LG LRFD25850SB User Manual

CAUTION

BEFORE SERVICING THE UNIT,
READ THE SAFETY PRECAUTIONS IN THIS MANUAL.

REFRIGERATOR

SERVICE MANUAL

COLOR:WESTERN BLACK

MODEL: LRFD25850SB

SAFETY PRECAUTIONS....................................................................................................................................................... 2

1. SPECIFICATIONS............................................................................................................................................................... 3

2. PARTS IDENTIFICATION................................................................................................................................................... 4

3. DISASSEMBLY................................................................................................................................................................ 5-8

REMOVING AND REPLACING REFRIGERATOR DOORS ...............................................................................................5

DOOR.............................................................................................................................................................................. 6-7

TO REMOVE THE DISPENSER .........................................................................................................................................7

DOOR ALIGNMENT............................................................................................................................................................7

FAN AND FAN MOTOR...................................................................................................................................................... 8

DEFROST CONTROL ASSEMBLY.................................................................................................................................... 8

LAMP.................................................................................................................................................................................. 8

CONTROL BOX-REFRIGERATOR.................................................................................................................................... 8

MULTI DUCT ...................................................................................................................................................................... 8

4. ADJUSTMENT............................................................................................................................................................... 9-10

COMPRESSOR.................................................................................................................................................................. 9

PTC-STARTER................................................................................................................................................................... 9

OLP (OVERLOAD PROTECTOR).....................................................................................................................................10

TO REMOVE THE COVER PTC.......................................................................................................................................10

5. CIRCUIT DIAGRAM.......................................................................................................................................................... 11

6. TROUBLESHOOTING................................................................................................................................................. 12-17

COMPRESSOR AND ELECTRIC COMPONENTS.......................................................................................................... 12

PTC AND OLP.................................................................................................................................................................. 13

OTHER ELECTRICAL COMPONENTS ........................................................................................................................... 14

SERVICE DIAGNOSIS CHART........................................................................................................................................ 15

REFRIGERATION CYCLE .......................................................................................................................................... 16-17

7. OPERATION PRINCIPLE & REPAIR METHOD OF ICEMAKER .............................................................................. 18-21

8. DESCRIPTION OF FUNCTION & CIRCUIT OF MICOM ........................................................................................... 22-33

9. EXPLODED VIEW & REPLACEMENT PARTS LIST ..................................................................................................... 34-

CONTENTS

- 2 -

Please read the following instructions before servicing your
refrigerator.

1. Check the refrigerator for current leakage.

2. To prevent electric shock, unplug before servicing.

3. Always check line voltage and amperage.

4. Use standard electrical components.

5. Don't touch metal products in the freezer with wet
hands. This may cause frostbite.

6. Prevent water from spiling onto electric elements or the
machine parts.

7. Close the top door before opening the bottom door.
Otherwise, you might hit your head when you stand up.

8. When tilting the refrigerator, remove any materials on
the refrigerator, especially the thin plates (ex. glass
shelf or books.)

9. When servicing the evaporator, wear cotton gloves.
This is to prevent injuries from the sharp evaporator
fins.

10. Service on the refrigerator should be performed by a
qualified technician. Sealed system repair must be
performed by a CFC certified technician.

SAFETY PRECAUTIONS

21 cu. ft. / 25 cu. ft.

1. SPECIFICATIONS

- 3 -

ITEMS SPECIFICATIONS

DOOR DESIGN Side Rounded
DIMENSIONS (inches)

35 3/4 X 30

X 69

3

/4 (WX

DXH) 21cu.ft

35 3/4

X 34

1

/4

X 69

3

/4

(WXDXH) 25cu.ft

NET WEIGHT (pounds)

298 (

21cu.ft)

320 (

25cu.ft)
COOLING SYSTEM Fan Cooling
TEMPERATURE CONTROL Micom Control

Full Automatic

DEFROSTING SYSTEM

Heater Defrost
DOOR FINISH Embossed Metal, VCM, Stainless
HANDLE TYPE Bar
INNER CASE ABS Resin
INSULATION Polyurethane Foam

ITEMS SPECIFICATIONS

VEGETABLE TRAY Opaque Drawer Type
COMPRESSOR PTC Starting Type
EVAPORATOR Fin Tube Type
CONDENSER Wire Condenser
REFRIGERANT R-134a (115 g)
LUBRICATING OIL ISO10 (280 ml)
DEFROSTING DEVICE SHEATH HEATER

LAMP

REFRIGERATOR 60 W (2EA)
FREEZER 60 W (1EA)

2. PARTS IDENTIFICATION

- 4 -

Refrigerator Light

Shelves

Optibin Crisper

Keeps fruits and

vegetable fresh

and crisp

Customcube

Icemaker

Glide N Serve

Cover Front

Ice Bin

Durabase

Divider

Modular Door Bins

Filter

Pull out Drawer

Freezer
Door Rack
(LRFD25850** Only)

Modular Door Bin

Modular Door Bin

Wine Holder

Dairy Bin

Egg Box

3-1 REMOVING AND REPLACING REFRIGERATOR DOORS

● Removing Refrigerator Door

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CAUTION: Before you begin, unplug the refrigerator. Remove food and bins from doors.

uu

Left Door

1. Disconnect water supply tube by pushing back on the disconnect ring (4).

2. Open door. Loosen top hinge cover screw (1).
Use flat tip screwdriver to pry back hooks on front underside of cover (3). Lift up cover.

3. Disconnect door switch wire harness (2). Remove cover.

4. Attach the tube on the door with door.

5. Pull out the tube.

6. Disconnect the three wire harnesses (5). Remove the grounding screw (6).

7. Rotate hinge lever (7) counterclockwise and remove. Lift top hinge (8) free of hinge lever latch (9).

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CAUTION: When lifting hinge free of latch, be careful that door does not fall forward.

8. Lift door up from middle hinge pin (10) and remove door.

9. Place door, inside facing up, down onto a non-scratching surface.

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Right Door

1. Open door. Loosen top hinge cover screw (1). Lift up cover (3).

2. Disconnect door switch wire harness (2). Remove cover.

3. Disconnect wire harness (5). Remove the grounding screw (6).

4. Rotate hinge lever (7) clockwise and remove. Lift top hinge (8) free of hinge lever latch (9).

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CAUTION: When lifting hinge free of latch, be careful that door does not fall forward.

5. Lift door up from middle hinge pin (10) and remove door.

6. Place door, inside facing up, down onto a non-scratching surface.

3. DISASSEMBLY

- 5 -

4

3

1

4

6

2

7

8

9

5

1

7

8

3

2

6

5

9

- 6 -

3-2 DOOR

● Door Gasket Removal

1. Remove door frame cover

Starting at top of cover and working down, snap cover
out and away from door.

2. Remove gasket bracket clips

There are two clips on each door. Start bracket removal
near one of the middle clips.

1) Pull gasket back to expose gasket bracket clip and
door frame.

2) Insert a flat tip screwdriver into seam between gasket
bracket and door frame and pry back until clips snaps
out.

3) Continue prying back along seam until all clips snap
out.

3. Remove gasket

Pull gasket free from gasket channel on the three
remaining sides of door.

● Door Gasket Replacement

1. Insert gasket bracket clips

1) Insert gasket bracket edge beneath door frame edge.

2) Turn upper gasket bracket spring so that the spring
ends are in the door channel.

3) Push in clip until you hear it snap securely into place.

4) Push in remaining two clips until you hear each snap
securely into place.

Note: Make sure that no part of gasket bracket edge

protrudes from beneath door frame edge.

2. Insert gasket into channel

1) Snap gasket assembly into the door bracket.

<Inserting the Gasket Assembly into the Bracket Door>

Frame Cover

Handle

Figure 1

Figure 2

Figure 3

Door

Frame

Gasket
Bracket Clip

Spring

IncorrectCorrect

Figure 4

Figure 5

Correct

Incorrect

Gasket

Door

Bracket Clip

Frame

Flat Tip

Screwdriver

Gasket

Bracket

- 7 -

2) Press gasket into channels on the three remaining
sides of door.

3. Replace door frame cover

Starting at top of cover and working down, snap cover
back into door.

3-3 TO REMOVE THE DISPENSER

1. Use fiat tip screwdriver to pry back hooks on botton
underside of cover dispenser.

2. Pry off cover dispenser.

Disconnect wire harness.

3. Replace cover dispenser in opposite manner and order
of removal.

3-4 DOOR ALIGNMENT

If the space between your doors is uneven, follow the
instructions below to align the doors:

1. With one hand, lift up the door you want to raise at
middle hinge.

2. With other hand, use pliers to insert snap ring as shown.

3. Insert additional snap rings until the doors are aligned.
(Three snap rings are provided with unit.)

Figure 6

Figure 8

Figure 9

Figure 10

Figure 7

3-5 FAN AND FAN MOTOR

1. Remove the freezer shelf. (If your refrigerator has an
icemaker, remove the icemaker first)

2. Remove the plastic guide for slides on left side by
unscrewing phillips head screws.

3. Remove the grille by removing one screw and pulling the
grille forward.

4. Remove the Fan Motor assembly by loosening 2 screws
and disassembling the shroud.

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

3-6 DEFROST CONTROL ASSEMBLY

Defrost Control assembly consists of Defrost Sensor and
FUSE–M.

The Defrost Sensor works to defrost automatically. It is
attached to the metal side of the Evaporator and senses its
temperature. At 72°C, it turns the Defrost Heater off.

Fuse-M is a safety device for preventing over-heating of
the Heater when defrosting.

1. Pull out the grille assembly. (Figure 12)

2. Separate the connector with the Defrost Control
assembly and replace the Defrost Control assembly
after cutting the Tie Wrap. (Figure 13)

3-7 LAMP

3-7-1 Refrigerator Compartment 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. Assembly is the reverse of disassembly. Replacement
bulb must be the same specification as the original
(Max. 60 W2EA).

3-7-2 Freezer Compartment Lamp

1. Unplug refrigerator or disconnect power.

2. Reach behind light shield to remove bulb.

3. Replace bulb with a 60-watt appliance bulb.

4. Plug in refrigerator or reconnect power.

3-8 CONTROL BOX-REFRIGERATOR

1. First, remove all shelves in the refrigerator, than remove
the Refrigerator control Box by loosening 2 screws.

2. Remove the Refrigerator Control Box by pulling it
downward.

3. Disconnect the lead wire on the right position and
separate the lamp sockets.

3-9 MULTI DUCT

1. Remove the upper and
lower Caps by using a flat
screwdriver, and remove 2
screws. (Figure 17)

2. Disconnect the lead wire
on the bottom position.

- 8 -

GRILLE

FAN MOTOR

FAN

BRACKET

MOTOR

Figure 11

GRILLE ASSEMBLY

Figure 12

DEFROST-CONTROL
ASSEMBLY

Figure 13

Figure 14

Figure 15

CONTROL BOX

COVER LAMP

Figure 16

Figure 17

4-1 COMPRESSOR

4-1-1 Role

The compressor intakes low temperature and low pressure
gas from the evaporator of the refrigerator and compresses
this gas to high-temperature and high-pressure gas. It then
delivers the gas to the condenser.

4-1-2 Composition

The compressor includes overload protection. The PTC
starter and OLP (overload protector) are attached to the
outside of the compressor. Since the compressor is
manufactured to tolerances of 1 micron and is hermetically
sealed in a dust and moisture-free environment, use
extreme caution when repairing it.

4-1-3 Note for Usage

(1) Be careful not to allow over-voltage and over-current.
(2) If compressor is dropped or handled carelessly, poor

operation and noise may result.

(3) Use proper electric components appropriate to the

Particular Compressor in your product.

(4) Keep Compressor dry.

If the Compressor gets wet (in the rain or a damp
environment) and rust forms in the pin of the Hermetic
Terminal, poor operation and contact may result.

(5) When replacing the Compressor, be careful that dust,

humidity, and soldering flux don’t contaminate the inside
of the compressor. Contamination in the cylinder may
cause noise, improper operation or even cause it to
lock up.

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 BaTiO

3.

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

value. These features are used as a starting device for
the Motor.

4-2-2 Role of PTC-Starter

(1) The PTC is attached to the Sealed Compressor and is

used for starting the Motor.

(2) The compressor is a single-phase induction motor.

Durign the starting operation, the PTC allows current
flow to both the start winding and main winding.

4-2-3 PTC-Applied Circuit Diagram

● Starting Method for the Motor

4-2-4 Motor Restarting and PTC Cooling

(1) It requires approximately 5 minutes for the pressure to

equalize before the compressor can restart.

(2) The PTC device generates heat during operation.

Therefore, it must be allowed to cool before the
compressor can restart.

4-2-5 Relation of PTC-Starter and OLP

(1) If the compressor attempts to restart before the PTC

device is cooled, the PTC device will allow current to
flow only to the main winding.

(2) The OLP will open because of the over current

condition. This same process will continue (3 to 5
times) when the compressor attempts to restart until
the PTC device has cooled. The correct OLP must be
properly attached to prevent damage to the
compressor.
Parts may appear physically identical but could have
different electrical ratings. Replace parts by part
number and model number. Using an incorrect part
could result in damage to the product, fire, injury, or
possibly death.

4-2-6 Note for Using the PTC-Starter

(1) Be careful not to allow over-voltage and over-current.
(2) Do not drop or handle carelessly.
(3) Keep away from any liquid.

If liquid such as oil or water enters the PTC,
PTC materials may fail due to breakdown of their
insulating capabilities.

(4) If the exterior of the PTC is damaged, the resistance

value may be altered. This can cause damage to the
compressor and result in a no-start or hard-to-start
condition.

(5) Always use the PTC designed for the compressor and

make sure it is properly attached to the compressor.
Parts may appear physically identical but could have
different electrical ratings. Replace parts by part
number and model number. Using an incorrect part
could result in damage to the product, fire, injury, or
possibly death.

4. ADJUSTMENT

- 9 -

PTC STARTER

SEALED
TERMINAL

COMPRESSOR
MOTOR

C

M

S

M

2

5

6

4

S

PTC

N

L1

OVERLOAD PROTECTOR

Resistance Starter Capacitor Running

Figure 18

4-3 OLP (OVERLOAD PROTECTOR)

4-3-1 Definition of OLP

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

Compressor and protects the Motor by opening the
circuit to the Motor if the temperature rises and
activating the bimetal spring in the OLP.

(2) When high current flows to the Compressor motor, the

Bimetal works by heating the heater inside the OLP,
and the OLP protects the Motor by cutting off the
current flowing to the Compressor Motor.

4-3-2 Role of the OLP

(1) The OLP is attached to the Sealed Compressor used

for the Refrigerator. It prevents the Motor Coil from
being started in the Compressor.

(2) For normal operation of the OLP, do not turn the Adjust

Screw of the OLP in any way.

4-4 TO REMOVE THE COVER PTC

(1) Remove the Cover Back M/C.
(2) Disconnect two housing upper side of comp connected

in.

(3) Loosen two screws on comp base.

(4) Use a L-shaped flap tool to pry off the cover.
(5) Assembly in reverse order of disassembly.

- 10 -

Part

Customer part
number

Lot code/
date code

330 FBYY -S1 BOX98

12345678

Physical
termination
part number

Electrical

characteristics

part number

No. Name

Base, phenolic
(UL 94 V-0 rated)
Movable arm support, plated steel
Stationary contact support,
plated steel
Heater support, plated steel
Heater, resistance alloy
Disc, thermostatic alloy
Movable arm, spring temper
copper alloy
Contact, movable, silver on copper
Contact, stationary, silver on copper
Slug, plated steel
Cover, polyester
(UL 94 V -0 rated)
Pin connector, plated copper alloy
(To engage 2.33/2.66 mm dia. pin)

(OVERLOAD PROTECTOR cross section)

Figure 19

1

2 3

5. CIRCUIT DIAGRAM

- 11 -

6. TROUBLESHOOTING

- 12 -

6-1 COMPRESSOR AND ELECTRIC COMPONENTS

1

2

3

4

5

2

5

5

3

5

1

43

YES

NO

YES

The range of resistance is between 1~50Ω(ok)

Open or short

YES

YES

NO

NO

Power Source.

No Voltage.

(Rated Voltage
±10%)?

Replace OLP.

Reconnect.

Reference Page12.

Reference Page12.

Did
compressor
start?

Compressor
is OK

Replace the
compressor

Check connection
condition.

OLP disconnected?

Advise customer that
power supply needs to be
checked by an electrician.

Replace
Compressor.

Supply
voltage rating
with ±10%.

Applied voltage isn't
in acceptable range.
(115V ±10%)

Remove PTC-Starter
from Compressor and
measure voltage
between Terminal C of
Compressor and
Terminal 5 or 6 of PTC.

Check resistance
between M-C, S-C and
M-S in Motor
Compressor.

Check resistance of
two terminals in
PTC-Starter.

Check resistance of two
terminals in OLP.

Check the power supply
under load.
(Compressor attempting
to re-start after being off
for 5 minutes).

Check
resistance of
Motor
Compressor.

Check
resistance of
PTC-Starter.

Check OLP.

Check
starting state.

- 13 -

6-2 PTC AND OLP

65

Shows continuity

Open

Normal operation of
Compressor is
impossible or poor.

Separate PTC-Starter
from Compressor and
measure resistance
between No. 5 and 6
of PTC-Starter with a
Tester.
(Figure 20)

Separate OLP from
Compressor and check
resistance value
between two terminals
of OLP with a Tester.
(Figure 21)

Observation value is
115V/60Hz : 6.8Ω±30%

The resistance value
is 0Ω (short) or
∞ (open).

Check another
electric component.

Replace OLP.

Replace PTC­Starter.

Figure 20

Figure 21

- 14 -

▼ Not cooling at all

▼ Poor cooling performance

Compressor
doesn't run.

Compressor runs
poorly.

Check starting
voltage.

Check for open short or
incorrect resistance readings
in the following components

a. Starting devices
b. OLP

c. Compressor coil
d. Wiring harness

Low voltage.

Short, open, or broken.
Poor contact

or shorted.
Coil open or shorted.

Poor contact
or shorted.

Poor or broken or
open contact.

Shorted.

Lack of capacity.

Replace
indicated component.

Advise customer that
the Power supply
needs to be checked
by an electrician.

Replace
indicated component.

Cause

Check voltage at
starting devices.

Check current flowing
in sub-coil of
Compressor.

Check rating of OLP.

Fan motor
doesn't run.

Heavy frost buildup on
EV APORATOR.

Wire is open or
shorted.

Coil is shorted
or open.

Open.

Open.

Replace
Defrost Heater.

Replace
indicated component.

Replace
indicated component.

Check wiring circuit.

Check Fan Motor.

Check current flow in
the following
components:
Sensor
Fuse-M

Check current flow in
the Defrost Heater.

6-3 OTHER ELECTRICAL COMPONENTS

6-4 SERVICE DIAGNOSIS CHART

- 15 -

COMPLAINT POINTS TO BE CHECKED REMEDY

● Other possible problems:

Check if frost forms in
the freezer.

Check Components
of the defrosting
circuit.

Check the
refrigeration system.

Check the
Thermistor.

Not
defrosting

The system
is faulty.

Perform sealed
system repair.

Replace the
Thermistor.

The operation of
the Thermistor is
incorrect.

No Cooling.

Cools poorly.

Food in the
Refrigerator
is frozen.

Condensation or ice
forms inside
the unit.

Condensation forms
in the Exterior Case.

There is abnormal
noise.

Door does not
close well.

Ice and foods
smell unpleasant.

• Is the power cord unplugged from the outlet?

• Check if the power switch is set to OFF.

• Check if the fuse of the power switch is shorted.

• Measure the voltage of the power outlet.

• Check if the unit is placed too close to the wall.

• Check if the unit is placed too close to the stove,

gas cooker, or in direct sunlight.

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

• Check if food put in the refrigerator is hot.

• Did you open the door of the unit too often

or check if the door is sealed properly?

• Check if the Control is set to Warm position.

• Is food placed in the cooling air outlet?

• Check if the control is set to colder position.

• Is the ambient temperature below 41°F(5°C)?

• Is liquid food sealed?

• Check if food put in the refrigerator is hot.

• Did you open the door of the unit too

often or check if the door is sealed properly?

• Check if the ambient temperature and humidity
of the surrounding air are high.

• Is there a gap in the door gasket?

• Is the unit positioned in a firm and even place?

• Are any unnecessary objects placed

in the back side of the unit?

• Check if the Drip Tray is not firmly fixed.

• Check if the cover of the compressor enclosure

in the lower front side is taken out.

• Check if the door gasket is dirty with
an item like juice.

• Is the refrigerator level?

• Is there too much food in the refrigerator?

• Check if the inside of the unit is dirty.

• Are foods with a strong odor unwrapped?

• The unit smells of plastic.

• Plug into the outlet.

• Set the switch to ON.

• Replace the fuse.

• If the voltage is low, correct the wiring.

• Place the unit about 4 inches (10 cm) from the wall.

• Place the unit away from these heat sources.

• Lower the ambient temperature.

• Put in foods after they have cooled down.

• Don't open the door too often and close

it firmly.

• Set the control to Recommended position.

• Place foods in the high-temperature section.

(front part)

• Set the control to Recommended position.

• Set the control to Warm position.

• Seal liquid foods with wrap.

• Put in foods after they have cooled down.

• Don't open the door too often and close

it firmly.

• Wipe moisture with a dry cloth. It will disappear
in low temperature and humidity.

• Fill up the gap.

• Adjust the Leveling Screw, and position the

refrigerator in a firm place.

• Remove the objects.

• Fix the Drip Tray firmly in the original position.

• Place the cover in its original position.

• Clean the door gasket.

• Position in a firm place and level the

Leveling Screw.

• Make sure food stored in shelves does not prevent
the door from closing.

• Clean the inside of the unit.

• Wrap foods that have a strong odor.

• New products smell of plastic, but this

will go away after 1-2 weeks.

6-5 REFRIGERATION CYCLE

- 16 -

▼ Troubleshooting Chart

PARTIAL Freezer Low flowing sound of A little higher • Refrigerant level is low due
LEAKAGE compartment and Refrigerant is heard and than ambient • to a leak.

Refrigerator don't frost forms in inlet only. temperature. • Normal cooling is possible by
cool normally. • restoring the normal amount of

• refrigerant and repairing the leak.

COMPLETE Freezer Flowing sound of refrigerant Equal to ambient • No discharging of Refrigerant.
LEAKAGE compartment and is not heard and frost isn't temperature. • Normal cooling is possible by

Refrigerator don't formed. • restoring the normal amount of
cool normally. • refrigerant and repairing the leak.

PARTIAL Freezer Flowing sound of refrigerant A little higher • Normal discharging of the
CLOG compartment and is heard and frost forms than ambient • refrigerant.

Refrigerator don't in inlet only. temperature. • The capillary tube is faulty.
cool normally.

WHOLE

Freezer

Flowing sound of refrigerant Equal to ambient • Normal discharging of the

CLOG

compartment and

is not heard and frost isn't temperature. • Refrigerant.

Refrigerator don't cool.

formed.

MOISTURE Cooling operation Flowing sound of refrigerant Lower than • Cooling operation restarts
CLOG stops periodically. is not heard and frost melts. ambient • when heating the inlet of the

temperature. • capillary tube.

COMP- Freezer and Low flowing sound of A little higher • Low pressure at high side
RESSION Refrigerator refrigerant is heard and than ambient • of compressor due to low

don't cool. frost forms in inlet only. temperature. • refrigerant level.

NO COMP- No compressing Flowing sound of refrigerant Equal to ambient • No pressure in the high
RESSION operation. is not heard and there is temperature. • pressure part of the

no frost. • compressor.

CAUSE

TEMPERATURE

OF THE

COMPRESSOR

REMARKS

STATE OF

THE UNIT

STATE OF THE

EVAPORATOR

LEAKAGE

CLOGGED BY DUST

DEFECTIVE

COMPRESSION

6-5-1 SEALED SYSTEM DIAGNOSIS

- 17 -

“Not Cooling” Complaint

All components operating, No airflow problems, Not frosted up as a defrost problem

problem has been isolated to sealed system area

Frost

Pattern?

Equalization

Test

Partial

Very Fast

Inefficient

Compressor

Partial

Restriction

Complete

Restriction

Equalization

Test

Condenser

Temperature

None

Very Fast

Very SlowVery Slow

Hotter than Normal

Air/Low Side

Leak

Loss of Change

Compressor Not

Pumping

Cap Tube

Sound

Room Temperature

Trace of Oil

Undercharge

Leak

Yes

No

Faint

Fast

None to Weak

(The equalization test is trying to restart a compressor using a start kit after it has been operating.)

7-1 OPERATION PRINCIPLE

7-1-1 Operation Principle of IceMaker

7. OPERATION PRINCIPLE AND REPAIR METHOD OF ICEMAKER

- 18 -

1. Turning the Icemaker stop switch off (O) stops the ice making function.

2. Setting the Icemaker switch to OFF and then turning it back on will reset the icemaker control.

• Adjusts EJECTOR to Start Position with power on.

Power On

Start Position

Ice Making

Mode

Harvest

Mode

Park Position

Fill

Test Mode

• Waits until water becomes cold after starting the
ice making operation.

• Runs MOTOR to drop ice from the tray into the ICE BIN.

• Performs Ice Making Mode after supplying water by operating

the SOLENOID in ICE VALVE.

• To operate LINE and SERVICE, press and hold the Fill Key
for 3 seconds. The ice maker will run through 3 stages:
Harvest Fill Icemaking.

• With the detect lever, checks if the ICE BIN is full.

Power (On/ Off) Switch

Fill Key

7-2 ICE MAKER FUNCTIONS

7-2-1 Start Position

1. After POWER OFF or Power Outage, check the EJECTOR's position with MICOM initialization to restart.

2. How to check if it is in place:

- Check HIGH/LOW signals from HALL SENSOR in MICOM PIN.

3. Control Method to check if it is in place:
(1) EJECTOR is in place,

- It is an initialized control, so the mode can be changed to ice making control.

(2) EJECTOR isn't in place:

A. If EJECTOR is back in place within 2 minutes with the motor on, it is being initialized. If not, go to Step B.
B. If EJECTOR is back in place within 18 minutes after the heater turns from ON to OFF, it is being initialized. If not, it is

not functioning. Repeat Step B with Heater and Motor off.

7-2-2 Ice Making Mode

1. Ice Making refers to the freezing of supplied water in the ice trays. Complete freezing is assured by measuring the
temperature of the Tray with Ice-Making SENSOR.

2. Ice Making starts after completion of the water fill operation.

3. The Ice Making function is completed when the sensor reaches 19°F(-7°C), 60 to 240 minutes after starting.

4. If the temperature sensor is defective, the ice-making function will be completed in 4 hours.

NOTE : After Icemaker Power is ON, the Icemaker heater will be on for test for 9 sec.

7-2-3 Harvest Mode

1. Harvest (Ice removing) refers to the operation of dropping cubes into the ice bin from the tray when ice-making has
completed.

2. Harvest mode:
(1) The Heater is ON for 30 seconds, then the motor starts.
(2) After performing Step 1 (the Heater is turned OFF), the Ejector will be back in place wthin 18 minutes. (Hall SENSOR

sign = OV). Ice removal is then complete. Then the Ice Maker cycles to the Fill Mode. The water supply fails to start, it
is not functioning. Put the Heater and Motor in the off position. Restart every 2 hours. (Refer to fig.1)

NOTE : If the motor malfunctions and starts before the detect lever rises, MICOM regards the Ice-Removing phase as
completed. Water then starts flowing. To prevent this, MICOM doesn’t switch to water-supply mode, but restarts the ice­removing mode. If this happens 3 times, the motor is malfunctioning and you should stop the loads (Heater, Motor). Then
restart the Ice-Removing mode every 2 hours. (See Step 2 above.)

- 19 -

Heater

on
off

on

0V

5V

off

30 sec.

10 sec.

Motor

Hall IC

Ice removing
completion point

2 ms

Ice making sensor temperature is 50°F(10˚C)
or more
Max. 18 minutes
After detect LEVER rises

<fig1. Harvest mode Process>

7-2-4 Fill / Park Position

1. Once a normal harvest mode has been completed, the water solenoid will be activated.

2. The amount of water is adjusted by pressing the Fill Key repeatedly. This changes the time allowed for fill as illustrated in
the table below.

<Water supply amount TABLE>

- 20 -

ST AGE TIME TO SUPPLY INDICA TIONS REMARKS

1

2

3

4

5

6 sec.

6.5 sec.

7 sec.

7.5 sec.

8 sec.

The water amount will vary depending
on the water control Switch setting, as
well as the water pressure of the
connected water line.

7-2-5 Function TEST

1. This is a compulsory operation for TEST, SVC, cleaning, etc. It is operated by pressing and holding the Fill Key for 3 seconds.

2. The test works only in the Ice Making Mode. It cannot be entered from the Harvest or Fill mode. (If there is an ERROR, it
can only be checked in the TEST mode.)

3. Caution! If the test is performed before water in the Maker is frozen, the Ejector will pass through the water. When the Fill
mode begins (Stage 4), unless the water supply has been shut off, added water will overflow into the ice bin. If the control
doesn’t operate normally in the TEST mode, check and repair as needed.

4. After water is supplied, the normal CYCLE is followed: ice making → Harvest → Fill → Park Position.

5. Five seconds after Stage 5 is completed, the Ice Maker returns to MICOM control. The time needed to supply water
resets to the pre- test setting.

<Diagnosis TABLE>

7-3 DEFECT DIAGNOSIS FUNCTION

7-3-1 ERROR CODES shown on Ice Maker water supply control panel

ERROR indicators in table can be checked only in TEST mode.

- 21 -

STAGE ITEMS INDICATOR REMARKS

1

2

3

4

5

6

HEATER

MOTOR

HALL IC I

(detection of

position)

VALVE

HALL IC II

(detection of full-

filled Ice)

Reset

Five seconds after heater starts, heater will
go off if temperature recorded by sensor is
10°C or lever is in up position.

Five seconds after heater starts, you can
confirm that motor is moving.

You can confirm Hall Ic detection of position.

Two seconds after detection of initial
position, you can confirm that valve is on.

You can check whether hall is sensing Full
ice condition. (If there is a full-filled error, the
fifth LED is not on.)

Five seconds after fifth stage is completed,
the icemaker resets to initial status.

Return to Status prior to
TEST MODE

NO DIVISION INDICATOR CONTENTS REMARKS

1

2

3

Normal

Ice-Making

Sensor

malfunction

Ice Maker Kit

malfunction

Mark time to

supply

None

Open or short-circuited wire

When ejector blades don’t reach

park position over 18 minutes after

Harvest Mode starts.

Display switch

operates properly

Make sure that the wire

on each sensor is

connected.

Check

HALL IC/MOTOR/

HEATER/RELAY

8-1 FUNCTION

8-1-1 Function

1. When the appliance is plugged in, it is set to 37°F for Refrigerator and 0°F for freezer.
You can adjust the Refrigerator and the Freezer control temperature by pressing the ADJUST button.

2. When the power is initially applied or restored after a power failure, it is automatically set to “37” & “0”.

8-1-2 How to Toggle the Display between °F & °C

1. The display temperature mode can be changed from °F to °C or °C to °F by pressing and holding the FRZ TEMP and the
REF TEMP keys at the same time for over one second.

2. The initial setting is °F. Whenever the mode is changed, the LED lights are changed.

8-1-3 Lock function (dispenser and display button lock)

1. When the refrigerator is first turned on, the buttons are not locked. The display panel shows the padlock

unlocked icon.

2. To lock the display, the dispenser, and the control panel, press

and hold the LOCK button for 3 seconds. The locked padlock
icon is displayed with the word "LOCK" printed beside it.

3. The LOCK button is the only control feature that remains active

in the locked state. The buzzer sound, other control buttons,
and the dispenser are deactivated.

4. To release from the locked state, press and hold the LOCK

button again for 3 seconds.

8-1-4 Filter condition display function

1. There is a replacement indicator light for the water

filter cartridge on the dispenser.

2. Water filter needs replacement once six months or

about 28,000 seconds of using water filter.

3. Water filter light and “FILTER RESET HOLD 3 SECS”

text turn on to tell you need to replace the filter soon.

4. After replace the filter, press and hold the lock button

more than 3 seconds.
Then water filter light and “FILTER RESET HOLD 3
SECS” text turn off with reset status.

8-1-5 Express freezing selection

Please select this function for quick freezing.

• Function is repeated following below whenever pressing Express FRZ button.

• Expressing freezer function automatically turns off after a fixed time passes.

8. DESCRIPTION OF FUNCTION & CIRCUIT OF MICOM

- 22 -

LOCK CONTROL

Ex) In selecting

"LOCK"

Ex) In selecting

"LOCK" again

DISPENSER & BUTTON

LOCK

DISPENSER & BUTTON

In initial Power On

/ Filter RESET

Replace indicator

light on

Classification

Filter Status

Display

FILTER RESET

HOLD 3SECS

EXPRESS FRZ

8-1-6 CONTROL OF FREEZER FAN MOTOR

1. Freezer fan motor has high and standard speeds.

2. High speed is used at power-up, for express freezing, and when refrigerator is overloaded.
Standard speeds is used for general purposes.

3. To improve cooling speed, the RPM of the freezer fan motor change from normal speed to high.

4. High speed (2700RPM) : Initial power on or load corresponding operation, express freezing.
Normal speed (2400RPM) : General working conditions.

5. Fan motor stops when refrigerator or freezer door opens.

8-1-7 EXPRESS FREEZING

1. The purpose of this function is to intensify the cooling speed of freezer and to increase the amount of ice.

2. Whenever selection switch is pressed, selection/release, the LED will turn ON or OFF.

3. If there is a power outage and the refrigerator is powered on again, EXPRESS FREEZING will be canceled.

4. To activate this function, press the Express Freezing key and the LED will turn ON. This function will remain activated for
24 hrs. The first three hours the compressor and Freezer Fan will be ON. The next 21 hours the freezer will be controlled
at the lowest temperature. After 24 hours or if the Express Freezing key is pressed again, the freezer will return to its
previous temperature.

5. During the first 3 hours:
(1) Compressor and freezer fan (HIGH RPM) run continuously .
(2) If a defrost cycle begins during the first 90 minutes of Express Freezing, the Express Freeze cycle will complete its

cycle after defrosting has ended.
If the defrost cycle begins when Express Freeze has run for more than 90 minutes, Express Freeze will run for two
hours after the defrost is completed.

(3) If EXPRESS FREEZING is pressed during defrost, EXPRESS FREEZING LED is on but this function will start seven

minutes after defrost is completed and it shall operate for three hours.

(4) If EXPRESS FREEZING is selected within seven minutes after compressor has stopped, the compressor (compressor

delays seven minutes) shall start after the balance of the delay time.

(5) The fan motor in the freezer compartment runs at high speed during EXPRESS FREEZING .

6. For the rest of the 21 hours, the freezer will be controlled at the lowest temperature.

8-1-8 REFRIGERATOR LAMP AUTO OFF

1. To avoid heat damage caused by the lamp, it is turned off automatically when the refrigerator door is open for more than 7
minutes.

8-1-9 Alarm for Open Door

1. This feature sounds a buzzer when the freezer or refrigerator door is not closed within 1 minute after it is opened.

2. One minute after the door is opened, the buzzer sounds three times each for 1/2 seconds. These tones repeat every 30
seconds.

3. The alarm is cancelled when the freezer or the refrigerator is closed while the buzzer sounds.

- 23 -

Closed Open Closed Open

3 Times 3 Times 3 Times 3 Times

Closed

Within 1 min. 1 min.

30 sec 30 sec 30 sec

Freezer Door

or Refrigerator

Door

Buzzer

8-1-10 Buzzer Sound

When the button on the front Display is pushed, a Ding~ Dong~ sound is produced.
(Refer to the Buzzer Circuit 8-2-4 No. 3)

8-1-11 Defrosting (removing frost)

1. Defrosting starts each time the COMPRESSOR running time reaches 7 hours.

2. For initial power on or for restoring power, defrosting starts when the compressor running time reaches 4 hours.

3. Defrosting stops if the sensor temperature reaches 46.4°F(8°C) or more. If the sensor doesn’t reach 46.4°F(8°C) in
2 hours, the defrost mode is malfunctioning. (Refer to the defect diagnosis function, 8-1-14.)

4. Defrosting won’t function if its sensor is defective (wires are cut or short circuited)

8-1-12 Filter Replacement Indication

1. In 6 months after the UNIT (refrigerator) is power on, or after 28,000 seconds of dispenser use, the water filter Indicator
LED will be ON.

2. When the water filter indicator LED is illuminated, you should change the water filter. After this, you must press the water
filter button for three seconds and you will hear a ding-dong sound.
The LED will be OFF. This operation will indicate that the UNIT is reset to its initial conditions, so this process is restarted.

8-1-13 Electrical Parts Are Turned On Sequentially

Electrical parts such as COMP, defrosting heater, freezer FAN, etc. are turned on in the following order to prevent noise and
parts damage. Several parts are started at the same time at initial power on and are turned off together when TEST is
completed.

8-1-14 How to show the display ON & OFF

The display can be changed from on to off mode or off to on mode by pressing and holding the EXPRESS FRZ and FRZ
TEMP buttons at the same time for over five seconds.

- 24 -

OPERATING ORDERS

Temperature of Defrosting
Sensor is 113°F(45°C) or
more (when unit is newly
purchased or when moved)

Temperature of defrosting
sensor is lower than
113°F(45°C)
(when power cuts, SERVICE)

Reset to normal operation
from TEST MODE

Initial power on

POWER

ON

in 1/2 second in 1/2 second

Total load

OFF

COMP

ON

Freezer FAN

ON

in 7 minute

in 1/2 second

COMP

ON

Freezer FAN

ON

POWER

ON

COMP

ON

Freezer FAN

ON

Defrosting

heater ON

Defrosting

heater OFF

in 1/2 second

in 1/2 second in 1/2 second

in 10 second

8-1-15 Defect Diagnosis Function

1. Automatic diagnosis makes servicing the refrigerator easy.

2. When a defect occurs, the buttons will not operate; but the tones. such as ding. will sound.

3. When the defect CODE removes the sign, it returns to normal operation (RESET).

4. The defect CODE shows on the Refrigerator and Freezer Display.

ERROR CODE on display panel

Note 1) Freezer room notch temperature display and refrigerator room notch temperature display (Failure code

indication part) are normally indicated in abnormal ambient sensor, and “Er” indicated on the amvient
temperature display.

✽ LED check function: If simultaneously pressing express freezer button and freezing temperature adjustment

button for a second, display LED graphics on. If releasing the button, the LED graphic
displays the previous status.

- 25 -

NO ITEM

ERROR CODE

CONTENTS REMARKS



1

2

3

4

5

6

Failure of freezer
sensor

Failure of
Refrigerator sensor

Failure of defrost
sensor

Failure of Room
Temperature
sensor

Failure of defrost
mode

Failure of BLDC
Fan Motor at
Freezing
Compartment.

When Display check mode

Cut or short circuit wire

Cut or short circuit wire

Cut or short circuit wire

Cut or short circuit wire

When defrost sensor

doesn’t reach 46°F within 2

hours after starting defrost.

If there is no fan motor

signal for more than 65sec

in operation fan motor

Inspect Connecting wires

on each sensor

Snapping of defrost heater

or Temperature fuse, pull-

out of connector (indicated

minimum 2 hours after

failure occurs)

Poor motor, hooking to

wires of fan, contact of

structures to fan, snapping

or short circuit of Lead wires

Er

Er

Er

Er

Er

FS

rS

dS

dH

FF

8-1-16 TEST Mode

1. The Test mode allows checking the PCB and the function of the product as well as finding out the defective part in case of
an error.

2. The test mode is operated by pressing two buttons at Display panel.

3. While in the test mode, the function control button is not recognized, but the recognition tone (beep~) sounds.

4. After exiting the test mode, be sure to reset by unplugging and then plugging in the appliance.

5. If an error, such as a sensor failure, is detected while in the test mode, the test mode is cleared and the error code is
displayed.

6. While an error code is displayed, the test mode will not be activated.

* Freezer Fan RPM Variable Check:

In case the freezer fan is in operation when the express freezer button and freezing temp. button. Control are pressed for
more than one second at the same time freezer fan RPM changes. (for example if high speed, to normal speed or if
normal speed, to high speed for 30 seconds)
After 30 seconds, it turns to its original RPM.

* Demonstration MODE:

1. When the express freeze button and the refrigerator temperature control button are pushed at the same time and hold
for 5 seconds or longer, it converts to demonstration mode.

2. The Display shows the Demo graphic.

3. In this status, all Loads are off (Compressor / Fan / Damper / Heater)
(Even is Demonstration Mode, the refrigerator Lamp automatic off function warks normally and can be demonstrated)

4. Exit the Demo mode and reset the Display by pressing the Freezer Temp. Control button and the Refrigerator Temp.
Control button for 3 seconds or longer.

- 26 -

MODE MANIPULATION CONTENTS REMARKS

TEST1

TEST2

TEST3

Reset

Push Express Freezing
Key and LOCK KEY at the
same time for 3 seconds
OR Push TEST S/W(on
the main Board) once.

Push Express Freezing
Key and LOCK KEY at the
same time for 3 seconds
in TEST MODE 1 OR
Push TEST S/W once in
TEST MODE 1

Push Express Freezing
Key and LOCK KEY at the
same time for 3 seconds
in TEST MODE 2 OR
Push TEST S/W once in
TEST MODE 2

Push Express Freezing
Key and LOCK KEY at the
same time for 3 seconds
in TEST MODE 3 OR
Push TEST S/W once in
TEST MODE 3

1) Continuous operation of the
COMPRESSOR and the Freezer fan

2) Stepping DAMPER OPEN

3) Defrosting HEATER OFF

4) DISPLAY LED all ON

1) Continuous operation of the
COMPRESSOR and the Freezer fan

2) Stepping DAMPER CLOSE

3) Defrosting HEATER OFF

4) DISPLAY LED shows no. 2

1) COMPRESSOR and the Freezer fan
OFF

2) Stepping DAMPER CLOSE

3) Defrosting HEATER ON

4) DISPLAY LED shows no. 3

Reset to the previously setting
Before TEST MODE.

Reset if the
Temperature of the
Defrosting Sensor is
46°F(8°C) or more.

The compressor will
Start after a 7-minute
Delay.

8-2 PCB FUNCTION

8-2-1 Power Circuit

1. Power is supplied to the control board at pin7 and 9 od connector #1.

- 27 -

8-2-2 Load / Buzzer Drive & Open Door Detection Circuit

1. Load Drive Condition Check

To measure outputs of the control board, check voltages between the pins for the following components:

NOTE: When the door of the freezer/refrigerator is left open for 7 minutes or longer, the lamp of the
freezer’refrigerator turns.

2. Fan motor driving circuit (freezing compartment fan)

- 28 -

Pin1 & 2 of con4

MOTOR OFF 2V or less

MOTOR ON 13V~15V

Circuit Pin Number Pin Number Output Voltage

Compressor Con2 pin11 Con1 pin1 115 VAC

Condenser fan Con2 pin11 Con1 pin1 115 VAC

Defrost heater Con2 pin9 Con1 pin1 115 VAC

F,R-lamp Con2 pin,3.5 Con1 pin1 115 VAC
Water valve Con2 pin7 Con1 pin1 115 VAC
Dew heater Con2 pin3 Con1 pin1 115 VAC
Water valve Con2 pin1 Con1 pin1 115 VAC

3. Open Door Detection Circuit Check

8-2-3 Temperature Sensor Circuit

• The resistance of the SENSOR has a ±5% common difference.

• Measure the resistance of the SENSOR after leaving it for over 3 minutes in the measuring temperature.

This delay is necessary due to sensor response speed.

- 29 -

Closed 0 V

Open 5 V

Freezer/
Refrigerator Door

Measurement

Location

Pin 4 & 5 of con4 Ref.Door
Pin 5 & 6 of con5 Fre.Door

TEMPERATURE

RESISTANCE OF FREEZER

RESISTANCE OF REFRIGERATOR &

SENSOR

DEFROST SENSOR & ROOM SENSOR

- 20 ˚C (-4 °F) 22.3 KΩ 77 KΩ

- 15 ˚C (5 °F) 16.9 KΩ 60 KΩ

- 10 ˚C (14 °F) 13.0 KΩ 47.3 KΩ

- 5 ˚C (23 °F) 10.1 KΩ 38.4 KΩ
0 ˚C (32 °F) 7.8 KΩ 30 KΩ

+ 5 ˚C (41 °F) 6.2 KΩ 24.1 KΩ
+ 10 ˚C (50 °F) 4.9 KΩ 19.5 KΩ
+ 15 ˚C (59 °F) 3.9 KΩ 15.9 KΩ
+ 20 ˚C (68 °F) 3.1 KΩ 13 KΩ
+ 25 ˚C (77 °F) 2.5 KΩ 11 KΩ
+ 30 ˚C (86 °F) 2.0 KΩ 8.9 KΩ

+ 40 ˚C (104 °F) 1.4 KΩ 6.2 KΩ
+ 50 ˚C (122 °F) 0.8 KΩ 4.3 KΩ

8-2-4 Refrigeration Compartment Stepping Motor Damper Circuit

A reversible DC motor is used to open and close the damper.
To open the damper, push test button once.
To close the damper, push test button twice.

- 30 -

8-3 TROUBLESHOOTING

- 31 -

PROBLEM INDICATED BY CHECK CHECKING METHOD CAUSE SOLUTION

POWER
SOURCE is
poor.

COOLING is
poor.

1. The whole
DISPLAY
LED/SEVEN
SEGMENT
DISPLAY is of f.

2. DISPLAY LED/
SEVEN
SEGMENT
DISPLAY
operates
abnormally

NO COOLING.

FREEZER
TEMPERATURE
is incorrect

1. FREEZER/
REFRIGERAT OR.

2. If LAMP is dim.

3. The connection of the
MAIN PWB
CONNECTOR.

1. If the COMPRESSOR
operate.

2. If refrigerant is leaking.

1. If FAN MOTOR
operates.

2. If DEFROSTING is
normal.

3. If SENSOR is normal.

4. Door Line contact.

Check if
FREEZER/REFRIGERA
TOR DOOR IS OPEN
and check display .

Check visually.

Check connection of
CONNECTOR.

USE TEST MODE1
(forced COOLING).
If less than 7 minutes
pass after compressor
shuts off, don’t press the
KEY and wait.

Measure the amount of
frost sticking on
EV APORA TOR and the
surface temperature of
the condenser pipe.

USE TEST MODE1
(forced COOLING).

Check the amount of frost
sticking on the
EV APORA TOR .

of the Refrigerator
SENSOR.

Check the seal when the
door is closed.

POWER SOURCE is
poor.

Applied voltage error.

CONNECTOR
connection is poor.

TRANS FUSE is open.

COMPRESSOR locked
or blocked.

OLP , PTC is poor .
COMPRESSOR RELA Y
is poor.

THE CONNECTING
WIRE is poor.

Refrigerant leakage.

FAN MOTOR is poor .

CONNECTING WIRE is
poor.

DEFROSTING is poor.

SENSOR RESIST ANCE
is poor.

Door liner damaged.

Use boosting TRANS.

Reconnect
CONNECTOR.

Replace TRANS.

Replace
COMPRESSOR.

Replace OLP , PTC.

Replace MAIN PWB.

Check the connection of
the black wire of the
MAIN PWB
CONNECTOR (CON2).

Replace the leaking part
and replace any lost
refrigerant.

Replace the FAN
MOTOR.

Certify the MOTOR and
the connection of the
black wire of the MAIN
PWB CONNECTOR
(CON2).

See DEFROSTING is
poor.

Replace SENSOR.

Replace door liner.

- 32 -

PROBLEM INDICATED BY CHECK CHECKING METHOD CAUSE SOLUTION

COOLING is
poor.

DEFROSTIN
G is poor.

If
REFRIGERA TOR
TEMPERATURE
is too low.

NO
DEFROSTING.

1. If FREEZER
TEMPERATURE is
normal.

2. If amount of cool air
from FAN MOTOR is
sufficient.

3. Door Line contact.

1. If HEATER emits heat.

2. If DRAIN PIPE is
blocked.

3. If ice remains after
DEFROSTING.

Check is FREEZER
TEMPERATURE is too
low.

Make sure that the
amount and speed of cool
air are sufficient by
touching the check
supplied on the
REFRIGERA TOR.

Check door seal when
door is closed.

USE TEST MODE3
(forced DEFROSTING).

Check DRAIN PIPE.

Make sure that
DEFROST SENSOR is
connected.

Make sure that
FREEZER
/REFRIGERA TOR
DOOR is closed.

FAN MOTOR is poor .

Passage of cool air is
blocked.

EV A frozen.

Door liner damaged.

HEATER disconnection.

TEMPERATURE FUSE
disconnection.

Connection is poor.

DEFROST-SENSOR is
poor.

HEATER RELAY is poor.

DRAIN PIPE is blocked.

Connection is poor.

DOOR does not close
properly .

Make sure the DOOR
isattached.

Replace FAN MOTOR.

Remove impurities.

See DEFROSTING is
poor.

Replace Door liner.

Replace HEATER.

Replace
TEMPERATURE FUSE.

Check EVAPORATOR
connection and wire of
MAIN PWB
CONNECTOR.

Replace DEFROST­SENSOR.

Replace RY3 of MAIN
PWB.

Remove ice and
impurities.

Check HEATER PLATE
resistance.

Reassemble the
DEFROST-SENSOR.

Reassemble DOOR.

Replace GASKET .

8-4 MAIN PWB ASSEMBLY AND PARTS LIST

8-4-1 Main PWB Assembly

- 33 -

Connector4

Connector1

Connector3 Connector2

Connector6 Connector5

CASE PARTS

CAUTION: Use the part number to order part, not the position number.

- 34 -

9. EXPLODED VIEW & REPLACEMENT PARTS LIST

313B

406C

106A

315A

313A

501A

411A

501F

303C

318A

303B

314A

300A

312A

317A

103A

105A

283B

283B

328A

103B

315B

315B

315C

315C

323B

329C

420A

319A

319C

503D

262B

410A

409D

624C

624A

409B

158A

405F

404A

405C

332A

135D

405A

158B

145B

409B

106A

120B

145A

406D

249D

249C

610A

610A

406A

282F

405B

329A

262H

103C

135C

410G

406B

624D

624B

304A

207B

207A

271C

271B

271A

271B

402A

402A

400A

301A

408A

610B

610B

610C

#EV#

FREEZER PARTS

CAUTION: Use the part number to order part, not the position number.

- 35 -

145C

136A

136B

237C

248F

145F

177B

131A

#EV#

REFRIGERATOR PARTS

CAUTION: Use the part number to order part, not the position number.

*

: on some models

- 36 -

141B

141C

141A

141B

141C

141A

146A

161E

*

141B

141C

141A

141B

141C

141A

147C

147B

147A

167B

154A

161A

*

145E

161C

*

160B

161A

*

161D

*

151A

248H

162B

145D

160B

162A

160C

155J

146B

151C

161F

*

210A

248A

*

141D

#EV#

DOOR PARTS

233A233D

231A

233B 233C

231B

241C

237A

241C

241C

230B

241A

241B

241C

237A

241C

205C

205B

205A

*

212D

*

244E

*

244E

*

212G

230A

312B

212E

*

244D

*

244D

*

281C

281F

281E

281E

281F

243A

243B

243A

243B

203A

201A

200A

262C

262C

▲

▲

619B

603D

603C

616J

615A

249G

249E

249A

249H

249F

249B

#EV#

CAUTION: Use the part number to order part, not the position number.

: on some models

*

▲ only for the service

- 37 -

DISPENSER PARTS

CAUTION: Use the part number to order part, not the position number.

- 38 -

280D

279B

280F

279C

279E

406E

113C

279D

276B

276A

616B

616A

403A

#EV#

ICE & MAKER PARTS

CAUTION: Use the part number to order part, not the position number.

- 39 -

602A

600A

616F

623B

616G

616H

625A

619A

627A

616E

623A

627B

616C

616D

603B

623B

616G

616H

603A

617A

616F

#EV#

P/No. 3828JL8066B FEB., 2005 Printed in Korea