LG LRSPC2301BS, LRSPC2331BK, LRSP2031BS, LRSPC2031T, LRSPC2031BK User Manual

...

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 not installed on the flat floor, the height of freezer and refrigerator door may not be the same.)

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

refrigerator compartment :

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

refrigerator compartment :

Height Difference'

Height Difference

Insert a driver 0 into the groove O of 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 a cup of 180cc with water for 3 seconds)

2. Install booster pump where the city water pressure is below 1,5kgf/cm 2for normal operation of water and ice dispenser.

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

water pressure drop.

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

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

• Please confirm the following installation parts,

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

NoHoles

Connector,(MECH)Pipe 4932JA3003C ConversionConnector(W28) 6631JA3004E NoHoles BalanceConector(W28) 6631JA3004F Packing(e26x3t) 3920JA3001C

NoHoles

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 Refrigeratorcompartment

temperature control Button temperature control Button

ax 5

Dispenser selection button

4Q3 2 1 Min 1 2 3 4 5 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

ofafrostremoval sensorbecomes morethan25°0

(Inpurchase, movement)

When __ temperature of a "_- frost removal

sensor becomes Iessthan 25°0

_-- (In power failure,

service)

Testmode 1

(Compulsory

function)

Testmode2

(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 8 FROST 03 HOME 5 HOME

POWER sec REMOVAL sec REMOVAL sec BAR sec BAR

HEATER HEATER HEATER HEATER

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

Iferroroccurs

during operation,

initialoperation is notdone.

Ifpressing 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 _ 4 N 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- circuitedFreezersensoriscutorshort- 115minoff5rainon/ StandardRPM © O ©

2 Abnormal Uppershelfrefrigeratorsensor is O Standard O O Openfcr/

refrigeratorsensor • •-¢-

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

3 Abnormal Note 1) Lowershelfrefrigeratorsensor is © Standard © © ©

refrigeratorsensor cut orshort-circuited. RPM 2(R2)(lowershelfin the refrigerator)

4 Abnormaldefrost • _A_ • • Defrostsensoris cut or short- © Standard © Nodefrost ©

sensor Y circuited RPM

5 Faultydefrost Defrostheaterandtemperature © Standard © © ©

_¢__¢___¢_ fuse arecutand disconnected. RPM

(Indicatesafter atleastfourhours when troublesoccur)

6 Abnormalfreezer No position-signalover65swhen O 0FF(ch_ O O O

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

30mi_7,_fn0rmal c0ndr_®,reset}

7 Abnormalcooling Noposition-signalover65swhen © 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.Faultymotor drivingcircuits

- 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 a circuit.

Voltage ofevery 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 + 24 00v

I_ + 33 I + CE3

<,R4 C 2 I BS(]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 a spontaneous power failure. 'LOW' voltage is applied to the reset terminal of MICOM in the beginning of power supply for a constant time (10ms). Reset terminal during general operation is 5V (No MICOM operates in failure of RESET IC).

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

T cg [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 1V

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 1V

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)

--, , T

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

0 V --,

0V --,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

R OOOR S/W

Measuring part

Doorof 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)

RF1 CON7

R30 _,_ 16.2KF F SENSOR

C 4I r

C015_ 2K D SENSOR

58 RSO

2 vv\

C022 2X

5g R51

o023i

104

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 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

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 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

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 itto 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

21 22 25

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

I I I I I I I I I I I

INA ,

I I I I I I I I I I I

/ ' ' I --L'

INB

I I I I

,-_ ,,,, } ,

A I

I I I I I I I I I

o_1

I I I I I I I

.._ I I

I I I

i i

I I I

I I I I

I ,

I I I I

' ' i

"T" I

I I I I I I I 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 T 225 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 R room 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 -

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