LG LRTPC2031W, LRTPC2031BK, LRTPC1831W, LRTPC1831BK Owner’s Manual

2. PARTS IDENTIFICATION

FREEZER

COMPARTMENT

Freezer Shelf

Automatic Ice Maker

Lamp

Ice Cube Box

Freezer Temperature

Control Dial

REFRIGERATOR COMPARTMENT

Temperature

Control Dial

Lamp

Shelves

Egg Box

Snack Corner

Crisper

Used to keep fruits

and vegetables

fresh and crisp.

Freezer Door Bin

Door Cooling

On the refrigerator door, the cold air passageway is installedto supply

cold air to the doorside of the refrigerator

compartment.

Egg Tray Can Server

Dairy Corner Can Storage

Adjustable

Door Bin

Refrigerator Door Rack

Base Grille

Push the grille toward

the refrigerator

until it snaps

into place.

Leveling Screw

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(Inside)

3. DISASSEMBLY

3-1 DOOR

• Freezer Door

1, Remove the hinge cover by pulling it upwards,

2, Loosen hexagonal bolts fixing the upper hinge to the

body and lift the freezer door.

HINGE COVER

HINGE

BOLT

Figure 6

3. Pull out the door gasket to remove from the door foam

assembly.

3-2 DOOR SWITCH

1. To remove the door switch, pull out it with a slotted type

driver as shown in (figure 9),

2, Disconnect the lead wire from the switch.

LEAD WIRE

DOOR SWITCH

Figure 9

3-3 THERMOSTAT

1, Remove Control Box-R by loosening 2screws attached to

coiling of Refrigerator compartment (Figure 10)

2, Separate the thermostat and dial knob R 3, Remove the thermostat by disconnecting the lead wire,

GASKET

Figure 7

• Refrigerator Door

1. Loosen hexagonal bolts attaching the lower hinge to the body to remove the refrigerator door only.

LOWER HINGE

BOLT

Figure 8

2, Pull out the door gasket to remove from the door foam

assembly.

Figure 10

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3-4 FAN AND FAN MOTOR

1. Remove the freezer shelf. (If your refrigerator have an Ice Maker, disassemble the Ice maker first)

2. Remove the grille by pulling it out and by loosening a screw.

3. Remove the Fan Motor assembly by loosening 4 screws and disassemble the shroud.

4. Pull out the fan and separate the Fan Motor and Bracket.

SHROUD _'_,FANMOTOR

BRACKET

I I

3-5 DEFROST CONTROL ASSEMBLY

Defrost control assembly consists of Defrost Thermostat and FUSE-M

Defrost Thermostat functions to defrost automatically and it is attached to metal side of the Evaporator and senses

Temp. Fuse-M is a safety device for preventing over-heating of the

Heater when defrosting. At the temperature of 77°C, it stops the emission of heat

from the Heater.

1. Pull out the grille assembly.

2. Separate the connector connected with the Defrost Control assembly and replace the Defrost Control

assembly after cutting the Tie Wrap. (Figure 14)

FAN

Figure 12

3-6 LAMP

REFRIGERATOR ROOM LAMP

Figure 16-1

3-6-1 Refrigerator room lamp

1. Unplug the power cord from the outlet.

2. Remove refrigerator shelves.

3. Release the hooks on both ends of the lamp shield and pull the shield downward to remove it.

4. Turn the lamp counterclockwise.

5. Assemble in reverse order of disassembly. Replacement bulb must be the same specification as original.

(Max 40 W)

FREEZER ROOM LAMP

Figure 16-2

3-6-2 Freezer room lamp

1. Unplug refrigerator or disconnect power.

2. Reach behind light shield to remove bulb.

3. Replace bulb with a 25-watt appliance bulb.

4. Plug in refrigerator or reconnect power.

3-7 CONTROL BOX-R

1. First, remove all shelves in the refrigerator and Control Box-R by loosening 2 screws.

I I

Figure 13 HOLDERFUSE Figure 14

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COVER LAMP_@ Figure 17

2. Remove the Control Box-R by pulling it downward.

3. Disconnect the lead wire on the right position and seperate timer, themostat, Lamp socket, etc.

4. ADJUSTMENT

4-1 COMPRESSOR 4-14 Role

The compressor intakes low temperature and low pressure

gas evaporated from evaporator of the refrigerator, and condenses this gas to high temperature and high pressure

gas, and then plays delivering role to condenser. 4-1-2 Composition

The compressor includes overload protection. The PTC starter and OLP (overload protector) are outside the compressor. Since the compressor is manufactured to

tolerances of 1 micron, and is sealed in a dust - and moisture - free environment, use extreme caution when repairing it.

4-%3 Note for Usage (1) Be careful not to allow over-voltage and over-current. (2) No Strike

If applying forcible power or strike (dropping or careless handling), poor operation and noise may occur.

(3) Use proper electric components appropriate to the

Compressor.

(4) Note to Keep Compressor.

If Compressor gets wet in the rain and rust in the pin of Hermetic Terminal, the result may be poor operation and poor contact may cause.

(5) Be careful that dust, humidity, and welding flux don't

contaminate the compressor inside when replacing the Compressor. Dust, humidity, and flux due to welding which contaminates the cylinder may cause Iockage

and noise.

4-2 PTC-STARTER

4-2-1 Composition of PTC-Starter (1) PTC (Positive Temperature Coefficient) is a no-contact

semiconductor starting device which uses ceramic material consisting of BaTiO3.

(2) The higher the temperature is, the higher the resistance

value. These features are used as starting device for

the Motor. 4-2-2 Role of PTC-Starter (1) PTC is attached to Hermetic Compressor used for

Refrigerator, Show Case, and starting Motor.

(2) Compressor for household refrigerator applies to

single-phase induction Motor.

For normal operation of the single-phase induction

motor, in the starting operation flows in both main coil

and sub-coil. After the starting is over, the current in

subcoil is cut off. The proper features of PTC play all

the above roles. So, PTC is used as a motor starting

device.

4-2-3 PTC-Applied Circuit Diagram

• According to Starting Method for the Motor

OVERLOAD PROTECTOR(O.L.P)

PTC _ < _-_a_ COMPRESSOR

PTC STARTER HERMETIC

RSlR

4-2-4 Motor Restarting and PTC Cooling (1) For restarting after power off during normal

Compressor Motor operation, plug the power cord after 5 min. for pressure balance of Refrigerating Cycle and PTC cooling.

(2) During normal operation of the Compressor Motor, PTC

elements generate heat continuously. Therefore, if PTC isn't cooled for a while after the power has been

shut off, the motor will not restart. 4-2-5 Relation of PTC-Starter and OLP (1) If the power is off during operation of Compressor and

the power is on before the PTC is cooled, (instant shut- off within 2 rain. or unplugging and reconnecting), the

PTC isn't cooled and a resistance value grows. As a result, current can't flow to the sub-coil, the Motor can't

operate, and the OLP operates by flowing over current

in only in the main-coil.

(2) While the OLP repeats on and off operation about 3-5

times, PTC is cooled and Compressor Motor performs

normal operation.

If OLP doesn't operate when PTC is not cooled, Compressor Motor is worn away and causes circuit- short and fire. Therefore, always use a properly

attached OLR

4-2-6 Note to Use PTC-Starter

(1) Be careful not to allow over-voltage and over-current, (2) Do not strike

Don't apply a forcible power or strike,

(3) Keep apart from any liquid,

if liquid, such as oil or water away enters the PTC, PTC materials may fail due to insulation breakdown of

the material itself,

(4) Don't change PTC at your convenience,

Don't disassemble PTC and case, If the exterior to the PTC-starter is damaged, resistance value is altered and

it may cause poor starting of the compressor motor may cause.

(5) Use a properly attached PTC.

TERMINAL

Figure 19

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4-30LP (OVERLOAD PROTECTOR) 4-3-1 Definition of OLP

(1) OLP (OVERLOAD PROTECTOR) is attached to the

Compressor and protects the Motor by cutting the current to the Motor if the temperature rises and activates the bimetal spring in the OLR

(2) When over-voltage flows to Compressor motor, the

Bimetal works by heating the heater inside the OLP, and the OLP protects Motor by cutting off current which

flows to the Compressor Motor.

4-3-2 Role of the OLP (1) The OLP is attached to the Hermetic Compressor used

for the Refrigerator and prevents the Motor Coil from

being started in the Compressor,

(2) Do not turn the Adjust Screw of the OLP in any way for

normal operation of the OLR (Composition and connection diagram of OLP)

CONTACTING POINT

l TERMINALS - I./I

ADJUST SCREW

COVER

BIMETAL

ONTACT,NG

q PO,NT I

BIMETAL

5. CIRCUIT DIAGRAM

CIRCUITDIAGRAM

"IL YL

I i iICEMAKER

ICE Mi_R O_ pART

_ERMQ6TAT DEFRO6T,TIMER

CAPACITORPART P.T.CSTARTER

E&R3H pART

HEATER

WAI_RSUPPLYING11MECONTROLI OPllON

I_ CAUTION:PleaseunplugIllepowercord

fromIhewallcuret.

Figure 21

]

TIME

10.5sec 9sec

10sec 11sec 12sec

13sec 14sec

15sec

* I.AMP-F PART,CAPACITORS,IH E PLUGl_fPE, F._R_'I PART AND ICE MAI_R OPTION PART ON CIRCUIT

DIAGRAM ARE SUBJECT TO CHAN_E IN DIFFERENT LOCALITIES.

WH:WHI'_ BL:BLUE RD:RED GY:GRAYPURPLEYL:YELLOW BO:BRIGHTORANGE BK:BLACK BN:BROWN PR:PURPLE PK:PINK GN:GREEN

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' C"ONIi;;

SWITCHOFF 2 3

SWI SW2SW3

3854JD1046C

6. TROUBLESHOOTING

6-1 COMPRESSOR AND ELECTRIC COMPONENTS

Power Source.

Check the

resistance of Motor

Compressor,

__ Remove the PTC-

Starter from the Compressor and

measure the voltage between Terminal C of

Compressor and Terminals 5 or 6 of PTC.

_1 Applied voltage isn't

in the range of Rating Voltage +10%.

among M-C, S-C and

M-S in Motor

. heck the resistance

Compressor,

_,Y (Rating Voltage+_10%)? i YES __[_

-_OLP disconnected?

Replace OLR _-_

C°hed_kic°nnecti° n _1

Recon0ect.I

to use a regular Advise the customer i _-[_

transformer.

Replace Compressor.

N_O YES }__

Check the

resistance of PTC-Starter.

Check OLR

Check starting state,

of two terminals in

F heck the resistance i

PTC-Starter,

YES

b Check if applying I_OLP works within i YES _- [_a regular OLR L 30 sec, in forcible OLP I r

I I operation byturning _ Replace OLR i

Hinstant power on and _ r

starting voltage after 5

rain. for balancing cycle pressure and cooling the

b easure minimum

PTC.

the voltage of Rating Voltage +_10%

Components start in p O.K. i below. NO _' [_

YES

NO _'- Replace

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PTC-Starter.

6-2 PTC AND OLP

Normal operation of [__ __

Compressor is impossible or poor.

Separate the PTC- Starter from

Compressor and

measure the resistance between No. 5 and 6 of PTC-

Starter with a Tester or Wheatstone Bridge,

(Figure 21)

_' Compressor and check I v

the resistance value between two terminals ..._

ofOLPwith aTester, I NO

I Separate the OLP from YE_

(Figure 22) _1 -

Observation value is 220V/50Hz : 22£2+_30%

115V/60Hz : 6.8D+_30%

240V/50Hz : 33£2+_30%

127, 220V/60Hz : 22_2

+_30%

The resistance value

is 0 or several hundred £2.

The value is oo

Check another electric components,

Replace OLR

Check another ielectric components,

Replace PTC-

Starter

6-3 DEFROST TIMER

Normal operation of

the Defrost Timer is impossible,

No defrosting,

Poor cooling,

(_gure

Position the Cam Shaft to the point of first click

sound and check the current flowing between

terminals No. 1(brown) and No. 2(bright orange). Next, position the Cam Shaft to the point of

second click sound and check the current flowing

between terminals No. 1 (brown) and

No. 4 (black) (Figure 23).

Turn the Cam Shaft. I

with holding the Cam

i Shake about 3 times b

Shaft and Body softly.

21 _igure

The resistance is =. i_ I

0£2or variable,

The resistance is _._

220V/50Hz : 20K_ The resistance is about H

115V/60Hz: 7.8K_

NO _'

Loud click sound,

Replace the Defrost Timer,

Check the another electric components,

Replace the Defrost Timer,

Replace the Defrost Timer.

CamShaft__ ]_Jk'_: __

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F, ,,re

6-4 OTHER ELECTRIC COMPONENTS

• Cooling is impossible

doesn't run. the following

CompressorI Check,,current,,owstoi Cause

components.i I a. Thermostat

b. Starting devices

c. OLP _' or shorted. d. Compressor coil

e. Defrost Timer ,._ Poor contacting f. Circuit parts

_or shorted.

Poor contacting and

"- gas leakage.

Shorted or broken. Poor contacting

Coil shorted.

=;:>

indicated component.

Replace i

Compressor runs poorly.

• Cooling ability is poor Fan motor

doesn't run.

Check a starting Low voltage. voltage.

to starting devices, and broken.

Check if current flows Poor contacting _

Check current flowing Shorted. L in sub-coil of

Compressor,

Check capacity of OLE

The items described above are normal.

Check current flowing of the door S/W.

Check current flowing in the Fan Motor.

Lack of capacity. _--

Compressor.

Coil of motor

Poor contacting. _--_

Coil is shorted. _--

I -

Raise the voltage.

Replace indicated component.

the compressor,

Replace i

indicated component.

Replace i

i i

Much frost is built upon the EVAPORATOR.

Check the running condition of Timer.

Check current flowing of the following components,

• Defrost Thermostat

• Fuse-M

of the following components,

• L-cord

Check current flowing

• TE-Plate Heater

Running is poor, ____(Coil is shorted.)

Replace iindicated component.

Shorted. _--

Replace indicated component.

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6-4 SERVICE DIAGNOSIS CHART

COMPLAINT POINTS TO BE CHECKED REMEDY

Cooling is • Is the power cord unplugged from the outlet? * Plug to the outlet. impossible. • Check if the power S/W is set to OFF. * Set the switch to ON.

• Check if the fuse of power S/W is shorted. * Replace fuse.

• Measure the voltage of power outlet. * If voltage is low, correct wiring.

Cooling ability is poor.

Foods in the • Is food placed in cooling air outlet? * Place foods in high temperature section. Refrigerator (Front Part)

are frozen. • Check if the Dial is set to COLD. * Set the dial to MID.

Dew or ice • Is liquid food stored? * Seal up liquid foods with wrap. forms inside • Check if put in hot. * Put in foods after cooled down. the set. • Did you open the door of the set too * Don't open the door too often and close

Dew forms • Check if ambient temperature and humidity *Wipe dew with a dry cloth. This occurrence in the Exterior Case. of surroumcling air are high. is solved naturally in low temperature and humidity.

Abnormal • Is the set positioned in a firm and even place? *Adjust the Adjust Screw, and position noise, in the firm place.

• Check if the set is placed close to wall.

• Check if the set is placed close to stove, gas cooker and direct rays.

• Is the ambient temperature high or the room door closed?

• Check if put in is hot.

• Did you open the door of the set too often or check if the door is closed up?

• Check if the Control is set to WARM.

• Is the ambient temperature below 5°C? * Set the dial to WARM.

often or check if the door is closed, it firmly.

• Is there gap in the door gasket? * Fill up the gap.

• Are any unnecessary objects set * Remove the objects. in the back side of the set?

• Check if the Drip Tray is not firmly fixed. * Fix it firmly on the original position.

• Check if the cover of mechanical room * Place the cover at the original position. in below and front side is taken out.

• Place the set w_ the space of about 10 cm (4 inches).

• Place the set apart from these heat appliances.

• Make the ambient temperature below.

• Put in foods after cooled down.

• Don't open the door too often and close it firmly.

• Set the control to mid-position.

Door does not • Check if the door packing is dirty * Clean the door packing.

close well. with filth such as juice.

Ice and foods • Check if the inside of the set is dirty. * Clean the inside of the set.

smell unpleasant. • Did you keep fragrant foods without wrapping? *Wrap fragrant foods.

• In addition to the items described left, refer to the followings to solve the complaint.

Check if dew forms in the freezer,

Check Refrigerating Repair the cycle, Cycle,

Check the Replace the Thermistor Thermistor,

• Is the set positioned in a firm and even place? * Position in the firm place and level the

• Is too much food putted in the set? * Keep foods not to reach the door.

• It smells of plastic. *The new products smells of plastic, but it

Adjust Screw.

will go away after 1-2 weeks.

Replace the

_" is poor.

Defrosting

Components of defrosting circuit.

The cycle is faulty.

_, the Thermistor is

The operation of

poor,

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