against the wall. If the power plug was

damaged, it may cause fire or electric shock.

4. If the wall outlet is over loaded, it may cause fire, Please

use its own individual electrical outlet for the refrigerator.

5. Please make sure the outlet is properly earthed,

particularly in wet or damp area.

6. Use standard electrical components when replacing

them.

7. Make sure the hook is correctly engaged,

Remove dust and foreign materials from the housing

and connecting parts.

Do not fray, damage, machine, heavily bend, pull out,

or twist the power cord.

Please check the evidence of moisture intrusion in the

electrical components. Replace the parts or mask it

with insulation tapes if moisture intrusion was

confirmed.

10. Do not touch the icemaker with hands or tools to

confirm the operation of geared motor.

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

reconstruct the refrigerator for themselves. It may

cause accident, electric shock, or fire.

12. Do not store flammable materials such as ether,

benzene, alcohol, chemicals, gas, or medicine in the

refrigerator.

13. Do not put flower vase, cup, cosmetics, chemicals,

etc,, or container with full of water on the top of the

refrigerator.

14. Do not put glass bottles with full of water into the

freezer, The contents shall freeze and break the glass

bottles.

15. When you scrap the refrigerator, please disconnect the

door gasket first and scrap it where children are not

accessible.

-3-

PARTS IDENTIFICATION

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

Frame Display

Dispenser Lamp

Dispenser Button

Cover Hinge Cover PWB

Door rack

ice maker

Shelf

(Steel,

TIGlass)

Drawer

or Shelf

(optional)

Freezer

Compartment

Refrigerator

Compartment f Milk product corner

Shelf

J Door rack

(optional)

Box

drawer

Shelf

rack

Lower Cover Conversion Switch

(MeatsNegetables)

Humidity Switch

drawer/Meat drawer

-14-

HOW TO INSTALL REFRIGERATOR

1. How to Adjust Door Height of Refrigerator

•Make the refrigerator levelfirst. (If the refrigerator is notinstalled on the flat floor, the height of freezer and refrigerator

door may not be the same.)

1. If the height of freezer door is lower than that of

refrigerator compartment :

2. If the height of freezer door is higher than that of

refrigerator compartment :

Height

Difference' Height

Difference

Insert a driver 0 into the groove Oof adjusting screw

and rotate driver in arrow direction (clockwise) until the

refrigerator becomes horizontal.

Insert a driver 0 into the groove O of adjusting screw

and rotate driver in arrow direction (clockwise) until the

refrigerator becomes horizontal.

-18-

HOW TO INSTALL REFRIGERATOR

2. How to Install Water Pipe

•Before Installation

1. The icemaker requires the water pressure of 1.5

8.5kgf/cm 2. (It is acceptable if city water fills acup of

180cc with water for 3 seconds)

2. Install booster pump where the city water pressure is

below 1,5kgf/cm 2 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,

Valve Feed Rubber, Packing Connector, Pipe

Connector, Pipe Tape, Teflon

Class,

Conve-

rtible

Water

Valve

Water

Conn-

ector

Shape and Spec.

Connector, (MECH) Pipe

Nomenclature

Valve Feed

Connector,(MECH) Pipe

ConversionConnector(3/4")

BalanceCenector(3/4")

Packing(e24x3t)

4932JA3003B

ConversionConnector(W25)

BalanceConectoor(W25)

Packing(e23x3t)

P/No

5221JA3001A

4932JA3003A

6631JA3004A

6631JA3004B

3920JA3001B

6631JA3004C

6631JA3004D

3920JA3001A

Remarks

Common Use

No Holes

Connector,(MECH) Pipe 4932JA3003C

ConversionConnector(W28) 6631JA3004E No Holes

BalanceConector(W28) 6631JA3004F

Packing(e26x3t) 3920JA3001C

No Holes

Connector,(MECH) Pipe

ConversionConnector(I/2")

BalanceConector(1/2")

Packing(e19x3t)

4932JA3003D

6631JA3004G

6631JA3004H

3920JA3001D

-19-

HOW TO INSTALL REFRIGERATOR

1. Connection of Pipe Connector A and B.

1) Turn off main valve of water pipe.

2) Disconnect water tap from piping by loosening nuts,

3) Connect pipe connector A and B to piping after sealing

the pipe connector with sealing tapes.

4) Connect feed valve to pipe connector A.

5) If there is only one tap water pipe, connect pipe

connector A only and install feed pipe.

Caution :•Feed pipe should be connected to cold water

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

may occur,

• Please check rubber packing when connecting

feed pipe.

Pipe Connector B

\\ \Valve

How to wind

Sealing Tapes.

Single Lever Type Faucet

(general)

Two Hands Type Faucet

Feed

Valve

General Type

Single Lever Type Faucet (one

hole, tech type and hand spray)

Feed

Valve

2. Water Supply

1) After the installation of feed water, plug the refrigerator

to the earthered wall outlet, press the water dispenser

button for 2 - 3 minutes, and confirm that the water

comes out,

2) Check leakage at connecting part, then arrange water

tube and locate the refrigerator at its regular place if

there is no leaking.

Water Tube

Nut

- 20 -

HOW TO INSTALL REFRIGERATOR

3. When customer uses bottled water.

*If customer wants to use bottled water, extra pump should be installed as shown below.

1. The pump system should not be on the floor (it may cause noise and vibration). Securely fasten the inlet and outlet

nuts of pump.

2. If there is any leakage after installation, cut the water tube at right angle and reassemble.

3, When put the water tube end into the bottle, leave a clearance between bottle bottom and water tube end.

4 Check water coming out and any leakage.

Caution :• If feed tube is more than 4m, less water will come out due to pressure drops.

• Use standard feed tube to prevent leaking.

•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.

Water Tube

Nut

Inlet

FixingPlate

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. Filter Inlet,\

Hot Water

Cold Water

Feed Valve

Water

-21 -

HOW TO INSTALL REFRIGERATOR

•Install Water Filter (Applicable to some models only)

•Before Installing water filter

1. Before installing the filter, take out the top shelf of the

refrigerator after tilting it to the direction (Q) and lifting it

to the direction (@) and move it to the lower part,

2. Remove the lamp cover by pressing the protrusion

under the cover and pulling the cover to the front.

IIl IIJ

•Installing water filter

1. Initial installation of water filter

Remove the filter substitute cap by turning it

counterclockwise ((D) by 90 degrees and pulling it down.

Note : Keep it safe to use it later when you do not use the

filter.

Remove the red cap from the filter and attach the

sticker. Insert the upper part of the filter ((!)) after

aligning with the guideline marked on the control box,

and fasten it by turning it clockwise by 90 degrees.

Note : Check that the guideline and the fastening

indication line are aligned.

Substitute

Separation _ _

of red cap____ _Aidchkes'i°n

2. Replacement of water filter

While holding the lower part of the filter, turn it

counterclockwise ((D) by 90 degrees and pull it down.

Note : Check that the guideline and the loosening

indication line are aligned.

Control box

Aligning with the guide line

and the fastening indication line

[11 q Contro,box

_'J_ Aligni_lgwith the guide line

and the loosening indication line

•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.

- 22 -

HOW TO INSTALL REFRIGERATOR

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

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)

Confirm the amount

of water

Too much -.

_-" -- Optimum level )

-.. -- _oo _lL_e ,,

Test Switch

ice maker

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

- 23 -

HOW TO INSTALL REFRIGERATOR

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

icemaker.

Caution : • Please unplug the power cord from the wall

outlet and wait for more than three minutes

before disconnecting PWB cover as 310V is

applied in the control panel.

1. Disconnect PWB cover from the upper part of the

refrigerator.

(+) Driver

2. Adjust the amount of water supplied by using DIP

switch.

Caution :When adjusting the amount of water supplied,

adjust step by step. Otherwise the water may

spill over.

Switch ON

Switch OFF

3. When adjustment of control switch for the amount of

water supplied is complete, check the level of water in

the ice tray.

Confirm the amount

of water

•Water Supplying Time Control Option

SWITCH NO Water Suppling

StWl 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.

"--~ _ Optimum level

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

refrigerator is delivered.

2) The amount of water supplied depends on the setting

time and water pressure (city water pressure).

3) If ice cube is too small, increase the water supplying

time. This happens when too small water is supplied into

the ice tray.

4) If ice cube sticks together, decrease the water supplying

time. This happens when too much water is supplied

into the ice tray.

- 24 -

MICOM FUNCTION

1. Monitor Panel

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

Function Monitor

®® ®..

/\ \_\

Freezer compartment Refrigerator compartment

temperature control Button temperature control Button

ax 5

Dispenser selection button

3 2 1 Min 1 2 3 45 Max

Q Q Q D D D D D

2. Description of Function

2-1. Funnction of Temperature Selection

Division

Change of

Indication Lamp

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

Temperature Medium Medium Max Max Min Medium Min

Control

Freezer -19 °C -22 °C -23 °C

Control (-18 °C) (-20.5 °C) (-22 °C) -15 °C -17 °C

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

Refrigeration 6 °C

Control 3 °C 1.5 °C O°C (7 °C) 4.5 °C

<2 °C> <1 °C> <O °C> <4.5 °C> <3 °C>

* The temperature call valy _3 °( depending on tile load condition. *( ) : 127V/60Hz, t t0~115V/60Hz, 115V/60HzRating 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

(GRIP247, GRIP207, GR_L247, GR-L207, GR-C247, GR_C207, GR-B247, GR-B207) when refrigerator or home bar

door is closed.

- 25-

MICOM FUNCTION

2-2. Automatic ice maker

• The automatic ice maker can automatically make 8 pieces of ice cube at a time, 80 pieces a day. But these quantities may

be varied according to various conditions including how many times the refrigerator door opens and closes.

• Ice making stops when the ice storage bin is full.

• If you don't want to use automatic ice-maker, change the ice-maker switch to ON-OFF.

If you want to use automatic ice-maker again, change the switch to OFF-ON.

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

2-3. When ice maker does not operate smoothly

Ice is lumped together

• When ice is lumped together, take the ice lumps out of the ice storage bin, break them into small pieces, and then place

them into the ice storage bin again.

• When the ice maker produces too small or lumped together ice, the amount of water supplied to the ice maker need to

adjusted. Contact the service center.

;{-"If ice is not used frequently, it may lump together.

Power failure

• Ice may drop into the freezer compartment. Take the ice storage bin out and discard all the ice then dry it and place it

back. After the machine is powered again, crushed ice will be automatically selected.

The unit is newly installed

• It takes about 12 hours for a newly installed refrigerator to make ice in the freezer compartment.

- 26 -

MICOM FUNCTION

2-4. Control of variable type of freezing room fan

1. To increase cooling speed and load response speed, MICOM variably controls freezing room fan motor at the high speed

of RPM and standard RPM.

2. MICOM only operates in the input of initial power or special freezing operation or load response operation for the high

speed of RPM and operates in the standard RPM in other general operation,

3. If opening doors of freezing /cold storage room or home bar while fan motor in the freezing room operates, the freezing

room fan motor normally operates (If being operated in the high speed of RPM, it converts operation to the standard

RPM). However, if opening doors of freezing room or home bar, the freezing room fan motor stops.

4. As for monitoring of BLDC fan motor error in the freezing room, MICOM immediately stops the fan motor by determining

that the BLDC fan motor is locked or poor if there would be position signal for more than 65 seconds at the BLDC motor.

Then it displays failure (refer to failure diagnosis function table) at the display part of refrigerator, performs re-operation in

the cycle of 30 minutes. If normal operation is performed, poor status is released and refrigerator returns to the initial

status (reset).

2-5. Control of M/C room fan motor

1. The M/C room fan motor performs ONIOFF control by linking with the COMP.

2. It controls at the single RPM without varying RPM.

3. Failure sensing method is same as in fan motor of freezing fan motor (refer to failure diagnosis function table for failure

display).

2-6. Door opening alarm

1. Buzzer generates alarm sound if doors are not closed even when more than a minute consecutively has passed with

doors of freezing /cold storage room or home bar opened,

2. Buzzer rings three times in the interval of 0.5 second after the first one-minute has passed after doors are opened and

then repeats three times of On/Off alarm in the cycle of every 30 seconds.

3. If all the doors of freezing /cold storage room or home bar are closed during door open alarm, alarm is immediately

released.

Doors of freezing /r_l i

cold storage room C_Openin_ Opening

or home bar I Closing

BUZZER

H:_

Within A minute

a minute

3Times3Times3Times3Times

: 30 i 30 i 30

secondssecondsseconds

2-7. Ringing of button selection buzzer

1. If pressing the front display button, "Ding -" sound rings.

2-8. Ringing of compulsory operation, compulsory frost removal buzzer

1. If pressing the test button in the main PCB, "Phi -" sound rings.

2. In selecting compulsory operation, alarm sound is repeated and completed in the cycle of On for 0.2 second and Off for

1.8 second three times.

3. In selecting compulsory frost removal, alarm sound is repeated and completed in the cycle of On for 0.2 second, Off for

0.2 second, On for 0.2 second and Off for 1.4 second three times.

- 27-

MICOM FUNCTION

2-9. Frost removal function

1. Frost removal is performed whenever total operation time of compressor becomes 7 - 7.5 hour.

2. In providing initial power (or returning power failure), frost removal starts whenever total operation time of compressor

becomes 4 - 4.5 hour.

3. Frost removal is completed if temperature of a frost removal sensor becomes more than 5°C after starting frost removal.

Poor frost removal is not displaced if it does not arrive at 5°C even if two hours have passed after starting frost removal.

4. No removal is done if frost removal sensor becomes poor (snapping or short-circuit).

2-10. Sequential operation of built-in product

Built-in products such as compressor, frost removal heater, freezing room fan, Cooling Fan and step motor damper are

sequentially operated as follows for preventing noise and part damage occurred due to simultaneous operation of a lot of

parts in applying initial power and completing test.

Function Load Operation Sequence Remark

When temperature

of a frost removal

sensorbecomes

morethan 25°0

(In purchase,

movement)

When

__ temperature of a

"_- frost removal

sensor becomes

Iess than 25°0

_-- (In power failure,

service)

Test mode 1

(Compulsory

function)

Test mode2

(Compulsoryfrost

removal)

0.5 0.3 F-FAN 03 STEP 03 HOME

POWER sec COMP sec &sec MOTOR sec BAR

C-FAN DAMPER HEATER

ON ON ON ON ON

05 FROST 8FROST 03 HOME 5HOME

POWER sec REMOVAL sec REMOVAL sec BAR sec BAR

HEATER HEATER HEATER HEATER

ON ON OFF ON OFF

WATER

03 WATER 5 WATER 03 SUPPLY 5 03 F-FAN

sec. sec. &sec. COMP sec.

_ec TANK _TANK _ _ _ &

HEATER HEATER DISPENSE C-FAN

ON OFF HEATER ON ON

0.3 03 F-FAN 03 STEP

TEST OTHER sec COMP sec &sec MOTOR

S/W _ LOAD _ _

(Press OFF ON C-FAN DAMPER

Once) ON OPEN

0.3 F-FAN 0.3 FROST 0.3 STEP

TEST COMP sec. sec.

S/W _ _ &_REMOVAL%MOTOR

(Press OFF C-FAN HEATER DAMPER

2 times) OFF ON CLOSE

If erroroccurs

during operation,

initialoperation is

notdone.

If pressing switch

once more in the

test mode 2 or

temperature of a

frost removaI

sensor ismore

than 5°C, it

immediately

returns to the test

mode for initial

operation

(COMP operates

after 7 minutes).

- 28 -

MICOM FUNCTION

2-15. Failure Diagnosis Function

1. Failure diagnosis function is function to facilitate service when nonconforming matters affecting performance of product

during use of product.

2. In occurrence of failure, pressing the function adjustment button does not perform function and only alarm sound ("Ding-") rings.

3. If nonconforming matters occurred are released during display of failure code, MICOM returns to the original state (Reset).

4. Failure code is displayed on the display part of setting temperature for the freezing room and the display part of setting

temperature for the cold storage room of LED, which are placed at the display part of a refrigerator. All the LED graphics

other than a failure code are turned off.

GR-B(C)207,247*CA

TROUBLE CODE INDEX

r 7 K_7

F4 F3 F2 F1

Max !S 4 3 2]l_M_n 1_2 _4N Max

LI i i mllmj _l • B B

GR-P(L)207,247.RA(O.A)

-_- :On • :Off ©:Normal

TroubleCodeIndicator Operation Status DuringTrouble

No, Trouble items Troubles Freezer Cooling Defrost Stepping

F4 F3 F2 Ff Compressor Fan Fan Heater MotorDamper

1 sensorAbn°rmalfreezer(F) • • •-_6- circuitedFreezersensoris cut or short- 115minoff5rainon/ StandardRPM © O ©

2 Abnormal Uppershelf refrigeratorsensor is O Standard O O Openfcr/

refrigeratorsensor • •-¢-

I(Rf) (uppershelf • cut orshort-circuited. RPM

in the refrigerator)

3 Abnormal Note 1) Lowershelf refrigeratorsensor is © Standard © © ©

refrigeratorsensor cut orshort-circuited. RPM

2(R2)(lower shelfin

the refrigerator)

4 Abnormaldefrost • _A_ • • Defrostsensoris cut or short- © Standard © No defrost ©

sensor Y circuited RPM

5 Faultydefrost Defrostheater andtemperature © Standard © © ©

_¢__¢___¢_ fuse are cut and disconnected. RPM

(Indicatesafter at leastfour hours

when troublesoccur)

6 Abnormalfreezer No position-signalover 65s when O 0FF(ch_ O O O

BLDCfan motor _¢_ • • _¢_ fan motor operate @eat;®per

30mi_7,_fn0rmal

c0ndr_®,reset}

7 Abnormalcooling No position-signalover 65s when © O 0FF(ch_ O ©

BLDCfan motor • • _1(_¢_ fan motor operate @eat;®per

30mi_7,_fn0rmal

®ndr_®,reset}

8 Abnormalroom Note 1) Roomtemperaturesensor(RT- O O O O O

temperaturesensor Sensor) is cat or short-circuited.

9 Abnormalicemaker Note 1) Icemakersensoriscut orshort- © O O O O

sensor circuited.

10 Abnormalicemaker Note 1) Faultymotor or hall ICin © Standard © © ©

unit icemakerunit.Leadwire is cut or RPM

shotr-circuited.Faulty motor

driving circuits

- 29 -

MICOM FUNCTION

Note1) The abnormality of RT-Sensor, R2-Sensor Icemaker Unit, and Icemaker-Sensor is not indicated in trouble code but it

is indicated when checking LED (when pressing both freezer temperature control button and refrigerator temperature

control button for more than 1 second at the same time).

RT-Sensor

R2-Sensor

Icemaker Unit

Icemaker Sensor

Normal : (_ LED on,

Normal : _) LED on,

Normal : (_ LED on,

Normal : _) LED on,

Abnormal : (_) LED Off.

Abnormal : (_ LED Off.

Abnormal : (_ LED Off,

Abnormal : (_) LED Off.

The rest of LEDs

are all on.

2-16. Test Function

1. The purpose of test function is to check function of the PCB and product and to search for the failure part at the failure

status.

2. Test button is placed on the main PCB of refrigerator (test switch), and the test mode will be finished after maximum 2

hours irrespective of test mode and then is reset to the normal status.

3. Function adjustment button is net perceived during performance of test mode but only warning sounds ring.

4. In finishing test mode, always pull the power cord out and then plug-in it again for the normal state.

5. If nonconforming contents such as sensor failure are found during performance of test mode, release the test mode and

display the failure code.

6. Even if pressing the test button during failure code display, test mode will not be performed.

MODE

Test 1

Test 2

HANDLING

Press TEST s/w once.

Press TEST s/w once at

TEST1 conditions.

CONTENTS

1. Compressor continuously operates.

2. Freezer fan (high speed RPM), Cooling fan

continuously operates.

3. Defrost heater is off,

4. All display LEDs are on.

5. Stepping motor damper is in open

conditions. (baffle is open)

1. Compressor is off

2. Freezer fan, Cooling fan are off.

3. Defrost heater is on.

4. All display LEDs are off. (Freezer room "2"

LED and Refrigerator room "2" LED are

only ON.)

5. Stepping motor damper is in closed. (baffle

is closed).

REMARKS

- Forced operate.

- Freezer fan is off when

door is opened.

- It returns to normal

conditions when the

temperature of defrost

sensor is above 5°C.

- Forced defrost.

Normal Press TEST s/w once at Returns to the initial conditions. Compressor starts after

Conditions TEST2 conditions, seven minutes delay.

- 30 -

EXPLATION FOR MICOM CIRCUIT

1. Explanation for PWB circuit

%1. Power circuit

1, GR-L207ERA, GR-L247ERA, GR-B207ERA, GR-B247ERA

Power circuit consists of SMPS (SWITCHING MODE POWER SUPPLY) power. The SMPS consist of the rectifying part

(BD1, CE1) converting AC voltage to DC voltage, the switching part (IC2) switching the converted DC voltage, transformer

transferring energy of the primary side of the switching terminal to the secondary side and the feedback part (IC3, IC4)

transferring it to the primary side.

Caution :Since high voltage (DC310V) is maintained at the power terminal, please take a measure after more than 3

minutes have passed after removing power cords in the abnormal operation of acircuit.

Voltage of every part is as follows:

Part VA1 CE1 Vdc CE2

Voltage 220 Vac inspection 16 Vdc

CE3 CE4 CE

12 Vdc 15.5 Vdc 5 Vdc

CON1

BDI

RVB 1506

15DK,1W

VAI

_INR

pOWER

]RANS D3

1 F • I0 _3o2

FBI 2 I_ ,>>RF2KF

FRI02 R5 I K % ;CO+

I<_ 5 i +2 4 00v

I_ +33 I+CE3

<,R4 C 2IBS(]uF

"_7K IOOUF •I/2_V R_KF

4C7cl] 08RQlC_<" u - - 5£

43,48,51

IC1

(MICOM)

VDO

V_]ref

Vss

Wss

_ST

GNO

-31 -

EXPLATION FOR MICOM CIRCUIT

1-2. Oscillation circuit

Oscillation circuit is a circuit with the purpose of generating basic time for clock occurrence for synchronization and time

calculation in relation with information transmission/reception of inside elements of IC1 (MICOM). The OSC1 must always

use rated parts since if SPEC is changed, time calculated at the IC1 may be changed or no operation is done.

<GR-L207ERA, GR-L247ERA> <GR-B207ERA, GR-B247ERA>

50 XIN 30

(MICON o

XOUT

31 31

XIN

ICI

(HICON)

XOUT

1-3. Reset circuit

The reset circuit is circuit allowing various parts such as RAM inside of MICOM (IC1) to initialize and the whole of function to

start from the initial status, when initial power is input or when power is applied again to MICOM by aspontaneous power

failure. 'LOW' voltage is applied to the reset terminal of MICOM in the beginning of power supply for a constant time (10ms).

Reset terminal during general operation is 5V (No MICOM operates in failure of RESET IC).

<GR-L207ERA, GR-L247ERA> <GR-B207ERA, GR-B247ERA>

Tcg [C1 _ml [Cl

_T_ (MICOP1} IC7 (NICON

_" 4_4,7K 29

_3 t CCIO 29 RESET •CC8 RESET

104CCg f717104 m[7104

- 32 -

EXPLATION FOR MICOM CIRCUIT

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

1. LOAD DRIVING CIRCUIT

InEven if opening the door of freezing room or cold storage room during operation of fan motor at the freezing room, this

circuit does not stop and operates at the standard RPM. In addition, if doors of freezing room or cold storage room, the

fan motor normally operates at the RPM previously operated.

(A), (B), (C) and (D) of door switch for the freezing room or cold storage room are connected to the door open sensing

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

Since a door switch of the home bar is connected to door switch (C), (D) of the cold storage room, it senses door opening

if even one of both is opened.

The fan motor is immediately stop if opening doors of the freezing room or cold storage room at the TEST mode and it

immediately operates if closing them.

1) GR-L207ERA, GR-L247ERA

Frost Removal AC Converting Water Tank

Type of Load COMP R-room LAMP

Heater Relay Heater

Measuring part (IC6) No. 16 No. 15 No. 16 IC7-13 IC7-14

ON Within 1 V

Status OFF 12 V

COMP

DDDR S _7

PTC ASST

DEF HEATER

CON2

CON5

_4/TANK HEATER

H/BAR

DDDR S/'d R I]DDR S/'d CON4

R LAMP

CON5

H/BAR HEATER

pOWER

RY2

JWlaFHN

RY6

ALD112

RY9

OH] Q

D]3

RY12

_G5S ]A

D16

IC7

_k_OO3AP

IC1

(HICDH)

P73

(AIN13)

P72

(AIN12)

P76

(AIN16)

P01

PO#

- 33 -

EXPLATION FOR MICOM CIRCUIT

2) GR-B207ERA, GR-B247ERA

The fan motor at the freezing room does not stop but operates if opening doors of the freezing room or cold storage room

or the home bar during operation of the fan motor at the freezing room.

(A), (B), (C) and (D) of door switch for the freezing room or cold storage room are connected to the door open sensing

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

Since a door switch of the home bar is connected to door switch (C), (D) of the cold storage room, it senses door opening

if even one of both is opened.

Frost Removal AC Converting Homebar

Type of Load COMP R-room LAMP

Heater Relay Heater

Measuring part (IC7) No.10 No.ll No.12 No.14 No.16

ON Within 1 V

Status OFF 12 V

POWER

F LAMP 4

CON2

_UNNNG CAPADFOR

COMP

P.TC AS_

DEF HEATER

H/B4R R _UUR CON3

BBBR S/W S/W

P03

P06

IC1

- 34 -

EXPLATION FOR MICOM CIRCUIT

2. Dispenser operation circuit

DISPENSER

LEVER S/W

CON5

AUGER MOTOR

SOLENOID

CUBE

CON4

ICE

WA_R I

CONE

SOlYNOID

DISPENSER

PILOT VALVE

OlSP LAMP

POWER

CRI

RY4

JWloF74N

RY'a

ALD112

RY7

ALD112

Oll

RY8

ALS112

D12

RYIO

ALDll2

RYII

ALDI12

_@O7 _41€8

IC7

9 _D65003AP

I 8

15 2 9

13 4 11

"00

IC1

(NICDN}

"02

"03

"05

1) Check load driving status

Type of Load GEARED

MOTOR

SOLENOID

CUBE

WATER VALVE

ICE WATER

IC6-No.ll IC6-No.10

SOLENOID

DISPENSER

HOMEBAR

HEATER

SOLENOID

PILOT

Measuring part IC6-No.13 IC6-No.12 No.12 No.10 No.16

ON Within 1 V

Status OFF 12 V

2) Lever S/W sensing circuit

_ing ICl(Micom) (No. 16)

part

LeverS/W

On(Press) (60 Hz)

OFF 5V

- 35-

EXPLATION FOR MICOM CIRCUIT

3. Door opening sensing circuit

<GR-L207ERA, GR-L247ERA> <GR-B207ERA, GR-B247ERA>

P47

ICI

(NICOM) Q_

R62 C]06M

P52 _v_

P5;

_R4.* C] D6M

51 " _TKF 1

_ CONDITIONS

_ Bell sounds when button on Beep sounds when warning OFF

MEASURING_ dosplay is pressed, door opening.

POINTS _-_

,O.05s,, 0.2s ....,0.1s, 0.4s ,j !., 0.5s ,.!., 0.5s

5V -- "' 5V

IC1 (No. 48 Pin)

IC1 (No. 51 Pin)

0V --, , T

0 V ,2.63 kz (DING),..21 kz (DONG

0 V --,

0 V --,2.63kz(BEEP), OFF ',

<GR-L207ERA, GR-L247ERA> <GR-B207ERA, GR-B247ERA>

104_

_C21_

_ _ CON7 F 0OOR S/W

CON5

F OOOR S/W

H/_AR DOOR S/W

ROOOR S/W

Measuring part

Door of Freezing/ColdStorageRoom

Closing

Opening

IC1 (MICOM) No. 47, 46 Pin

5 V ((_)- _3), (_ (_. S/W at both ends are at Off status)

5 V ((_)_ _), (_ (_. S/W at both ends are at On status)

¢- Since door switch sensing switch (A), (B) are a separate switch even if the door switch of the freezing room normally

operates, they may fail to sense door opening in the failure of switch at both ends of (A) and (B) or in failure of the L/wire.

¢- Lamp does at the cold storage room not turn on if the door switch of the cold storage room fails to sense the door open

switch (c), (d) or the home bar switch.

- 36 -

EXPLATION FOR MICOM CIRCUIT

1-5. Temperature sensing circuit

1) GR-L207ERA, GR-L247ERA

zcl

P66

(AIN6)

P65

(AIN5)

P65

(41N3)

P64

(AIN4)

P67

(AIN7)

62 RF1 CON7

R30 _,_ 16.2KF F SENSOR

C 4I r

C015_ 2K D SENSOR

58 RSO

2vv\

C022 2X

5g R51

o023i

104

6o R92

CC24 2K

104 _

CC12_ 2K

RT SNR

CON8

R1 SENSOR

R2 SENSOR

CON9

ICE NAKER SENSOR

The above circuits are circuits attached to freezing room sensor or cold storage room sensor for adjusting setting

temperature at the freezing room and cold storage room, ice-making sensor for sensing water temperature in ice-making, or

an evaporator for sensing temperature of a frost removal sensor necessary for frost removal. Short or open status of every

temperature sensor is as follows:

SENSOR

Freezing sensor

Frost removal sensor

Cold storage sensor 1

Cold storage sensor 2

Ice making sensor

Room temperature sensor

CHECK POINT

POINT (_ Voltage

POINT (_) Voltage

POINT © Voltage

POINT 1_ Voltage

POINT 1_) Voltage

POINT 1_ Voltage

NORMAL(-30 °C ~50 °C) IN SHORT IN OPEN

0.5 V-4.5 V OV 5V

- 37 -

EXPLATION FOR MICOM CIRCUIT

2) GR-B207ERA, GR-B247ERA

ICI

MICOM)

P66

(AIN6)

R36

CC17_ 2K

<_f:. RD1

61 R57 _ 26.1KF

*v,v%

CC19_ 2K

58 R4O

CC20 2K

59 R41

2_v\

CC21 2K

10€n_ 7

CON5

,_RR1 CON 6

261KF

_261KF

T RT1

63 R21 _ IOKF

CCl1_ _/K'_ - _ RT SENSOR

F SENSOR

D SENSOR

R1 SENSOR

R2 SENSOR

The above circuits are circuits attached to freezing room sensor or cold storage room sensor for adjusting setting

temperature at the freezing room and cold storage room, ice-making sensor for sensing water temperature in ice-making, or

an evaporator for sensing temperature of a frost removal sensor necessary for frost removal. Short or open status of every

temperature sensor is as follows:

SENSOR

Freezing sensor

Frost removal sensor

Cold storage sensor 1

Cold storage sensor 2

Room temperature sensor

CHECK POINT

POINT (_) Voltage

POINT (_ Voltage

POINT @ Voltage

POINT (_) Voltage

NORMAL(-30 °C ~50 °C) IN SHORT IN OPEN

0.5 V_4.5 V OV 5V

- 38 -

EXPLATION FOR MICOM CIRCUIT

1-6. Switch entry circuit

The following circuits are entry circuits for sensing signal form test S/VV,electronic single motor damper reed StW for

examining refrigerator.

1) GR-L207ERA, GR-L247ERA 2) GR-B207ERA, GR-B247ERA

IC1

MICOM

P15

_R2g

20 _ 47K o_ o SW1

cc13L _7

IC1

(MICOM}

P15 2O

1-7. Option designation circuit (model separation function)

1) GR-L207ERA, GR-L247ERA 2) GR-B207ERA, GR-B247ERA

R2S'_ Pll 161

47K 1 18

hi7 (MIOOM}

112R4 18 11 IC1

L(MIcoM)

The above circuits are used for designating separation by model as option and notifying it to MICOM. Designation of option

by model and the application standards are as follows:

• These circuits are accurately pre-adjusted in shipment from factory and so you must not additionally add or remove

option.

Separation Connection Status Application Standard

Connection Export model

OP1 OUT Domestic model

- 39 -

EXPLATION FOR MICOM CIRCUIT

1-8. Stepping motor operation circuit

HIOOH

P14

P15

P16

9,16

CE8 1,2

luF 68_

/5ov

3 4,_

IC10 CON9

TA777#P

14 10

11 11

12 13

STEPPING

MOTOR

For motor driving method, rotation magnetism is formed at coils wound on each phase of motor and stator and so motor

becomes to rotate if applying "High" signal to the IC8 (TA777AF) at the MICOM PIN 33 and outputting "High", "Low" signal

by step numbers fixed through MICOM PIN 34 and 35,.

Explanation) For driving method of the stepping motor, send signals in the cycle of 3.33 mSEC using terminal of MICOM

PIN 33, 34 and 35 as shown in wave form of the following part.

These signals are output to the output terminal (No.10, 11, 14, 15) via the input terminal (No. 3, 6, 8) of the

IC10 (TA7774F) as IC for motor driving. Output signals allow motor coils wound on each phase of stator to

form rotation magnetic field and the motor to rotate. Inputting as below figure to the input terminal (INA, INB)

as IC (TA7774AF) for motor driving allows motor coils wound on each phase of stator to form rotation

magnetic field and the stepping motor damper to rotate

CCW (Reverse rotation) 4_. (Positive rotation) CW

IIIIIIIIIII

INA ,

IIIIIIIIIII

/ ' ' I --L'

INB I

I I I I

,-_ ,,,, } ,

A I I

I I I I

o_1

I I I

I I

.._ I I

I I I

i i

I I I

IIII

I ,

IIII

' ' i

"T" I

I I

I I I

I I I I

i i

I I

-r r

I I I I

- 40 -

EXPLATION FOR MICOM CIRCUIT

1-9. Fan motor driving circuit (freezing room, M/C room)

1. This circuit performs function to make standby power '0' by cutting off power supplied to ICs inside of the fan motor in the

fan motor OFF.

2. This is a circuit to perform a temporary change of speed for the fan motor and applies DC voltage up to 7.5V - 16V to

motor.

3. This circuit performs function not to drive the fan motor further by cutting off power applied to the fan motor in the lock of

fan motor by sensing the operation RPM of the fan motor.

1) GR-L207ERA, GR-L247ERA

Motor OFF 5V

Motor ON 2 - 3V

(_) part (_) part (_), c_)part

2V or less 2V or less 0 V

12 - 14V 8- 16V OV

P54

C FAN PWM

P51

C FAN LOCK

P53

F FAN P_!M

PSO

F FAN LOCK

4,7K R35

R36 <<>

1OK _>

R41

R¢4

350 021

FR1D2

_42

R43

1OK

R#6

/,,/v,

15DuH

220uF CC19

/25V _223

\_ _#7K

CC20

6.2V

CON7

-41 -

EXPLATION FOR MICOM CIRCUIT

2) GR-B207ERA, GR-B247ERA

IC1

(MICOM)

P54

C FAN PV/M

P51

C FAN LOCK

P53

F FAN PWM

PSO

F FAN LOCK

4.7K

R55

1OK

zD2

1N¢735A

6.2V _r77

R31

330

R24

330

R29

2JK

R:2B

62O

1/2w

85 /Dll

& FRI02

K7C31 g8

R22

CON5

150uH: 7

I-

2_E7F * _CC16

/25v T225 8

\4.7K

CC15

77 02

22CDEuSF+ L2C2C14

/2sv T 11

%] cc_3 10

/_7 102

(

- 42 -

EXPLATION FOR MICOM CIRCUIT

1-10. Temperature compensation and over-cool/weak-cool compensation circuit

1. Temperature compensation at freezing room, cold storage room

1) GR-L207ERA, GR-L247ERA

IRR14 _R15

OK ]'IOK Temperature compens&tion &t R moore 55

CRTq _ Temperature compens_tlon at R room 57

_laK J

ICI

2) GR-B207ERA, GR-B247ERA

_-• R12 _[ R13

'Ft_OK i IOK Temperature compensation at Rroom 56

CRT] Temperature compens&tlon at R room 57

ICI

Freezing room Cold storage room

Resistance value Temperature Resistance value Temperature Remarks

(RCF1) compensation (RCR1) compensation

180 k_ +5 °C 180 k_ +2.5 °C Warmly

56 k_) +4 °C 56 k_ +2.0 °C compensate

33 k_) +3 °C 33 k_ +1.5 °C

18 k£_ +2 °C 18 k£_ +1.0 °C

12 k£_ +1 °C 12 k£_ +0.5 °C

10 k_ 0 °C 10 k_ 0 °C Referencetemperature

8.2 k_ -1 °C 8.2 k_ -0.5 °C

5.6 kD -2 °C 5.6 k_ -1.0 °C

3.3 k£_ -3 °C 3.3 k_ -1.5 °C '

2 k_) -4 °C 2 k_) -2.0 °C Coolly

470 _ -5 °C 470 £_ -2.5 °C compensate

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

Ex) If changing compensation resistance at a cold storage room (RCR1) from 10 kD (current resistance) to 18 k_

(modified resistance), temperature at the cold storage will increase by +1°C.

- 43 -

EXPLATION FOR MICOM CIRCUIT

• Temperature compensation table at the cold storage room is as follows:

Mod_icaton

470£_ 2kD 3.3kD 5.6kD 8.2k£_ 10k£_ 12kD 18kD 33kD 56kD 180kD

Cold storage

room

(RCR1)

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

470D change Up Up Up Up Up Up Up Up Up Up

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 kD Down change Up Up Up Up Up Up Up Up Up

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 k_) Down Down change Up Up Up Up Up Up Up Up

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 k_) Down Down Down change Up Up Up Up Up Up Up

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

8.2 k_) Down Down Down Drop change Up Up Up Up Up Up

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

10 kD Down Down Down Down Down change Up Up Up Up Up

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 kD Down Down Down Down Down Down change Up Up Up Up

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 kD Down Down Down Down Down Down Down change Up Up Up

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 kD Down Down Down Down Down Down Down Down change Up Up

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 kD Down Down Down Down Down Down Down Down Down change Up

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 kD Down Down Down Down Down Down Down Down Down Down change

• Temperature compensation at the freezing room is also performed in the same manner as cold storage room.

Temperature compensation value is equivalent to two times the cold storage room,

• This circuit is a circuit to enter the necessary level of temperature compensation for adjusting different temperature every

model at the cold storage room into MICOM.

- 44 -

EXPLATION FOR MICOM CIRCUIT

1-11. 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.

MICOM

(IC1) r_s7

P36

P35

Pao

P31

ea_

P33

ca4

F_ o_

i _ i A228M

A226M

CON6

RL1

IB0

RL2

IB0

R+

IBO

RZ7

_ICD(11 _zIOK

CON101

F2 F3

F4 F5

R3 R2 RI

R5 R4

'PWB ASS'Y,DISPLAY

F5 _ Max _ R5

F4 _ • _ R4

F3 _ _ R3

F2 _ _ R2

F1 _ Min _ R1

R S T

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

IC1

{MICOM)

P37

P36

P35

P30

Pal

P32

P33

P22 2a ±CClO

_1o2

RLI

18O

eL2

180

CONe CON101

FI F2 F3

F4 F5

R3 R2

sm_

T_ T_r_

o. _o o_o

PWB ASS'Y,DISPLAY

-45 -

EXPLATION FOR MICOM CIRCUIT

2. Compensation circuit for weak-cold, over-cold at f?eezing room

1) GR-L207ERA, GR-L247ERA 2) GR-B207ERA, GR-B247ERA

R15

1OK •

RIB]

1OK

R17

10K <

IC1

JCR1

JCR2

JCR3

JCR4

Temperature compensation in CUT

+1 °C +2 °C

+1 °C

-1 °C -2 °C

-1 °C

Compensation

for weak-cold

JCR3

CUT

JCR4

CUT

Compensation

for over-cold

JCR1 JCR2

CUT

CUT CUT

CUT

CUT (_

(_ CUT

CUT (_

CUT CUT

Temperature compensation value

at cold storage room

0 °C (In shipment from factory)

-1 °C

+1 °C

-2 °C

+2 °C

0°C

-1 °C

+1 °C

0°C

Remarks

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

- 46 -

EXPLATION FOR MICOM CIRCUIT

3. PWB parts diagram and list

3-1. PWB Ass'y, main part diagram

1. GR-L207ERA, GR-L247ERA

il.r_ J

- 47 -

EXPLATION FOR MICOM CIRCUIT

3-2. Parts list

1. GR-L207ERA, GR-L247ERA

NO DWG NO. 3ESCRIP]qO_ SpEU' MAKER REUARK

1 iB70JBSfll_ PWB,MAIN FR I(DS 11Q7A', 300 £AN L=16

i170JB201_ 1,2:1 7_mE

2]RA_9_S_{£L) SAM[L TRANS

3 i630JBB001/ J[202I[62(_P21 CON4

4 _630JB8001[ JE2D2 1_1 CON2

T _630JB8001[ dE202 1T 04 JAE EUN CON1

_3uJa_Om; _t_IT_[9_4__ CON5

9 _630JB8001[ J_211 ,'K_-_,_,BI CON3

WAFER

10 BBSOJBBO07C 917786 I(BP) CON6

11 5530JBBOIG_ 9177_1 103P) CONB

12 8030,8a007, 91/768-1(10P} CONg

13 BB30JBBOa7L 917790 102P) AMP C 0N7

1 5 )IZZJB2009'_ MICOM CHI TMp87cB41 k TOSHIBA CI(=glZZJBTOOBB}

KIA7BOOSAF K.E.C IC5

15 DIKE7BO5OOZREGULATOI

KIA7042AP <.E.C

17 OIKETO4200ARESET IC9

}IKEBSOD30( KIDBSOO3AF KEC

10 DRIVE IC IC6,7

_OSHIB

_ iCl 0

)1T0777400t TA7774AF

19 DRIVE IC

20 )1RH6222001 DRIVE IC BA6222 ROHM ICll

21 )1SK65510{]I DRIVE IC STR G655 SANKEN IC2

22 }1KE¢3100{]1 /REGULATOFKlAn5 _ <.E.C IC4

IC3

23 )1T0721000t PHOTO q_ TLP721 F TOSHIBA

IC8

24 _920,820071 VSB 1210 TAKAWI_AfiARYI,3

i920,1t20051 JWlaFHN NAIS

25 RY2¢

_920_200€i DH12DI 0 ( JAEIL _Y11(R LAMP]

26 _920,B2005/ JWlaFHN NAIS

_Yll LXHU_I

_920JB2003[ ALD112 NAIS 220~240v

27 _g20_20091 RELAY GSS 1A OMRON RYI¢

(H/BAR Hm)

28 i920JB20031 ALD112 NAIS RY5,6,710,12,13

29_920JB2003E ALDllZ NAIS RY8

rPiim V_IYF)

i212JBBOOIE CSTS4.0OMGO3 OSCl

_ RESONATOI _URATA

J570 O0012E CST¢OOMG_TF_ (=6212_090@28)

_I02JBBOOIE INR1 _062" •JIN

VARISTOF VAI

INRI#D27" • dIN

_5 ]572 00001[

3_) ]DR10200flAI FRI02 02,D22_25

_7 )DRIOTOOflAI FRI07 01

F_STRECO_L_ DELTA

_B )DR302000BI FR3D2 D3,4

_9 )DD469709A( REC_R5_gl@ IN4007 020

D1B EXPORT)

]DD41480gB[ SIdfCHINGglOg IN4148 (22_2¢0v)

40 )DD40040gA( REC_R5_DI@ 1N4004 [1)DELTA

:_)p"UNC

)DD40040gA( REC_R5_DI@ IN4004 CHANC

41 )D0400409A( REC_R5_DI@ IN4004 _67&_

42 ODB_60_OOA_BRIDC_DIOO D3SBA60 ;HINDEN_IBD1

(1)ROHM

4_ ]DD414_09B[ SId[CHINGDIOD1N4140 (_) m'uN_

CHANt

(H/BAR HTR)

4,$ 30ZWROOO1glZENERDIOD 1N4735(6 2V DELTA ZD1,2

)CE2271FB31

)_EIO71H&_

3CE1061K63_

)_E687AH69[

)CE22B7H69[

]CE107AH61[

)_E227AHB3f

Q_E476B_6_O

)CQ¢732Y43[

)C@241N63[

)CK2210_51[

)CK¢71DK961

)CKIO@K@BI

)CKIO2BK_BI

)CK2A3DKgBI

)0F35€3067[

)CF22_0067[

)RS5602K60(

)RS1503J601

ORSOIOIJBO_

]RDO652H60[

)RD6200H60!

)RD5603H60!

)RD3500860!

)RD6BOOB60!

)RDIBOlGBOi

)RD2001G60!

3RB3901G60!

)_04701666!

]RDIOO2G60!

)RD1002G60[

]RD1002G60!

)RN1002G_43!

)_N16226401

)_N2612G_

)RDO532E@7;

]RD1001E67;

]RD1OOOE67;

]RD2001E67;

)RD4701E67;

)RD1gO2E67_

)RD190_67;

]RN24aIE47;

)RNgIOIE¢7;

3ESCRIP_O_ SPEC,

220uF/16V

E¢_'("K _ 100uF/25V

1uF/50V

E¢&!p_,(_i_ _ 680uF/25V

2200uF/25V

lOOuF/50V

E¢I_G I_ 220uF/25V

d_I_ €7uF/450V

MyL'CAp_TO 473/5_0V

22€/10QV

CSR'CAP_TO 221 /2KV

471/50V

CSR'gAP_aTO 104/50V

(_B 28127rPE 102/50V

223/50V

33DnF/275VAC

FILMCAPAClTO

220nF/275VAC

56K /2W

150K /lW

R,OXIDEFlU

1/1W

68J 1/2W

620J 1/2W

560K 1/2W

350 1/#W

680 1/4W

18K 1/4W

R,CARBONRU

2K 1/4W

3.9K 1/4W

#7K 1/#W

1OK 1/4W

1OK 1/#W

1QKF 1/4W

R,METALRLI 16 2KF 1/4W

261KF 1/4W

33 1/8W

1K 1/8W

100 1/8W

2K 1/BW

CHIPRESISTO4.7K 1/8W

(9_D2011hE 1OK 1/8W

1M 1/8W

2.4KF 1/8W

91KF 1/BW

MAKER REMARK

2E5

{UBYCON CE9

CE8

3E3

_AM HWA 3E4

3E2

_UBYCON 3E6,7

_AM HWA 3E1

3M3

SEIL

CC4

CC2

CC1

SA_ HWA CC5_16,21_31

CCIB,2D

CC17,19

CM1

PILKOR

CM2

R3,9

ROCP

R65

R39€6

R38€5

(1)SF_ART

(2)C_y_ R27

R54,40,€7,50

R58,62

R36#3

R¢,13,25,28,30

R¢1,48,60,63,6€

Rl1,15,37,4€,5€

RCF1

RCR1

RT1

RF1,RIMI

RDI,RRI,2

RIO

R29,_1_33,_9,51

R5256 5759 61

ROHM R22_24,55,€2

R14_21,53,55

R12

RF3

RF2

- 49 -

EXPLATION FOR MICOM CIRCUIT

io BWG NO DESCRIPq]ON SpEC' MAKER REMARK

99 )_KE900041 KTA1705 Q2,4

IOC )TR31g_ogA: TRANSISTOR KTC_198 KEC q_,5

01 Iml0G009AF (RC1 O6rv Q1

i210JBBO011 _FS3510AC s_ HW_

02 &_(CIE),B[_S FBI

_600JBBO011 ;KHV1091E TACT

0_ TEST S/W SW1

_600JB80031 3 P, D I F OTAX

mP S/W SW2

0 6X7 5m_ J29_J34

4360701_ JUMP WIRE 0 6X10mm J01_10,12_2l

0 6X12 5m_ J35

JF1,JF2(FUSE1

4360701_ JUMP WIRE 06XlOmm

JCR1

JCR2

4360701_ JUMP WIRE 06XlOmm JCR3

JCR4

OP1

4360701_ JUMP WIRE 06XlOmm OP1 (EXPORT)

4360701_ JUMP WIRE 06XlOmm JHI(H/B HTR

i200JBSOB1E luF+120/350VA[PILKC

06 RC FILTER CR1

07 _g20JB3007J HEATSINK(STR) TAESUN_

_200JB3004E ;Vg70020 TNC

Og [2mH/7A) L1

110

CGMMDNCOIL

_200JBBOOSJ DV910320 TNC

I 11 (32mH/1 A) L2

112

113 3LRISOQK4JCCHOKE COIL I 50u H TNC L314

I 14 3J02447C F U S E 15A/250V

115 ig01JBSO011 FUSEHOLDER_C61 F SAM JL FUSE1

I 16 IFZZJB30011 F U S E 2AJ250V lit t l e FUSE2

117

118 DDOIO30F 250 TAB ;p881191 2 KET TAB1,2

I19 ISBFOSO241ESCREW ss'¥ TO H/SlN_ TAESUN_

12C €g11100 SOLDER _MIT KR lgRM_ HlSUNC

DAE JIN SOLD

121 _9111004 S_OELE_B8 t63A

122 5933310_ FLUX AUTO IS71 KOKI

- 50 -

EXPLATION FOR MICOM CIRCUIT

4. PWB circuit diagram - PWB circuit diagram may vary a little bit depending on actual condition.

1. GR-L207ERA, GR-L247ERA

cIN1E

PWB ASS'Y,MAIN

,/i

-53 -

EXPLATION FOR MICOM CIRCUIT

-54 -

ICEMAKERANDDISPENSEROPERATIONPRINCIPLEANDREPAIRMETHOD

1. Working Principles

1-1. Ice Maker Working Principles

• Level Ice Maker Cube Mould for "Initial Control"

after power is input.

• 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.

• Conduct "Ice Making Control" after supplying water into the ice maker

cube mould by operating water valve.

• 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.

1-2. Dispenser Working Principles

1. This function is available in Model GRIP247, 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.

- 57 -

ICEMAKERANDDISPENSEROPERATIONPRINCIPLEANDREPAIRMETHOD

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.

DIP SWITCH SETTING

S/W 1

OFF

S/W 2 S/W 3

OFF OFF

ON OFF

OFF ON

ON ON

WATER SUPPLY TIME

6.5 Sec.

5.5 Sec.

6 Sec.

7 Sec.

7.5 Sec.

8 Sec.

9 Sec.

10 Sec.

REMARKS

*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.

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.

- 58 -

ICEMAKERANDDISPENSEROPERATIONPRINCIPLEANDREPAIRMETHOD

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

'(_ ' ,

[ Bankis _ ', ' '

i' '

i i i

HALL IC ON ' '

OOT OT ICI

SIGNALS OFF

Bank is

HALL IC

OUTPUT

SIGNALS

[,0ECHECK,.G

i_ PV _1

ON ,

i i

ICECHECKINGLEVEL30°',

i i i i

.... i_ _1 ........... i ..... l_ _ _1

i i i i i

ii J J J

tii i i

-8" O" 10" 32" 41" 53' 58' 80"

Lock Ice making Ice Checking

(Onginal point)

2-+1 sec _"I

9±3 sec

8±3 sec

Maximum tilting

point

,,)i

I I

160' 170"

ice Ejection Lock

ICEMAKERANDDISPENSEROPERATIONPRINCIPLEANDREPAIRMETHOD

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: lce making _lceejection _Returningto

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.

- 60 -

ICEMAKERANDDISPENSEROPERATIONPRINCIPLEANDREPAIRMETHOD

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)

/ejection and level return

_f normal when test switch is

pressed for more than 0_ second? ./" r

Does the belI

Normal

Failed DC Power

• Check DC power (5V, 12V).

Failed ice making sensor

• Check the resistance of

both ends (1,2) of ice making

sensor of CON9.

• Defects between ice making

sensor and board

(Pin No. 60 of IC1)

Failed Ice Maker Unit

• Is the resistance of both ends

9,10 of ice ejection motor of

CON9 between 18 and 22£!?

• Is ice ejection motor drive circuit

(1C11 and peripheral circuits)

normal?

• Defects between Hall [C and

Board (Pin No. 42 of IC1).

• Confirm ice ejection and level

return when pressing

test switch.

Failed ice maker unit test switch

• Are both ends 5,6 of CON9

test switch open?

• Defects between test switch

and board (Pin No. 43 of IC1).

• Are both ends (3,4) of CON9

ice maker stop switch short?

Poor water supply

• Is power applied to water

supply valve?

• Does the water supply

valve work normally?

• Is the water supply line

normally connected?

_t Change main PWB I

Replace Ice making ISensor

Replace Ice Maker Unit I

Replace Main PWB I

Replace Ice maker Unit I

Replace water

supply valve I

-61 -

ICEMAKERANDDISPENSEROPERATIONPRINCIPLEANDREPAIRMETHOD

4. Ice maker circuit part

P40 41

P42

P41

IC1

P43

P44

R52

R55

0025

R57

44 47K (For wo_rd)

45 (RevePse)

ICll

BA5222

RIM1

1B2KF

<<4_R55

_47K

_2K

_223/100V

CON9

ICE MAKER SENSOR

_c_ ICE MAKER

STOP S/W

_I ICE MAKER

2 TEST S/W

ICE MAKER

MOTOR

The above ice maker circuit is applied to the R S65DQG/DSG, R-S65DRG and consists of the ice maker unit part installed

at the freezing room and the ice maker driving part of the main PWB.

Water supply to the ice maker container is done by opening the valve for the established water supply time by operating the

container via a solenoid relay for the ice valve of the solenoid valve placed at the M/C room. If the water supply time is

elapsed, water supply is automatically stop. This circuit is a circuit for implementing function such as ice removal, ice-full

detection, horizontal balancing and sense of ice-making temperature for the ice-maker container. Since ice-making

temperature sense is same as in the temperature sense circuit part of the main PWB, refer to it.

Test switch input detection of the ice-maker is same as in the door switch input detection circuit of the main PWB.

1. This function is used in operation test, service execution and cleaning etc and performed if pressing the test switch

installed at the automatic ice-maker itself for more than 0.5 second.

2. The test switch operates in the horizontal status and test function is not input in the water supply operation. Ice removal

control and water supply control is not performed if full-ice is arrived during the operation of test function.

3. If pressing the test switch for 0.5 second or more in the horizontal status, ice removal operation is immediately performed

irrespective of the generation conditions of ice at the ice-making tray. Therefore, care is required since water may

overflow if operating test function in the water state that ice-making is not done. A cycle of water supply is performed in

the horizontal balancing operation after ice removal operation. Therefore, you can check any problem of ice removal

operation, horizontal operation and water supply. In this case, if test function is normally performed, "Ding-" buzzer sound

rings and water supply control is performed. Thus, no ringing of "Ding-" buzzer sound means failure and repair check

must be performed.

4. If water supply is completed, operation in the normal cycle of "ice making * ice removal * returning to horizontal status

water supply".

- 62 -

CIRCUIT

CIRCUIT DIAGRAM

GR-P(L)207,247*RA(QA)(No,e2_

•HOMEBAR PART(H/BAR-HEATER,DOOR

CAPACITORPART,1HE PLUGTYPE,

COMPRESSOREARTHPART,

PILOTVALVEON CIRCUITDIAGRAMARE

SUBJECTTOCHANGE IN

DIFFERENTLOCALITESAND

ACCORDANCEWITH MODELTYPE.

•N:NEUTRAL F-FAN

C-FAN

MOTOR(BLDC)

PERCEPTION

DEFROST.SENSOR

F® ] _-SENSOR

HOMEBAR

DOORS/W

L_S° I

I_ENSOR

RI"SENSOR

R, PERCEPTION

HEA]ERSHEET

DAMPER E

ICE MAKER

MOTOR

ICE MAI_R

TEST S/W

ICE MAKER

STOPS/W

ICE MAKER

SENSOR

PWB ASSEMBLY,

DISPLAY

HEATERSHEET

CONlOl {DUCT-i_P.)_

GY g

PR 8

BL 7

BO 4

RD 3

BN 2

PWB ASSEMBLY,MAIN

FUSE PART

IP,_IO;N_447Q

GON7 _

_N4

CO _

SB _

GY = _"

CON3

)(N)

WH_)

CAPACITORPART

PK [RUNNINGRD/WH(I__

O.L.P COMP' __ !

COMPRESSOR P.T.C ASSY

EARTHPART

RD/WHIN,

DISP'HEAIERS/W HEATERPLA'_

(DI_P)

_ING

172_C1

HEK_R,CORD-L RD/WH(N

_(N)

DISP-LAMP

YL _ - •

o _,%N%

R-DOOR S/W

BO<__BO R-LAMP

_WAIE

_ _SOLENO,O,

_ _ _ CUBE

•FUSEPARTAPPLICATION(OPTIONAL)

FUSE

100-127V 220-240V

NO FUSE 2SOVAC 15A HEATER,PLATE(WfFANIg

BK(BLa_ClO:_I'IWARZ BN(BRO1M_:BRAUN BC(BRIQHT_ANQE_:PIB,.L_I_E QY(QRAYJ:QI:L_J _1_¢_

"tl_OW) ; GELB GN(G P,I_J_ : GRON PR(PIJRPL_ : PIJRFtJR WH(lh_FT_) : WEISS Mod_ Agplimi_on

3B(SKy BLUE) : HIMMEUBLALI pK(PINK_ : ROSA GN/YL(GREENHELLOW) ;GRON/GELB BL_.H ( BLUFJWHIT_ ; BLALIp,_EIS

WI'_BK_hl_I_c_BL_CK_: WEISS/ScI'_/ARz WH/F'I]ONHI_JRED):WEI88_ROT R_WH(RE_ITE_: ROTh'_EIS_ 3854JD1054C

DISPENSER

LEVERS/W

WH_

NH_

-63 -

CIRCUIT

DIAGRAMME DE CIRCUIT

GR-P(L)207,247*RA(QA)(No,e2

• PARTIEBARD'APPARTEMENT

BARD'APPARTEMENT:,PORTES/W),PARRE

CONDENSEUR,TYPEDERCHE, MISEALA GROUPEPWB PRINCIPAL

TERREDUCOMPRESSEUR,VANNESPILOTES

SURLESCHEMAELECTRIQUESONT

SUSCEPTIBLESDEMODIFICATIONSDANS

LESDIFFEREN_SREGIONSETSELONLETYPE

ETLEMODELE.MO'i_URDE

• N:NEU_E VENTILATEUR-F

MO'IEUR DE

VENTILATEUR-C

PORTE-F

CAPTEURDEDEGLA_AGEI

CAPTEUR-F

CONTACTPOLITEBAR

D'APP_MENT

CAP_UR-R1

PERCEPTION OUVERTURE

POR'_ BAR D'APPARTEMENT, R I

CHAUFFAGE, PLAQUE

(MODERA]EUR)

DE GLACE

ShV DETEST

FABRIQUEDEGLACE

ShV D'ARRET

FABRIQUEDE GLACE

CAPTEURFABRIQUE

DE GLACE

GROUPE PWB,

ECRAN

CHAUFFAGEPLAQUE

CON101 (CONDUIT_PORTE)

GY 9

PR 8

BL 7

BO 4

RD 3

BN 2

FUSIBLEP,_nE

(P,_IO;N_!47Q

CON7 _L(GN)

O.L.P

CON6 _N4

GY _

PR ....

CON3

RD _

BN .

COMP'

LAMPEDISTRIBUTEUR

YL __•

RD f_i VANNEPILO"_

o o,,_%"_-_R

CONTACT PORTE-R

BO_ _BO LAMPE- R

PR _ _ SOLENOIDE

_ _/_ SOLENOIDE

OUBE

CONTACT PORTE-F

PAR11ECONDENSEUR

IFONC_NNEMENT

PK :CONDENSEURRD/WH_)

•APPLICA1]ONFUSIBLEPARTIE(OPTION)

I_FUSIBLE 1

PASDE FUSIBLE 250VAC 15A CHAUFFAGE,PLAQUE(RESERVOIREAU)

BV,(BIACIO:SCI'IWARZ BN(BROWT_:BRAUN BG(BRIQHTOP,ANQE):HB..L43RANQEQY(QRAYJ:QP,NJ _P,_G_¢"_ A

"fl4"f_LOW):GELB GN(GP,I_J4):GRON PR(FIJRPt_:FIJRPUR WH0hl"II_):WEISS Mod_Applirai_n

,3B($KYBLUE): HIMMEUBLAU pIqPINiq: ROSA GNHL(GREENrfELLOW):GRO'N_ELB BL_H(BLUE,It_IT_) :BLAU_WEIS

WI'I,_,(Ohl"fl1_=,f_J_Q_:lh_ISS/_CI':Wi_ZWH/F,OONHI_ED):WEI88_ROT R_WH(REON_ITE_:ROTN_EIS_ US54JDI054C

RD/WHOql

S_/VNIVEAU

DISTRIBUTEUR

WH_

NH_

-64 -

TROUBLE DIAGNOSIS

1. TROUBLE SHOOTING

CAUSES AND CHECK POINTS. HOW TO CHECKCLAIMS.

1. Faulty start 1) No power on outlet.

2) No power on cord.

Bad connection between adapter and outlet. (faulty adapter)

The Inner diameter of adapter.

The distance between holes.

The distance between terminals.

The thickness of terminal.

Bad connection between plug

The distance between pins.

Pin outer diameter.

3) Shorted start circuit.

Nopoweron Disconnectedcopperwire.

powercord.

and adapter (faulty plug).

Internalelsotncalshort.

Faultyterminalcontact.

Powercordisdisconnected.

Faultysoldering.

Loosecontact,

Largedistancebetween

maleterminal,

- Thinfemaleterminal.

Terminaldisconnected,

Badsleeveassembly.

Disconnected. Weakconnection.

Shortinsertedcordlength.

Wornouttoolblade.

O.L.P isoff. CapacitydO.LP issmall.

CharacteristicsofO.L.Pisbad.

Badconnection.

Poweris InnerNi-Crwireblowsout.

disconnected. Badinternalconnect.

Faultyterminalcaulking(Cawireis cut).

Badsoldering.

Noelectricpoweron compressor.- Faultycompressor.

FaultyPTC. Powerdoesnot conduct.- Damage.

Badcharacteri_cs._Initialresistanceisbig.

Badconnectionwith _TooIcose.

compressor. LAssemblyisnotpossible.

Badterminalconnection.

4) During defrost. FStart automatic defrost,

LCycle was set at defrost when the refrigerator

was produced.

*Measuring instrument :

Multi tester

• Check the voltage.

If the voltage iswithin +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.LR

If power conducts : OK.

If not : NG.

• Check the resistance of both

terminals.

At normal temperature 6 :

OK.

If disconnected : oo.

- 65-

TROUBLE DIAGNOSIS

CLAIMS, CAUSES AND CHECK POINTS. HOW TO CHECK

2. No cooling. 2) Refrigeration system is clogged.

Moisture Residualmoisture Air Blowing. Notperformed.

dogged, intheevaporator. Tonshort.

impossiblemoisture

confirmation.

Lowairpressure.

Leaveitintheai_ _ Dufingresttime.

• Afterwork.

Capsaremissed.

Residualmoisture. Notdriedinthecompresse_

Elapsedmorethan6 monthsafterdt_ng

Capsaremissed.

Nopressurewhenitis_n.

Noelectric

power on

therm-

ontat.

Insuffidentdrier [ Drydrier- Drlertemperature.

capadty Leaveitinthe air. Checkon package

condition.

Goodstorageafter

finishing.

Residuaimoisture

inpipes. Capsaremissed. _Duringtransporta_.

• Duringwork.

Airblowing._ Not_fformed.

•Performed.

Tonshorttime.

Lowairpressure.

Lessdryair.

Moisturepenetra_ - Leaveitintheair.- Moisturepenetration.

intotherefrigerationoil.

Weldjoint

dogged.

Shortpipeinsert.

Pipegaps. FTonlarge,

LDamagedpipes.

Tonmuchsolder.

Drierdoggeing. Thecapillarytubeinserteddepth.- Tonmuch.

Capillarytubemelts.- Overheat.

Cloggedwithforeignmaterials. Desiccantpowder.

Weldoxides.

Drierangle.

Reducedcrosssectionbycutting.- Squeezed.

Compressorcap isdisconnected.

Foreignmaterialclogging. Foreignmaterialsare inthepipe.

• 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 isthe same

as before even heat is

applied.

- 66 -

TROUBLE DIAGNOSIS

CLAIMS.

3. Refrigeration

is weak.

CAUSES AND CHECK POINTS.

1) Refrigerant Partly leaked. • Weldjointleek.

Partsleak.

2) Poor defrosting capacity.

Drainpath (pipe)clogged. InjectP/Uintodrainhose. Injectthroughthe

hole.

Sealwithdrain.

Foreignmaterials P/Ulumpinput.

penetration. Screwinput.

Otherforeignmaterials

input.

Capdrainis notdisconnected.

Defrostheaterdoesnot Parts

generateheat. disconnected.

Plate

heater

Wireis cut.

- Heatingwire.

- Contactpoint

betweenheating

andelectricwire.

Dentbyfinevaporator,

Poorterminalcontacts.

Cord Wireis cut.

heater - Leadwire.

- Heatingwire.

- Contactpoint

betweenheatingand

electricwire.

Heatingwireiscorroded

-Waterpenetration.

Badterminalconnection.

HOW TO CHECK

• Check visually.

• Check terminal

Conduction: OK.

No conduction: NG.

If wire is not cut, refer to

resistance.

P=Power

V=Voltage

R=Resistance

R = --

- 67 -

TROUBLE DIAGNOSIS

CLAIMS.

3. Refrigeration

is weak.

CAUSES AND CHECK POINTS. HOW TO CHECK

Residual

frost. Weakhe_ from heate_ SheathHeater- rated.

Heaterplate- rated,

Heatercord-L- rated.

Badhe_er assembly. He_er plate F Nocontactto drain.

L Loosenedstoppercord.

He_er cord-L Notcontactto the

evaporatorpipe.

Locationof assembly

(topandmiddle).

Toosheddefrostingtime. DefrostSensor.

- Faultycharacteristics.

Seat-D(missing,location,thickness).

SthJcturalfault. Gasketgap.

Airinflowthroughthefanmotor.

Badinsulationof casedoor.

No automaticdefrosting.

Defrostdoes notretum.

3) Cooling air leak.

Bad gasketadhestion Gap.

Badattachment.

Contract.

Door sag. r Badadhesion.

Weakbindingforce_ hinge.

4) No cooling air circulation.

Faultyfan motor. Fanmotor. Selflocked.

Wireis cut.

Badterminalcontact.

Doorswitch. Faults. Contactdistance.

Buttonpressure.

Meltedcontact.

Contact.

Refrigeratorandfreezerswitchreversed.

Buttonisnot pressed. Poordoor

attachment.

Doorliner

(dimension).

Contractioninner

liner.

Misalignment

Badterminal

sennection.

P/Uliquidleak.

• Check the fan motor

conduction: OK.

No conduction: NG.

- 68 -

TROUBLE DIAGNOSIS

CLAIMS.

3. Refrigeration

is weak.

CAUSES AND CHECK POINTS. HOW TO CHECK

4) No cooling air circulation.

Faultyfan motor, Fanis F Fanshroudcontact.- Clearance.

constrained,_ Dampingevaporatorcontact.

L Accumul_edresidualfrost.

Smallcoolingair

discharge.

Insufficient Fanoverload.- Fanmisuse.

motorRPM BadlowtermperatureRPMcharacteristics.

Ratedpowermisuse.

Lowvoltage.

Faultyfan. Fanmisuse.

Badshape.

Looseconnection.- Nottightlyconnected.

insertdepth.

Shorud. Bent.

Iceandforeignm_edalsonrotatingparts.

5) Compressor capacity. Ratingmisuse.

Smallcapacity.

Lowvaltage.

6) Refrigerant

toomuch or toolittle. Malfunctionofchargingcylinder.

Wrongsettingdrefrigerant.

Insufficientcompressor.- Faultycempresse_

7) Continuous operation

- No contact of temperature controller. - Foreign materials.

8) Damper opens continuously.

Foreign materials P/Uliquiddump.

jammed. EPSwd(ersediment.

Screw.

Failed sensor, - Position of sensor,

Characteristics Bad characteristics of its own temperatue.

of damper. Parts misuse,

Charge of temperature - Impact.

characteristics.

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

• Check visually after

disassembly.

• Check visually after

disassembly.

- 69 -

TROUBLE DIAGNOSIS

CLAIMS. HOW TO CHECK

4. Warm

refrigerator

compartment

temperature.

5. No automatic

operation.

(faulty

contacts.)

6. Dew and

ice formation.

CAUSES AND CHECK POINTS,

1) Colgged cooling path.

• P/U liquidleak.

Foreignmatepals.-- P/Udumpliquid.

2) Food storate. Storehotfond.

Storetonmucha'conce.

Dooropen.

Packagesblockairflow.

1) Faulty temperature sensor in freezer or refrigerator compartment.

Faultycontact.

Faultytemperaturecharacteristics.

2) Refrigeration load is too much. Food. ,Tonmuchfond.

_Hot foed.

Frequentopeningandclosing.

Coolairleak.

Poordoordose.- Partlyopens.

3) Poor insulation.

4) Bad radiation. _ Highambiesttemparature.

L Spaceissecluded.

5) Refrigerant leak.

6) Inadequate of refrigerant.

7) Weak compressor discharging power. • Differentrating.

Smallcapacity.

8) Fan does not work.

9) Button is positioned at "strong."

1) Ice in freeezer compartment.

Extemalairinflow.-- Rubbermotorassemblydirection(reverse).

Door opens Weakdoordosingpowe£

but notcloses. Stoppermalfundion.

Doorsag.

Foodhindersdoordosing.

Gap aroundgasket.-- Contraction,distortion,loose,doortwisted,comer not

fullyinserted.

Food vapor. -- Storinghotfood.-- Unsealedfond.

2) Condensation in the refrigerator compartment.

Door opens Insufficientdosing.

but notcloses. Doorsag.

Foodhindersdoordosing.

Gasketgap.

3) Condensation on liner foam.

Conl airleak Notfullyfilleq., Tonptablepart.

and transmitted. Out plateR/Lpart.

Flangegap.-- Notsealed.

Gasketgap.

• Inspect parts measurements

and check visually.

- 70 -

TROUBLE DIAGNOSIS

CLAIMS.

6. Dew and

ice formation.

7. Sounds

CAUSES AND CHECK POINTS.

4) Dew on door.

Dew on the duct door. - Duct door heater is cut.

Dew on the dispense F RecessHeateriscut.

recess. L Ductdoorisopen./Foreignmaterialdogging.

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

L Cormer_ IJquidshort,e.

P/U liquid contraction. _ IJquidleak.

Dew on the Badwingadhesion. FWingsag(Iowerpart).

gasket surface. • Doorlinershapemism_ch.

Come£ FToo muchnotch.

• Broken.

HomeBarheateris cut.

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.E 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.

HOW TO CHECK

-71 -

TROUBLE DIAGNOSIS

CLAIMS. CAUSES AND CHECK POINTS. HOW TO CHECK

7. Sounds 1) Compressor compartment operating sounds.

Transformer sound. _lts ow_fault.-- Coregap.

Badconnection.-- Correctscrewconnect.

Drip tray vibration sound Badassembly.

Distortion.

Foreignmaterialsinside.

Back cover machine sound. T Badconnection.

Partlydamaged.

Condenser drain sound. _ Notconnected.

hBadpipecaulking.

2) Freezer compartment sounds.

Fan motor sound. • Normaloperatingsound.

L Vibrationsound._ Aged rubbersedc,

Badtorqueforassemblingmotor

bracket.

Sounds from fan Fanguidecontact.

contact. Shroudburrcontact.

Dampingevaporatorcontact.

Residualfrostcontact._ PoortreatmentCordheater.

LNarrowevaporatorinterval.

Unbalance fan sounds_ Unbalance. Surfacemachiningconditions.

Fandistortion,

Misshappen.

Burr.

Iceonthefan.-- Air intake(oppositeto motor

rubberassembly.)

Motor shaft _ Supporterdiso_ted.

contact sound_ _ TiIteddaringmotorassembly.

Resonance.

Evaporator noise. Evaporatorpipecontact.-- Nodampingevaporator

Soundfromrefrigerant.-- Stainlesssteelpipeshapein

accumulator.

Soundfromfin evaporatorandpipeduringexpansion

andcontraction.

3) Bowls and bottles make contact on top shelf.

4) Refrigerator roof contact.

5) Refrigerator side contact.

6) Insufficient Lubricants on door hinge.

- 72 -

TROUBLE DIAGNOSIS

CLAIMS. HOW TO CHECK

8. Faulty lamp

(freezer and

refrigerator

compartment).

9. Faulty internal

voltage(short).

1) Lamp problem.

2) Bad lamp assembly.

3) Bad lamp socket.

CAUSES AND CHECK POINTS.

,Filament blows out.

Glass is broken.

.Not inserted.

Loosened by vibration.

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. • Connect conduction and

Wire damage when assembling RT.C. Cover.

Outlet burr in the bottom plate.

Pressed by cord beaten 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.

non-conduction parts and

check with tester.

Conduction: NG.

Resistances: OK.

- 73 -

TROUBLE DIAGNOSIS

CLAIMS.

10. Structure,

appearance

and others.

CAUSES AND CHECK POINTS. HOW TO CHECK

1) Door foam.

Sag. Weaktorqueof Bo_is looseneddunng

hingeconnection, transporfaien.

Nottightlyfastened.

Screwwornout.

Weakgasket AdhesionsurPace.

adhesion.

Fixedtape. Netwelltixed.

Noise during Hingeinterference. Biggerdoorfoam.

operation. Hinge-Pintilted-Poorflatness.

Nowasher.

Nogreaseandnotenough

quantity.

Malfunction. _ NotdosedInterferencebetweendoorlinerand innerIine_

Refrfgerater Stopperwornout.

compartmentis

openedwhenfreezer

compartmentis

closed(faultystopper).

2) Odor.

Temperature of High.

refrigerator

compartment.

Deodorizer. _ Nodeedonzer.

Poorcapacity.

Bad_eezercompedmentdoor

assembly.

Nostopper.

Faultydampercontrol.

Buttonissetat"weak".

Doorisopen(interferenceby

food).

Food Storage. Sealcondition.

Storespecialodorousfood.

L Longtermstorage,

Others. Odorsfromchemicalprocacts.

- 74 -

"-4

2. Faults

2-1. Power

Problems Causes Checks Measures Remarks

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

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

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

and adapter.

Fuse blows out. - Short circuit by wrong connection.

Low voltage products are

connected to high voltage.

Short circuit by insects.

Electricity leakage.

High voltage.

Short circuit of components

(tracking due to moisture and dust

penetration).

- Check the fuse with tester

or visually.

- Check the input volt are with tester

(between power cord and products).

- Check the resistance of power cord

with testerf (if it is 0£_, it is shorted).

- Find and remove the cause of

problem(ex, short, high voltage,

low voltage).

- Replace with rated fuse.

- Replace with rated

fuse after confirming

its specification.

• If fuse blowns out

frequently, reconfirm

the cause and prevent.

2-2. Compressor

Problems Causes Checks Measures Remarks

- If resistance is infinite, replace it

with new one.

- If it is not infinite, it is normal.

- Check other parts.

- During forced operation:

- Operates: Check other parts.

- Not operate: Replace the frozen

compressor with new one, weld,

evacuate, and recharge refrigerant.

•Refer to weld repair procedures.

Compressor - Faulty PTC. - Check the resistance.

does not Vlaue:_ is defective.

operate.

Compressor is frozen. - If compressor assembly parts are

normal(capacitor, PTC, OLP),

apply power directly to the

compressor to force operation.

(_ Auxiliary winding _

pMo_iwLWinding _

OLP It starts as soon as it is

contacted.

"-4

2-3. Temperature

Problems

High

temperature

in the freezer

compartment.

Causes

Poor cool air circulation due to faulty

fan motor.

Faulty fan motor due to faulty door

switch operation.

Bad radiation conditions in

compressor compartment.

Checks Remarks

Lock -- Check resistance with a

tester.

0_): short.

oo_):cut.

- Rotate rotor manually and check

rotation.

- Wire is cut.

- Bad terminal contact: Check

terminal visually.

- Fan constraint. - Fan shroud

contact: Confirm

visually.

- Fan icing:

Confirm visually.

- Iced button (faulty) operation:

Press button to check

Faulty button pressure and contact:

Press button to check operation.

- Door cannot press door switch

button: Check visually.

Check the clearance between the

refrigerator and wall (50 mm in

minimum).

- Check dust on the grill in

compressor compartment.

- Check dust on the coils condenser.

Measures

Replace fan motor.

Reconnect and reinsert.

Maintain clearance and remove ice

(Repair and/or replace shroud if fan

is constrained by shroud

deformation).

- Confirm icing causes and repair.

Replace door switch.

- Door sag: fix door.

Door liner bent:replace door or

attach sheets.

Keep clearance between

refrigerator and walls (minimum

50mm).

Remove dust and contaminants

from grill for easy heat radiation.

Remove the dust with vacuum

cleaner from the coils condenser

while the refrigerator is off.

- The fan may be

broken if cleaning

performs while the

refrigerator is on.

-..q

2-4. Cooling

Problems

High

temperature

in the freezer

compartment.

Causes

Refrigerant leak.

Shortage of refrigerant.

Checks

Check sequence

1. Check the welded parts of the

drier inlet and outlet and drier

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 IFe + 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).

Check frost formation on the surface

of evaporator in the freezer

compartment.

- If the frost forms evenly on the

surface, it is OK.

If it does not, it is not good.

Measures

Weld the leaking part, recharge the

refrigerant.

Find out the leaking area, repair,

evacuate, and recharge the

refrigerant.

No leaking, remove the remaining

refrigerant, and recharge new

refrigerant.

Remarks

Drier must be replaced.

Ill

Problems Checks Measures

High

temperature in

the freezer

compartment.

Causes

Cycle pipe is clogged.

Leak at loop pipe weld joint

(discharge) in compressor.

Faulty cooling fan in the compressor

compartment.

Check sequence.

1. Check temperature of condenser

manually.

If it is warm, it is OK.

If it is not, compressor discharging

joints might be clogged.

2. Manually check whether hot line

pipe is warm.

If it is warm, it's OK.

If it is not, condenser outlet weld

joints might be colgged.

Check sequence.

1. Manually check whether

condenser is warm, It is not warm

and the frost forms partly on the

evaporator in the freezer

compartment.

Check sequence.

1. Check cooling fan operation.

2. Check that cooling fan is

disconnected from the motor.

- Heat up compressor discharging

weld joints with touch, disconnect

the pipes, and check the clogging.

Remove the causes of clogging,

weld, evacuate, and recharge

the refrigerant.

- If it's warm, it's OK. If it's not,

condenser discharging line weld

joints might be clogged.

Disconnect with torch, remove the

causes, evacuate, and recharge

seal refrigerant.

Replace the compressor, weld,

evacuate, and recharge refrigerant.

- Replace if motor does not operate.

- If fan is disconnected, check fan

damage and reassemble it.

• Refer to fan motor disassembly

and assembly sequence.

Remarks

Direr must be replaced.

Drier must be replaced.

rrl

-..q

¢O

2-5. Defrosting failure

Problems Causes

No defrosting. Heater does not generate heat as

the heating wire is cut or the circuit

is shorted.

1) Heating wire is damaged when

inserting into the evaporator.

2) Lead wire of heater is cut.

3) Heating wire at lead wire contacts

is cut.

Sucking duct and discharging hole

are clogged:

1. Impurities.

2. Ice.

Gap between Sucking duct and

Heater plate(Ice in the gap).

Wrong heater rating (or wrong

assembly).

Checks Measures Remarks

1. Check the resistance of heater.

0D: Short. o_): Cut.

Tens to thousands D: OK.

2. Check the resistance between

housing terminal and heater

surface.

0_: Short. o_: Cut.

Tens to thousands _: Short.

1. Confirm foreign materials. In case

of ice, insert the copper line

through the hole to check.

2. Put hot water into the drain

(check drains outside).

1. Confirm in the Sucking duct.

1. Check heater label.

2. Confirm the capacity after

substituting the resistance value

into the formula.

V2 (V: Ratedvoltage0f user country)

p=--

R (R: Resistanceof tester[D])

CompareP and lave1capacity.

Tolerance:+7%

Heating wire is short and wire is cut.

•Parts replacement: Refer to parts

explanations.

1) Push out impurities by inserting

copper wire.(Turn off more than

3hours and pour in hot water if

frost is severe.)

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.

1) Turn off the power, confirm

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.

Faults:replace.

-How to replace: Refer to main parts.

Seal the lead wire with

insulation tape and heat

contraction tube if the cut

lead wire is accessible to

repair.

Ill

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 0£_: OK. - Check wire color when maeasuring

2) Bad soldering. If _: 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

duct.

2) Icing by cool air inflow through

the gap of heater plate.

3) Icing by the gap of heater plate.

2) Raise the front side(door side),

support the front side legs, and let

the ice melt naturally. (If power is

on, melt the frost by forced

defrosting.)

Bad cool air inflow and discharge,

and bad defrosting due to faulty

contact and insertion (bad connector

insertion into housing of heater,

melting, fuse and motor fan).

2. Check by inserting soft copper

wire into the duct (soft and thin

copper not to impair heating wire).

1. Turn on power, open or close the

door, check that motor fan

operates (If it operates, motor fan

is OK).

2. Disconnect parts in the refrigerator

compartment, check the connection

around the housing visually,

defrost, and confirm heat generation

on the heater. Do not put hands on

the sheath heater.

3. Check the parts which have faults

described in 1, 2 (mechanical

model: disconnect thermostat

from the assembly).

3) Reassemble the heater plate.

1) Check the faulty connector of

housing and reassemble wrongly

assembled parts.

2) If the parts are very damaged,

remove the parts and replace it

with a new one.

rrl

2-6. Icing

Problems

Icing in the

refrigerator

compartment.

- Damper icing.

- Pipe icing.

- Discharging

pipe icing.

Causes Checks Measures Remarks

1) Bad circulation of cool air.

- Clogged intake port in the

refrigerator compartment.

- Sealing is not good.

- Toe much food is stored and clogs

the discharge port.

- Bad defrosting.

2) Faulty door or refrigerator

compartment.

- Faulty gasket.

- Faulty assembly.

3) Overcooling in the refrigerator

compartment.

- Faulty damper in the refrigerator

compartment.

- Faulty MICOM (faulty sensor)

4) Bad defrosting

- Heater wire is cut.

- Defective defrost sensor.

- Defresing cycle.

5) Customers are not familiar with

this machine.

Door opens.

High temperature, high moisture,

and high load.

Check the food is stored properly

(check discharge and intake port

are clogged).

Check icing on the surface of

baffle and cool air path (pipe) after

dissembling the container box.

Check icing at intake ports of

freezer and refrigerator

compartment.

Check gasket attached conditions.

Check door assembly conditions.

Check refrigerator compartment

is overcooled (when button

pressed on "weak").

- Check parts are faulty.

Check frost on the evaporator

after dissembling shroud and fan

grille.

Check ice on intake port of freezer

and refrigerator compartment.

Check food interferes with door

closing.

Check ice on the ceilings.

- Be acquainted with how to use.

- Sealing on connecting parts.

- Check the damper and replace

it if it has defects.

- Check defrost. (After forced

defrosting, check ice in the

evaporator and pipes.)

- Correct the gasket attachment

conditions and replace it.

- Door assembly and replacement.

- Replace faulty parts.

Check parts related to defrosting.

- Check defrosting, (Check ice on the

evaporator and pipe.)

Be acquainted with how to use.

Check the defrost

related parts if problem

is caused by faulty

defrosting.

Replacement should

be done when it

cannot be repaired.

- Moisture cannot frost

on the evaporator but

can be sucked into the

refrigerator, being

condensed and iced,

interferes with cool air

circulation, and

suppresses sublimation.

Ill

I:1

Problems Causes Checks Measures Remarks

Ice in the freezer

compartment.

- Surface of fan

grille.

- Wall of freezer

compartment.

- Cool air

discharging port

- Basket(rack)

area.

- Food surface.

- Icing in the

shute.

1) Bad cooling air circulation.

Intake port is colgged in the freezer

compartment.

- Discharging port is Clogged.

- Too much food is stored.

- Bad defrosting.

2) Bad freezer compartment door

-Faulty gasket

- Faulty assembly

- Check food storage conditions

visually.(Check clogging at intake

and discharging port of cooling air.)

- Check food occupation ratio in

volume(Less than 75%).

- Check frost on the evaporator after

dissembling shroud and fan grille.

- Check icing at intake port of

refrigerator compartment.

3) Over freezing in the freezer

compartment.

- Faulty MICOM.

4) Bad defrosting.

Heater wire is cut.

Faulty defrost sensor.

Defrosting cycle

5) User is not familiar with how to

use.

Door opens.

High moisture food(water) is stored.

- Check gasket attachment

conditions.

- Check door assembly conditions.

- Refrigerator operates pull down.

(Check if it is operated

intermittently)

- The Temperature of freezer

compartment is satisfactory, but

over freezing happens in the

refrigerator compartment even

though the notch is set at "weak".

- Check frost on the evaporator after

dissembling shroud and grille.

- Check ice on the intake port in the

refrigerator compartment.

- Check food holds door open.

- Check ice on the ice tray.

- Be acquainted with how to use.

- Check defrost (Check ice on the

evaporator and pipes after forced

defrosting).

- Correct the gasket attachement

conditions and replace it.

- Door assembly and replacement.

-Replace defective parts.

- Check parts related to defrosting.

- Check defrosting.(Check ice on the

evaporator and pipes after forced

defrosting.)

- Be acquainted with how to use.

- Check the parts related

to defrosting if the

problem is caused by

the faulty defrosting.

- Replace when it can not

be repaired.

rrl

2-7. Sound

Problems

"Whizz" sound

Causes

1. Loud sound of compressor

operation.

2. Pipes resonat sound which is

connected to the compressor.

3. Fan operation sound in the freezer

compartment.

4. Fan operation sound in the

compressor compartment.

Checks Measures Remarks

1.1 Check the level of the

refrigerator.

1.2 Check the rubber seat

conditions (sagging and aging).

2.1 Check the level of pipes

connected to the compressor

and their interference.

2.2 Check rubber inserting

conditions in pipes.

2.3 Touch pipes with hands or screw

-driver (check the change of

sound).

3.1 Check fan insertion depth and

blade damage.

3.2 Check the interference with

structures.

3.3 Check fan motor.

3.4 Check fan motor rubber insertion

and aging conditions.

4.1 Same as fan confirmation in the

refrigerator.

4.2 Check drip tray leg insertion.

4.3 Check the screw fastening

conditions at condenser and

drip tray.

1) Maintain horizontal level.

2) Replace rubber and seat if they

are sagged and aged.

3) Insert rubber where hand contact

reduces noise in the pipe.

4) Avoid pipe interference.

5) Replace defective fan and fan

motor.

6) Adjust fan to be in the center of

bell mouth of the fan guide.

7) Leve a clearance between

interfering parts and seal gaps in

the structures.

8) Reassemble the parts which make

sound.

9) Leave a clearance if evaporator

pipes and suction pipe touch

freezer shroud.

rrl

Problems

Vibration sound.

("Cluck")

Irregular sound.

("Click").

Causes Checks Measures Remarks

1-1. Remove and replace the

shelves in the refrigerator

1-2. Check light food and container

on the shelves.

2-1. Touch pipes in the compressere

compartment with hands.

2-2 Check capillary tube touches

cover back.

3-1 Check compressor stopper

vibration.

4-1 Check vibration of front and rear

moving wheels,

5-1 Touch other structures and parts.

1. Vibration of shelves and foods in

the refrigerator.

2. Pipes interference and capillary

tube touching in the compressor.

compartment.

3. Compressor stopper vibration.

4. Moving wheel vibration.

5. Other structure and parts

vibration.

1. It is caused by heat expansion

and contraction of evaporator,

shelves, and pipes in the

refrigerator.

1-1 Check time and place of sound

sources.

1) Reassemble the vibrating parts

and insert foam or cushion where

vibration is severe.

2) Leave a clearance where parts

interfere with each other.

3) Reduce vibration with rubber

and restrainer if it is severe.

(especially, compressor and pipe).

4) Replace compressor stopper if it

vibtates severely.

1) Explain the principles of refrigeration

and that the temperature difference

between operation and defrosting

can make sounds.

2) If evaporator pipe contacts with other

structures, leave a clearance between

them (freezer shroud or inner case),

Ill

Problems Checks Measures Remarks

Sound "Burping"

(almostthe same

as animals crying

sound).

Water boiling or

flowing sound.

Sound of whistle

when door

closes.

Causes

It happens when refrigerant expands

at the end of capillary tube.

It happens when refrigerant passes

orifice inaccumulator internal pipes by

the pressure difference between

condenser and evaporator.

When door closes, the internal pressure

of the refrigerator decreases sharply

below atomosphere and sucks air into

lhe refrigerator, makingthe whistle

sound.

- Check the sound of refrigerant at the

initial installation.

- Check the sound when the refrigerator

starts operation after forced defrosting.

- Check the restrainer attachment

conditions on the evaporator and

capillary tube weld joints.

- Checkthe sound when compressoris

turned on.

- Checkthe sound when compressoris

turned off.

- Check the sound by opening and

closing the refrigerator or freezer doors.

- Check the restrainer attached on the

evaporator and capillary tube weld

joints and attach another restrainer.

- If it is continuous and servere, insert

capillary tube again (depth:15+3mm)

- Fasten the capillary tube to suction

pipes or detach in the compressor

compartment.

- Explain the principles of freezing

cycles.

- Explain the principles of freezing cycles

and refrigerant flowing phenomenon by

internal pressure difference.

- If sound is servere, wrap the

accumulator with foam and restrainer.

- Broaden the cap of discharge hose for

defrosting in the compressor

compartment.

- Seal the gap with sealant between out

and inner cases of hinge in door.

rrl

2-8. Odor

Problems

Food Odor.

Plastic Odor.

Odor from the

deodorizer.

Causes

Food (garlic, kimchi, etc)

Odors of mixed food and plastic

odors.

Odor from the old deodorizer.

Checks Measures Remarks

Check the food is not wrapped.

Check the shelves or inner

wall are stained with food juice.

Check the food in the vinyl wraps.

- Chedk food cleanliness.

Check wet food is wrapped with

plastic bowl and bag.

It happens in the new refrigerator.

- Check the deodorizer odors.

Dry deodorizer in the shiny and

windy place.

Store the food in the closed

container instead of vinyl wraps.

Clean the refrigerator and set

button at "strong".

Clean the refrigerator.

Persuade customers not to use

plastic bag or wraps with wet food

or odorous foods.

- Dry the deodorizer with dryer and

then in the shiny and windy place.

- Remove and replace the

deodorants.

*Deodorizer : option

rrl

*-4

2-9. Micom

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.

Abnormal

display LED

operation

PCB Trans winding is

cut.

PCB Trans temperature

fuse is burnt out.

Check resistance of PCB Trans

input and output terminals with

a tester. (If resistance is infinity,

trans winding is cut).

Replace PCB Trans

or PCB.

Applicable to

model without

dispenser.

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.

Lead Wire connecting

main PCB and display

PCB is cut or connector

terminal connection is

bad.

Bad connection

between Main PCB

and display circuit.

Check Lead Wire terminals

connecting Main PCB and

display PCB with a tester.

Check if all LEDs are on when

Main PCB Test switch is

pressed (or when both freezer

key and power freezer key are

pressed at the same time for

more than one second.)

Defective LED

module.

Reconnect Lead

Wire and directly

connect defective

contact terminal to

Lead Wire.

Replace display

PCB.

Defective LED. Refer to display

circuit in circuit

explanation.

Ill

Problems

Bad cooling,

Symptom

Freezer

temperature is

high.

Compressor does

not start.

Defective freezer

sensor.

Causes Checks Measures Remarks

Compressor Lead Wire

is cut.

Defective compressor

driving relay.

Defective Freezer

sensor parts.

Check compressor Lead Wire

with a tester.

Measure voltage at PCB CON5

(3&9) after pressing main PCB

test switch once. It is OK if

voltage is normal.

Check resistance of freezer

sensor with a tester.

Reconnect Lead

Wire.

Replace relay(RY1

and RY14) or PCB.

Replace freezer

sensor.

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

substituted for other circuits (main PCB sensor sensor housing

sensor, housing).

Defective freezer fan

motor.

Check fan motor lead wire

with a tester.

Measure the voltage between

PCB power blue line and fan

motor after pressing test switch

of Main PCB. If the voltage is

normal, it is OK.

Faulty defrost.

Fan motor lead wire

is cut.

• Defective door switch

(freezer, refrigerator,

home bar).

• Defective fan motor.

• Defective fan motor

driving relay.

Reconnect lead

wire.

• Replace door

switch (freezer,

refrigerator and

home bar).

• Replace fan motor.

• Replace relay(RY5

& RY6) or PCB.

Refer to faulty defrost items in trouble diagnosis

functions.

Refer to load

driving circuit in

circuit

explanation.

Refer to

resistance

characteristics

table of sensor in

circuit

explanation.

Refer to load

driving circuits in

circuit

explanation.

Refer to trouble

diagnosis

function.

Ill

¢O

Problems

Bad cooling

Symptom Checks Remarks

Wrong

Refrigerator

temperature.

Causes

Defective AC Damper.

Defective refrigerator

sensor

Check AC damper

motor and reed switch

and lead wire are cut.

Check AC damper

3art.

Check if AC damper motor and

reed switch lead wire are

cut with a tester.

Refer to AC damper in parts

repair guide.

Measures

Reconnect lead

wire.

Replace AC damper

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

damper baffles visually.

Ice formation on AC Check if AC damper Heater

damper baffles wire is cut with a tester.

Defective refrigerator

sensor parts.

Check the resistance of

refrigerator sensor with a tester.

Check the sensor color in the

circuit. (main PCB sensor

housing.)

Check if refrigerator sensor

is not fixed at cover sensor but

inner case visually.

Refrigerator sensor is

substituted for other

sensor.

Defective refrigerator

sensor assembly

condition.

Remove foreign

materials.

Replace AC damper

or refrigerator control

Box Assy.

Replace refrigerator

sensor,

Repair main PCB

sensor housing.

Fix again the

refrigerator sensor.

Refer to sensor

resistance

characteristic

table in circuit

explanation.

rrl

¢O

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

with a tester.

Defective

display button

Replace defrost

sensor.

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.

Check input wire with a tester.Key input wire is cut or bad connector

terminal contact in main PCB and

display PCB connecting lead wire.

Buzzer does

notring and

key does not

sense even

bu_onis

pressed.

Disassemble frame display and confirm

visually.

Key is continuously depressed due to

structural interference.

Reconnect lead

wire and replace or

directly connect bad

contact terminal to

lead wire.

Adjust or replace

interfering

structures.

Refer to sensor

resistance

characteristic

table of circuit

explanation.

Refer to display

circuit in circuit

explanation.

rrl

¢O

Problems

Defective

display button.

Door Buzzer

Symptom Remarks

Buzzer rings

but key does

not sense even

button is

pressed.

Buzzer

continuously

rings or door

opening alarm

does not work.

Causes

Trouble mode indication.

Defective connecting lead wire from

main PCB to door switch.

Defective freezer compartment door

switch parts.

Checks

Check trouble diagnosis function.

Check lead wire associated with door

switch.

Refer to door switch in parts repair

guide.

Measures

Repair troubles

Repair lead wire.

Replace Freezer

compartment door

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.

Refer to mode

indication in

function

explanations.

Check model

with dispenser.

rrl

TROUBLE DIAGNOSIS

3. Cooling Cycle Heavy Repair

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

NO. Items Unit Standards Purposes Remarks

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

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

10minutes. 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

(N2 pressure: during welding.

0.1-0.2 kg/cm 2) - Do not apply force to pipes before and

after welding to protect pipe from

cracking.

3 N2 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 N2 gas for more than 1 rain

cap. use the parts.

Sound:usable

No sound:not usable

4 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.

6 Drier replacement.

Leak check.7

EA Use R134a

exclusively.

Weighing

allowance:+5g

Note:Wintera5g

Summer:+5g

-UseR134aexclusively

for R134arefrigerator

-Use R12 exclusively

for R12 refrigerator

-Replacedrierwhenever

repairing refrigerator

cycle piping.

-Do not use soapy

water for check.

it may be sucked

into the pipe by.

Do not mix

with R12

refrigerant.

To remove

the moisture

from pipe.

Detect

refrigerant

leak area.

- Do not weight the refrigerant at too hot or

too cold an area.(25°C is adequate.)

- Use copper bombe

Socket:2SV Plug: 2PV R134a

Note:Do not burn O-ring (rubber) during

welding.

-Check oil leak at refrigerant leak area.

Use electronic leak detector if oil leak is

not found.

-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.

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

- 92 -

TROUBLE DIAGNOSIS

3-2. Summary Of Heavy Repair

Process Contents Tools

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

drier and compressor.

Pipe Cutter, Gas welder, N2 gas

I111_1 Y

- Use R134a oil and refrigerant for compressor and drier

- Confirm N2sealing and packing conditions before use.

Use good one for welding and assembly.

- Weld under nitrogen gas atmosphere.(N2 gas pressure:

0.1-0.2kg/cm2).

- Repair in aclean and dry place.

- Evacuate for more than forty minutes after connecting

manifold gauge hose and vacuum pump to high (drier)

and low (compressor refrigerant discharging parts)

pressure sides.

- Evacuation Speed:113l/min.

- Weigh and control the allowance of R134a bombe in a

vacuum conditions to be +5 g with electronic scales and

charge through compressor inlet

(Charge while refrigerator operates).

- Weld carefully after inlet pinching.

- Check leak at weld joints.

_ Minute leak: Use electronic leak detector

Big leak: Check visually or fingers.

Note:Do not use soapy water for check.

- Check cooling capacity

0_Check radiator manually to see if warm.

_ Check hot line pipe manually to see if warm.

@Check frost formation on the whole surface of the

evaporator.

- Remove flux from the silver weld joints with soft brush

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.)

Vacuum pump(R134a

exclusively), Manifold gauge.

R134a exclusive bombe(mass

cylinder), refrigerant(R134a)

manifold gauge, electronic

scales, punching off flier,

gas welding machine

Electronic Leak Detector,

Driver(Ruler).

Copper brush, Rag, Tool box

- 93 -

TROUBLE DIAGNOSIS

3-3. Precautions During Heavy Repair

Precautions

1) Use special parts and tools for R134a.

Items

1. Use of tools.

2. Removal of retained

refrigerant.

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

(If not, oil will leak inside.)

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

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

Evaporator

_side

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

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

welding. (Nitrogen pressure : 0.1-0.2 kglcm2.)

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.

- 94 -

TROUBLE DIAGNOSIS

3-4. Practical Work For Heavy Repair

PrecautionsItems

1. Removal of residual

refrigerant.

2. Nitrogen blowing

welding.

3. Replacement of drier.

Evaporator

Compressor _/w pressure side

/_ Drier

j_ _ tHigh pressure side

R_enser --_ _ ......

Intake

KEYPOINTING

Observe the sequence for

removal of refrigerant.

(If not, compressor oil may

leak.)

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.

Evaporator

R_ side

Intake

KEYPOINTING

Welding without nitrogen

blowing produces oxidized

scales inside apipe, which

affect on performance and

reliability of a product.

When replacing a drier:

Weld (T) and (_) parts by blowing nitrogen(0.1-0.2kg/cm 2) to high pressure side after

assembling adrier.

When replacing a compressor:

Weld (_) and @ parts by blowing nitrogen to the low pressure side.

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

scales inside pipe because of its short welding time.

Filter

*Unit : mm KEYPOINTING

Be sure to check the

i inserted length of capillary

tube when it is inserted. (If

too much inserted, a

capillary tube is clogged by

a filter.)

Inserting a capillary tube

Measure distance with a ruler and put a mark(12+3/0)on the capillary tube. Insert tube to the

mark, and weld it

- 95-

TROUBLE DIAGNOSIS

Items

4.Vacuum degassing.

5.Refrigerant charging.

Precautions

Evaporator

Suction pipe

Compressor

Dner

VaCCl

Blue

Low

pressure High

pressure

Red

Pipe Connection

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

low pressure side.

Vacuum Sequence

Open (T), (_) valves and evacuate for 40 minutes. Close valve (T).

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.)

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.

E_ Indicate the weight of

an evacuated bombe

R134a _)_

KEYPOINTING

Be sure to charge

the refrigerant at

around 25°C.

Be sure to keep -5g

in the winer and

+5g in summer

I Calculation of amount of refrigerant charged ]

the amount of refrigerant charged= a weight after charging

a weight before charging (a weight of an evacuated cylinder)

- 96 -

TROUBLE DIAGNOSIS

Items Precautions

6. Gasqeakage test

7. Pipe arrangement

in each cycle

Evaporator

Compressor

Condenser

Bombe

4) Refrigerant Charging

Charge refrigerant while operating a compressor as shown above.

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

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

on the welded parts.

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

Check each pipe is placed in its original _ :

, place before closing a cover back-M/C _ ['1_

after completion of work. Particularly • _ LI _i

control the size of Joint Drain Pipe _ I _ _._i ubber

3-5. Standard Regulations For Heavy Repair

1) Observe the safety precautions for gas handling.

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

break and accident.)

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

case parts.

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

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

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

Drier

SievesM°lecular',,,,,,_,_// I _ Molecular_ Pipe

_ r

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.)

- 97 -

TROUBLE DIAGNOSIS

3-6. Brazing Reference Drawings

PIPE ASSY, HOT LINE

(Freezer)

Copper Brazer Copper

CAPI - TUBE DRIER ASSY

PIPE ASSY, SUCTION

Copper

Brazer

PIPE ASSY, HOT LINE

(Refrigerator)

Copper

Brazer

Copper Brazer Copper Brazer

JOINT\CONDENSER ASSY,WIRE

"- Silver Brazer

Coppper Brazer

- 98 -

TROUBLE DIAGNOSIS

4. HOW TO DEAL WITH CLAIMS

4-1. Sound

Problems Checks and Measures

"Whizz" sounds

"Click"sounds

"Clunk"sound

Vibration sound

•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.

• 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.

• 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.

•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 aloud

sound. Please adjust the level of the refrigerator.

- 99 -

TROUBLE DIAGNOSIS

Problems Checks and Measures

Sounds of water flowing

"Click"sounds

Noise of ice maker operation

(applicable to model with ice maker

- Noise produced by ice dropping

and hitting ice bank.

- Noise from motor sounds "Whizz".

Noise when supplying water.

Noise when supplying ice.

• 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.

•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.

•Explain the procedure and principles of ice maker operation.

• Automatic ice maker repeats the cycle of water supplying _ icemaking _ ice

ejection. When water is supplied, the water supply valve in the machine room

makes sounds like "Whizz" and water flowing also makes sound. When water

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.

•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.

• 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.

- 100 -

TROUBLE DIAGNOSIS

4-2. Measures for Symptoms on Temperature

Checks and MeasuresProblems

Refrigeration is weak.

The food in the chilled drawer is.

not frozen but defrosted

Refrigerator water is not cool.

Ice cream softens.

Refrigeration is too strong.

Vegetables are frozen.

The food stored at inside of

the shelf freezes even the

control button is set at "MID".

•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 chilled drawer does not freeze food.

• Use chilled drawer for storing fresh meat or fish for short periods. For storing for

along periods or freezing food, use a freezer compartment. It is normal that

frozen foods thaw above the freezing temperature (in the chilled drawer).

•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.

• 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 acold place or set the temperature control button of a freezer

at "strong" position.

•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.

• 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.

• Check if food is stored near the outlet of the cooling air.

• The temperature at cooling air outlet is always below the freezing point.

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.

- 101 -

TROUBLE DIAGNOSIS

4-3. Odor and Frost

Checks and MeasuresProblems

Odor in the refrigerator compartment.

Frost in the freezer compartment

Frost in ice tray.

• 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".

• 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.

• 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.

- 102 -

TROUBLE DIAGNOSIS

4-5. Others

Problems Checks and Measures

The refrigerator case is hot.

Small holes in a door liner

Electric bills are too much.

Condensation on the inside

wall of the refrigerator

compartment and the cover of

properly vegetable drawen

When is the power connected?

Door does not open properly.

• 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:

• 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.

• 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.

• Explain how to store foods

• Condensation forms when refrigerator is installed at damp area, door is

frequently opened, and wet foods are not stored in the air tight container or

wrapped. Be sure to store wet foods in the air tight container or in the wrap.

• 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.

• 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.

- 103 -

HOW TO DISASSEMBLE AND ASSEMBLE

1. DOOR

1) Remove lower cover and then disconnect water

supply tube in the lower part of freezer door.

•Pull a water supply tube @ forward while pressing (_)part

to disconnect water supply tube as shown below.

(3) Disconnect upper hinge 0 from a hinge supporter @

by grasping the front part of upper hinge and lifting up

(Hinge Assy, U) in arrow direction _) and pull forward

in arrow _) direction. Be careful as the door may be

fallen down.

2) Remove a freezer door.

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

cover.

Disconnect all connecting lines except earthing cord.

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

disconnect the door from the lower hinge Q. Don't pull

a door forward.

_Cover, Hinge

Earthing

Cord

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

loosened and take it out in arrow (_ direction.

Lever, Hinge

Connecting

_ Line

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

fully taken out.

(5) Assembly is the reverse order of disassembly

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.

- 104 -

HOW TO DISASSEMBLE AND ASSEMBLE

2. HANDLE

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

Deco handle and lift up alittle bit in arrow (!) direction

and push up with hand in arrow (_)direction and

disconnect.

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 anew one after sealing

well.

Handle, Deco

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

DECO handle and lift up in arrow direction (_ and push

down with hand in arrow direction _) and disconnect.

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

and disconnect.

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

disconnect.

Screw

Handle, Piece

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 (_ of a grille fan (L) from the main

body.

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.

Hook

Bracket, Ice Maker

Ice Maker Unit

Tray, Ice

Insulation

Sensor _

Cover, Sensor

Lever

Note : When the ice tray is not horizontal after assembly,

assembly must be wrong. Check and assemble

again.

- 105-

HOW TO DISASSEMBLE AND ASSEMBLE

5. DISPENSER

1) Disconnect button assembly by pulling down until it

stops and then pulling forward.

Button

4) Loosen four screws with a phillips screwdriver and pull a

funnel Assy to disconnect.

Funnel Assy

' <

' _:::__'

\..<

Funne

Assy

2) Remove display frame Assy by making a gap between a

display frame Assy. and funnel Assy. with a balde

screwdriver and pulling it forward. The cover dispenser

is fixed with a hook.

5) Duct cap Assy is disconnected if hold lever connecting

screw is loosened with a phillips screwdriver.

Solenoid Assy

Cap Assy, Duct

3) Display Assy can be disconnected by pressing the

upper part of a cover dispenser and pushing a display

Assy. after disconnecting display frame Assy. housing.

6) For assembling a duct cap Assy., insert one end of a

spring into the right hole of dispenser lever, and insert

the other end into the right hole in upper part of

dispenser. And then assemble a holder lever after fixing

a holder at a solenoid Assy working part.

Heater, Sheet

Solenc_" _ 'L'II'_A__Lever, Dispenser

- 106 -

HOW TO DISASSEMBLE AND ASSEMBLE

7) Dispenser Related Parts

1 FRAME ASSY, DISPLAY

2 COVER, DISPENSER

4 PWB(PCB) ASSY, DISPLAY

7 FUNNELASSY

8 SWITCH, MICRO

9 FRAME, FUNNEL

10 LEVER(SWITCH)

11 FUNNEL

12 RUBBER, FUNNEL

13 SWITCH, ROCKER

14 SOLENOID ASSY

15 SPRING

16 HOLDER, LEVER

17 CAP, DUCT

19 LEVER, DISPENSER

20 RUBBER, CAP

21 BUTTON ASSY

22 BUTTON

23 HOLDER, BUTTON

24 DECO, DRAIN

<@Cap Assy, Duct Detailed Drawings>

- 107-

HOW TO DISASSEMBLE AND ASSEMBLE

6. WATER TANK AND WATER LINE

• The water tank at back and lower part of a refrigerator is

fixed by one screw and has a capacity containing 7

glasses (180cc per glass) of cold water. It will take time

to make more cold water in the tank.

* The first portion of dispensed water is not cold even

though the refrigerator is working. In this case,

dispense ice first in the cup and then water to make a

cold water.

7. HOME BAR

7-1. Home Bar related parts

%2. Home Bar parts disassembly and assembly

1) Disconnect H/Bar Door Assy (D

2) Loosen two screws (_) attached on the refrigerator

compartment door with a phillips screwdriver. And

loosen 4 screws @ and two screws (_). Pull HIBar door

Assy (_), forward to disassemble,

3) Loosen two screws _), _) fixed on HIBar door Assy, and

two screws (_) with a cross driver to disassemble arm

Assy,

4) Assemble parts by performing the disassembly in

reverse order.

Note : •Assemble carefully parts (Z), (_, @ until they are

fixed firmly when assembling them.

•Adjust exteriorgap by adjusting parts _), (_) and

when assembling.

1.8 1.8

1 DOORASSY, H/BAR 7 SCREWTAPTITE(ARM)

2 SEREW,TAPTffE(HINGE-H/B) 8 ARMASSY

3 SCREWMACHINE(HINGE-H/B)9 STOPPER

4 HINGEASSYH/BAR 10 SCREW,MACHINE(STOPARiv_H/B)

5 HINGEASSYH/BAR 11 SCREWMACHINE(HINGE-H/B)

6 CAP,ARM

- 108 -

EXPLODED VIEW

FREEZER DOOR PART: GR-P247, GR-P207, GR-L247, GR-L207

- 109 -

EXPLODED VIEW

Ref No. : GR-L247, GR-L207, GR-B247, GR-B207

REFRIGERATOR DOOR PART

* : Optional part

-112 -

EXPLODED VIEW

FREEZER COMPARTMENT

* : Optional part

- 113 -

EXPLODED VIEW

REFRIGERATOR COMPARTMENT

: Optional part

-114-

EXPLODED VIEW

ICE & WATER PART

: Optional part

- 115-

EXPLODED VIEW

MACHINE COMPARTMENT

: Optional part

- 116 -

EXPLODED VIEW

DISPENSER PART

L.._.

- 117 -

LG LRSP2031BS User Manual REFRIGERATOR Manuals And Guides L0301007

LG Side by Side Refrigerator Manual L0301007 LG Side by Side Refrigerator Owner's Manual, LG Side by Side Refrigerator installation guides

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