LG LRSPC2341xx Service Manual

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

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

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

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

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

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

6. Use standard electrical components when replacing them.

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

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

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

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

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

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

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

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

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

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

WARNINGS AND PRECAUTIONS FOR SAFETY

- 3 -

SPECIFICATIONS

- 6 -

ITEMS SPECIFICATIONS

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

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

ITEMS SPECIFICATIONS

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

Heater, L-Cord

ANTI SWEAT HEATER Dispenser Duct Door Heater

Dispenser Heater

ANTI-FREEZING HEATER Water Tank Heater

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

3. Ref No. : GR-L247

948 890

1750

1720

685

745

796

840

1218.5

1750

SPECIFICATIONS

- 7 -

ITEMS SPECIFICATIONS

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

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

ITEMS SPECIFICATIONS

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

Heater, L-Cord

ANTI SWEAT HEATER Dispenser Duct Door Heater

Dispenser Heater

ANTI-FREEZING HEATER Water Tank Heater

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

4. Ref No. : GR-L207

948 890

1750

1720

600

660

711

755

1133.5

1750

PARTS IDENTIFICATION

- 14 -

Cover PWB

Water Tube

Humidity Switch

Lamp

Shelf

Egg Box Snack drawer

Vegetable drawer

Vegetable drawer/Meat drawer

Door rack

Guide bottle

Shelf

Door rack Wine holder (optional)

Lamp

Shelf

(Steel,

T/Glass)

Drawer

or Shelf

(optional)

Lower Cover

Milk product corner

Door rack

Drawer

Freezer

Compartment

Refrigerator

Compartment

Automatic

ice maker

Door rack

Conversion Switch

(Meats/Vegetables)

Cover Hinge

Frame Display

Dispenser Lamp

Ice & Water

Dispenser Button

3. Ref No. : GR-L247, GR-L207

4. Ref No. : GR-L247, GR-L207

PARTS IDENTIFICATION

- 15 -

Conversion Switch

(Meats/Vegetables)

Cover PWB

Water Tube

Humidity Switch

Lamp

Shelf

Egg Box Snack drawer

Vegetable drawer

Vegetable drawer/Meat drawer

Door rack

Guide bottle

Shelf

Door rack Wine holder (optional)

Lamp

Shelf

(Steel,

T/Glass)

Drawer

or Shelf

(optional)

Lower Cover

Milk product corner

Door rack

Drawer

Freezer

Compartment

Refrigerator

Compartment

Automatic

ice maker

Door rack

Cover Hinge

Frame Display

Dispenser Lamp

Ice & Water

Dispenser Button

1. Monitor Panel

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

2. Description of Function

2-1. Funnction of Temperature Selection

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

*< > : TAIBEI

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

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

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

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

MICOM FUNCTION

- 25 -

FRZ

Temp

REF

Temp

SELECT

Max

Min

Function Monitor

Freezer compartment

temperature control Button

Refrigerator compartment

temperature control Button

Dispenser selection button

123455

Max MaxMin

4321

FRZ

Temp

REF

Temp

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

Change of Indication Lamp

Temperature Control

Medium Medium Max Max Min Medium Min

Freezer -19 °C -22 °C -23 °C

-15 °C -17 °C

Control (-18 °C) (-20.5 °C) (-22 °C)

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

Refrigeration

3 °C 1.5 °C 0°C

6 °C

4.5 °C

Control (7 °C)

<2 °C> <1 °C> <0 °C> <4.5 °C> <3 °C>

FRZ

Temp

Max

Min

REF

Temp

FRZ

Temp

Max

Min

REF

Temp

FRZ

Temp

Max

Min

REF

Temp

FRZ

Temp

Max

Min

REF

Temp

FRZ

Temp

Max

Min

REF

Temp

2-2. 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.

MICOM FUNCTION

- 26 -

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 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 / cold storage room or home bar opened.

2. Buzzer rings three times in the interval of 0.5 second after the first one-minute has passed after doors are opened and then repeats three times of On/Off alarm in the cycle of every 30 seconds.

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

2-7. 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.

MICOM FUNCTION

- 27 -

Doors of freezing / cold storage room

or home bar

BUZZER

Closing

Opening

Within

a minute

A minute

seconds30seconds30seconds

Opening

Closing Closing

3 Times 3 Times 3 Times 3 Times

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.

MICOM FUNCTION

- 28 -

Function Load Operation Sequence Remark

In applying Initial power TEST MODE

When temperature of a frost removal sensor becomes more than 25°C (In purchase, movement)

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

If pressing switch once more in the test mode 2 or temperature of a frost removal sensor is more than 5°C, it immediately returns to the test mode for initial operation (COMP operates after 7 minutes).

When temperature of a frost removal sensor becomes less than 25°C (In power failure, service)

Test mode 1 (Compulsory function)

Test mode 2 (Compulsory frost removal)

POWER

COMP

WATER

TANK

HEATER

F-FAN

C-FAN

F-FAN

C-FAN

F-FAN

C-FAN

F-FAN

C-FAN

OFF

WATER

TANK

HEATER

OFF

STEP

MOTOR

DAMPER

STEP

MOTOR

DAMPER

OPEN

STEP

MOTOR

DAMPER

HOME

BAR

HEATER

POWER

FROST

REMOVAL

HEATER

HOME

BAR

HEATER

OFF

HOME

BAR

HEATER

TEST

S/W

(Press

Once)

COMP

TEST

S/W

(Press

2 times)

COMP

OFF

0.5

sec.

0.3

sec.

0.3

sec.

0.3

sec.

0.5

sec.

0.3

sec.

FROST

REMOVAL

HEATER

OFF

FROST

REMOVAL

HEATER

sec.

0.3

sec.

WATER

SUPPLY

DISPENSE

HEATER

sec.

0.3

sec.

0.3

sec.

0.3

sec.

0.3

sec.

0.3

sec.

0.3

sec.

0.3

sec.

0.3

sec.

OTHER

LOAD

OFF

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.

MICOM FUNCTION

- 29 -

: On : Off ●● : Normal

Note 1)

Trouble Code Indicator

F4 F3 F2 F1

No. Trouble items

Troubles

Freezer

Fan

Compressor

Stepping

Motor Damper

Defrost

Heater

Cooling

Fan

Operation Status During Trouble

Abnormal freezer(F) sensor

Abnormal refrigerator sensor 1(R1) (upper shelf in the refrigerator)

Abnormal refrigerator sensor 2(R2) (lower shelf in the refrigerator)

Abnormal defrost sensor

Faulty defrost

Abnormal freezer BLDC fan motor

Abnormal cooling BLDC fan motor

Abnormal room temperature sensor

Abnormal icemaker sensor

Abnormal icemaker unit

Freezer sensor is cut or shortcircuited

Upper shelf refrigerator sensor is cut or short-circuited.

Lower shelf refrigerator sensor is cut or short-circuited.

Defrost sensor is cut or shortcircuited

Defrost heater and temperature fuse are cut and disconnected. (Indicates after at least four hours when troubles occur)

No position-signal over 65s when fan motor operate

Room temperature sensor (RTSensor) is cut or short-circuited.

Icemaker sensor is cut or shortcircuited.

Fauity motor or hall IC in icemaker unit. Lead wire is cut or shotr-circuited. Faulty motor driving circuits

Standard

RPM

Standard

RPM

Standard

RPM

Standard

RPM

Standard

RPM

OFF (check

opeation per 30min. If normal condition, reset)

●●

Standard

RPM

●●

OFF (check opeation per

30min. If normal

condition, reset)

●●

15 min on/

15 min off

●●

No defrost

●●

Open for 10min

Close for

15min

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 Normal : A LED on, Abnormal : A LED Off. R2-Sensor Normal : B LED on, Abnormal : B LED Off. Icemaker Unit Normal : C LED on, Abnormal : C LED Off. Icemaker Sensor Normal : D LED on, Abnormal : D LED Off.

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 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.

MICOM FUNCTION

- 30 -

The rest of LEDs are all on.

Test 1

Test 2

Normal

Conditions

MODE HANDLING CONTENTS REMARKS

Press TEST s/w once.

Press TEST s/w once at TEST1 conditions.

Press TEST s/w once at TEST2 conditions.

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).

Returns to the initial conditions.

- 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.

Compressor starts after seven minutes delay.

3. PWB parts diagram and list

3-1. PWB Ass’y, main part diagram

1. GR-P247, L247, P207, L207

EXPLATION FOR MICOM CIRCUIT

- 50 -

3-2. Parts list

1. GR-P247, L247, P207, L207

EXPLATION FOR MICOM CIRCUIT

- 52 -

EXPLATION FOR MICOM CIRCUIT

- 53 -

WATER

SUPPLY

S/W

3-3. DISPLAY ASSY part diagram

1. GR-P247, L247, P207, L207

EXPLATION FOR MICOM CIRCUIT

- 56 -

DOUBLE SIDE TAPE SPREAD SHEET

3-4. DISPLAY circuit diagram

1. GR-P247, L247, P207, L207

- 58 -

Parts without ( ) mark means SMD parts.

Reception

Transmission

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

1. GR-P247, L247, P207, L207

EXPLATION FOR MICOM CIRCUIT

- 60 -

EXPLATION FOR MICOM CIRCUIT

- 61 -

1. TROUBLE SHOOTING

TROUBLE DIAGNOSIS

- 72 -

CLAIMS. CAUSES AND CHECK POINTS. HOW TO CHECK

1. Faulty start

1) No power on outlet.

2) No power on cord.

3) Shorted start circuit.

4) During defrost.

* Measuring instrument :

Multi tester

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

■ Check the terminal movement.

■

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

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

■ Check the resistance of both

terminals. At normal temperature 6 : OK. If disconnected : ∞.

Bad connection between adapter and outlet. (faulty adapter)

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

Bad connection between plug and adapter (faulty plug).

The distance between pins. Pin outer diameter.

No power on power cord.

O.L.P is off.

No electric power on compressor. - Faulty compressor .

Faulty PTC.

Disconnected copper wire.

Internal electrical short. Faulty terminal contact.

Disconnected.

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

Power is disconnected.

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

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

Loose contact.

- Large distance between male terminal.

- Thin female terminal.

T erminal disconnected. Bad sleeve assembly .

Power cord is disconnected. Faulty soldering.

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

was produced.

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

compressor. Bad terminal connection.

T oo loose. Assembly is not possible.

TROUBLE DIAGNOSIS

- 73 -

CLAIMS. CAUSES AND CHECK POINTS. HOW TO CHECK

2. No cooling.

2) Refrigeration system is clogged.

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

■ The evaporator does not cool

from the beginnig (no evidece of misture attached). The evaporator is the same as before even heat is applied.

Moisture clogged.

No electric power on thermostat.

Weld joint clogged.

Drier cloggeing.

Foreign material clogging.

Residual moisture

in the evaporator.

Residual moisture.

Insufficient drier capacity.

Residual moisture in pipes.

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

Caps are missed.

Air blowing.

During transportation. During work.

Not performed. Performed.

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

Air Blowing.

Leave it in the air. Caps are missed.

Short pipe insert. Pipe gaps.

T oo much solder .

T oo large. Damaged pipes.

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

During rest time. After work.

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

Not performed. T oo short. Impossible moisture

confirmation. Low air pressure.

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

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

Reduced cross section by cutting. - Squeezed.

Desiccant powder. Weld oxides. Drier angle.

Check on package condition.

Good storage after finishing.

TROUBLE DIAGNOSIS

- 74 -

CLAIMS. CAUSES AND CHECK POINTS. HOW TO CHECK

3. Refrigeration is weak.

Plate heater

Cord heater

1) Refrigerant Partly leaked.

2) Poor defrosting capacity. Drain path (pipe) clogged.

Defrost heater does not generate heat.

Weld joint leak. Parts leak.

Inject P/U into drain hose.

Foreign materials penetration.

Cap drain is not disconnected.

Inject through the hole.

Seal with drain.

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

input.

Parts disconnected.

Wire is cut.

- Heating wire.

- Contact point between heating and electric wire.

Dent by fin evaporator. Poor terminal contacts.

Wire is cut.

- Lead wire.

- Heating wire.

- Contact point between heating and electric wire.

Heating wire is corroded

- Water penetration.

Bad terminal connection.

■Check visually.

■Check terminal

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

P= —

R= —

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