LG LRSPC2041T Owner’s Manual

WARNINGS AND PRECAUTIONS FOR SAFETY

Please observe the following safety precautions in order to

use safely and correctly the refdgarator and to prevent accident and danger dudng repair.

1. Be care of an electdc shock. Disconnect power cord from wall ot_let and wait for more then 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 electdc shock.

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

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

6. Use standard electrical components when replacing them.

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

and connecting parts.

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

9. Please check the evidence of moisture intrusion in the electrical components. Replace the parts or mask it

with insulation tapes if moisture intrusion was confirmed.

10. Do not touch the ioemaker 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 futl of water on the top of the

refrigerator.

14. Do not put glass bottles with full of water into the freezer. The contents shell 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

Ice

DispenserBurton

Cover Hinge

, _r--

Freezer Refdgerator

Compartment Compartment

Cover PWB

> Water Tube

n t-t

Automatic

ice maker

Lamp-

Sheff<

(Steel,

T/Glass)

Drawer_

or Sheff

(optional)

Door rack

Lower Covet

Conversion Switch

(MeatsNegetables)

-14-

Shelf

holder (optional)

Box

Shelf

drawer/Meat drawer

Humidity Switch

HOW TO INSTALL REFRIGERATOR

1. How to Adjust Door Height of Refrigerator

• Makethe refrigerator levelfirst. (If the refrigerator isnot installed on thefiat floor, the height offreezer and refdgerator 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 :

s %

s \

/ I ! ! t Screw t

t I

\_ )Driver s/

Insert a ddver O into the groove 0 of adjusting screw

and rotate driver in arrow direction (clockwise) until the refrigerator becomes horizontal.

Insert a driver 0 into the groove 0 of adjuslJng 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 180o:; 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,

iClass.

Conve-

Shape and Spec,

Valve Feed

rtible

Water Valve

Water

Conn- ector

Connector,(MECH)Pipe ConversionConnector(3/4") BalanceConector(3/4") Pecking(e24x3t)

Connector, (MECH) Pipe

4932JA3003B ConversionConnector(W25)

BalanceConectoor(W25)

Packing(_23x3t)

Connector,(MECH)Pipe

ConversionConnector0N28) BalanceConector(W28)

Packing(e26x3L) Connector,(MECH)Pipe

ConversionConnector(1/2") BalanceConector(l/Z') Packing(_l9x3t)

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

• Please confirm the following installation parts.

Valve Feed Rubber, Packing Connector. Pipe

O Co_nn_tor, Pipe Tape, Te_flon

Nomenclature

PINg Remarks

5221JA3001A Common Use

4932JA3003A 6631JA3004A

6631JA3004B 3920JA3001B

6631JA3004C 6631JA3004D

3920JA3001A

4932JA3003C

6631JA3004E 6631JA3004F 392gJA3001C

4932JA3003D 6631JA3004G No Holes 6631JA3004H

3920JA3001D

No Holes

-19-

HOW TO INSTALL REFRIGERATOR

1. Connection of Pipe Connector A and B.

1) Turn off main valve of water pipe.

2) Disconnect water tap from piping by loosening nuts.

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

the pipe connector with sealing tapes.

4) Connect feed valve to pipe connector A.

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

connector A only and install feed pipe.

Single Lever Type Faucet

(general)

Pipe Connector B - Feed

Valve

Two Hands Type Faucet

How to wind

Sealing Tapes.

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.

GenemlType

Feed

Valve

Single LeverType Faucet(one hole, techtypeand hand spra_

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.

Water Tube

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

- 20 -

HOW TO INSTALL REFRIGERATOR

3. When customer uses bottled waten *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 alter 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 wifi come out due to pressure drops.

• Use standard feed tube to prevent leaking.

p t "_

• Outtemal Filter

1. Filter Fixation

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

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

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

Inlet

HotWater

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 mince until clean water comes out.

FilterInlet

Filter_

Water

Cold 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 (C)) and lifting it to the direction ((_)) and move itto the lower part.

2. Remove the lamp cover by pressing the protrusion

under the cover and pulling the cover to the front,

• After installing water filter Reassemble the lamp cover and the top shelf of the

refrigerator. To place the top shelf of the refrigerator, raise

• Installing water filter

1. Initial installation of water filter Remove the filter substitute cap by turning it

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

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

filter.

Remove the red cap from the filter and attach the sticker, Insert the upper part of the filter ((_)) after aligning with the guideline marked on the control box, and fasten itby turning it clockwise by 90 degrees.

Note : Check that the guideline and the fastening

indication line are aligned.

the front part of the shelf a bit so that the hook of the shelf

is fit into the groove. In order to clean the water fi]tersystem, 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.

and the fastening indication line

lUide line

Control box

and the looseningindicationline

,,,,°,°

2. Replacement of water filter While holding the lower part of the filter,turn it

countemlockwise ((_)) by 90 degrees and pull it down.

Note :Check that the guideline and the loosening

indication line are aligned.

- 22 -

HOW TO INSTALL REFRIGERATOR

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

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

1.Pull out the ice bank in the upper partof 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 dngs(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 smell. Put a water container under the ice tray and press test switch.

4) When ice tray rotates, the water in itwill 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

_/__ /_ Icemaker

..................... Test Switch : O ]

IToomooh "-. :

_=_.-_'...o;_-- Optimum level% '._ /

",_ IIToolittie .. "•.. I ..

* 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.

• Water Supplying Time Control Option

SWITCH NO Water Suppling

S/W1 I S/W2 S/W3 Time

OFF I 0FF ' oFF ' 6._Sec......

ON I OFF OFF 5.5 Sec.

OFF i ON OFF

ON I ON OFF

OFF ] OFF ON

i....

ON OFF ON

oFF.....5, ON

ON ..... oN ON

6 Sec. 7 Sec.

7.5 Sec. 8 Sec.

9Sac

i 10 Sec.

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

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

2) The amount of water supplied depends onthe 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

Function Monitor

, [ \

/ \ '_

Freezer cornpertruant Refdgerator cornparWenl

temperature contzc4Button lemperatore control Button

t"t

Dispenser se_ectio_ b:Jtt0_

1-2. GR-C247, GR-C207, GR-B247, GR-B207

2. Description of Function

2-1. Funnction of Temperature Selection

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

• _= =_-':.-=- ....... == • =

Change of Indication Lamp

_--_--I _--u=-- i I--K_-- i i--u_-- i i--t--I

@@ @@

Temperature Medium Medium Max Max Min Control

Freezer -19 °C -22 °C -23 °C Control (-18 °C) (-20.5 °C) (-22 °C) -15 °C

<-19 °C> <-20.5 =C> <-22 °C> <-15,5 °C>

Refrigeration 6 °C

Control 3 °C 1.5 °C 0°C (7 °C)

<2 °C> <1 °C> <0 °C> <4.5 °C>

* The ¢mtx_a tire can vary.:!:3_C depending on the load condition. *( ) : 127V/6011z,110~I15vi60llz, 115v/60Hz Rating ONLY.

1. When power is initially applied or reapplied after power cut, =Medium" is automatically selected.

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

"Medium" --, "Medium Max" --, "Max" _ "Min" --, "Medium Min" _ "Medium"

3. The temperature setting condition of freezer and refrigerator compartments shall not be indicate in the standard model

(GR-P247, GR-P207, GR-L247, GR-L207, GR-C247, GR-C207, GR-B247, GR-B207) when refrigerator or home bar door is closed.

-25-

*< >:TAIBEI

Medium Min

-17 °C

<-18 *C>

4.5 *C

<3 °C>

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 piece 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 hack. Alter the machine is powered again, crashed 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 inother 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 MIC room fan motor

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

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

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

2-6. 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 I 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 fraezing / cold storage room or home bar are closed during door open alarm, alarm is immediately

released.

Doors of freezing / r-------t i cold storage room C_Opening_ Opening

or home bar : =

BUZZER

Within =: i A minute

a minute

3T_nes 3Ti_es 3Ti_ 3"nrnes

"i'30 i 30 i 30 i

secondssecondsseconds

: v:

Closing

2-7. Ringing of button selection buzzer

1. If pressingthe 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 dngs.

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 iftwo hours have passed after starting frost removal.

4. No removal isdone 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 OperaUon Sequence

Remark

Whentemperetum

ofa Ifost removal sensorbecomes morethan25_C

(In purchase,

movement)

When temperature of a

frost removal

sensor becomes

less than 25°C (In power failure,

service)

Testmode1 (Compulsory

function)

Testmode 2

(Compulsoryf_ost removal)

POWER sec. COMP sec. & sec. MOTOR sec. BAR

POWER sec. REMOVAL sec. REMOVAL sec. BAR sec, BAR

0.3 WATER 5 WATER 0.3 SUPPLY 5 0.3 ___c TANK _ TANK _ & &

HEATER HEATER )ISPENSE _ _ C-FAN

TEST OTHER sec. COMP sec. F-FAN STEP

(Press OFF ON C-FAN DAMPER Once) ON OPEN

TEST COMP s0_3. F-FAN 0.3; FROST 0.3 STEP

(Press OFF C-FAN HEATER DAMPER

2 times) OFF ON CLOSE

0.5 0.3 F-FAN 0.3 STEP 0.3 HOME

ON ON ON ON ON

_0.5 FROST 8 ; FROST 0.3 HOME 5 HOME

HEATER HEATER HEATER HEATER

ON ON OFF ON OFF

sec. sec sec. COMP sec. F-FAN

ON OFF i HEATER ON ON

S/W -_ LOAD _ _ & sec. MOTOR

S/W __ __ & _ REMOVAL _ MOTOR

C-FAN , DAMPER HEATER

WATER

0.3 0.3 0.3

If erroroccurs

during operation,

initialopera'donis notdone.

Ifpressing switch

onos more in the test mode 2 or

temperature of a frost removal

sensor_ rnor_

than 5°C, it

immediately returns to the tesl

mode forinitial 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 offailure, pressing the functionadjustment button does not perform function and only alarm sound ("Ding-'_ tings.

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

4. Failure code isdisplayed 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

TRouBLECOOEINDEX

F4F3 F2F1

Tn_bleCodekxtcalor OperaSonStatus Dudng Trouble

No. Troubleitems Troubles Freezer Cooling Defrost Stepping

1 Abnormalfreezer(F) • • O,,. _ Freezersensoriscutershorl- 15minod Standard © © ©

sensor _Y- droaltad 15min_ RPM

2 Abnormal Uppersheffrefrigeratorsensor is © Standard © © ._f_'/

re" erator sonsor cut or shott-ciroJited. RPM in the refrigerator) /C_1_

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

refrigeratorsensor cutor shert-drcuited. RPM 2(R2) (lower shelf in

the refuter)

4 Abnormaldefmst • _ • • Defrostsensoriscutershod- C) Standard © Nodefrost ©

sensor Y circuited RPM

5 Faultydefrost Defrostheater andtemperature © Standard © © ©

6 Abnormalfl-eezer NopoaliJon-signalover65s when © 0FF(0t_e_ O O ©

BLDCfan motor .._ • • _ fanmctor operate 01_pa

7 Abnormalcooling No position-signalover65s when © C, OFF[ched_ C.) O

BLDCfan motor • • _ bnmotoroperate _q_lr_

F4 F3 F2 F1 C0¢prsssor Fan Fan Heste_ Ill0t0rDanper

_(_ __ fuseare sotanddisconnected. RPM

(Indicatesafter at leastfour hours whentroubles occur)

G R-P(L)207,247* RA(QA)

0- :On •:Off ©:Normal

0m_lnmd

_ld.m.re_

8 Abnermal room Not© 1) Room temperaturesensor(RT- © © © © ©

temperaturesensor Sensor) is cut or shod_rcaltad.

g Abnofl'nal icemaker Note 1) Icemakersenseris cut or short- © © © © ©

sensor drcuited,

10 Abnormal icernaker Note1) Faultymotoror hall IC in © Standard © O ©

unit icemakerunit, Leadwire iscut er RPM

shotr-circuitnd.Faulty motor drivingc_rcuits

- 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).

Normal : (_) LED on,

R2*Sensor Icemaker Unit

i T-Sensor

Icemaker Sensor

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 not perceived during performance of test mode but only warning sounds ring.

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

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

display the failure code.

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

MODE

Test 1

HANDLING

Press TEST s/w once.

Normal : (_) LED on,

Normal : _) LED on, Normal : (_ LED on,

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)

Abnormal : (_) LED Off. --]

Abnormal : (_) LED Off. L The rest of LEDs Abnormal : (_) LED Off. | are all on.

Abnormal : (_) LED Off.

CONTENTS REMARKS

- Forced operate.

- Freezer fan is off when

door is opened.

Test 2

Press TEST s/w once at TEST1 conditions.

1.Compressor isoff

2. Freezerfan, Cooling fanare off.

3. Defrostheateris on.

4. All displayLEDsare off. (Freezer room"2"

LEDand Refrigeratorroom"2" LEDare

- it returns to normal

conditions when the temperature of defrost

sensor is above 5°C.

- Forced defrost.

onlyON.)

5. Steppingmotordamper is inclosed.(baffle

isclosed).

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

Conditions TEST2 conditions, seven minutes delay.

- 30 -

EXPLATION FOR MICOM CIRCUIT

1. Explanation for PWB circuit

1-1. 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, GEl) converting AG voltage to DC voltage, the switching part (IC2) switching the converted DC voitage, transformer transferring energy of the primary side of the switching terminal to the secondary side and the feedback part (IC3, IC4)

transferring it to the primary side.

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

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

Voltage of every part is as follows:

Voltage 220 Vac /inspection Vdc | 16 Vdc 12 Vdc 15,5 Vdc 5 Vdc

EOI

m._-15os 1 --IR_-S-7

L :

CONll _ mI_

- +

- 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 ICl (MICOM). The OSCl must always

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

<GR-L207ERA, GR-L247ERA>

i . 30

CST4.OOMGWi I J-,

<GR-B207ERA, GR-B247ERA>

FpT i7

r_-t osc!r7 !

t Rf030_1M

L½-JJ

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 (lOres).

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

<GR-L207ERA, GR-L247ERA>

CC9 2

104 _ _ /_T7104

CClO

CC9104 2 /7_104

<GR-B207ERA, GR-B247ERA>

1 IC7 5 _[I Rrl

0C8

4.7K

- 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.

t GR-L207ERA, GR-L247ERA

Type of Load

Measuring part (IC6)

Status OFF

t °H

COMP

No.16

Frost Removal

Heater

NO.15

C0N2

CON4

AC Converting

Relay

No.16

Within 1 V

12V

RY6

ALD112

010

R-room LAMP

IC7-13 IC7-14

lCl

(MZCFIM)

1=73

(AIN13)

pTt

(AI_I)

p72

(AIN12)

P76

(AIN1e)

Water Tank

Heater

R-LAMP

HIBAR-HEATER

pot

CON_

p04

-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.

Type of Load

Measuring part (IC7)

Status OFF

--@

PO_:R

COMP

No.10

F___ R C/P/_0M p 0tJ>

DEF-NEAT[R

Frost Removal

Heater

No.ll

CON2

AC Converting

Relay

No.12

Within 1 V

12V

RY2

JW1oFHN

__ 10 7 2

R-room LAMP

No.14

:2 5 a

RY3

11 6 3

Homebar

Heater

No.16

IC1

(MtCOM)

P73

P71

(,_Nll)

P72 t_N12)

]][]DR SIW $1W

H/BAR R-_BOR CON3

- 34 -

RY4

14 3 12

P03

P06

EXPLATION FOR MICOM CIRCUIT

2, Dispenser oper_ion circuit

POWlER

AUGER MOTOR

OISPENSE CUB[

LEVERs_Rw SOLENOID

SOLENOID

DIS_=ENSER

CON4

CON.=

Q.lU,_+120

RY'5

ALD112

DI2

R'r]O

D14

P74

(AIN14)

P75

(AINI_)

P77

(AIN17)

PO0

It1

(MICOM)

p02

ALDl12

PILOT VALVE

DISP-LAMP

DI5

,_- _ m

t) Check load driving status

WATER VALVE

ICE WATER

IC6-N0.11 IC6-No,10

Within I V

12V

SOLENOID

DISPENSER

No.12

Type of Load

Measuring part

Status OFF

GEARED

MOTOR

IC6-No.13

SOLENOID

CUBE

IC6-No.12

2) Lever S/W sensing circuit

"'----._fing pat ICl(Micom) (No. 16)

LeverS/W

On(P,eaal 5V I-_ I---1 F-I (5o._)

OV_ L_ _ L._

OFF 5V

P03

PO_

HOME BAR

HEATER

No.lO

SOLENOID

PILOT

No.16

-35 -

EXPLATION FOR MICOM CIRCUIT

3. Door opening sensing circuit

<GR-L207ERA, GR-L247ERA>

I,,, I R_3

_'" .,4 __=____

<GR-B207ERA, GR.B247ERA>

rA_oal0_f

_.CONDITIONS Bell sounds when button on OFF

vlEASURING_ dosplay is pressed. )OINTS

,0.05s, 0.2s ,0.1s, O.4s ,

ICl (No. 48 Pin)

OV_ L r +--

IC1 (No. 51 Pin)

0 V 163kz (DING)_, 2121 kz (DONG

Beep sounds when warning /

door opening.

!. O.5s ,=!. O.5s ,,

5V '" rs., r._ff OV --,

OV --_2.63kz BEEP.....

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

__ IC1 (MICOM) No. 47, 46 Pin

Closing ! 5 V (_)" (_)' (_ l (_) " S/W at b°th ends are at Off status)

Opening I 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.

:k 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

P66

(AINU;

P65

(A_HS:

ICI

(MICFIM)

P62

(AIN2;

P63

(AtN3]

P6€ 30

CAIN4;

16,2Kr

104/7_

CCI5_- 2K

io_'7

i RR1RSO 26.1KF

104'7 RR2

ccz__ _

tO4--

R51 26.1KF

R52 IB._K_

RIM1

cczJ-

I(7_F RT-SNR

CON7

_ £-SENSOR

CON8

CON9

D-SENSOR

R2-SENSOR

R1-SENSOR

ICE MAKER SENSQR

.,21'o',7

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 c_)Voltage

POINT _ Voltage

POINT (_ Voltage POINT (_ Voltage POINT (_) Voltage

NORMAL(.30 °C ~ 50 °C)

0.5 V~4.5 V

- 37 -

INSHORT

IN OPEN

EXPLATION FOR MICOM CIRCUIT

2) GR-B207ERA, GR-B247ERA

IC1

MICOM)

(AJN6

(AIN5

(AiN2)

(AIN3)

(AIN7)

P6@

P6_

P6;

P63

P67

CC17JL 2K

a36 I6,2KP

R37 26.1KF

T RF1

cc_91 _?

104f7 _

'°' ,% .,,

104f_

CCllJ_lO4n_. _ _ RT-SENSOR

R40 26.1K_

R21 10KF

T RR1

CON5

D-SENSOR

_ F-SENSOR

CON6

_ 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, iee-makin 9 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

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/W, electronic single motor damper reed S/W for examining refrigerator.

t) GR-L207ERA, GR-L247ERA

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

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

4R72_] 18 m[_ 4"7_ 18 11 iC 1

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:

2) GR-B207ERA, GR-B247ERA

'MICOM' 20

'°1 l

R49 lip12

R48 S/W1

4.7K

I_ 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

OP1

Connection Export model

OUT Domestic model

- 39 -

EXPLATION FOR MICOM CIRCUIT

1=8.Stepping motor operation circuit

IC10 CON9

TA7774P

9,16

MIC[]M

CE8 1,2

<ICl)

P14

P15

PI6

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 ddving method of the stepping motor, send signals inthe 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.1O, 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, INS)

as IC (TA7774AF) for motor ddving allows motor coils wound on each phase of stator to form rotation magnetic field and the stepping motor damper to rotate

luF V_

i_ 9 A

14 I 0 B STEPPING

I1 11

I - +

10 12

CCW (Reverse rotation) <--- --I_ (Positive rotation) CW

I I i I i i i i i i

I I I i i i i I i i

INA

I I I I I I I I I

INB

I I I I i I i I i

i J I e i o i e o e i I J e t i i i i I i J

i i I I i

I I I I I t I i I i

i i

'i! i i

o i I I i

I I a I I J

I I J I I

-40-

EXPLATION FOR MICOM CIRCUIT

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

1. This circuit performs function to make standby power '0' by cutting off power suppfied to ICa 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 cuWng 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

Motor ON

ICI

(HIC[]H)

C-FAN PVH

C-FAN LBCM

l @ @part

P5,$

P51

2 - 3V

4.7K RS5

_3 3.9K

R34_

ZD4

lN4735A

6.2V

R36

33O

R44

33O

(_) part

2V or less

12 ~ 14V

KTA1705

620 q

05IK05TTC3198Z'

(_) part

2V or less

8 ~ 16V

o2o i0c1,

,02/25v7 T22,

(_ _)part

0V 0V

CON7

F-FAN PVM

P55

F-FAN LOCK

52 S,gK

PSO

4.7K

1N4735

6.2V

R42

R43

102

-41 -

EXPLATION FOR MICOM CIRCUIT

2) GR-B207ERA, GR-B247ERA

IC1

'MICOM)

C-FAN PWN

C-FAN LOCK

F-FAN Pk#M

P54

P51

P53

R31

33O

KTA1705

4.7K R,34

3.9K

R33_

zo2

IN4735A 102

6.2V _ F_

620

R29

VV_

- D13

_'FR102

£mq

220,uF

_7 _ __ CC16

/25V T 223

CON5

F-FAN LOCK

P50

"_"! "I :;c=1°="'°_ _T _%

1N4755A _ -]_ 102

6.2v ,._

- 42 -

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