Samsung RFG238AARS, RFG238AAWP, RFG237AABP, RFG237AARS,RFG238AARS,RFG237AABP,RFG238AABP,RFG237AAWP,RFG238AAWP,RFG237AAPN,RFG238AAPN, RFG238AABP Service Manual

BOTTOM MOUNT FREEZER

BASIC : RFG237AA / RFG238AA

MODEL NAME : RFG237AARS RFG238AARS

RFG237AABP RFG238AABP
RFG237AAWP RFG238AAWP
RFG237AAPN RFG238AAPN

REFRIGERATOR

REFRIGERATOR CONTENTS

1. PRECAUTIONS(SAFETY WARNINGS)··4

2. PRODUCT SPECIFICATIONS

··········

8

3. DISASSEMBLY AND REASSEMBLY··26

4. TROUBLESHOOTING

················

52

5. EXPLODED VIEW & PARTS LIST

····

97

6. PCB DIAGRAM

····················

120

7. WIRING DIAGRAM

··················

126

8. SCHEMATIC DIAGRAM

············

127

For the latest parts information, Please access to our service web site
(● North America : http://service.samsungportal.com)

RFG238AA

MODEL CODE :

RFG237AARS/XAA RFG238AARS/XAA
RFG237AABP/XAA RFG238AABP/XAA
RFG237AAWP/XAA RFG238AAWP/XAA
RFG237AAPN/XAA RFG238AAPN/XAA

IMPORTANT SAFETY NOTICE

The service guide is for service men with adequate backgrounds of
electrical, electronic, and mechanical experience. Any attempt to repair
a major appliance may result in personal injury and property damage.
The manufacturer or dealer cannot be responsible for the interpretation
of this information.

SAMSUNG ELECTRONICS AMERICA, INC.

Technical Service Guide

Copyright ⓒ2008

All rights reserved. This service guide may not be reproduced in whole or in
part in any form without written permission from the SAMSUNG ELECTRONICS
Company.

WARNING

Contents

1. Precautions(Safety Warnings) ·····································4

2. Product Specifications ········································8
2-1) Introduction of main function ···································9
2-2) Specifications ·········································11
2-3) Interior Views ·········································12
2-4) Model Specification ·······································13
2-5) Model Specification &Specification Chart ·····························14
2-6) Dimensions of Refrigerator (Inches)································17
2-7) Optional Material Specification ··································18
2-8) Refrigerant Route in Refrigeration cycle ······························19
2-9) Cooling Air Circulation ·····································25

3. Disassembly and Reassembly ····································26
3-1) PRECAUTION ·········································27
3-2) Refrigerator Door········································28
3-3) Door Handle Freezer ······································30
3-4) Refrigerator Light········································31
3-5) Cover-display & water-dispenser ·································31
3-6) Water-dispenser ········································32
3-7) Glass Shelf ··········································33
3-8) Foldable Glass Shelf ······································33
3-9) Vegetable & Fruit Drawers Shelf ·································34
3-10) Cool Select Pantry·······································35
3-11) Water Tank··········································36
3-12) Motor Damper ········································38
3-13) Water Filter (Disassembly) ···································38
3-14) Water Filter (Reassembly) ···································39
3-15) Gallon Door Bin ········································39
3-16) Vertical Hinged Section ····································40
3-17) Evaporator Cover In Refrigerator ································41
3-18) Evaporator In Refrigerator ···································42
3-19) Super Extended Drawer ····································43
3-20) Freezer Door ·········································44
3-21) Ice-Maker ··········································45
3-22) Freezer Light ·········································46
3-23) Door Switch In Freezer·····································46
3-24) Evaporator Cover In Freezer ··································47
3-25) Evaporator In Freezer ·····································47
3-26) Machine Compartment ·····································48
3-27) Electric Box··········································51

4. TROUBLESHOOTING ········································52
4-1) Function for failure diagnosis···································53

4-1-1. Test mode (manual operation / manual defrost function) ····················53
4-1-2. Display function of Communication error ···························54
4-1-3. Self-diagnostic function ··································55
4-1-4. Display function of Load condition ·····························58
4-1-5. Exhibition mode setting function ······························59
4-1-6. Option setting function ··································60
4-1-7. Option TABLE ······································62

4-2) Diagnostic method according to the trouble symptom(Flow Chart)···················64

4-2-1. If the trouble is detected by self-diagnosis ··························65
4-2-2. If FAN does not operate ··································76
4-2-3. If ICE Room Fan does not operate ·····························77
4-2-4. If Ice Maker does not operate ·······························78
4-2-5. If ICE MAKER(F) does not operate (RFG238 MODEL) ····················79

Contents

4-2-6. If defrost does not operate (F,R DEF Heater) ·························80
4-2-7. If Power is not supplied ··································81
4-2-8. If compressor does not operate·······························82
4-2-9. When alarm sound continuous without stop(related with buzzer sound) ·············84
4-2-10. If Panel PCB does not work normally····························86
4-2-11. If Pantry Panel PCB is not working normally·························87
4-2-12. When refrigerator ROOM Lamp does not light up ······················88
4-2-13. If ICE Water is not supplied ································90
4-2-14. If Cubed or Crushed Ice is not supplied···························92
4-2-15. If Cover Ice Route Moor(Geard Motor) is not working normally·················93
4-2-16. If Inverter PCB Power is not supplied····························94
4-2-17. LED blinking frequency depending on protecting functions ··················95

Inverter pcb circuit diagram ·····································96

5. Exploded View & PARTS LIST ····································97
5-1) Freezer············································98
5-2) Refrigerator··········································102
5-3) Cabinet ···········································108
5-4) Disassembly of Freeze Door ··································112
5-5) Disassembly of Refrigerator DoorLeft ······························114
5-6) Disassembly of Refrigerator Door Right ·····························118

6. PCB DIAGRAM ··········································120
6-1) PCB Layout with part position ·································121
6-2) PCB Layout with part position (SMPS Board) ···························122
6-3) Connector Layout with part position (Main Board) ·························123
6-4) Connector Layout with part position (SMPS Board) ························125

7. WIRING DIAGRAM·········································126
7-1) Model : RFG23** ·······································126

8. SCHEMATIC DIAGRAM ······································127
8-1) Whole block diagram ·····································127

8-1-1. MODEL : RFG237** ···································127
8-1-2. MODEL : RFG238** ···································128
8-1-3. MODEL : RFG23*** ···································129

8-2) CIRCUIT DIAGRAM ······································130

8-2-1. Main ··········································130
8-2-2. INVERTER ·······································131

4

1. PRECAUTIONS(SAFETY WARNINGS)

●

Unplug the appliance before the changing or repairing the electric parts.

→

Be careful the electric shock.

●

When exchanging the parts, use the correct parts.

→

Check the model name, rating voltage, rating current, running

temperature symbols.

●

When troubleshooting, connect firmly the types of harness.

→

Make not to be separated when some power is imposed.

●

Check the traces of water infiltration at the electric parts.

→

If there is a trace of water infiltration, exchange or tape the parts.

●

Check the assemble status of parts after troubleshooting.

→

It must be in the same assembled state when compared with the state before
disassembly.

●

Check the use circumstance of refrigerator.

→

If the refrigerator is installed at the place that is damp or wet, or

status of installation is unstable, change the installation place.

●

Ground the refrigerator properly

→

Particularly, Be sure to earth when there is a risk of an electric

leakage by humidity or wetness.

●

Do not use multi plugs in a plug socket at the same time.
Check if the power cord and socket is damaged, pressed, squeezed,
or fired.

→

If the plug or plug socket is damaged, repair or exchange it

immediately.

●

Do not allow consumers to repair the appliance by themselves.

●

Do not store other materials except the foods.

→

Drugs or scientific materials : difficult to keep precise temperature.

→

The inflammables(alcohol, benzene, ether, LP gas, butane gas etc.):

have risk of explosion.

5

PRECAUTIONS(SAFETY WARNINGS)

Read all instructions before repairing the product and follow the instructions
in order to prevent danger or property damage.
Plug out and remove all the items in regrigerator prior to repair.

CAUTION/WARNING SYMBOLS DISPLAYED

SYMBOLS

Indicates that a
danger of death
or serious injury
exists.

Indicates that a risk
of personal injury
or material damage
exists.

means “Prohibited”.

means “Do not disassemble”.

means “No contact”.

means ”Warning or Caution”.

means “Earth or Ground”.

means “Unplug the unit before
preforming service”

Plug out to exchange the interior
lamp.

●

It may cause electric shock.

Warning

Warning & Caution

Caution

Unplug

Use the rated components
on the replacement.

●

Check the correct model, rated
voltage, rated current, operating
temperature and so on.

On repair, make sure that the
wires such as harness are
bundled tightly.

●

Bundle tightly wires in order not to be
detached by the external force and then not
to be wetted.

Check if there is any trace
indicating the permeation
of water.

●

If there is that kind of trace, change

the related components or do the

necessary treatment
such as taping
using the
insulating tape.

After repair, check the
assembled state of components.

●

It must be in the same assembled state
when compared with the state before
disassembly.

On repair, remove completely dust
or other things of housing parts,
harness parts, and check parts.

●

Cleaning may prevent the possible fire by

tracking or short.

Rated

components

6

PRECAUTIONS(SAFETY WARNINGS)

❈

Please let users know following warnings & cautions in detail.

Do not allow users to put bottles or
kinds of glass in the freezer.

●

Freezing of the contents may inflict a wound.

Do not allow users to store narrow
and lengthy bottles or foods in a
small multi-purpose room.

●

It may hurt you when refrigerator door is
opened and closed resulting in falling stuff
down.

Do not allow users to store
pharmaceutical products, scientific
materials, etc., in the refrigerator.

●

The products which need precise
temperature control should not be stored in
the refrigerator.

Do not allow users to store
articles on the product.

●

Opening or closing the door may cause
things to fall down, which may cause
injury.

Prohibition

Warning & Caution

Do not allow users to
disassemble, repair or alter.

●

It may cause fire or abnormal

operation which leads to injury.

Do not

disassemble

Do not allow users to plug
several appliances into the same
power receptable.

●

May cause abnormal generation of

heat or fire.

Prohibition

Do not allow users to bend the
power cord with excessive force
or do not have the power cord
pressed by heavy article.

●

May cause fire.

Do not allow users to install the
refrigerator in the wet place or
the place where water splashes.

●

Deterioration of insulation of electric

parts may cause electric shock or fire.

Make sure of the earth.

●

Be sure the product is properly grounded.

Earth

7

PRECAUTIONS(SAFETY WARNINGS)

For proper installation, this refrigerator must be
placed on a level surface of hard material that is
the same height as the rest of the flooring. This
surface should be strong enough to support a fully
loaded refrigerator, or approximately
660lbs(299kg).

FLOORING

Protect the finish of the flooring. Cut a large
section of the cardboard carton and place
under the refrigerator where you are working.
When moving, be sure to pull the unit straight
out and push back in straight.

MOVING

8

2. PRODUCT SPECIFICATIONS

2-1) INTRODUCTION OF MAIN FUNCTION ···························9

2-2) SPECIFICATIONS ····································11

2-3) INTERIOR VIEWS ····································12

2-4) MODEL SPECIFICATION ·································13

2-5) MODEL SPECIFICATION &SPECIFICATION CHART ····················14

2-6)DIMENSIONS OF REFRIGERATOR (INCHES)························17

2-7) OPTIONAL MATERIAL SPECIFICATION ··························18

2-8) REFRIGERANT ROUTE IN REFRIGERATION CYCLE ····················19

2-9) COOLING AIR CIRCULATION ·······························25

2. PRODUCT SPECIFICATIONS

●●

A newly developed SAMSUNG bottom mount freezer in 2009 has the following
characteristics.

2-1) Introduction of Main Function

9

Surround Multi Flow

●●

Uniform cooling for each shelf and even in corner in fresh
food compartment by centerpositioned fan and duct with
multiple flow effluences.

Twin Cooling System

●●

The refrigerator and the freezer have two evaporators.
Given this independent system, the freezer and the
refrigerator are cooled individually as required and are,
therefore, more efficient.
Food odor from the refrigerator does not affect food in the
freezer due to separate air flow circulation.

Ice and Water Dispenser

●●

The ice and water dispenser provides ice and cold water at
any time.

Secure Auto Close Door System

●●

Secure Auto Close Door System

●●

Cool tight doors

●●

Energy saving

●●

Preventing sweat on fridge doors

Easy Handle System

●●

Ez-open Freezer Door

●●

Ergonomic Door Design

Electronic control from outside of Pantry Cover

●●

Adjustable temperature control ((around 41℉(5℃) : Deli /
around 38℉(3℃) : Fresh / around 34℉(1℃) Chilled )
Temperature control from outside of the Pantry : user
friendly design helps keep foods fresh for longer

Easy Handle

●●

The freezer door is more user-friendly.
So, it comes as much convenient.

10

2. PRODUCT SPECIFICATIONS

Drawer

●●

The dimension of the right-side drawer is 6:4 (H x W)
with the shelf being raised.

So, the right-side drawer can be pulled out with the
left door closed.

Dual Ice Maker

●●

7 cubes ice-Maker(Refrigerator)

●●

7 cubes ice-Maker(Freezer)

11

2-2) Specifications

PRODUCT SPECIFICATIONS

Defrost Control From 24 to 32 hrs
Thermo Bimetal Protector 140°F(60℃)(off) 104°F(40℃)(on)
Defrost Thermistor(502AT) 50°F(10℃)(off)
Electrical Rating AC115V 60Hz 11.6 Amps
Maximum Current Leakage 0.25 mA
Maximum Ground Path Resistance 0.1 Ohm
Energy Consumption 550KWh/year

Ambient Temperature 70

℉(21℃) 90℉(32℃)
Refrigerator,℉ 34℉(1℃)∼46℉(8℃) 34℉(1℃)∼46℉(8℃)
Freezer,℉ -8℉(-22℃)∼8℉(-13℃) -8℉(-22℃)∼8℉(-13℃)
Run Time,% 󳠞40 󳠞60

Refrigerant Charge (R134a) 5.64 oz(160g)
Compressor(BK190C-L2C) 1314 Btu/hr(0.385kw)
Compressor oil Freol α15c
R Capillary tube(Dia, Length) 0.032

＂＂

,118

＂＂((00..8822mmmm,,33550000mmmm))

F Capillary tube(Dia, Length) 0.032

＂＂

,118

＂＂((00..8822mmmm,,33550000mmmm))

Clearance must be provided for air circulation
AT TOP 2

＂＂ ((5511mmmm))

AT SIDES 3.75

＂＂ ((9955mmmm))

AT REAR 2

＂＂ ((5511mmmm))

Fan

Fan

Fan

Fan

Fan

Fan

(Air inlet)

(Air inlet)

(Air inlet)(Air inlet)

(Air inlet)

(Air inlet)

Heat exchanger

Heat exchanger

Heat exchanger

Fan

Fan

(Air inlet)(Air inlet)

Heat exchanger

Fan

Fan

Fan

(Air inlet)

(Air inlet)

(Air inlet)

Heat exchanger

ELECTRICAL SPECIFICATIONS

Freezer

Refrigerator

NO LOAD PERFORMANCE

REFRIGERATION SYSTEM

INSTALLATION

Compressor

C-Fan Noise FilterDryer

Condenser Water Valve

12

PRODUCT SPECIFICATIONS

2-3)

Interior Views

Freezer

Refrigerator

Auto Door Closer

Dairy Compartment

Tempered glass shelves

Water Filter

Door Bins

Cool Select Pantry

Light

Vertical Hinged

Section

Vegetable & Fruit

Drawers

Light

Super Extended Drawer

Freezer Drawer Bin

Slide-Shelf

Quick-Space

Glass Shelf

Ice-Maker

Foldable-Shelf

Can carry

FZ Ice-Maker(RFG238)

Ice Bucket(RFG238)

Tilting Pocket

PLUS

SAMSUNG

RFG238AA

Twin Cooling

Contour

Cool Select Pantry

203

189

-29.4

1.5

-22.8

1.0

0.2

0.3

64.6

45.5

44.6

13

2-4) Model Specification

PRODUCT SPECIFICATIONS

F-Room

R-Room

F-Room

R-Room

F-Room

R-Room

F-Room

R-Room

N-N

Sound Power Level

Sound Pressure Level

Cooling

Speed(Min)

Product Zone

Appearance

ITEM SPEC

89.6℉(32°C)

109.4℉(43°C)

Temperature

Distribution

(Fridge)

Run Time

Performance

Noise

Cooling Tech

Door Shape

Special Room

250↓

250↓

-26.0↓

2.0↓

-18.0↓

5.0↓

2.0↓

2.0↓

70%↓

46dB↓

45dB↓

MAYTAG

MFI2067AES

Mono Cooling

Contour

Pantry

185

740

-28.0

-0.2

-23.0

7.4

0.5

0.5

47.6

49.4

48.6

LG

LFX21980ST

Mono Cooling

Contour

Pantry

197.8

193.7

-25.9

-0.4

-20.9

2.2

1.5

1.5

73.3

47.6

44.3

COLOR

ModelITEM

14

2-5) Model Specification &Specification Chart

PRODUCT SPECIFICATIONS

External Size

Net

Capacity

Weight

Packing

D

H

W

Efficiency of Volume

On Cabinet
W/O Handle
With Handle

W/O Hinge Cap
With Hinge Cap

Total

Freezer

Refrigerator

Set

Packing

Width
Depth

Height

Black

Real STS

White

Platinum STS

Cabinet (Both Side)

All Black

Noble STS

Snow White

Noble STS

Door

Empire Black

Real STS

Snow White

Platinum Inox

Molding

I Black

Creamy STS

Snow White

Creamy STS

Compressor

Rated Frequency and Frequency

Refrigerant

Foaming Agent

Refrigerant Input Amount

Type Refrigerator

Motor Rated Consumption Power

Electric Heater Rated Consumption Power

RFG238AA (RFG237AA)

Ice & Water Dispenser with Pantry

35 3/4 inch (908mm)

24 3/16 inch (614mm)

28 inch (712mm)

30 1/2 inch (774mm)
69 5/8 inch (1769mm)
69 3/4 inch (1774mm)

22.5 Cu.ft (637.0ℓ)

6.7 Cu.ft(189.5ℓ)

15.8 Cu.ft(447.5ℓ)

55.4%
313 Pounds (142kg)
346 Pounds (157kg)

38 3/8 Inch (974mm)
33 5/8 Inch (854mm)

75 3/4 Inch (1923mm)

Reciprocate

AC 115V/60Hz

R 134a

C-Pentane

5.64 oz (160g)

Indirect Cooling Method Refrigerator

140W
380W

Items

Model

15

PRODUCT SPECIFICATIONS

Compressor

Evaporator

Model

First Defrost Cycle (Concurrent defrost of F and R)

Defrost Cycle(FRE)
Defrost Cycle(REF)

Pause time

THERMISTOR

(F-SENSOR)

502AT

Temperature Selection

-8℉(-22℃)

-2℉(-19℃)
8℉(-13℃)

Model

THERMISTOR

(R-SENSOR)

502AT

F Defrost-Sensor

R Defrost-Sensor

F Bimetal-thermo

Protector

R Bimetal-thermo

Protector

Temperature Selection

34℉(1℃)
38℉(3℃)
46℉(8℃)

Model
SPEC
Model
SPEC
Rated

Operating temperature

Rated

Operating temperature

Condenser

Dryer

Capillary tube(Dia x Length)

Refrigerant

Model

Starting type

Oil Charge

Freezer

Refrigerator

BK190C-L2C

BLDC

FREOL α- 15c
SPLIT FIN TYPE
SPLIT FIN TYPE

Forced and Natural Convection Type

Molecular shieve XH-9

R : 0.032” x 118” (0.82mm x 3500mm) / F : 0.032” x 118” (0.82mm x 3500mm)

R134a

6hr ±10min

12~22hr(vary according to the conditions used)

6~11hr(vary according to the conditions used)

12 ±1min

THERMISTOR (502AT)

5.0 ㏀ at 77℉(25℃)

THERMISTOR (502AT)

5.0 ㏀ at 77℉(25℃)
AC 125V 10A

Off : 140℉(60℃) / On : 104℉(40℃)

AC 125V 10A

Off : 140℉(60℃) / On : 104℉(40℃)

ON(℉)

-5℉(-21℃)
1℉(-17℃)

11℉(-12℃)

ON(℉)
36℉(2℃)
40℉(4℃)
48℉(9℃)

OFF(℉)

-11℉(-24℃)

-5℉(-21℃)
5℉(-15℃)

OFF(℉)
32℉(0℃)
36℉(2℃)
44℉(7℃)

Specification

RFG238AA (RFG237AA)

Components for FreezerDefrost Related Components

FreezerRefrigeratorDefrost Cycle

Defrost SensorBimetal

Room Temperature Sensor Components

16

PRODUCT SPECIFICATIONS

Items

Model

Defrost Heater(FRE)
Defrost Heater(REF)
DISPENSER Heater

FRENCH Heater

ICE Duct Heater

Water Tank Heater

Interlock with French Heater

-

Interlock with Defrost Heater (FRE)

-

Model

Temp.ON

Temp.OFF

Over Load Relay

Rated Voltage

Motor-BLDC(FRE)

Motor BLDC(ICE ROOM)

Motor-BLDC(REF)

Motor-BLDC(CIRCUIT)

Motor-DAMPER(PANTRY)

Lamp LED (FRE)
Lamp LED (REF)
Lamp LED (VEG)

Heated at F Defrost

Heated at R Defrost

Door Switch

FRE
REF

REF(ICE ROOM)

Power Cord
Earth Screw

Bimetal thermo for Preventing Overheating of Refrigerator Lamp

Specification

RFG238AA (RFG237AA)

Electric Components

AC 115V, 240W

AC115V, 120W

AC115V, 1.6W

AC115V, 8W
AC115V, 7W

DC 12V, 2W

AC125V 6A / AC250V 3A Off: 140℉(60℃)/ On : 104℉(40℃)

4TM445PHBYY-82

156.2± 16.2℉(69± 9℃)
257± 9℉(125± 5℃)

AC 115V/ 60Hz
DC12V / DREP5020LC
DC12V / DREP5020LB
DC12V / DREP5020LC
DC12V / DRCP5030LA
DC12V / NSBY001TH1

DC12V / 180mA
DC12V / 540mA

DC 12V / 60mA

AC 125V 1.5A (1EA)

DC200V 1.5A / MS-406-SS-01(2EA)

125V / 5A. EMB816

AC125V 15A

STS304

17

PRODUCT SPECIFICATIONS

24 3/16"(614mm)

3 3/8"(87mm)

18 1/4"(462mm)

42 1/2"(1080.5mm)

5/8"(16mm)

69 3/4

"

(1774mm)

1 3/8"(34mm)

3/16"(5mm)

28 1/2"(712mm)

30 1/2"(774mm)

35 3/4"(908mm)

24 3/8"(618mm)

2 3/8"(59.5mm)

46 1/4"(1174mm)

18 3/4"(475mm)

42 7/8"(1088mm)

2-6)Dimensions of Refrigerator (Inches)

18

PRODUCT SPECIFICATIONS

2-7) Optional Material Specification

Part Name

FILTER

WATER-ASSY

DA29-00003G

ASSY-PACKING

SUB

DA99-00240S

Part Code

AMOUNT

1

1

LED LAMP FRE

DA96-00398C

1

LED LAMP REF

DA96-00398B

1

19

1. Compressor → Condenser → Hot Pipe → Back Cluster Pipe → Dryer → Step Valve → R Capillary Tube →
Refrigerator Evaporator → Freezer Evaporator → Suction Pipe → Compressor

2. Compressor → Condenser → Hot Pipe → Back Cluster Pipe → Dryer → Step Valve → F Capillary Tube →
Freezer Evaporator → Suction Pipe → Compressor

PRODUCT SPECIFICATIONS

2-8) Refrigerant Route in Refrigeration cycle

20

PRODUCT SPECIFICATIONS

2-8-1. PRINCIPLE OF FREEZEER

0 psi

142.2 psi

142.2 psi

0.016~0.031"

0.25"

0.19"

164.2"

142.2 psi

21

PRODUCT SPECIFICATIONS

2-8-2. Operation theory of refrigeration cycle components

■ Condenser

1) Role: A device which radiates heat to the outside (water/air) to make liquid state for the high
temperature / high pressure gas refrigerant discharged from compressor

2) Types

A. Air-cooling Type : Condense air by circulating naturally or manually.

1) Natural Convection Type : Used for the household refrigerator which has small condensing
capacity.

2) Manual Convection Type : Circulate air manually by FAN-Motor (Large capacity)

B. Water-cooling Type : Make cooling water pass through the pipe in the condenser (Large

capacity)

※ Location

① CLUSTER heat-radiating type : All Pipes effective for radiating heat are formed in the

right/left, and front side of refrigerator with hard urethanes and radiate heat through the
whole surfaces of cabinet to ambient air.

② Install the condenser on the outside of the product. (An old model)
③ Make them cluster at the lower part of product and radiate heat manually by fan.

☞ Radiate condensed potential heat up to liquefy completely and make change the state

without changing the gas temperature itself.

※ Pipe out diameter

① Low pressure: 0.25

＂＂

② High pressure : 0.19＂＂③ Capillary : About 0.075

＂＂

※ Condenser length : 1113.2

＂＂

① CONDENSER-PIPE : 633.9＂＂② HOT-PIPE: 313.9＂＂③ CLUSTER-PIPE: 165.4

＂＂

■ Capillary

1. Role: A device which makes low temperature and pressure refrigerant by reducing the
pressure the normal temperature / high pressure liquid refrigerant condensed from
condenser, and supply it to the evaporator.

A. To evaporate more lower temperature in case of evaporation.
B. It flows to the evaporator without back flowing to condenser, if compressor stops, and the

difference of pressure between high pressure and low pressure is small so it is easy to
operate the compressor again.

2. Outline

A. Thickness : About 0.075

＂＂

B. Length : It is changeable to low temperature and pressure depends on the 138

＂＂ooff

thin

and long copper pipe wall resistance.

22

PRODUCT SPECIFICATIONS

2-8-3. Operation theory of refrigeration cycle components

■ Evaporator

1. Role: As the low pressure liquid refrigerant flowed from capillary absorbs heat inside of the
refrigerator, it becomes low pressure gas and refrigerate the foods.

2. Theory: The low pressure refrigerant flowed to evaporator operates cooling which takes
ambient evaporated potential heat with maintaining the evaporation up to evaporate
completely.

3.Types of Evaporator

A. ROLL-BOND Evaporator → Direct Cooling ONE-DOOR Type
☞ Rolled and adhere the 2 aluminum plate and then make refrigerant passage.
B. PIN-PIPE Type → Indirect cooling TWO-DOOR Type

☞ a small aluminum plate on the aluminum pipe to increase the cooling effect.

■ Compressor

1. Role: It operates same as pump which pull out the subterranean water. It inhales the low
temperature and pressure refrigerant gas (flowed out) from evaporator and make high
temperature and pressure refrigerant liquid in the compressor and send it to the condenser.

2. Type of Condenser
a. Back-and-forth motion type: A method that pistol makes back-and-forth motion through

shaft and cylinder of motor rotation and compresses. ※ Used for household refrigerant

b. Rotary Type: A method that inhales the refrigerant gas through the gap between the

outside of rotor electric attached on the shaft and the inside of cylinder and compresses.

c. Centrifugal Type

3. Please insert the explanation of inverter comp operation theory.

■ Dryer

1. Role: Absorb the moisture from the refrigerant that refrigeration cycle circulates and
eliminate the foreign substance.

2. Structure: If even some moisture is included refrigerant is impossible to circulate by freezing
the small capillary outlet, so silica gel or molecular sieve is (included and) sealed to absorb
the internal moisture, and install a minute net to eliminate the foreign substance.

23

PRODUCT SPECIFICATIONS

2-8-4. Operation theory of refrigeration cycle components

※.Influence of moisture

① Moisture precipitation – Blocked by ice
② Refrigerant and reaction
③ Life reduction of oil
④ Acceleration of oxidization
⑤ Copper plating phenomenon
⑥ Gas dissolution by the interaction of synthetic insulating material (insulator)

※.Influence of foreign substance

① Increase of condensed temperature.
② Increase of temperature.
③ Decrease of cooling efficiency
④ Shorten the life by friction between oil and foreign substance in the compressor.

■ Accumulator

1. Role : To send a pure refrigerant gas to compressor by removing completely the refrigerant
liquid from evaporator.

※ If a refrigerant liquid go into the compressor, overload is occurred.

24

PRODUCT SPECIFICATIONS

2-8-5. Refrigeration Cycle Type

TDM Cycle

Compressor

Freezer Hot-Pipe

3Way Valve Fridge Capillary Tube

Freezer Capillary Tube

Fridge Evaporator

Freezer Evaporator

AccumulatorSuction Pipe

Connected Pipe

Fridge Hot-Pipe Dryer

Condenser

Cluster Rear

25

Refrigerator

PRODUCT SPECIFICATIONS

2-9) Cooling Air Circulation

Freezer

26

3. DISASSEMBLY AND REASSEMBLY

3-1) PRECAUTION ······························27

3-2) REFRIGERATOR DOOR ·························28

3-3) DOOR HANDLE FREEZER ························30

3-4) REFRIGERATOR LIGHT ·························31

3-5) COVER-DISPLAY & WATER-DISPENSER··················31

3-6) WATER-DISPENSER ···························32

3-7) GLASS SHELF ·····························33

3-8) FOLDABLE GLASS SHELF ························33

3-9) VEGETABLE & FRUIT DRAWERS SHELF ·················34

3-10) COOL SELECT PANTRY·························35

3-11) WATER TANK ·····························36

3-12) MOTOR DAMPER····························37

3-13) WATER FILTER (DISASSEMBLY) ·····················38

3-14) WATER FILTER (REASSEMBLY) ·····················39

3-15) GALLON DOOR BIN ··························39

3-16) VERTICAL HINGED SECTION ······················40

3-17) EVAPORATOR COVER IN REFRIGERATOR ················41

3-18) EVAPORATOR IN REFRIGERATOR····················42

3-19) SUPER EXTENDED DRAWER ······················43

3-20) FREEZER DOOR ····························44

3-21) ICE-MAKER ······························45

3-22) FREEZER LIGHT ····························46

3-23) DOOR SWITCH IN FREEZER ······················46

3-24) EVAPORATOR COVER IN FREEZER ···················47

3-25) EVAPORATOR IN FREEZER ·······················47

3-26) MACHINE COMPARTMENT ·······················48

3-27) ELECTRIC BOX ····························51

27

DISASSEMBLY AND REASSEMBLY

• Unplug the refrigerator before cleaning and making repairs.

• Do not dissemble or repair the refrigerator by yourself.

- It may cause risk of causing a fire, malfunction and/or personal injury.

• Remove any foreign matter or dust from the power plug pins.

- Otherwise there is a risk of fire.

• Do not use a cord that shows cracks or abrasion damage along its length or at either end.

• Do not plug several appliances into the same multiple power board. The refrigerator should always be plugged
into its own individual electrical which has a voltage rating that matched the rating plate.

- This provides the best performance and also prevents overloading house wiring circuits, which could cause a
fire hazard from overheated wires.

• Do not install the refrigerator in a damp place or place where it may come in contact with water.

- Deteriorated insulation of electrical parts may cause an electric shock or fire.

• The refrigerator must be grounded.

- You must ground the refrigerator to prevent any power leakages or electric shocks caused by current leakage
from the refrigerator.

• Do not put bottles or glass containers in the freezer.

- When the contents freeze, the glass may break and cause personal injury.

• Do not store volatile or flammable substances in the refrigerator.

- The storage of benzene, thinner, alcohol, ether, LP gas and other such products may cause explosions.

• Water whitening phenomenon

- All water provided to refrigerators flows through the core filter which is an alkaline water filter. In this process,
the pressure in the water that has flowed out of the filter gets increased, and massive oxygen and nitrogen
become saturated. When this water flows out in the air, the pressure plummets and the oxygen and nitrogen
get supersaturated so that they turn into gas bubbles. The water could look misty due to these oxygen bubbles.
It is not because dust or chemicals, just a few seconds later, it will be clean again.

- Required Tools

3-1) PRECAUTION

IMAGE ITEM USE

Phillips Head Driver

Use for assembling and

disassembling of screw

Flat Head Driver

Use for assembling and disassembling

of HomeBar, Dispenser, Deli

Cartessen Box, Main PBA etc...

Hex Wrench Ø0.08

＂＂

Use for assembling and

disassembling of Handle

Socket Wrench Ø0.4

＂＂

Use for assembling and

disassembling of Door Hinge

28

3-2) Refrigerator Door

DISASSEMBLY AND REASSEMBLY

Refrigerator

Door

Part Name How To Do Descriptive Picture

1. With the door opened, remove
the Top Table cap(󱀊) with a Flat
head screwdriver, and close the
door.

3. Disconnect the electrical
onnector(󱀌) above the upper
right door hinge and the 3
electrical connectors(󱀍) above
the upper left door hinge.
Disconnect the fastener in tube
fitting(󱀎) and the water tube(󱀏)

by pulling the tube fitting(󱀎)

apart as shown in the picture.

2. Remove the 3 screws holding
down the Top Table and remove
the Top Table(󱀋).

4. Remove the 3 hex head bolts(󱀐)
attatched to the upper left and right
door hinges with a Wrench(0.4

＂＂

).
With a Philips head screwdriver,
remove the ground screw(󱀑)
attatched to the upper left and right
door hinges. Remove the upper left
and right door hinges(󱀒).

󱀊

󱀋

󱀌

󱀍

󱀎

󱀐

󱀑

󱀒

󱀏

29

DISASSEMBLY AND REASSEMBLY

Refrigerator

Door

Part Name How To Do Descriptive Picture

5. Lift the door straightly up to
remove.

6. With a Philips head screwdriver,
remove the screw (󱀓) attatched
to the lower left and right door
hinges.
With a wrench(0.4

＂＂

), remove
the 2 flat head screws (󱀔)
attatched to the lower left and
right door hinges.
Remove the lower left and right
door hinges (󱀕).

COVER VINYL

Part Name How To Do Descriptive Picture

1. Using a wrench, unscrew the
two screws. And disassemble
the door handle.

2. Remove the cover vinyl of door.

󱀕

󱀓

󱀔

30

DISASSEMBLY AND REASSEMBLY

Door Handle

Freezer

Part Name How To Do Descriptive Picture

1. Remove the Cap Door with a

flat-blade(-) screwdriver.

2.Remove 4 screws

3. Lift up the handle to have the

Slider Handle Fre(󱀊) pushed
back.

4. After having the Slider Handle

Fre(󱀊) pushed back, screw up
at the hole.

5.Remove the door handle by

lifting it up.

󱀊

󱀊

3-3) Door Handle Freezer

31

DISASSEMBLY AND REASSEMBLY

3-4) Refrigerator Light

3-5) Cover-Display & Water-Dispenser

Cover-Display

Part Name How To Do Descriptive Picture

1. Hold the Ice & Water select tab
and pull it forward to take off the
Display Panel.
Take care not to break it.

2. Disengage the housing connect
of display cover.

3. Remove 4 screws of cover
display.

Refrigerator

Light

Part Name How To Do Descriptive Picture

1. Remove the lamp cover by
pulling it down as pushing the
rear of lamp cover.

2. Remove the screw. And
separate the LED panel.

32

DISASSEMBLY AND REASSEMBLY

Cover-Display

Part Name How To Do Descriptive Picture

4. Remove 4 screws of cover-

display.

3-6) Water-Dispenser

Water-Dispenser

Part Name How To Do Descriptive Picture

1. Disengage the 3 Housing

Connectors.

2. Remove 2 screws of the Case

Ice Route Assy.

3. Pull the Case Ice Route Assy.

4. Push the hook and remove the

Micro Switch.

33

DISASSEMBLY AND REASSEMBLY

Water-Dispenser

Part Name How To Do Descriptive Picture

1. Assembly shall be in order from
the disassembly. Case-Ice and
Route shall be assembled inside
of hose. Otherwise, assemble
cannot be accomplished.

2. When assembling Cover­Display, first insert it from
leftside and then assemble to
rightside.
Otherwise, the hook can be
broken.

3-7) Glass Shelf

Glass Shelf

Part Name How To Do Descriptive Picture

Remove the shelf by lifting the
front part of the shelf up and
pulling it out.

hose

3-8) Foldable Glass Shelf

Foldable Glass

Shelf

Part Name How To Do Descriptive Picture

Remove 2 screws of the Folderble
Glass Shelf

34

DISASSEMBLY AND REASSEMBLY

3-9) Vegetable & Fruit Drawers Shelf

Vegetable & Fruit

Drawers Shelf

Part Name How To Do Descriptive Picture

1. Remove the vegetable & fruit

drawer by pulling the roller part
and lifting it up.

2. Remove the vegetable & fruit

drawer shelf by pulling it out.
(Refer to the picture)

Vegetable & Fruit

LED LAMP

Part Name How To Do Descriptive Picture

1. Pull out the Cover LED with a

flat head screwdriver.

2. Pull out the Case LED with a flat

head screwdriver.

3. Disengage the housing

connector.

35

DISASSEMBLY AND REASSEMBLY

3-10) Cool Select Pantry

Cool Select Pantry

Part Name How To Do Descriptive Picture

1. Remove the cool select pantry
by pulling the roller part and
lifting it up.

Cool Select Pantry

Cover

1. Remove the cool select pantry
cover by lifting up the left part of
the cover and pulling it.

Cool Select Pantry

Shelf

1. Remove the cool select pantry
shelf by lifting the front part of
the shelf while pulling it.

Cool Select Pantry

Rail

1. Remove the cool select pantry
rail by unscrewing the 2 screws
and pulling the rail.

2. Disconnect the housing
connector from the internal rail
part.
(Refer to the picture)

36

DISASSEMBLY AND REASSEMBLY

3-11) Water Tank

Part Name How To Do Descriptive Picture

The Water Tank is located in the
lower part of the fridge. Before
disassembling the Water Tank take
out shelves and drawers and
pantry located in front of the Water
Tank.

1. Remove 2 screws of the Water

Tank cover.

2. Disengage the housing

connector.

3. Remove the 1 screws attached

to the Water Tank Heater.
Remove the Water Tank heater.
Remove the Water Tank cover.

Water Tank

37

DISASSEMBLY AND REASSEMBLY

Water Tank

Part Name How To Do Descriptive Picture

One Water Tube is located in the
machine compartment of the
refrigerator. Before disassembling
the Water Tube, take out the
compressor cover.

5. Remove the water valve fixed by
the screw.

6. Disconnect the water tube by
pushing the tube fitting apart as
shown in the picture.

7. Remove the cap tube fitting with
a flat head screwdriver.

The other Water Tube is located in
the Top Table of the refrigerator.
Before disassembling the Water
Tube, take out the Top table.

8. Disconnect the Water Tube by
pushing the tube fitting apart as
shown in the picture.

9. Remove the Water Tank by
pulling the Water Tube.

38

DISASSEMBLY AND REASSEMBLY

3-12) Motor Damper

3-13) Water Filter (Disassembly)

Motor Damper

Part Name How To Do Descriptive Picture

2. Disengage 2 housing

connectors from the rear motor
damper.
(Refer to the picture)

Water Filter

Part Name How To Do Descriptive Picture

1. Remove the shelf by lifting the

front plane of the shelf up and
pulling it out.

2. Remove the water filter by

turning it counterclockwise.
(Refer to the picture)

1. Remove the cool select pantry.

Remove the screw of motor
damper part and than push the
motor damper down.

39

DISASSEMBLY AND REASSEMBLY

3-14) Water Filter (Reassembly)

3-15) Gallon Door Bin

Gallon Door Bin

Part Name How To Do Descriptive Picture

1. Remove the gallon door bin by
lifting it up.
(Refer to the picture)

Water

Filter

Part Name How To Do Descriptive Picture

1. Place the part of (ⓐ) arrow (that
is indicating in the picture) in the
middle of the front filter cover
push it up.

2. Turn the water filter clockwise
until central horizontal line of
filter cover and both ends of
water filter label are aligned.
(Refer to the picture.)

ⓐ

40

DISASSEMBLY AND REASSEMBLY

3-16) Vertical Hinged Section

Vertical Hinged

Section

Part Name How To Do Descriptive Picture

1. Remove 2 screw caps with a

flat-blade(-) screwdriver.
(Refer to the picture)

2. Unscrew 2 screws.

3. Disengage the internal housing

connector of the vertical hinge.

4. Remove the vertical hinged

section by lifting the vertical
hinge up.
(Refer to the picture)

41

DISASSEMBLY AND REASSEMBLY

3-17) Evaporator Cover In Refrigerator

Evaporator Cover

In Refrigerator

Part Name How To Do Descriptive Picture

1. Remove the angle cap with a
flat-blade screwdriver.
(Refer to the picture)

2. Unscrew 4 screws.

3. Remove the the lower part of
angle mid by pulling it out and
pushing it down.
(Refer to the picture)

4. Remove the hook by pulling it
from the lower part and pushing
the cover down.
(Refer to the picture)

5. Disconnect the 2 housing
connectors.
(Refer to the picture)

42

DISASSEMBLY AND REASSEMBLY

3-18) Evaporator In Refrigerator

Evaporator

In Refrigerator

Part Name How To Do Descriptive Picture

1. Remove the the housing cover

by pushing both lateral sides of
the housing cover and pulling it
out.
(Refer to the picture)

2. Disconnect the 3 housing

connectors.
(Refer to the picture)

3. Remove the evaporator by lifting

the bottom side of it up and
pulling it out.
(Refer to the picture)

43

DISASSEMBLY AND REASSEMBLY

3-19) Super Extended Drawer

Super Extended

Drawer

Part Name How To Do Descriptive Picture

2. Lift the drawer up.

3. Remove the drawer by lifting the
bottom part of drawer bin and
pulling it out.

1. Slide the drawer in as much as
possible.

44

DISASSEMBLY AND REASSEMBLY

3-20) Freezer Door

Freezer

Door

Part Name How To Do Descriptive Picture

1. Take out the upper drawer by

lifting it up.

2. Remove the tilting Pocket(①) by

pulling the both brackets(②)
upward at the same time.

3. Take out the lower basket(③) by

lifting the basket up from rail
system.

4. Unscrew 4 bolts.

(2 bolts each on the both sides)

5. Lift up the freezer door from the

rails.

①

②

③

45

3-21) Ice-Maker

DISASSEMBLY AND REASSEMBLY

Ice Maker

Part Name How To Do Descriptive Picture

2. Remove 1 screw of the Cover.

1. Pull the lever forward and take
out the ice bucket.

3. Disassemble the cover with a
flat-blade(-) screwdriver and pull
it out.

4. Disengage the 2 housing
connectors.

5. Push the hook and pull the Ice­Maker out.

6. To disassemble, pull the tab and
pull the Case-Auger and the
motor out.

lever

46

DISASSEMBLY AND REASSEMBLY

3-22) Freezer Light

3-23) Door Switch In Freezer

Door Switch In

Freezer

Part Name How To Do Descriptive Picture

1. Remove the freezer drawer bin
by using a flat-blade(-)
screwdriver.(Refer to the
picture)

2. Disconnect the housing
connector part.

Freezer LED

Part Name How To Do Descriptive Picture

1. Remove the LED by pulling the
LED cover down while pulling
the front plane of LED cover.

47

DISASSEMBLY AND REASSEMBLY

3-24) Evaporator Cover In Freezer

3-25) Evaporator In Freezer

Evaporator In

Freezer

Part Name How To Do Descriptive Picture

1. Remove the housing cover by
pushing both lateral sides of
housing cover part and pulling it
out.
Remove the housing connector
part.

2. Remove the evaporator by
pulling the lower part of the
evaporator while lifting it up.

Evaporator Cover

In

Freezer

Part Name How To Do Descriptive Picture

1. Remove the freezer door and
freezer drawer by pulling out the
drawer and then unscrewing 2
screws.

2. Lift up the evaporator cover.

3. Disengage the 3 housing
connectors and remove the
evaporator cover.

48

DISASSEMBLY AND REASSEMBLY

3-26) Machine Compartment

Motor Fan

Part Name How To Do Descriptive Picture

1. Unscrew 5 screws of cover
compressor.

2. Disengage the housing
connector.
(Refer to the picture)

3. Remove the hooker of support
circuit motor by lifting the hooker
up and pulling it out.

4. Remove the screw with a flat­blade screwdriver.
(Refer to the picture)

5. Remove the motor fan by pulling
the fan out while graping the
motor part.
(Refer to the picture)

6. Unscrew 2 screws fixed in the
motor.

7. Remove the hook of the motor
cover with a flat-blade (-)
screwdriver and then remove
the motor.

49

DISASSEMBLY AND REASSEMBLY

Relay O/L

Water Valve

Part Name How To Do Descriptive Picture

1. Disengage the housing
connector.

2.Remove Cover Relay.

3. Remove the relay O/L with a
flat-blade screwdriver.
(Refer to the picture)

1. Unscrew the screw which is
fixing the Water Valve.

2. Disassembling the fixer hose
which is fixing the four hoses
like a picture.

3.

Remove 2 water hose parts while
pushing the upper part of ①.

(Refer to the picture)

4. Remove the hose connected by
the nut with a wrench(0.31

＂＂

).

50

DISASSEMBLY AND REASSEMBLY

Power Cord &

Noise Filter

Part Name How To Do Descriptive Picture

1. Unscrew 2 screws.

2. Disengage the housing
connector.

3. Unscrew 2 earth screws.

4. Remove the cover by pushing
the hook up using a flat-blade(-)
screwdriver.
(Refer to the picture)

5. Disengage the housing
connector to separate the power
cord and noise filter.

51

DISASSEMBLY AND REASSEMBLY

3-27) Electric Box

PBA Main

PBA Inverter

Part Name How To Do Descriptive Picture

1. Pull the refrigerator forward to
have enough space to work at
the rear side of the appliance.

2. Unscrew 2 screws of the PCB
cover.

3. Disengage all housing
connectors from the main PCB.

4. Remove the main PCB by lifting
the upper part of the hook up.
(Refer to the picture)

1. Remove the cover PCB and
then disengage the housing
connector connected with main
PCB.
Remove the SMPS PCB by
pushing the lower part of the
hook down.

52

4. TROUBLESHOOTING

4-1) FUNCTION FOR FAILURE DIAGNOSIS ···························53

4-1-1. TEST MODE (MANUAL OPERATION / MANUAL DEFROST FUNCTION) ···········53
4-1-2. DISPLAY FUNCTION OF COMMUNICATION ERROR ···················54
4-1-3. SELF-DIAGNOSTIC FUNCTION ····························55
4-1-4. DISPLAY FUNCTION OF LOAD CONDITION ·······················58
4-1-5. EXHIBITION MODE SETTING FUNCTION ························59
4-1-6. OPTION SETTING FUNCTION·····························60
4-1-7. OPTION TABLE ···································62

4-2) DIAGNOSTIC METHOD ACCORDING TO THE TROUBLE SYMPTOM(FLOW CHART) ·······64

4-2-1. IF THE TROUBLE IS DETECTED BY SELF-DIAGNOSIS ··················65
4-2-2. IF FAN DOES NOT OPERATE(F, R, C - FAN) ·······················76
4-2-3. IF ICE ROOM FAN DOES NOT OPERATE ························77
4-2-4. IF ICE MAKER DOES NOT OPERATE··························78
4-2-5. IF ICE MAKER(F) DOES NOT OPERATE(RFG238 MODEL)·················79
4-2-6. IF DEFROST DOES NOT OPERATE (F,R DEF HEATER) ··················80
4-2-7. IF POWER IS NOT SUPPLIED ·····························81
4-2-8. IF COMPRESSOR DOES NOT OPERATE ························82

4-2-9.

WHEN ALARM SOUNDS CONTINUOUSLY WITHOUT STOP(RELATED WITH BUZZER SOUND)

···84
4-2-10. IF PANEL PCB DOES NOT WORK NORMALLY ·····················86
4-2-11. IF PANTRY PANEL PCB IS NOT WORKING NORMALLY ·················87
4-2-12. WHEN REFRIGERATOR ROOM LAMP DOES NOT LIGHT UP ···············88
4-2-13. IF ICE WATER IS NOT SUPPLIED ···························90
4-2-14. IF CUBED OR CRUSHED ICE IS NOT SUPPLIED ····················92
4-2-15. IF COVER ICE ROUTE MOTOR(GEARD MOTOR) IS NOT WORKING NORMALLY ······93
4-2-16. IF INVERTER PCB POWER IS NOT SUPPLIED ·····················94
4-2-17. LED BLINKING FREQUENCY DEPENDING ON PROTECTING FUNCTIONS ········95

INVERTER PCB CIRCUIT DIAGRAM ······························96

53

TROUBLESHOOTING

4-1) Function for failure diagnosis

4-1-1. Test mode (manual operation / manual defrost function)

● If Energy Saver Key + Fridge Key on the front of panel are pressed simultaneously for 8 seconds , it will
be changed to the test mode and all displays on the front of panel will be off.

● If any key on the front of panel is pressed within 15 seconds after the test mode, it will be operated as
below sequence :
manual operation(Freezer compartment 1) → manual operation(Freezer compartment 2) → manual
operation(Freezer compartment 3) → manual defrost of fresh food and freezer compartments(Fd) →
Cancel(Display all off).

● If any key on the front of panel is not pressed within 15 seconds after the test mode, the test mode will be
canceled and it will be returned to previous mode.

● If the test mode is canceled, Recommend the power off and reactivate the refrigerator.

① If Energy Saver Key + Fridge Key are pressed simultaneously for

8 seconds, (displays are all off)

It will be changed to the test mode (manual operation) by pressing any key

1-1) If any key is pressed once in test mode, blinks "FF-1" on the display and it indicates the refrigerator

has entered the manual operation. At this moment, buzzer beeps as an alarm.

1-2) If any key is pressed once at the manual operation1 status, FF-2 will be displayed.

And if any key is pressed one more time, FF-3 will be displayed. FF-2 and FF-3 means manual
operation2 and 3 separately. These 3 functions operate with different RPM of COMP.

1-3) If manual operation is selected, compressor will run at once without 7 minutes delay in any mode. If the

refrigerator is on the defrost cycle at the moment, defrost will be finished and manual operation will
begin.

(Be careful if manual operation get started at the moment of compressor off, over load could be occurred.)

1-4) If manual operation works, compressor & f-fan operate continuously for 24 hours and fresh food

compartment will be controlled by the setting temperature.

1-5) When the manual operation runs, setting temperature will be selected automatically as below: freezer

compartment -8℉.(-22℃), fresh food compartment 32℉(1℃).

1-6) During manual operation, Power Freeze & Power Cool function will not be worked.

If a function is selected, the power function icon of the selected function will be off automatically after
10 seconds.

1-7) Manual operation can be canceled by turning on the appliance after power off(reset) or choosing the

step 3) test cancel mode.

1-8) Alarm(0.25 sec ON/ 0.75 sec OFF) will beep continuously until manual operation is completed and

there is no function to make the sound stop.

Compulsion working 1 : 3600RPM Compulsion working 2 : 2450RPM Compulsion working 3: 2200RPM

1) Manual operation function

①

①

54

4-1-2. Display function of Communication error

TROUBLESHOOTING

2-1) If any key is pressed one more time during manual operation(fresh food compartment), "Fd" shows in

the display and then manual operation will be canceled at once and fresh food and freezer
compartment will be defrosted.

2-2) At this moment, alarm beeps for 3 seconds (0.1 sec ON/ 1 sec OFF) during manual defrost function of

fresh food and freezer compartment.

2) Simultaneous manual defrost(fresh food and freezer compartments) function

3-1) During the simultaneous defrosting of fresh food and freezer compartments simultaneously, if the

display panel change to the test mode and test button is pressed one more time, defrosting of fresh
food and freezer compartments will be canceled at the same time and will return to the normal
operation. Or, all test functions will be canceled by turning main power OFF and ON.

3) Test cancel mode

1-1) If there is no answer for 10 seconds after the panel micom received the requirement of communication,

"Pc - Er" display on the panel PCB will be ON/OFF alternately until the communication error is
canceled. (0.5 sec ALL ON, 0.5 sec ALL OFF alternately)

1-2) “Pc - E” display on the Pantry Room Display will be ON/OFF alternately until the communication error

is canceled. (0.5 sec ALL ON, 1.5 sec ALL OFF alternately)

1) Display function when Panel ↔ MAIN MICOM communication has error

2-1) ”OP - Er” code is repeatedly ON/OFF until Option error settles down.

2) Display function when Panel ↔ MAIN MICOM OPTION has error

55

4-1-3. Self-diagnostic function

1-1) Micom operates self-diagnostic function to check the temperature sensor condition within 1 second

when the refrigerator turned On initially.

1-2) If bad sensor is detected by the self-diagnostic function, the applicable display LED will blink for 0.5

sec.
At this moment, there is no beep sound.(Refer to self-diagnostic CHECK LIST)

1-3) Self-diagnostic button is recognized only when the error is displayed by the bad sensor. Display does

not operate normally but temperature control will be controlled by the emergency operation.

1-4) When the error is detected by self-diagnosis, the error can be canceled automatically if all troubled

sensors are corrected or Self-diagnostic function key (Energy Saver Key + Lighting Key ) are pressed
simultaneously for 8 seconds.
(Return to normal display mode)

2-1) If Energy Saver Key + Lighting Key are pressed simultaneously for 6 seconds during normal operation,

the temperature setting display will operate for 2 seconds (ON/OFF 0.5sec each).
If Energy Saver Key + Lighting Key are pressed simultaneously for 8 seconds (including above 2
seconds), self-diagnostic function will be selected.

2-2) At this moment, self-diagnostic function will be returned with buzzer sound 'ding-dong'.

If there is an error, display of error will be operated for 30 seconds and then return to normal condition
whether problem is corrected or not.
(Refer to self-diagnosis CHECK LIST)

2-3) Input by button is not accepted during self-diagnostic function.

1) Self-diagnostic function in the Initial power ON

2) Self-diagnostic function during normal operation

TROUBLESHOOTING

①

①

①

①

① If Energy Saver Key + Lighting Key are pressed simultaneously

for 8 seconds, the error mode by self-diagnosis will be canceled.

① If Energy Saver Key + Lighting Key are pressed simultaneously

for 8 seconds, the error mode by self-diagnosis will be canceled.

56

TROUBLESHOOTING

󳢬 Self-diagnosis CHECK LIST

NO

1
2
3
4
5
6
7
8

9
10
11
12
13
14
15
16
17
18
19
20
21

Trouble item
Ice Maker Sensor Error(R)
R-Sensor Error
R-DEF-Sensor Error
R-FAN Error
Ice Maker operation Error(R)
R-DEF, Heater Error
Ambient-Sensor Error
F-Sensor Error
F-DEF-Sensor Error
F-FAN Error
C-FAN Error
Ice Room-Sensor Error
F-DEF.-Heater Error
Ice Room FAN Error
Pantry-Damper-Heater Error
Pantry-Sensor Error
Panel↔Main Micom Error
Water Tank-Heater Error
Ice Maker Sensor Error(F)
Ice Maker operation Error(F)
Ice Pipe Heater Error

Display LED

R-1-ⓐ
R-1-ⓑ
R-1-ⓒ
R-1-ⓓ
R-1-ⓔ
R-1-ⓖ
F-1-ⓐ
F-1-ⓑ
F-1-ⓒ
F-1-ⓓ
F-1-ⓔ
F-1-ⓕ

F-1-ⓖ
F-10-ⓑ
R-10-ⓐ
R-10-ⓑ
F-10-ⓖ
R-10-ⓖ
R-10-ⓓ
R-10-ⓔ
R-10-ⓕ

Trouble contents
Senser system in ICE MAKER(R) errors
Sensor system in FF compartment errors
Defrost Sensor system in FF compartment errors
Fan motor system in FF compartment errors
ICE MAKER(R) operation system error
Defrost system in FF compartment errors
Snesor external system errors
Sensor system in FZ compartment error
Defrost Sensor system in FZ compartment errors
Fan motor system in FZ compartment errors
Fan motor system in machinery room errors
Sensor system in ICE ROOM errors
Defrost system in FZ compartment errors
Fan motor system in ICE ROOM errors
Damper Heater open/wire connection errors
Sensor system in Pantry Room errors
Communication between Panel MAIN MICOM error
Water Tank Heater open/wire connection errors
Senser system in ICE MAKER(R) errors
ICE MAKER(F) operation system error
Ice Pipe Heater open/wire connection errors

F-1

F-10

R-1

R-10

57

TROUBLESHOOTING

󳢬 Self-diagnostics check list

R-1-ⓐ

R-10-ⓓ

R-1-ⓑ

R-1-ⓒ

R-1-ⓓ

R-1-ⓔ

R-10-ⓔ

R-1-ⓖ

F-1-ⓐ

F-1-ⓑ

F-1-ⓒ

F-1-ⓓ

F-1-ⓔ

F-1-ⓕ

F-1-ⓖ

F-10-ⓑ

R-10-ⓐ

R-10-ⓑ

R-10-ⓖ

F-10-ⓖ

R-10-ⓕ

Ice Maker(R) Sensor Error

Ice Maker(F) Sensor Error

R-Sensor Error

R-DEF-Sensor Error

R-FAN Error

Ice Maker(R) operation Error

Ice Maker(F) operation Error

R-DEF. Error

Ambient-Sensor Error

F-Sensor Error

F-DEF-Sensor Error

F-FAN Error

C-FAN Error

Ice Room Sensor Error

F-DEF. Error

Ice Room-FAN Error

Pantry-Damper-Heater Error

Pantry-Sensor Error

Water Tank-Heater Error

Panel↔Main communication Error

Ice Pipe-Heater Error

Trouble contentsItemLED

Diagnostic method

Display error : separation of sensor housing
part, contact error, disconnection, short
circuit
Display error of detecting temperature of
sensor: more than 149℉ (+65°C) or less
than -58℉(-50°C)

Display error : sensor housing separation,
contact error, disconnection, short circuit
Display error by detecting temperature of
sensor: more than 149℉(+65°C) or less
than -58℉(-50°C)

Display “Pc - Er” in the panel with alarm : MICOM MAIN
PANEL communication error oP-Er is displayed when the
Option is not equivalent with the right value.

Display error : separation of freezer compartment defrost heater housing
part , contact error, disconnection, short circuit or temperature fuse error.
Display error : the defrosting does not finish though fresh food compartment
defrost is heating continuously for more than 70 minutes.

Display error during operation of applicable
fan motor : Feed Back signal line contact
error, separation of motor wire, motor error

Display error during operation of applicable
fan motor : Feed Back signal line contact
error, motor wire separation, motor error

Display error during operation of applicable
fan motor : Feed Back signal line contact
error, motor wire separation, motor error

Display error : sensor housing separation,contact error,
disconnection, short circuit.
Display error by detecting temperature of sensor: more
than 149℉ (+65°C) or less than -58℉ (-50°C)

Display error when open error is detected by damper
heater : separation of Damper Heater housing part,
contact error, disconnection, short circuit

Display error during operation of applicable fan motor :
Feed Back signal line contact error, motor wire separation,
motor error

Display error : separation of sensor housing, contact error,
disconnection, short circuit.
Display error by detecting temperature of sensor: more than 149℉
(+65°C) or less than -58℉(-50°C)

Display error when open error is detected by Water Tank
Heater : separation of Water Tank Heater housing
part,contact error, disconnection, short circuit

Display error when open error is detected by Ice Pipe
Heater : separation of Water Tank Heater housing
part,contact error, disconnection, short circuit

Display error : ice making kit is harvested
more than 3 times and level error
** Apply to the applicable Ice Maker model.

ice making kit is harvested more than 3
times and level error
** Apply to the applicable Ice Maker model.

Display error : separation of fresh food compartment defrost heater housing
part, contact error, disconnection, short circuit or temperature fuse error.
Display error : the defrosting does not finish though fresh food compartment
defrost is heating continuously for more than 80 minutes.

The voltage of MAIN PCB CN30 #7↔CN76
#1:shall be between 4.5V~1.0V

The voltage of MAIN PCB CN90 #8 ↔#4:
shall be between 4.5V~1.0V

The voltage of MAIN PCB CN30#6↔
CN76#1:shall be between 4.5V~1.0V

The voltage of MAIN PCB CN30#8↔
CN76#1:shall be between 4.5V~1.0V

Voltage of MAIN PCB CN76-4 Orange ↔ 1
Gray shall be between 7V~12V

After replacing ice maker, check the operation
by turning the appliance ON again.

After replacing ice maker, check the operation
by turning the appliance ON again.

After separating MAIN PCB CN70,CN71 from PCB, the resistance value
between CN70 White ↔ CN71 Orange shall be 110(441) ohm ± 7%.
(Resistant value is varied by the input power)
0 Ohm : heater short, ∞ Ohm : wire / bimetal Open.

The voltage of MAIN PCB
CN31#1↔#4 : shall be between 4.5V~1.0V.

The voltage of MAIN PCB CN30#3↔
CN76#1:shall be between 4.5V~1.0V

The voltage of MAIN PCB
CN30#4↔CN76#1:shall be between 4.5V~1.0V

Actually, If there is not a problem, it is desirable to
replace Main and Panel PCB With the oscilloscope
after a cable problem confirming.

Voltage of MAIN PCB CN76-3 Yellow ↔ 1
Gray shall be between 7V~12V.

Voltage of MAIN PCB CN76-5 Sky-blue ↔ 1
Gray shall be between 7V~12V.

The voltage of MAIN PCB
CN31#3

↔

CN76#1:shall be between 4.5V~1.0V

The voltage of MAIN PCB
CN30#9 ↔ CN76#1 : shall be between 4.5V~1.0V.

After separating MAIN PCB CN79 from PCB, the resistant value
between pink

↔

white wire shall be 72 ohm ±7%.

Check : 0 Ohm → heater short, ∞Ohm → wire / bimetal Open.

After separating MAIN PCB CN79 from PCB, the resistant value
between blue

↔

white wire shall be 72 ohm ±7%.

Check : 0 Ohm → heater short, ∞Ohm → wire / bimetal Open.

After separating MAIN PCB CN70,CN71 from PCB, resistant value
between CN70 brown ↔ CN71 Orange shall be 55(220) ohm ±
7%. (Resistant value is varied by input power)
0 Ohm : heater short, ∞ Ohm : wire / bimetal Open.

After separating MAIN PCB CN91from PCB, the resistant value
between Black ↔ brown wire shall be 145 ohm ± 7%.
0 Ohm : heater short, ∞ Ohm : wire / bimetal Open.

Voltage of MAIN PCB CN76-2 Black ↔ CN76-1 Gray : shall be
between 6V~12V.

58

4-1-4. Display function of Load condition

1) If Power Energy Saver Key + Lighting key are pressed simultaneously for 6 seconds during normal
operation, the temperature setting display of fresh food and freezer compartments will blink ALL ON/OFF
with 0.5 for 2 seconds.

2) At this moment, If Fridge Key after Energy Saver Key + Lighting Key is pressed, load condition display
mode will be returned with alarm. At LED all on state, only load condition display will blink ON/OFF with

0.5 seconds interval.

3) Load condition display mode shows the load that micom signal is outputting.
However, It means that micom signal is outputting, it does not mean whether load is operating or not.
That is to say that though load operation is displayed, load could not be operated by actual load error or
PCB relay error etc. (This function would be applied at A/S.)

4) Load condition display function will maintain for 30 seconds and then normal condition will be returned
automatically.

5) Load condition display is as below.

TROUBLESHOOTING

①

②

①

① If Energy Saver Key + Lighting key are pressed simultaneously for 6 seconds, ALL ON/OFF will blink

with 0.5interval for 2 seconds.

② If take the finger off from above keys and press Fridge, load condition mode will be started.

F-1

F-10

R-1

R-10

59

TROUBLESHOOTING

4-1-5. Exhibition mode setting function

1) If Energy Saver Key + Freezer are pressed simultaneously for 3 seconds during normal operation,
Exhibition mode will be started with buzzer sound(ding-dong).

2) If above Energy Saver Key + Freezer Key are pressed one more time, Exhibitoin mode will be canceled.

3) If Exhibition mode is selected, blinks "OF-OF" on the temperature setting display of . The panel and it
indicates the refrigerator has entered the Cooling Off mode.

4) During Exhibition mode, if fresh food and freezer compartments sensors are higher than 149℉(65℃).
Exhibition will be canceled automatically and freezing operation will be returned.
(There is no buzzer sound when the Exhibition mode is canceled by the temperature.)

5) Operation contents of Exhibition Mode

- Display, Fan motor and etc operate normally, not to operate compressor only.

- Defrost is not operated. (including french heater)

- Display function of the initial real temperature is finished.

- Under the condition of Exhibition mode, Exhibition mode will be operated when Power On after Power

OFF.

①

①

① If Energy Saver Key + Freezer Key are pressed for 3 seconds, Exhibition mode will be started.

󳢬 Load mode Check list

Display LED

R-1-ⓐ
R-1-ⓑ
R-1-ⓒ
R-1-ⓓ
R-1-ⓔ
R-1-ⓕ

F-1-ⓔ,ⓕ ALL LED Off

R1-ⓖ
F-1-ⓐ
F-1-ⓑ
F-1-ⓒ
F-1-ⓓ

R-10-ⓔ
R-10-ⓕ

F-1-ⓖ

F-10-ⓐ
F-10-ⓓ

F-10-ⓔ
R-10-ⓖ
R-10-ⓐ

F-10-ⓑ
R-10-ⓑ
R-10-ⓕ

Operation contents
When FF compartment FAN operates with high speed, applicable LED ON
When FF compartment FAN operates with low speed, applicable LED ON
When FF compartment defrost heater operates, LED ON
When refrigerator is plugged initially, LED ON
When ambient temperature is more than 93℉(34°C), LED ON
When ambient temperature is less than 72℉(22°C), LED ON
When ambient temperature is between 73℉(23°C) and 91℉(33°C)
LED ON at the display mode.
When COMP operates, applicable LED ON.
When FZ compartment FAN operates with high speed, applicable LED ON.
When FZ compartment FAN operates with low speed, applicable LED ON.
When FZ compartment defrost heater operates, LED ON
When compressor FAN operates with high speed, applicable LED ON.
When compressor FAN operates with low speed, applicable LED ON.
When Dispenser Heater operates, applicable LED ON.
When Water Tank Heater operates, applicable LED ON.
When Ice Room-FAN operates with high speed, applicable LED ON.
When Ice Room-FAN operates with low speed, applicable LED ON.
When French heater operates, applicable LED ON
When damper open, applicable LED ON
When the F-valve open, LED ON
When the R-valve open, LED ON
When Ice-Pipe Heater operates, applicable LED ON

Display contents
R-FAN High
R-FAN Low
R-DEF Heater
Start Mode
Overload condition
Low temperature condition
Normal Condition
Exhibition Mode
COMP.
F-FAN High
F-FAN Low
F-DEF Heater
C-FAN High
C-FAN Low
Dispenser Heater
Water Tank Heater
Ice Room-FAN High
Ice Room-FAN Low
French Heater
Pantry Room Damper Open
F-Valve Open
R-Valve Open
Ice-Pipe Heater

60

4-1-6. Option setting function

● If Freezer Key+ lighting Key are pressed simultaneously for 12 seconds during normal operation, fresh
food and freezer compartments temperature display will be changed to option setting mode.

● If the display changes to option setting mode, all displays will be off except freezer and fridge

compartments temperature display as below.
(Fresh food and freezer compartments case will be explained only because all options are operated with
the same method according to the option table.)

TROUBLESHOOTING

①

①

① If Freezer Key+ lighting Key are pressed simultaneously for 12 seconds, option setting mode will

be started.

KEY operation method for changing to option mode

Code Up

Code Reference Value

Reference

Value Up

Code Down Reference Value Down

KEY control method after converting to option mode

󳢬 Key control in option mode

Energy Saver Key

Freezer Key
Lighting key

Fridge key

Code Down key

Code Up key

Reference Value down key

Reference Value Up key

61

1) For example, if you want to change freezer compartment standard temperature to -4℉(-2°C) by

operating option, do as below. This function is for changing the standard temperature.
In -2℉(-19°C) of current temperature of freezer compartment, if you make the temperature lower to -4℉
(-2°C) by the option, the standard temperature would be controlled -6℉(-21°C)
Therefore, if you change the setting of temperature option to -2℉(-19°C) on the panel, the appliance will
be operated with -6℉(-21°C). It means that standard temperature is controlled -4℉(-2°C) less than
setting temperature in the display.

2) After changing to the option mode, fresh food compartment "0" , freezer compartment "0" will be

displayed. ( Basically fresh food compartment "0", freezer "0" would be set at shipping process, but
setting value could be changed for the purpose of improving product at mass producing process.)

- If fresh food compartment "0" shows only, temperature reference value of freezer compartment will be
set and current freezer compartment temperature code will be displayed on the freezer temperature
display.

3) If freezer compartment "4" is set as below freezer compartment code after fresh food compartment "0 is
set, standard temperature of freezer compartment will be lower than -4℉(-2.0°C).
(Refer to the picture "changing the freezer compartment temperature")

4) Option changing method as above is the same as all RFG23** model.

5) By the same method as above, it is possible to control the fresh food compartment temperature, water
supply, ice-maker harvest temperature/time, defrost return time, hysteresis by temperature, notch gap by
temperature etc.

6) Option function is set in the EEPROM at shipping process in the factory.
You would better not to change the option of your own.
Completing the setting is that option function return to normal display after 20 seconds.
Do not turn off the appliance before returning to the normal display mode.

: If you wait for 20 seconds after completing the setting, MICOM will save the setting value to the EEPROM

and normal display will be returned and the option setting mode will be canceled.

TROUBLESHOOTING

Reference ValueCode

Reference ValueCode

Basically, all the data in option has cleared from the factory.
Therefore, almost all setting value are "0".
But, some setting values could be changed for the purpose of improving performmance.
You need to check the product manual and/or specification.

NOTE

Option setting function exists in the other items.
We will skip the explanation of the other functions by the option because it is associated
with refrigerator control function and is not needed at SERVICE.
(Please do not set the other options except above SERVICE Manual.)

NOTE

62

Reference ValueCode

Reference ValueCode

TROUBLESHOOTING

4-1-7. Option TABLE

1) Temperature changing table of freezer compartment

ex) If you want to change the freezer standard temperature to

-4℉(-2°C)

Set item Freezer Temp Shift
MODEL RFG23*****

Fridge Room 7-SEG

0

Setting value

Temp.

compensation

0
1
2
3
4
5
6
7
8

9
10
11
12
13
14
15

0℉(0.0℃)

-1℉(-0.5℃)

-2℉(-1.0℃)

-3℉(-1.5℃)

-4℉(-2.0℃)

-5℉(-2.5℃)

-6℉(-3.0℃)

-7℉(-3.5℃)
+1℉(+0.5℃)
+2℉(+1.0℃)
+3℉(+1.5℃)
+4℉(+2.0℃)
+5℉(+2.5℃)
+6℉(+3.0℃)
+7℉(+3.5℃)
+8℉(+4.0℃)

FZ

compartment

Code

ex) If you want to change the

freezer compartment
standard temperature to
4℉(2°C)

Setting value

Temp.

compensation

0
1
2
3
4
5
6
7
8

9
10
11
12
13
14
15

0℉(0.0℃)

-1℉(-0.5℃)

-2℉(-1.0℃)

-3℉(-1.5℃)

-4℉(-2.0℃)

-5℉(-2.5℃)

-6℉(-3.0℃)

-7℉(-3.5℃)
+1℉(+0.5℃)
+2℉(+1.0℃)
+3℉(+1.5℃)
+4℉(+2.0℃)
+5℉(+2.5℃)
+6℉(+3.0℃)
+7℉(+3.5℃)
+8℉(+4.0℃)

FZ

compartment

Code

Reference

Value

2) Temperature changing table of fresh food compartment

Set item Freezer Temp Shift
MODEL RFG23*****

Fridge Room 7-SEG

1

Reference

Value

63

Reference ValueCode

Reference ValueCode

TROUBLESHOOTING

3) Temperature changing table of ICE ROOM compartment .

ex) If you want to change the

freezer compartment
standard temperature to

10.4℉(-12℃).

Set item ICE ROOM Temp shift
MODEL RFG23*****

Fridge Room 7-SEG

20

Setting value

Temp.

compensation

0
1
2
3
4
5
6
7

8.6℉(-13℃)

6.8℉(-14℃)

5℉(-15℃)

3.2℉(-16℃)

1.4℉(-17℃)

-0.4℉(-18℃)

-2.2℉(-19℃)

10.4℉(-12℃)

FZ

compartment

Code

ex) If you want to change the

freezer compartment
standard temperature to
4℉(2°C).

Setting value

Temp.

compensation

0
1
2
3
4
5
6
7
8

9
10
11
12
13
14
15

0℉(0.0℃)

-1℉(-0.5℃)

-2℉(-1.0℃)

-3℉(-1.5℃)

-4℉(-2.0℃)

-5℉(-2.5℃)

-6℉(-3.0℃)

-7℉(-3.5℃)
+1℉(+0.5℃)
+2℉(+1.0℃)
+3℉(+1.5℃)
+4℉(+2.0℃)
+5℉(+2.5℃)
+6℉(+3.0℃)
+7℉(+3.5℃)
+8℉(+4.0℃)

FZ

compartment

Code

Reference

Value

4) Temperature changing table of Pantry Room compartment

- Could change the temperature of Pantry Room in fresh food compartment.

Set item PANTRY ROOM Temp shift
MODEL RFG23*****

Fridge Room 7-SEG

33

Reference

Value

64

TROUBLESHOOTING

4-2) Diagnostic method according to the trouble symptom(Flow Chart)

DATA1.Temperature table
Resistance value and MICOM port voltage of sensor according to the temperature.
SENSOR CHIP : PX41C, 502AT// 103**(ICE MAKER SENSOR(MOLD))//FULL UP ,20K ohm used.

(The survey of resistance is nearly twice than below data.)

-50

-49

-48

-47

-46

-45

-44

-43

-42

-41

-40

-39

-38

-37

-36

-35

-34

-33

-32

-31

-30

-29

-28

-27

-26

-25

-24

-23

-22

-21

-20

-19

-18

-17

-16

-15

-14

-13

-12

-11

-10

-9

-8

-7

-6

-58

-56.2

-54.4

-52.6

-50.8

-49

-47.2

-45.4

-43.6

-41.8

-40

-38.2

-36.4

-34.6

-32.8

-31

-29.2

-27.4

-25.6

-23.8

-22

-20.2

-18.4

-16.6

-14.8

-13

-11.2

-9.4

-7.6

-5.8

-4

-2.2

-0.4

1.4

3.2
5

6.8

8.6

10.4

12.2
14

15.8

17.6

19.4

21.2

4.694

4.677

4.659

4.641

4.622

4.602

4.581

4.560

4.537

4.514

4.490

4.465

4.439

4.412

4.385

4.356

4.326

4.296

4.264

4.232

4.199

4.165

4.129

4.093

4.056

4.018

3.980

3.940

3.899

3.858

3.816

3.773

3.729

3.685

3.640

3.594

3.548

3.501

3.453

3.405

3.356

3.307

3.258

3.208

3.158

153319
144794
136798
129294
122248
115631
109413
103569

98073
92903
88037
83456
79142
75077
71246
67634
64227
61012
57977
55112
52406
49848
47431
45146
42984
40938
39002
37169
35433
33788
32230
30752
29350
28021
26760
25562
24425
23345
22320
21345
20418
19537
18698
17901
17142

℃℉

Voltage

Resistance

-5

-4

-3

-2

-1
0
1
2
3
4
5
6
7
8
9

10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39

23

24.8

26.6

28.4

30.2
32

33.8

35.6

37.4

39.2
41

42.8

44.6

46.4

48.2
50

51.8

53.6

55.4

57.2
59

60.8

62.6

64.4

66.2
68

69.8

71.6

73.4

75.2
77

78.8

80.6

82.4

84.2
86

87.8

89.6

91.4

93.2
95

96.8

98.6

100.4

102.2

3.107

3.057

3.006

2.955

2.904

2.853

2.802

2.751

2.700

2.649

2.599

2.548

2.498

2.449

2.399

2.350

2.301

2.253

2.205

2.158

2.111

2.064

2.019

1.974

1.929

1.885

1.842

1.799

1.757

1.716

1.675

1.636

1.596

1.558

1.520

1.483

1.447

1.412

1.377

1.343

1.309

1.277

1.253

1.213

1.183

16419
15731
15076
14452
13857
13290
12749
12233
11741
11271
10823
10395

9986
9596
9223
8867
8526
8200
7888
7590
7305
7032
6771
6521
6281
6052
5832
5621
5419
5225
5039
4861
4690
4526
4369
4218
4072
3933
3799
3670
3547
3428
3344
3204
3098

℃℉

Voltage

Resistance

40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84

104

105.8

107.6

109.4

111.2
113

114.8

116.6

118.4

120.2
122

123.8

125.6

127.4

129.2
131

132.8

134.6

136.4

138.2
140

141.8

143.6

145.4

147.2
149

150.8

152.6

154.4

156.2
158

159.8

161.6

163.4

165.2
167

168.8

170.6

172.4

174.2
176

177.8

179.6

181.4

183.2

1.153

1.124

1.095

1.068

1.040

1.014

0.988

0.963

0.938

0.914

0.891

0.868

0.846

0.824

0.803

0.783

0.762

0.743

0.724

0.706

0.688

0.670

0.653

0.636

0.620

0.604

0.589

0.574

0.560

0.546

0.532

0.519

0.506

0.493

0.481

0.469

0.457

0.446

0.435

0.424

0.414

0.404

0.394

0.384

0.375

2997
2899
2805
2714
2627
2543
2462
2384
2309
2237
2167
2100
2036
1973
1913
1855
1799
1745
1693
1642
1594
1547
1502
1458
1416
1375
1335
1297
1260
1225
1190
1157
1125
1093
1063
1034
1006

978
952
926
902
877
854
832
810

℃℉

Voltage

Resistance

65

TROUBLESHOOTING

- The error of sensor will be displayed on the front of display.
When the error of sensor is detected at initial power ON, the appliance will operated by the
emergency mode and display of abnormal sensor part will blink.

- The appliance will not stop operating when the error of sensor is detected during operation of the
appliance.
But normal freezing might be not operated if the appliance is operated by the emergency operation
mode. You would better to check the appliance according to the self-diagnosis of the manual.

4-2-1. If the trouble is detected by self-diagnosis

1) If ICE Maker(R) Sensor has troubled

Bad contact of connector/ insert correctly

Is MAIN PCB Connector

CN30 inserted correctly?

Is ICE Maker(R) Sensor

unit normal?

Is the voltage between

MAIN PCB Connector CN30#"7"(Brown) and

REG1, HEAT SINK normal?

Is input voltage of IC01

MICOM #75 normal?

Start

NO

YES

YES

YES

YES

Replace the temperature sensor

NO

Check the contact of PCB & Wire

Terminal correctly.

NO(0.6V > Measurement < 4.6V)

Check the iced-solder, solder bridging,

disturbed solder.

Replace the PCB

NO

No trouble with PCB and temperature sensor.

Recheck the bad contact of the connection.

** Measuring point of resistance value according to

Sensor **
ICE MAKER(R) : CN30#7 ↔CN76#1 measuring resistance value
** 0Ω: Short trouble / ∞Ω: Open trouble

Sensor MICOM/Connector number

Voltage measured between 4.6V ~ 0.6V.

Measuring voltage of IC01 MICOM #75,
CN30-"7"(Brown) and REG1, HEAT SINK from
PCB typical Ground part are similar.
→ Check the measure on the SENSOR MARKING #4(R312)

due to the SMD MICOM

☞ Checking Method of ICE MAKER(R) Senser resistance CN30

#7(Brown)

↔

CN76 #1"(Gray)

- Compare the temperature table after the measure.

DATA1.

Temperature table

ERROR Code

Refer to circuit diagram in the manual

ICE
Maker(R)

Connector CN30-"7"(Brown) and
REG1 HEAT-SINK PCB common Ground

☞ Checking method of ICE Maker(R) Sensor voltage

- Measure the voltage of Sensor Check Point #4(IC01 MICOM #75) or
CN30#7(Brown) ↔ REG1, HEAT SINK.

- Compare the temperature table after the measure. Measuring voltage
of CN30#4(Brown) ↔ REG1, HEAT SINK are below.

typical PCB Ground
REG1 HEAT-SINK

TROUBLESHOOTING

2) If ICE Maker(F) Sensor has troubled(RFG238 MODEL)

Bad contact of connector/ insert correctly

Is MAIN PCB

Connector CN90 inserted

correctly?

Is ICE Maker(F)

sensor unit normal?

Is the voltage between

MAIN PCB Connector CN90#"4"(White)

and REG1, HEAT SINK normal?

Is input voltage of

IC01 MICOM #78 normal?

Start

NO

YES

YES

YES

YES

Replace the ICE Maker

NO

Check the contact of PCB & Wire

Terminal correctly.

NO(0.6V > Measurement < 4.6V)

Check the iced-solder, solder bridging,

disturbed solder.

Replace the PCB

※ This refrigerator has Dual Ice Maker,

so controlled two Ice Makers.

NO

No trouble with PCB and temperature sensor.

Recheck the bad contact of the connection.

** Measuring point of resistance value according to Sensor **
ICE MAKER(F) : CN90 #3 or #8 ↔ #4 measuring

resistance value

** 0Ω: Short trouble / ∞Ω: Open trouble

Sensor MICOM/Connector number

Voltage measured between 4.6V ~ 0.6V.

Measuring voltage of IC01 MICOM #78,
CN90#4(White) and REG1, HEAT SINK from PCB

typical Ground part are similar.

→ Check the measure on the SENSOR MARKING #9(R901)

due to the SMD MICOM.

☞ Checking Method of ICE MAKER(R) Senser

resistance CN90 #3(white) or #8(Sky_blue)

↔

#4(White)

- Compare the temperature table after the measure.

DATA1.

Temperature table

ERROR Code

Refer to circuit diagram in the manual

ICE

Maker(F)

Connector CN90-#4(White) and REG1

HEAT-SINK PCB common Ground

☞ Checking method of ICE Maker(F) Sensor voltage

- Measure the voltage of Sensor Check Point #9(IC01 MICOM

#78) or CN90#4(white) ↔ REG1, HEAT SINK.

- Compare the temperature table after the measure.

Measuring voltage of CN90#4(White) ↔ REG1, HEAT SINK
are below.

typical PCB Ground
REG1 HEAT-SINK

66

67

TROUBLESHOOTING

3) If R Sensor has trouble

Bad contact of connector/ insert correctly

Is MAIN PCB

Connector CN30 and CN76 inserted

correctly?

Is R Sensor

unit normal?

Is the voltage between

MAIN PCB Connector CN30#6(White) and

REG1 HEAT-SINK normal?

Is the input voltage of

IC01 MICOM #76 normal?

Start

NO

YES

YES

YES

YES

Replace the temperature sensor

NO

Check the contact of PCB & Wire

Terminal correctly.

NO(0.6V > Measurement < 4.6V)

Check the iced-solder, solder bridging,

disturbed solder.

Replace the PCB

NO

No trouble with PCB and temperature sensor.

Recheck the bad contact of the connection.

** Measuring point of resistance value according to

Sensor **
R : CN30#6 ↔ CN76#1 measuring resistance value
** 0Ω: Short trouble / ∞Ω: Open trouble

Sensor MICOM/Connector number

Voltage measured between 4.6V ~ 0.6V.

Measuring voltage IC01 MICOM #76,
CN30#6(White) and REG1, HEAT SINK
from PCB typical Ground part are similar.
→ Check the measure on the SENSOR MARKING #3(R311)

due to the SMD MICOM

☞ Checking method of R Sensor resistance

CN30#6(White) ↔ CN76#1(Gray) Compare the
temperature table after measurment.

DATA1.

Temperature table

ERROR Code

Refer to circuit diagram in the manual

R

Connector CN30#6(White) to
REG1 HEAT-SINK PCB typical Ground

☞ Checking method of R Sensor resistance

- Measure the voltage of Sensor Check Point #3(IC01 MICOM
#76) on PCB or CN30#6(White) ↔ REG1, HEAT SINK

- Compare the temperature table after measurement.
Measuring voltage of CN30#6(White) ↔REG1, HEAT SINK
are as below.

Typical PCB Ground
REG1, HEAT SINK

68

TROUBLESHOOTING

4) If R DEF Sensor has trouble

Bad contact of connector/ insert correctly

Is MAIN PCB

Connector CN30 and CN76 inserted

correctly?

Is R DEF Sensor

unit normal?

Is the input voltage between

MAIN PCB Connector CN30#8(Skyblue)

and REG1, HEAT SINK normal?

Is the input voltage of IC01

MICOM # 74 normal?

Start

NO

YES

YES

YES

YES

Replace the temperature sensor

NO

Check the contact of PCB & Wire

Terminal correctly.

NO(0.6V > Measurement < 4.6V)

Check the iced-solder,

solder bridging, disturbed solder.

Replace the PCB

NO

No trouble with PCB and temperature sensor.

Recheck the bad contact of the connection.

** Measuring point of resistance value according to

Sensor **
R-DEF : CN30#8 ↔ CN76#1 measuring
resistance value
** 0Ω: Short trouble / ∞Ω: Open trouble

Sensor MICOM/Connector Number

Voltage measured between 4.6V ~ 0.6V.

Measuring voltage of IC01 MICOM #74,
CN30#8(Sky-blue) and REG1, HEAT SINK from
PCB typical Ground part are similar.
→ Check the measure on the SENSOR MARKING #5(R313)

due to the SMD MICOM

☞ Checking method of R Sensor resistance

CN30#8(Sky-blue) ↔ CN76#1(Gray)

- Compare the temperature table after
measurement.

DATA1.

Temperature table

ERROR Code

Refer to circuit diagram in the manual

R DEF

Connector CN30-"8"(Sky-blue) and
REG1, HEAT SINK PCB common Ground

☞ Checking method of R DEF Sensor resistance

- Measure the voltage of Sensor Check Point #5(IC01 MICOM #74) on PCB or
CN30#8(Sky-blue)↔REG1, HEAT SINK

- Compare the temperature table after measurement.

Measuring voltage of CN30#8(Sky-blue) ↔ REG1, HEAT SINK are as below.

Typical PCB Ground
REG1, HEAT SINK

Start

YES

YES

YES

69

TROUBLESHOOTING

5) If Ambient Sensor has trouble

Bad contact of connector/ insert correctly

Is MAIN PCB

Connector CN31 inserted

correctly?

Is Ambient Sensor

unit normal?

Is the voltage between

MAIN PCB Connector CN31#1(Yellow)

and REG1, HEAT SINK normal?

Is the input voltage of

IC01 MICOM #72 normal?

Start

NO

YES

YES

YES

YES

Replace the temperature sensor

NO

Check the contact of PCB & Wire

Terminal correctly.

NO(0.6V > Measurement < 4.6V)

Check the iced-solder,

solder bridging, disturbed solder.

Replace the PCB

NO

No trouble with PCB and temperature sensor

Recheck the bad contact of the connection

** Measuring point of resistance value according to

Sensor **
Ambient : CN31#1 ↔ #4 measuring resistance value
** Placed in the right top table of upper hinge.
** 0Ω: Short trouble / ∞Ω: Open trouble

Sensor MICOM/Connector number

Voltage measured between 4.6V ~ 0.6V.

Measuring voltage of IC01 MICOM #72,
CN31#1(Yellow) and REG1, HEAT SINK from
PCB typical Ground part are similar.
→ Check the measure on the SENSOR MARKING #7(R307)

due to the SMD MICOM

☞ Checking method of Ambient Sensor resistance

CN31#1(Yellow) ↔ #4(Yellow)

- Compare the temperature table after
measurement.

DATA1.

Temperature table

ERROR Code

Refer to circuit diagram in the manual

Ambient

Connector CN31#1(Yellow) to
REG1, HEAT-SINK PCB typical Ground

☞ Checking method of Ambient Sensor voltage

- Measure the voltage of Sensor Check Point #7(IC01 MICOM #72)
on PCB or CN31#1(Yellow) ↔ REG1, HEAT SINK

- Compare the temperature table after measurement.

Measuring voltage of CN31#1(Yellow) ↔ REG1, HEAT SINK are as
below

Typical PCB Ground
REG1 Heater Sink

Start

YES

YES

YES

70

TROUBLESHOOTING

6) If F Sensor has trouble

Bad contact of connector/ insert correctly

Are MAIN PCB

Connector CN30 and CN76

inserted correctly?

Is F Sensor

unit normal?

Is the voltage between

MAIN PCB Connector CN30#3(Red) and

REG1, HEAT SINK normal?

Is the input voltage of

IC01 MICOM #81 normal?

Start

NO

YES

YES

YES

YES

Replace temperature sensor

NO

Check the contact of PCB & Wire

Terminal correctly.

NO(0.6V > Measurement < 4.6V)

Check the iced-solder,

solder bridging, disturbed solder.

Replace the PCB

NO

No trouble with PCB and temperature sensor

Recheck the bad contact of the connection

** Measuring point of resistance value according to

Sensor **
F : CN30#3 ↔ CN76#1 measuring resistance value
** 0Ω: Short trouble / ∞Ω: Open trouble

Sensor MICOM/Connector number

Voltage measured between 4.6V ~ 0.6V.

Measuring voltage of IC01 MICOM #81,
CN30#3(Red) and REG1, HEAT SINK from
PCB typical Ground part are similar.
→ Check the measure on the SENSOR MARKING #1(R309)

due to the SMD MICOM

☞ Checking method of F Sensor resistance

CN30#3(Red) ↔ CN76#1(Gray)

- Compare the temperature table after measurement.

DATA1.

Temperature table

ERROR Code

Refer to circuit diagram in the manual

F

Connector CN30#3(Red) to
REG1, HEAT SINK PCB typical Ground

☞ Checking method of F Sensor voltage

- Measure the voltage of Sensor Check Point #1(IC01 MICOM #81) on
PCB or CN30#3(Red) ↔ REG1, HEAT SINK

- Compare the temperature table after measurement.

Measuring voltage of CN30#3(Red) ↔ REG1, HEAT SINK are as

Typical PCB Ground
REG1 Heater Sink

Start

YES

YES

YES

71

TROUBLESHOOTING

7) If F DEF Sensor has trouble

Bad contact of connector/ insert correctly

Are MAIN PCB

Connector CN30 and

CN76 insert correctly?

Is F DEF Sensor

unit normal?

Is the voltage between

MAIN PCB Connector CN30#4(Orange) and

REG1, HEAT SINK normal?

Is the input voltage of

IC01 MICOM #77 normal?

Start

NO

YES

YES

YES

YES

Replace temperature sensor

NO

Check the contact of PCB & Wire

Terminal correctly.

NO(0.6V > Measurement < 4.6V)

Check the iced-solder,

solder bridging, disturbed solder.

Replace the PCB

NO

No trouble with PCB and temperature sensor.

Recheck the bad contact of the connection.

** Measuring point of resistance value according to

Sensor **

F-DEF : CN30#4 ↔ CN76#1 measuring resistance

value

** 0Ω: Short trouble / ∞Ω: Open trouble

Sensor MICOM/Connector number

Voltage measured between 4.6V ~ 0.6V.

Measuring voltage of IC01 MICOM #77,
CN30#4(Orange) and REG1, HEAT SINK from
PCB typical Ground part are similar.
→ Check the measure on the SENSOR MARKING #2(R310)

due to the SMD MICOM

☞ Checking method of F DEF Sensor resistance

CN30#4(Orange) ↔ CN76#1(Gray)

- Compare the temperature table after measurement.

DATA1.

Temperature table

ERROR Code

Refer to circuit diagram in the manual

F DEF

Connector CN30#4(Orange) to
REG1, HEAT SINK PCB typical Ground

☞ Checking method of F DEF Sensor voltage

- Measure the voltage of Sensor Check Point #2(IC01 MICOM

#77) on PCB or CN30#4(Orange) ↔ REG1, HEAT SINK

- Compare the temperature table after measurement.

Measuring voltage of CN30#4(Orange) ↔ REG1, HEAT SINK are

Typical PCB Ground
REG1, Heater Sink

Start

YES

YES

YES

72

TROUBLESHOOTING

8) If Ice Room Sensor has trouble

Bad contact of connector/ insert correctly

Is MAIN PCB

Connector CN31 and CN76 inserted

correctly?

Is Ice Room Sensor

unit normal?

Is the voltage between

MAIN PCB Connector CN31-”3”(Orange)

and REG1, HEAT SINK normal?

Is the input voltage of

IC01 MICOM #71 normal?

Start

NO

YES

YES

YES

YES

Replace temperature sensor

NO

Check the contact of PCB & Wire

Terminal correctly.

NO(0.6V > Measurement < 4.6V)

Check the iced-solder,

solder bridging, disturbed solder.

Replace the PCB

NO

No trouble with PCB and temperature sensor.

Check the bad connections.

** Measuring point of resistance value according to

Sensor **

Ambient : CN32#3 ↔ CN76#1 Measure the resistance

value

** 0Ω: Short trouble / ∞Ω: Open trouble

Sensor MICOM/Connector number

Voltage measured between 4.6V ~ 0.6V.

Measuring voltage of IC01 MICOM #71,
CN31-”3”(Orange) and REG1, HEAT SINK from
typical PCB Ground are similar.
→ Check the measure on the SENSOR MARKING #8(R308)

due to the SMD MICOM

☞ Checking Mehod of Ice Room Sensor voltage

CN31-”3”(Orange) ↔ CN76-”1” (Gray)

- Compare with the temperature table after
measurement.

DATA1.

Temperature table

ERROR Code

Refer to the circuit diagram in this manual

Ice Room

Connector CN31-”3”(Orange) and REG1,
HEAT SINK from typical PCB Ground

☞ Checking Method of Ice Room Sensor Voltage

- Measure the voltage of sensor checking point #8(IC01 MICOM #71) on
PCB or CN31-”3” (Orange) ↔ REG1, HEAT SINK

- Compare with the temperature table after measurement.
Measured voltage of CN31-”3” (Orange) ↔ REG1, HEAT SINK are as
below

Typical PCB Ground
REG1, HEAT SINK

Start

YES

YES

YES

73

TROUBLESHOOTING

9) If Pantry Sensor has trouble

Bad contact of connector/ insert correctly

Is MAIN PCB

Connector CN30 and CN76 insert

correctly?

Is Pantry Sensor

normal?

Is the voltage between

MAIN PCB Connector CN30#9(Whiteblack)

and REG1, HEAT SINK normal?

Is the input voltage of IC01

MICOM Pin# 73 normal?

Start

NO

YES

YES

YES

YES

Replace temperature sensor

NO

Check the contact of PCB & Wire

Terminal correctly.

NO(0.6V > Measurement < 4.6V)

Check the iced-solder,

solder bridging, disturbed solder.

Replace the PCB

NO

No trouble with PCB and temperature sensor.

Recheck the bad contact of the connection.

** Measuring point of resistance value according to

Sensor **
Pantry : CN30#9 ↔ CN76 #1 measuring resistance value
** 0Ω: Short trouble / ∞Ω: Open trouble

Sensor MICOM/Connector number

Voltage measured between 4.6V ~ 0.6V.

Measuring voltage of IC01 MICOM #73,
CN30#9(White-black) and REG1, HEAT SINK
from PCB typical Ground part are similar.
→ Check the measure on the SENSOR MARKING #6(R314)

due to the SMD MICOM

☞ Checking method of Pantry Sensor resistance

CN30#9(White-black) ↔ CN76#1(Gray)

- Compare the temperature table after measurement.

DATA1.

Temperature table

ERROR Code

Refer to circuit diagram in the manual

Pantry

Connector CN30#9(White-black) to
REG1 HEAT SINK PCB typical Ground

☞ Checking method of Pantry Sensor voltage

- Measuring voltage of Sensor Check Point #6(IC01 MICOM #73) on
PCB or CN30#9(White-black) ↔ REG1, HEAT SINK

- Compare the temperature table after measurement.

Measuring voltage of CN30#9(white-black)↔REG1, HEAT SINK are

Typical PCB Ground
REG1 Heater Sink

Start

YES

YES

YES

74

TROUBLESHOOTING

10) If Pantry Room Damper Heater has trouble

Replace Damper

Is Damper Heater

normal?(about145ohm)

Is MAIN PCB connector

(CN91) inserted correctly?

Is the input voltage of

IC02 MICOM #42 normal?

Start

NO

YES

YES

YES

Bad contact of connector/ insert correctly

NO

1) Recheck the wire

2) Replace PCB MAIN

NO

Normal(recheck)

Measure the resistance

between ①-② after

CN91 connector open 145ohm ± 7%

ERROR Code

☞ Checking method of Pantry Room Damper

resistance CN91#1(Black) ↔ #2(Brown)

** ∞Ω: Open(wire disconnection, heater

disconnection) trouble / 0Ω: Short trouble

Start

YES

YES

YES

Initial

power On

Damper

heater off

Damper

heater On

3.5V ~

4.8V

MICOM

#42

condition

3.5V ~

4.8V

0V

※ It could changed HEATER capacity by operation.

75

TROUBLESHOOTING

11) If Tank Water Heater has trouble

1) Wire connector

2) Replace Heater

Is MAIN PCB connector

(CN79) inserted correctly?

Is the input voltage of

IC01 MICOM #6 normal?

Start

NO

YES

YES

YES

Bad contact of connector/ insert correctly

NO

1) Recheck the wire

2) Replace PCB MAIN

NO

Normal(recheck)

Measure the resistance
between ⑥(3)-⑩(7) after

CN79 connector open 72ohm ± 7%

ERROR Code

☞ Checking method of Tank Water Heater

resistance CN79#6(Pink) ↔ #10(White)

** ∞Ω: Open(wire disconnection, heater

disconnection) trouble / 0Ω: Short trouble

Start

YES

YES

YES

Initial

power On

Heater off

Working

heater

3.5V ~

4.8V

MICOM

#6

condition

3.5V ~

4.8V

0V

Is Tank Water Heater

normal?(about72ohm)

※ It could changed HEATER capacity by operation

76

TROUBLESHOOTING

- The refrigerator of this model has BLDC FAN motor. BLDC motor is driven by DC 7~12V.

- On the normal condition of COMP ON, it operates together with F-FAN motor.
If door is opened and closed once at a high ambient temperature, it will be operated after 1 minute
delay.
Therefore, you are advised not to taken it for an error.

-. If there is a trouble, you should select the self-diagnostic function to check the trouble before power off.

4-2-2. IF FAN does not operate(F, R, C - FAN)

Start

Is COMPRESSOR ON ?

Door & MICOM State

Door

F FAN pulse voltage

CN76#7(Brown)

The voltage measured around 2~3V
with multi-meter though the voltage is
very weak because of pulse signal

☞ Display for checking the self-diagnostic function

R FAN ERROR

Typical PCB Ground

REG1 Heater Sink

F

MICOM

(#83)

Close

Open

5V(High)

0V(Low)

0V(Low)

5V(High)

R MICOM(#82)

Right and Left

Excute manualoperation.

If initial temperature of F Room

is under the 41℉(5℃), waitng

7 minutes and then activate.

FAN work normally

Repair the connection

of Door switch

Replace MAIN PCB

1) F-FAN 2) R-FAN 3) C-FAN

Typical PCB Ground
REG1 Heater Sink

Power on with about 7
minutes delay after power
OFF. (For preventing the
over load of compressor)

◆ Expected causes
① Check that if FAN-MOTOR has failure

itself.

② Check that if wiring connection has bad

contact.

③ Check the input of the fan motor rotation

pulse when motor fan operates.

CN76-7(F),8(R),9(C)will generate the pulse signal when motor rotates.
These signals will be inputted into MICOM.
Unless signals are not inputted during motor operating, will be ON 10
seconds after fan Off. But if signals are not still entered, the above operation
will restart four times more.
If signals are not entered continuously, the motor will be restarted after 10
seconds.
This function is effective when the normal operation of motor would be
restrained by foreign matters such as ice.

☞ Checking method of R,F,C FAN Motor voltage
The voltage between PCB typical Ground REG1 Heater Sink and
F FAN ; CN76#3(Yellow) shall be less than DC 7~12V.
R FAN ; CN76#4(Orange) shall be less than DC 7~12V.
C FAN ; CN76#5(Sky-blue) shall be less than DC 7~12V.

- Motor rpm could be changed by capability without previous.

Is the voltage between MAIN

PCB REG1 Heater Sink and CN76#3

(Yellow) around DC7~12V?

Is the voltage between MAIN

PCB REG1,Heater Sink and CN76#4

(Orange) around DC7~12V?

Is the voltage between MAIN

PCB REG1, HEAT SINK and

CN76#5(Sky -blue) around DC7~12V?

Is the external temperature above

66.2 ℉(19℃ )?

Recheck after 7 minutes
(Time could be delayed
depending on the
temperatures. If the
temperature is lower, It
may not operate : about
59℉ (below 15℃)

Is the voltage between MAIN
PCB REG1,Heater Sink and
CN30#2 (Purple) around 0V?

Is the voltage between MAIN

PCB REG1 Heater Sink and CN30#1

(Black) around 4.5~5V?

Does DC7~12V alternate with

below DC 2V between MAIN PCB REG1

Heater Sink and CN76 #3(Yellow)

Does DC7~12V alternate with below

DC 2V between MAIN PCB REG1 Heater

Sink and CN76#4(Orange)

Does DC7~12V alternate with below

DC 2V between MAIN PCB REG1 Heater

Sink and CN76#5(Sky-blue)

In initial power to appliance, the compressor
and fans of fresh food/ freezer, compressor
fan operate. If freezer temperature is
sensed of 41℉ by momentary power
failure, fans will operate after 5 minutes.

Reference

F FAN ERROR

C FAN ERROR

77

TROUBLESHOOTING

4-2-3. If ICE Room Fan does not operate

- This refrigerator has BLDC FAN motor. BLDC motor is driven by DC7~12V.

- When COMP ON, normally operates with F-FAN motor.

- If there is any trouble, you should select the self-diagnostic function to check the trouble before power off.

Start

Execute manual operation

No

Yes

Yes

No

Yes

Yes

No

No

Is COMPRESSOR ON ?

Is the Ice Room

temperature suitable for

the Fan working?

◆ Predicted Cause
① FAN-MOTOR troubles itself
② Bad wiring connections.
③ Wrong Input of the fan motor rotation pulse

Reference

CN76 #6 will generate the pulse signal when motor rotates.
These signals will be input into MICOM.
Unless signals are not input during motor operating, will be ON
10seconds after fan OFF. But if signals are not still taken, the
above operation will be retried four times more. If signals are not
taken continuously, the motor will be restarted after 10 minutes.
This function is against the case that motor movement would be
restrained by foreign matters like ice.

- When pressing the ICE TEST S/W for a certain period of time
(over 1.5sec), the function is accomplished. After beginning of
TEST mode, Ice maker heater turns on for initial 2 minutes, if the
ice making temperature is below 0℃.

- If it exceeds 0℃, Ice maker heater turns on for initial 30 seconds.

- After Ice maker heater turns on for 30 seconds, it turns off and
then Ice maker motor turns on.

- As the Ice maker motor turns on, TEST MODE COUNT operates.
(6 minutes count)

Condition

- Ambient temperature : 32℃/75%

- Notch : 2℉/38℉(-19.0℃/3.3℃)
Initial full of ice bucket capacity : 794 g, 58ea

Is the voltage between

MAIN PCB REG1 Heater Sink and

CN76-”2” (Black) around

DC7~12V?

Does DC7~12V alternate

with below DC2V between MAIN PCB REG1

Heater Sink and CN76-”2”(Black)?

FAN works normally

Operation

temperature/ready

Replace MAIN PCB

FAN pulse voltage

CN76-”6”(Pink)

Typical PCB Ground

REG1 Heater Sink

Ice Room control temperature

Ice ON

8.6℉(-13℃)

Ice OFF

26.6℉(-3℃)

The voltage is variable due to pulse
signal but measured about 2~3V with the
Multi-Meter.

☞ Display for checking the self-diagnostic function

Ice Room FAN ERROR

☞ Checking method of Ice Room FAN Motor Voltage with the voltage between typical

PCB Ground REG1 Heater Sink and Ice Room FAN ; CN76-”2”(Black) shall be less
than DC 6~12V.

- Additional check if resistance values are different after measurement.

Typical PCB Ground
REG1 Heater Sink

1) Ice Room - FAN

78

TROUBLESHOOTING

1. Water is automatically supplied to the Ice Maker depending on temperature & time condition and Ice Maker Dispenses
cubed or crushed ice.

2. Power is applied to the one end of wires. Be careful when disassembling and shall refer to its exploded diagram in any
case.

3. Ice Maker operation shall be checked after pressing the Ice Maker testing switch.
(Freezer Ice Maker) It is not possible to check when the power is disengaged.

4. We recommend that TWO PEOPLE check the PCB and Ice Maker because they are located at front and rear side each.

5. Be careful! The Ice Maker Heater can cause personal injury like burn.

6. Ice maker could operate not only genuine rotate but also reverse rotate, so it is not out of order that reverse rotate.

4-2-4. If Ice Maker does not operate

☞ Checking Method of ICE Maker Voltage
With typical PCB Ground REG1 Heater Sink and

1) Test Switch operation (press selected) : CN75-”5” (Black) shall be DC 0V.
Test Switch ready ; CN75-”5” (Black) shall be less than DC 5V.

☞ Checking Method of ICE Maker Voltage
With typical PCB Ground REG1 Heater Sink and

2) IC01 MICOM #111 voltage ; Ready(0V) → Rotate (4.9V) → Before
complete(4.9V) → Return(0V)
* MICOM #111 voltage is same as Connector CN50-”11”(Sky-Blue)

3) IC02 MICOM #38 voltage ; Ready(0V) → Rotate (0V) → Before
complete(4.9V) → Return(0V)
* MICOM #38 voltage is same as Connector CN90-”6”(Blue)

a)Test Switch operating

- When the refrigerator
operate, the voltage is
0V.

b)Test Switch ready

Typical PCB Ground
REG1 Heater Sink

Displays ERROR Code

Start

1) Replace the Ice Maker Kit

2) Check/Replace the Main PCB
input signal
(Micom IC01 Pin #05 - “0V”)

Does Ice Maker

rotate when pressing the Ice Maker

testing switch(over 1.5 sec)?

No

1) Check the wiring connections.

2) Replace Ice Maker Kit

3) Replace MAIN PCB

Is the input voltage of IC01

MICOM #38,#111 normal?

No

1) Replace the Water Valve
* Refer to the operation

condition of Water Valve

2) Replace the Main PCB

Is the water supplied in 6

minutes (After sensing ice bucket

fully)?

No

1) Repair the Ice Maker Sensor
* Refer to the solution “If Ice

Maker Sensor has trouble”

No trouble with PCB and temperature sensor,
Check the bad wiring connections.

Is the Ice Maker Sensor unit normal?

No

Operating Condition when motor rotates
Operating Status of Micom(IC01)

Heater operates differently according to the conditions.
Test Mode operation will be 30 sec.

Operation

5V
5V
5V

Ready

0V
0V
0V

CW Load (#56)
CCW Load (#57)
Heater Load (#67)

MICOM(IC02) Operation Status

#05

(Test Switch)

Operation5VReady

0V

State of Ice maker operation

Levelness sensinfg → water
supply → Motor reverse rotate
→ return to normal → normality

MICOM(IC01) Operation Status

#111

(Blade Ice Scoop)

#38

(Guide Ice Full)

Ready Rotation

Before

Complete

Returning

0V 4.9V 4.9V 0V

0V 0V 4.9V 0V

☞ Check the ICE Maker Heater & Motor Resistance

1) Measuring the Ice Maker Heater
resistance values

CN70-"11"(Gray) -"1"(Black)

Resistance value : 91(365)Ohm± 30% Resistance value : 200KOhm± 30%

CW: 13P-"11"(White) and CN70-"9"(Red)
CCW: 13P-"13"(Pink) and CN70-"9"(Red)

2) Measuring the Ice Maker Motor
resistance values

Yes

Yes

Yes

Yes

79

TROUBLESHOOTING

1. Water is automatically supplied to the Ice Maker depending on temperature & time condition and Ice
Maker Dispenses cubed or crushed ice.

2. Power is applied to the one end of wires. Be careful when disassembling and shall refer to its
exploded diagram in any case.

3. Ice Maker operation shall be checked after pressing the Ice Maker testing switch.
(Freezer Ice Maker) It is not possible to check when the power is disengaged.

4. We recommend that TWO PEOPLE check the PCB and Ice Maker because they are located at front
and rear side each.

4-2-5. If ICE MAKER(F) does not operate(RFG238 MODEL)

Is the checking location by

self sensing when initial Power ON?

Does ice

Maker Rotate when pressing the Ice Maker

testing switch?

Is the input voltage of IC01

MICOM #39 normal?

Is the water

supplied in 6 minutes(After sensing ice

bucket fully?

Is the ice Maker Sensor

unit normal?

Start

NO

YES

YES

YES

YES

NO

NO

1) Replace the Water Valve

* Refer to the operation condition of Water valve

1) Check the wiring connections

2) Check/Replace the Ice Maker kit.

3) Check/Replace the main PCB

1) Check the wiring connections

2) Check/Replace the Ice Maker kit.

NO

1) Repair the ice Maker
* Refer to the solution If ice Maker Sensor has

trouble.

1) Check/Replace the Ice Maker kit.

NO

No trouble with PCB and temperature sensor,

Check the bad wiring connections.

ERROR Code

☞ Checking Method of ICE Maker Voltage With typical PCB Ground REG1 Heater Sink and

1) Test Switch operation(press selected) ; CN90-"5"(Gray) shall be DC 0V.
Test Switch ready ; CN90-"5"(Gray) Shall be less than DC 5V.

☞ Checking Method of ICE Maker Voltage With typical PCB Ground REG1 Heater Sink and

2) IC01 MICOM #39 voltage ; Ready(0V) →Rotate(0V) →Before complete(5V) →Return(0V) →Ready(5V)
* MICOM #39 voltage is same as Connector CN90-"7"(Purple)

typical PCB Ground
REG1 HEAT-SINK

1) Test Switch operating 1) Test Switch ready

Micom(IC01) Operation Status

#37

(Test Switch)

Ready5VOperation

0V

Micom(IC01) Operation Status

#39

Ready

Rotation

Before

Complete

Returning

Ready

5V 0V 5V 0V 5V

80

TROUBLESHOOTING

- If defrost has trouble, select the self-diagnostic function to detect the error of defrost heater before
Power Off. (Check the function with the self-diagnostic function)

4-2-6. If defrost does not operate (F,R DEF Heater)

R DEF ERROR F DEF ERROR

Start

Are the all deforst

heater normal?

Check the bimetal, heater
disconnection, wiring connection etc.

Refer to self-diagnostic
function in the manual

Replace the
applicable sensor

manual operation for a certain time

Manual defrosting of fresh food

and freezer compartments

operate simultaneously.

Resistance value of sensor according to temperature

If you need the

temperature with detail,

refer to DATA1.

temperature

table

**Measuring point of resistance value according to sensor **
F-DEF : CN30#4 ↔ CN76#1 measuring resistance value
R-DEF : CN30#8 ↔ CN76#1 measuring resistance value
** 0Ω: Short trouble / ∞Ω: Open trouble

**Measuring point of resistance value according to heater**
F-DEF(Ice Duct parallel) : CN70#7(Brown) ↔ CN71#9
(Orange) measuring resistance value(55 ohm ± 7%)
R-DEF : CN70#5(White)↔CN71#9(Orange)
measuring resistance value(110 ohm ± 7%)
** 0Ω: Short trouble / ∞Ω: Open(bimetal, heater) trouble

86℉(30℃)
68℉(20℃)
50℉(10℃)

32℉(0℃)

14℉(-10℃)

-4℉(-20℃)

-22℉(-30℃)

4.22㏀

6.05㏀

8.87㏀

13.29㏀

20.42㏀

32.23㏀

52.41㏀

If Energy Saver + Fridge key are pressed
simultaneously for 8 seconds and select any key.
4thtest mode(manual defrosting will be operated).

Is the temperature of

defrost sensor lower

than 53.6℉(12°C)?

Is defrost sensor by

self-diagnostic normal?

Is power applied to

each defrost heaters?

Is connection terminal of

MAIN PCB part normal?

Recheck the applicable

sensor.

**Measuring point of resistance value according to sensor **
F-DEF : CN30#4 ↔ CN76#1 measuring resistance value
R-DEF : CN30#8 ↔ CN76#1 measuring resistance value
** 0V: Short trouble / 5V: Open trouble

Normal

Repair connection terminal

Reference If defrost sensor

temperatures of fresh food and
freezer compartments are higher
than 50℉(10℃), 53.6℉(12℃) by
the heating from heater, heating
would be finished and will return
to cooling operation after a pause.

Check bimetal, heater itself,

disconnection etc.

Replace failure Relay or

replace PCB ASS'Y

Does the system return

to cooling operation after

heating for specified time?

☞Checking method of F,R DEF Heater resistance value
F DEF ; CN70#7(Brown) ↔ CN71#9(Orange)
R DEF ; CN70#5(White) ↔ CN71#9(Orange)

- Recheck if resistance values are different after the test

1) F DEF Heater 2) R DEF Heater

81

TROUBLESHOOTING

4-2-7. If Power is not supplied

Caution

At the power of main PCB, the
AC115V power and a high-voltage
over DC 170V are occurred.Please
take care of yourself during repair
and measurement.

Check in SMPS PBA

Start

- Refer to the function and
reference parts in the manual
when check the MAIN PCB

Connect plug again,
check the plug loosening

Check the assembly and wire
connection

1) Replace FUSE AC 250V 2.0A

2) Replace PCB ASS’Y

Replace PCB ASS'Y

Replace PCB ASS'Y

1) Check REG1 (KA7805)

2) Replace PCB ASS'Y

1) Check assembly wire and repair

2) Replace Panel PCB

1) Solder again

2) Replace PCB MAIN

- Check MAIN PCB connection

- Check the connections between
cabinet and door

- Check the connections between
door and panel PCB

1) Check the contact of lead wire

2) Replace the applicable relay / PCB MAIN

1) Check PCB PATTERN and replace BD1

2) Replace PCB ASS'Y

Is the plug connected in?

Is power 115V applied to the

both terminals of SMPS PCB

CN70 #11-#9?

Is fuse on the SMPS

PCB down?

Is DC170V

applied to the both

terminals of BD1+,-

Is DC5.8V
applied between TOP
switch 246Y C and S?

Is 13V applied to the both

terminals of C107?

Is 5V applied to the both

terminals of C109?

Does Panel PCB

operate normally?

Is the load (i.e. Relay)

normal?

Is there any PCB

soldering, short,

breakage?

Normal(Recheck)

☞ Checking method of voltage

CN70 input ; CN70#9(Red) ↔ #11(Gray)
AC voltage

☞ Checking method of DC 2nd output voltage

REG1 input ; Regulator 7805 →same as C107
terminals.
DC 13.0V ± 0.8V

☞ Checking method of DC 2nd output voltage

REG1 output ; Regulator 7805 → same as C109
terminals.
DC 5V ± 0.5V

TROUBLESHOOTING

4-2-8. If compressor does not operate

Refer to test function

in the manual

☞ Voltage checking method

Common Ground REG1 Heater Sink in PCB
and 1) IC01 MICOM #4 ; Square wave
voltage → 3V measured after MULTI TEST
IC01 MICOM #4, COMP operates

Common PCB Ground
REG1 Heater Sink

Start

Check after 7 minutes

Repair OPEN & disconnection

Repair OPEN &

disconnection

Did 7 minutes pass

after Compressor OFF?

No

Yes

No

Check bad contact of connector

Check bad contact of connector

No

Replace PCB

0~800Hz 50% Duty

Signal output

No

Check the wire
disconnection

No

Repair the sensor &

replace PCB

No

Yes

No

Yes

Yes

Yes

Yes

Yes

Yes

Yes

Yes

Yes

Yes

Does compressor work
with manual operation?

Is CN75 PIN #4

High?(2.5V)

Is the wiring between

Main and Sub normal?

Is the connector between

Main and Sub normal?

No

Is the connector(CN03)

of COMP normal?

Replace the INVERTER

PCB ASS’Y

No

Is the DIODE voltage

between Pins for a single SPM

part normal?

Is freezer sensor normal?

Is the temperature sensor of

MAIN PCB normal?

Normal

Refer to the DIODE voltage value in

the SPM

Replace the resistance &

INVERTER PCB ASS’Y

No

Is the resistance value

at the measured position

normal?

Replace COMP ASS'Y

No

Is COMP ASS'Y

normal?

300K-F(CHIP) : INVERTER PCB

R509,510,511,512,513,514,515

Did buzzer of manual operation sound?

(Check certainly after manual operation)

82

83

TROUBLESHOOTING

SPM FREEWHEELING DIODE VOLTAGE VALUE

84

TROUBLESHOOTING

4-2-9. When alarm sounds continuously without stop(related with buzzer sound)

Start

Door is ajar

Start

Is door closed

completely?

Is water penetrated

into the door switch?

Is the door

switch unit normal?

Is the connector(CN30)

inserted correctly?

Is manual operation

/defrost selected?

Does buzzer sounds

when power On again?

Is the input

voltage of main #83 and #82

changed at door-open and close

status?

① If 'ding-dong'sound continuously

② If 'beep-beep' sounds continuously

Remove causes after comprehending
the conditions of interferance by door
gasket, food etc,

Replace Door S/W

Repair wire connection and
Door S/W

Normal

Recheck and Replace Panel
PCB

MAIN PCB & Door S/W is normal.

Recheck and replace Panel PCB

Seperate the door switch andcheck if
the measured value of unit is
changed from 0Ω to ∞Ω
according to switch ON/OFF.
* FF Door Switch is magnetic switch.
(It can be operated when door

magnet is combined with it.)

Replace Door S/W

Connector is not inserted,
Repair disconnect part

Enforce the cancelation the
manual operation/ defrost function
or power On after power Off

Door & MICOM State

DoorFMICOM

(#83)

Close
Open

5V(High)
0V(Low)

0V(Low)
5V(High)

R MICOM(#82)

Right and Left

85

TROUBLESHOOTING

③ If buzzer does not sound

Buzzer is installed on the panel PCB in this model.
If buzzer does not sound even though the button is pressed, manual operation is started and door
is opened, it should separate panel PCB and check the breakage of buzzer and bad soldering.
It is very hard to repair the panel PCB because it consists of SMD assemblies.
It is recommended to replace PCB assembly when the failure associated with panel is occurred
except the minor error such as switch pressing error, surface peeling off and so on.

Start

Does it sound

'dingdong' if press a button

on the front panel?

Is there any damage

or breakage of the buzzer in

the panel PCB?

Did lead of a component

fall on the vibration plate of

buzzer?

Does it make

a sound of 'dooropen'

alarm when you are opening the door

of freezer or Fridge more than 3

minutes?

MAIN PCB normal,
BUZZER normal

Check the panel PCB with reference
of <how to check Panel Display>

Replace Panel PCB

Replace Panel PCB

Recheck the button pressing
force and mechanical problem

86

TROUBLESHOOTING

4-2-10. If Panel PCB does not work normally

① When lighting of Panel PCB is disabled or only some LED Lamp are disabled

Be careful to repair because display of this model is installed in the MICOM of internal PCB.
It is recommended to replace PCB MAIN after checking except specified solder touch.

Start

Is the connector of
upper hinge cover
inserted correctly?

Is MAIN PCB
connector (CN50)
inserted correctly?

Is Panel PCB

connector inserted

correctly?

Does lighting operate

normally after replacing

Panel-PCB?

Are one or more keys

pressed continuously?

Is the PCB system

still operated by separating

of the mechanism?

Does the lighting operate

normally after replacing the

Panel-PCB ?

Refer to the electronic
circuit diagram in the
manual or circuit diagram
on the back side of the
appliance

Reinsert connector,
Repair bad contact

Reinsert connector of MAIN PCB

Reinsert connector,
Repair bad contact

Panel PCB itself has trouble.

Reassemble the PCB ASS'Y /
Enforce the cancelation of pressed keys

Reassemble the PCB ASS'Y /
Enforce the cancelation of pressed keys

Panel PCB itself has trouble.

① Check the wiring between Dispenser part and Upper Hinge Panel - disconnection, short between wires
② Check the wiring between fresh food compartment upper cabinet and MAIN PCB - disconnection, short between wires

①Check the wiring betwwen Dispenser part and Uper Hinge Panel- disconnection, short between wires.
②Check the wiring of the fresh food compartment upper cabinet - disconnection, short between wires.
③Check the short/open of the panel communication and power supply circuit in MAIN PCB.

② If Panel PCB KEY is not selected

※ If it is not repaired with the above basic checking method

87

TROUBLESHOOTING

4-2-11. If Pantry Panel PCB is not working normally

You should check the display after door opening because the display of this model operates only when
the fresh food compartment door is opened.

Start

Does fresh food

compartment door switch

operate normally?

Is the connector of

pantry room in fresh food

compartment inserted

correctly?

Is MAIN PCB

Connector (CN51), CN79

inserted correctly?

Is signal of

MAIN PCB CN51, CN79

normal?

Is the lighting

operated when replace Pantry

Panel-PCB?

Is a key pressed

continuously?

Is the PCB system

still operated by separating

of the mechanism?

Is the lighting operated

after replacing the Pantry

Panel-PCB?

Is a normal voltage

outputted from MAIN PCB IC51, CN79

during the key operating?

Check and repair the switch
* Refer to<how to repair door switch>

Reinsert Connector,
Repair bad contact

Reinsert connector in MAIN PCB

Check voltage/Replace MAIN PCB

Panel PCB itself has trouble.

Reassemble PCB ASS'Y /
Enforce the cancelation of
pressed keys

Reassemble PCB ASS'Y /
Enforce the cancelation of
pressed keys

Convertible compartment Panel
PCB itself has trouble.

① Replace MAIN PCB
② Check the short of MAIN

Panel wire

① Check the wires of Pantry Room - disconnection, short between wires
② Recheck the control circuit of MAIN PCB Pantry Panel
③ Check the wire assembling between Panel and MAIN

① Check the wire of Pantry Room - disconnection, short

between wires

② Check the short/open of the pantry panel lighting

circuit in MAIN PCB.

② If Panel PCB Key is not selected

If Panel Key is not selected

※ If it is not repaired with the above basic checking method

Typical PCB Ground
REG1 Heater Sink

☞ Checking method of voltage Based on

PCB typical Ground REG1 Heater Sink

1) Key voltage ; CN51#6"(Purple)

2) LED part voltage ; CN51-"1"(Yellow),
"2"(Pink),"3"(Orange) → Voltage of CN51
is same as IC50 #14,#13,#12 voltage.

1) select(operating) (0V)

2) normal(about5.0V ±0.5V)

- Display On (0.7V±0.5V) - Display Off (11V±1V)

88

TROUBLESHOOTING

4-2-12. When refrigerator ROOM Lamp does not light up

1. When you replace the lamp of freezer, please power OFF to avoid an electric shock.

2. Please keep in mind you could get burnt by the excessive heating of an incandescent light bulb.

3. Bimetal is installed in the refrigerator LAMP. Check that if LAMP may be turned OFF by bimetal.

※ We only explaine about Fresh Food compartment in this page.

Because it is possible to repair the other room lamps with the same method.

1) AC Lamp
(Option)

Start

Is the inside lamp

filament cut?

Is Lamp OFF by

bimetal operating?

Is the connection

point of R-door switch

normal?

Is the control relay

of the inside lamp in PCB

normal?(RY75)

Repair the inside lamp

Fresh food compartment
AC Lamp is applied only.

Repair door switch

Replace PCB and
Replace Relay

Check the connection of RDoor
switch and repair the inside lamp
socket

Reference

* The interior lamp relay operates lighting/lightout

according to door open / close.

* If interior lamp does not light, check the noise of relay

operation.

* Noise of relay operation sounds every Door Open /

Close.
* F-LAMP Relay -- RY74
* R-LAMP Relay -- RY75

Reference

If the door is opened, the contact of door switch will be opened and MICOM will get applied 5V to finally sense Open.
If 5V has been sensed over 3 minutes afterwards, Door-Open alarm will sound ‘Ding-Dong’for 10 seconds in a one minutes cycle. For
that reason, if the door switch has failure, the refrigerator can make a “Ding-Dong”sound with oneminute cycle. Please note the step for
its service.

Wait for returning time
of bimetal

☞ When measure lamp resistance to the Wire
→ Resistance can be changed by Lamp input voltage.

(Actual measurement is below, it can be changed by
performance)

☞ Checking method of Door Switch voltage

- Measuring voltage of CN30#2(Purple), CN30#1(black) and REG1, HEAT SINK
from PCB typical Ground part

→ See the R DOOR Switch at the following picture.

Wire color changed from
the following picture

☞ Fresh food

compartment lamp
CN70#9(Red) ↔
CN71#1 (Blue) ;
10Ohm±5%
Lamp ; 60W + 60W

☞ Freezer

compartment lamp
CN70#9(Red) ↔
CN71#3 (Gray) ;
15Ohm±5%
Lamp ; 60W

Typical PCB Ground REG1 Heater Sink

CLOSE

OPEN

Door & MICOM State

Door

F

MICOM

(#83)

Close
Open

5V(High)

0V(Low)

0V(Low)

5V(High)

R(Option)

R MICOM(#82)

Right and Left

89

TROUBLESHOOTING

When controlling the regrigerator light with Regulator(12V) : LED LAMP
→ Applying only to the FF compartment.

* If the Vegetable Lamp does not work properly, check the FF compartment LED Lamp because it is

connected with the FF compartment LED Lamp in parallel. Refer to the circuit diagram to repair.

1) LED Lamp (Option)

Start

Check/Replace REED

S/W, Magnet ASS’Y

Does the DOOR S/W

sense properly?

(Open/Close)

No

Replace/Repair the

PCB

No

Replace/Rep air the PCB.

Repair IC76

No

Check the connector terminal

Replace PCB

No

Check the connector

terminal

No

Replace LED LAMP

Normal

☞ Output Voltage Checking Method

- Common Ground REG1 Heater Sink in PCB and

1) Measuring IC76 voltage(CN78-”4”(Red) / R ROOM LED)
Measuring IC77 voltage(CN78-”1”(Black) / F ROOM LED)

☞ Door Switch voltage Checking Method

- Measuring common Ground REG1 Heater Sink in PCB
and CN30-”2”(Purple) (R Door Switch)

Typical PCB Ground REG1 Heater Sink

LED Lamp ON LED Lamp OFF

Close

Open

Door & MICOM State

MICOM(#82)

Door

Right and Left

0V(Low)Close

Open

5V(High)

No

Check the wire

Re-insert the connector

No

Yes

Yes

Yes

Yes

Yes

Yes

Yes

Is the output voltage

of IC01 MICOM #119

normal?

Is the output voltage

of IC76 normal?

Is the MAIN PCB

connector(CN78) inserted

properly?

Does the MAIN PCB

connector(CN78) output

properly? (11~13V)

Is the LED LAMP connected

properly?

Is the LED LAMP normal?

MICOM State

Door

(Right and Left)

R

Close

#119

Open

0V (Low)

5V (High)

F

#122

5V (High)

0V (Low)

IC76(R)/IC77(F) State

Micom

IC76(R)/IC77(F) output

0V (Low) 0V (Low)

5V (High) 11~13V (High)

90

TROUBLESHOOTING

4-2-13. If ICE Water is not supplied

Start

Is the confirming sound of

the valve operation heard when

Ice maker(R) test switch pushed?

Does Main PCB MICOM

#54 have high (5V)output?

Does Main PCB IC73

#15 have about 0.7V

output?

Is the contact point of main

PCB RELAY RY78 normal?

MAIN PCB normal

-- Need to check the other parts
① Check the wire between Ice

water valve↔MAIN PCB

② Ice water valve itself has trouble

or bad contact of connector

③ Check the connection hose

Normal(Check Ice
water valve hose)

Check soldering
short/Replace PCB

Check soldering
short/Replace PCB

Check soldering
short/Replace PCB

Typical PCB Ground REG1 Heater Sink

☞ Checking method of voltage Based on

PCB typical Ground REG1 Heater Sink

1) Check the voltage of IC73#4(same voltage
as IC01 #54)

- ICE Water valve operating (about 5V±0.5V)

Based on PCB typical Ground REG1 Heater Sink

2) IC73 #15 voltage

- ICE Water valve Waiting (about 13V±0.8V)

- ICE Water valve operating (about 0.7V±0.5V)

3) Check the voltage of Fridge Ice Water Valve

operating(AC voltage)
=> For checking the Relay RY78 operating.
CN73 and CN74 combined and use same connector(13p)
CN70#9(Red) ↔ 13P#7(Purple)

- ICE Water valve waiting (about AC 0V)

- ICE Water valve operating (about AC 115V ± 20%)

1. Please shut the water supplying prior to repair.

2. Power is applied to the one end of wires. Be careful when disassembling not to get an electric shock.

1) Fridge Ice Water Valve

91

TROUBLESHOOTING

Start

Is the confirming sound of

the valve operation heard when

Ice maker(F) test switch pushed?

Does Main PCB MICOM

#58 have high (5V)output?

Does Main PCB IC72

#18 have about 0.7V

output?

Is the contact point of main

PCB RELAY RY76 normal?

MAIN PCB normal

-- Need to check the other parts
① Check the wire between Ice

water valve↔MAIN PCB

② Ice water valve itself has trouble

or bad contact of connector

③ Check the connection hose

Normal(Check Ice
water valve hose)

Check soldering
short/Replace PCB

Check soldering
short/Replace PCB

Check soldering
short/Replace PCB

Typical PCB Ground REG1 Heater Sink

☞ Checking method of voltage Based on

PCB typical Ground REG1 Heater Sink

1) Check the voltage of IC72#1(same voltage

as IC01#58)

- ICE Water valve operating (about 5V±0.5V)

Based on PCB typical Ground REG1 Heater Sink

2) IC72 #18 voltage

- ICE Water valve Waiting (about 13V±0.8V)

- ICE Water valve operating (about 0.7V±0.5V)

3) Check the voltage of Fridge Ice Water Valve

operating(AC voltage)
=> For checking the Relay RY76
CN70-"9"(Red) ↔ CN72-"5"(Brown)

- ICE Water valve waiting (about AC 0V)

- ICE Water valve operating (about AC 115V ± 20%)

2) Freeze Ice Water valve(RFG238 MODEL)

TROUBLESHOOTING

4-2-14. If Cubed or Crushed Ice is not supplied

92

Start

① Check the Ice making switch
② Check the DOOR Switch
③ Check the Ice moving motor
④ Check the wiring connections of Ice moving motor
⑤ Check if the COVER ICE ROUTE opens
⑥ Check the Q706 movement related with

① Check the water pipe

: bending / Shut off

② heck route of ice check solenoid
③ Check he Ice Maker wiring

Freezer door shall be
closed during operation.

If MAIN PCB is normal

- Need to check the other parts
① AUGER MOTOR ↔ MAIN PCB

Check the door wiring connections.

② CUBE MOTOR ↔ MAIN PCB

Check the door wiring connections/trouble their own or bad wiring connections.

Normal Operation status

Are Ices ejected?

Which mode is

selected?

Is Cubed Ice ejected?

No

Cubed Ice ejected

Crushed Ice

Cubed Ice selected

Is Cubed Ice mode

selected on the

panel PCB?

No

Cubed Ice

No

Yes

Yes

Yes

Yes

Yes

Yes

Yes

Check the wire connections/

Cube Solenoid

Is the CUBE MOTOR

positioned at cubed

ice mode?

No

- Check the Ice switch has trouble itself

- Check the wire connections

- Replace the MAIN PCB

- ICE S/W self diagnosis

- Check the connecting wires.

- MAIN PCB failure : Replace

Is MICOM IC01 #103
change into 0V when

press Ice switch?

No

Is the Dispenser

Cover opened?

No

Replace the MAIN PCB

(Errors on IC01)

Is IC73 #1,2 changed

into 5V when pressing

Ice Switch?

No

- RY7A, RY7B RELAY Error

- Replace the MAIN PCB

After disconnecting the
CN70, CN71and 13P
(CN73, CN74) measure
the both ends of contact
points of RY7A, RY7B

After disconnecting the
CN70, CN71 and 13P
(CN72, CN73), measure
the both ends of contact
points of RY7A.

Is the contact

point of RY7A & RY7B RELAY

changed into 0Ω

No

No

No

Yes

Yes

No

Yes

Yes

Yes

Yes

Yes

Yes

No

No

No

No

No

Normal Operation status

Cancel the “Ice Off”

Is Crushed Ice ejected?

Crushed Ice selected

Is Crushed Ice mode

selected on the

panel PCB?

Check the wire connections/

Motor Cube

Is the CUBE MOTOR

positioned at cubed

ice mode?

- Check the Ice switch has trouble itself

- Check the wire connections

- Replace the MAIN PCB

Is MICOM IC01 #103
change into 0V when

press Ice switch?

check the WIRE & Motor

check Cover ice route S/W 1,2

Replace the MAIN PCB

Is the Dispenser

Cover opened?

Replace the MAIN PCB

(Errors on IC01)

Is IC73 #2 changed

into 5V when pressing

Ice Switch?

- RY7A RELAY Error

- Replace the MAIN PCB

Is the contact

point of RY7A RELAY

changed into 0Ω

Are Ices in the Ice bucket?

Is “Ice Off” mode

selected on the display

panel?

No

93

TROUBLESHOOTING

4-2-15. If Cover Ice Route Motor(Geard Motor) is not working normally

Start

Replace the MOTOR

Does GEARED MOTOR

work properly?

No

Yes

Cubed or Crushed Ice is selected
on the LED PANEL PCB

Is Cubed or Crushed

Ice mode selected on the

LED PANEL?

No

Yes

Select the DISPENSER switch

Is the DISPENSER

switch selected?

No

Yes

Check the WIRE

Does the wiring at the

both sides of motor connected

properly?

No

Yes

When the MOTOR
rotates.

Check the MOTOR/Check any
interference on MOTOR rotation

① CN73 and CN74 combined and use same connector(13P).

Check 13P-”9” Connector / Re-connect

② Check the short/open for the SSR75 of Cover Ice Motor on Main PCB.
③ Check the resistance of parallel Connector 13P-”9”, CN70-”9”.

(Definitely plug out prior to repair)

Caution

1. When replacing the Cover Ice Motor, pull out the plug to avoid an electric shock.

2. Be careful! When disassemble the Cover Ice Motor, spring can jumped out and may cause personal injury.

3. Motor will rotate continuously when the Motor Switch is not sensed.

① Main PCB - Check the wire OPEN/SHORT between the Cover Ice Motor Rotation sensing switches.
② Check the Short of Cover Ice Motor Control Circuit SSR75 in the MAIN PCB.
③ Replace the MAIN PCB or the Dispenser Cover Motor.

Is the AC input voltage

applied to the both ends

of the motor?

Yes

No

Check/Repair the Housing
connector

Is the sensing

SWITCH connection

normal?

No

Yes

Check/Repair the Motor Rotation
pressing area

Is the switch

pressed area normal when

motor rotates?

No

Yes

Normal

Are the voltage

REG1 Heater Sink and CN50-”9”,

“10” normal?

Yes

No

Operating Condition of Dispenser
Open/Close
CN50 - Switch 1,2 Operating

OpeningClose

Ice Route Switch 1
CN50 - “9” (Purple)

Ice Route Switch 2
CN50 - “10” (White)

0V 0V5V

0V 0V5V

☞ Checking Mehod of Cover Ice Route Motor

Resistance
(Make sure to work after Power Off)
The Resistance is variable according to

the input voltage.
CN73 and CN74 combined and use same
connector(13P)
CN70#9(RED) ↔ 13P#9(Blue)
** 0Ω: Short trouble / ∞Ω: Open trouble

94

TROUBLESHOOTING

4-2-16. If Inverter PCB Power is not supplied

- See the operations and
reference in this manual
when check the MAIN PCB.

Start

Replace FUSE & check the root cause

Is the fuse on AC

110V/220V down?

Yes

No

Check the wire connection

Is 110V/220V

applied between both end of

inverter PCB CN01?

No

Yes

Replace FUSE - 250V 5A

Is the fuse on MAIN

PCB down?

Yes

No

Check PCB PATTERN & Replace BD1

Is DC 300V

applied between both ends of

BD1+,-?

No

Yes

Replace PCB ASS’Y

Is DC300V

applied to HYBRID

IC #10 PIN?

No

Yes

1) Replace HYBRID IC(IC3:BP5047B15)

2) Replace PCB ASS’Y

Is DC15V

applied to HYBRID

IC #1 PIN?

No

Yes

Replace REG1 (KA78L05)

Is 5V applied to C104?

No

Yes

Normal

Replace PCB ASS’Y

Is there any

PCB soldering short or

breakage?

No

Yes

At the INVERTER PCB Power, AC
110V/220V power and over DC 300V
of high-voltage are applied. Please take
care of yourself when repair and
measure.

Caution

95

TROUBLESHOOTING

4-2-17. LED blinking frequency depending on protecting functions

If Failure Condition is detected during compressor is operating, immediately stop Compressor operating and stand
by 5 minutes. During this 5 minutes, RPM command signal is not available. It means, even if available RPM
command signal is applied to the compressor, it does not work and keep standing by.

Blinking time is 1 second and dwell time is 2 seconds.

LED blinking frequency depending on protecting functions

Protecting Functions LED Blinking Frequency Remarks

Starting Failure

SPM Fault

Detecting Positon Failure

Motor locked

Low Voltage

Over Voltage

ROM

RAM

Stack

Reserved

96

TROUBLESHOOTING

INVERTER PCB Circuit Diagram

97

5 . EXPLODED VIEW& PARTS LIST

5-1) FREEZER ·······································98

5-2) REFRIGERATOR ····································102

5-3) CABINET ·······································108

5-4) DISASSEMBLY OF FREEZER DOOR ···························112

5-5) DISASSEMBLY OF REFRIGERATOR DOOR LEFT ····················114

5-6) DISASSEMBLY OF REFRIGERATOR DOOR RIGHT····················116

98

EXPLODED VIEW& PARTS LIST

5-1) Freezer

1-8

5-4

5-3

5-2

5-8

5-1
5-7

5-6

5-9

5-5

17-2

17-3

17-9

17-11

17-14

17-14

17-5

17-7

17-1

17-12

17-16

17-8

17-21

17-6

17-18

17-4

17-10

17-13

17-18

17-20

17-23

17-22

17-20

17-17

16-4

16-3

16-2

16-1

12-5

12-1

12-3

12-4

12-2

9-6

9-1

9-5

9-2

9-3

9-4

1

5

2

3

6

8

9

10

11

12

13

14

15

16

17

7

4

1-4

1-9

1-9

1-5

1-11

1-7

1-10

1-6

1-2

1-3

1-1

18-2

18-1

18

5-9

5-10

5-11

5-12

5-13

19

17-19

17-24

17-15

NNOO

QQUUAANN

TTIITTYY

CCOODDEE--NNOO RREEMMAARRKKPPAARRTT NNAAMMEE SSPPEECC

■■

Parts List of Freezer

99

EXPLODED VIEW& PARTS LIST

1
1-1
1-2
1-3
1-4
1-5
1-6
1-7
1-8
1-9

1-10

2

3

4

5
5-1
5-2
5-3
5-4
5-5
5-6
5-7
5-8
5-9

5-10
5-11
5-12
5-13

6

7

8

9
9-1
9-2
9-3
9-4
9-5
9-6

10
11

12
12-1
12-2
12-3
12-4
12-5

13

14

15

16
16-1
16-2

DA96-00462B

6501-000123

6501-000124
DA32-00006S
DA47-00243B
DA47-00244A
DA59-00361A
DA60-90005A
DA61-02901A
DA61-03644A
DA61-04225A
DA63-02902B
DA63-04955A

DA96-00398C

DA97-07534A
DA61-04154A
DA63-04939A
DA63-04252B
DA63-04253A
DA63-40167A
DA66-00554A
DA66-10104A
DA71-20145A
DA61-05185A
DA61-05186A
DA61-05187A
DA63-05155A
DA66-00674A
DA61-05251A
DA61-05238A
DA63-04942A
DA97-07536A
DA34-00047A
DA61-03154A
DA61-05189A
DA61-05231A
DA61-03285A
DA66-00436A
DA66-00437B

DA67-00859C

DA97-07535A
DA61-03154A
DA61-05190A
DA61-03285A
DA61-05230A
DA66-00435A
DA63-04941A
DA34-10120E
DA61-05188A
DA97-07533A

6002-000213
DA61-03160A

ASSY EVAP-FRE
CABLE TIE
CABLE TIE
SENSOR TEMP-R-DEF
THERMO BIMETAL-PROTECTOR
HEATER-METAL SHEATH
EVAP-FRE ICE
RIVET-AVEX
FIXER-SENSOR EVAP
PLATE-EVAP HEATER
PLATE-DRAIN FRE
COVER-FIXER HOUSING V
COVER-LAMP FRE
ASSY-LAMP LED
ASSY TRAY-FRE UPP
FIXER-ROLLER TRAY FRE UPP
TRAY-FRE UPP
COVER-TRAY FRE UPP A
COVER-TRAY FRE UPP B
GROMMET-COVER CHIL
ROLLER-TRAY FRE UPP
ROLLER-FRE
FIXER-ROLLER
GUIDE-TRAY FRE UPP R
GUIDE-TRAY FRE UPP L
CASE-ICE CUBE (RFG238)
TRAY-CASE ICE CUBE (RFG238)
SHAFT-TRAY FRE UPP
RAIL-FRE UPP L
RAIL-FRE UPP R
COVER-RAIL LOW L
ASSY RAIL-SLIDE LOW L
SWITCH PRESSURE
FIXER-GEAR
HANGER-RAIL LOW L
RAIL-SLIDE LOW L
HANGER-RIVET
GEAR-L
SHAFT-GEAR
CAP-DOOR HANDLE
ASSY RAIL-SLIDE LOW R
FIXER-GEAR
HANGER-RAIL LOW R
HANGER-RIVET
RAIL-SLIDE LOW R
GEAR-R
COVER-RAIL LOW R
SWITCH DOOR-F
GUIDE-DRAWER BOX
ASSY TRAY-DRAWER BOX
SCREW-TAPPING
REINF-DRAWER BOX

AW-PJT('08),115V/240W
DACT-140,-,W3.6,L146,NTR,NYLON66
DA-200,T1.2,W4.8,L203,NTR,NYLON66
PX-41C, 502AT,AW-PJT,-40~110°…,5V,-,-,R-DEF SENSOR,YEL,400MM
AW-PJT(F),BT-121-M, PW-5M1N,125 / 250V,10 / 5A,60°…,40°…,-,- ,100 ㏁,-,-

-,AW-PJT,-,240W,-,115V,55.1Ω,-,-,F-ROOM

-,PIN,-,-,115V,-,-,-,AW-PJT,­AL,D3.2,L9.83,-,­CORE-PJT,PP,-,NTR,­AW-PJT,AL,T0.7,-,-,-,­AW2-PJT,GALVANUME,T0.3,-,-,-,­NEXT-PJT,GALVA,T0.3,W31,L42,-,-,-,­AW2 CD,PC,-,-,-,-,-,NTR,­AW CD-PJT,3chip 9EA
AW2 CD,-,-,-,COOL WHITE,­AW-PJT,POM,1.8,NATURAL,­AW2 CD,ABS,-,-,-,-,COOL WHITE(SC-02740R),­AW2,ABS,-,-,-,-,-,COOL WHITE,­AW2,GPPS,-,-,-,-,-,-,-

-,SILICON,T3.0,-,L16,-,-,BLACK,­AW-PJT,POM,42.2,-,NATURAL,-,PVC COATING
POM,-,-,D22,-,-,

-,PA,--,­AW2 CD,PA+ABS,COOL WHITE(SC-02740R)
AW2 CD,PA+ABS,COOL WHITE(SC-02740R)
AW2 CD,PP,-,-,-,COOL WHITE(SC-02740R),­AW2 CD,LDPE,NTR
AW2 CD,SM25C,-,-,WHITE,-,­AW2 CD,ABS,-,-,389.9,COOL WHITE,­AW2 CD,ABS,-,75.4,389,COOL WHITE,­AW2 CD,ABS,-,-,-,-,-,COOL WHITE(SC-02740R),­AW2 CD-PJT,-,-,-,-,STS430
AW-PJT,-,-,-,-,PP,COOL WHITE
AW-PJT,POM,-,NTR,­AW2 CD,SECC1,T1.6,COOL WHITE(SC-02470T),-,-,­AW2 CD,STS430,-,-,-,-,­AW-PJT,BSW2,-,-,-,-,­AW-PJT,POM,-,-,-,NTR,-,-,­AW2,SM25C,715.1,-,-,-,BLACK Electro-deposition Coating
CORE,ABS,-,-,-,INOX,SC-06034R
AW2 CD-PJT,-,-,-,-,STS430
AW-PJT,POM,-,NTR,­AW2 CD,SECC1,T1.6,COOL WHITE(SC-024070T),-,-,­AW-PJT,BSW2,-,-,-,-,­AW2 CD,STS430,-,-,-,-,­AW-PJT,POM,-,-,-,NTR,-,-,­AW2 CD,ABS,-,-,-,-,-,COOL WHITE(SC-02740R),-

-,slide,-,-,250V,-,0.5A,-,-,-,-,-,-,cool white,-,-,-,­AW2 CD,PP,-,-,-,COOL WHITE(SC-02740R),­AW2 CD,-,-,-,COOL WHITE,­TH,+,-,1,M4,L12,ZPC(WHT),SWRCH18A,­AW-PJT,SHP1,T2.0,BLACK

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