REFRIGERATOR

FRENCH DOOR REFRIGERATOR

BASIC : RF26J*
MODEL CODE : R  F26J7500**/AA
RF26J7500**/CA

REFRIGERATOR CONTENTS
1. PRECAUTIONS(SAFETY WARNINGS)········5

2. PRODUCT SPECIFICATIONS·······················9

3. DISASSEMBLY AND REASSEMBLY··········26

4. TROUBLESHOOTING·································53

5. PCB DIAGRAM············································96

6. BLOCK DIAGRAM·····································101

7. MODEL CODE TABLE·······························103

 WARNING

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 ©2014

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.
 272, Oseon-Dong, Gwangsan-Gu,
Gwangju-City, Korea, 506-253
TEL : 82-62-950-6193, 6896
FAX : 82-62-950-6829

Europe, CIS, Mideast & Africa: gspn1.samsungcsportal.com

Asia: gspn2.samsungcsportal.com
North & Latin America: gspn3.samsungcsportal.com
China: china.samsungportal.com

- This Service Manual is a property of Samsung Electronics Co., Ltd.

Any unauthorized use of Manual can be punished under applicable
International or domestic law.

© Samsung Electronics Co., Ltd.

Refrigerator Division 2014
Printed in Korea
3. Disassembly and Reassembly

3-1) PRECAUTION................................................................................................................... 27
3-2) Refrigerator Door.............................................................................................................28
3-3) Door Handle Refrigerator...............................................................................................29
3-4) Door Handle Freezer & Flex zone................................................................................30
3-5) Refrigerator Light..............................................................................................................31
3-6) Cover-Display & Water-Dispenser.............................................................................. 32
3-7) Water-Dispenser.............................................................................................................33
3-8) Glass Shelf.......................................................................................................................34
3-9) Foldable Glass Shelf.......................................................................................................34
3-10) Vegetable & Fruit Drawers Shelf.................................................................................35
3-11) Cool Select Pantry.........................................................................................................36
3-12) Case Water Filter........................................................................................................... 37
3-13) Motor Damper................................................................................................................38
3-14) Water Filter (Assembly & Disassembly)......................................................................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 lamp.................................................................................................................48
3-23) Door Switch In Freezer.................................................................................................48
3-24) Evaporator Cover In Freezer.......................................................................................49
3-25) Evaporator In Freezer...................................................................................................49
3-26) Comp Cooling Fan........................................................................................................50
3-27) Comp Cooling Fan Motor..............................................................................................51
3-28) Electric Box.................................................................................................................... 52

26
Disassembly and Reassembly

3-1) PRECAUTION
• 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
IMAGE ITEM USE

Use for assembling and

Phillips Head Driver
disassembling of screw

Use for assembling and

disassembling of HomeBar,
Flat Head Driver
Dispenser, Deli Cartessen Box,
Main PBA etc...

Use for assembling and

Hex Wrench Ø0.08＂
disassembling of Handle

Use for assembling and

Socket Wrench Ø0.4＂
disassembling of Door Hinge

27
Disassembly and Reassembly

3-2) Refrigerator Door

Part Name How To Do Descriptive Picture

1. Remove the 3 screws holding down

the Top Table and remove the Top

Table ()


2. Disconnect the electrical ()
above the upper left door hinge To
disconnect the connector () more
easily, press the end of the hook
() and pull connector.

Make sure unit is

CAUTION unplugged.

Refrigerator Door

3. 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 ().

4. After pulling the Hinge Lever,

remove the Hinge.

28
Disassembly and Reassembly

Part Name How To Do Descriptive Picture

5. Lift the door straightly up to remove.

Refrigerator Door
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 ().

3-3) Door Handle Refrigerator

Part Name How To Do Descriptive Picture

1. Loose Set Screw with 0.1in Hex

wrench and pull front the handle.

Door Handle Fridge

2. Remove the cover vinyl of door.

29
Disassembly and Reassembly

3-4) Door Handle Freezer & Flex zone

Part Name How To Do Descriptive Picture

1. Loosen the Set Screw situated at

the bottom right of the appliance
about 0.1in by using Hex wrench.

Door Handle
Freezer 2. Pull the Set handle out by moving it
to the right side.

Be careful not to scratch

CAUTION or break the parts

30
Disassembly and Reassembly

3-5) Refrigerator Light

Part Name How To Do Descriptive Picture

1. Press the tabs on the back of the

Lamp Cover and take it off.

Refrigerator Light

2. Remove the 3 screws And separate

the LED panel.

31
Disassembly and Reassembly

3-6) Cover-Display & Water-Dispenser

Part Name How To Do Descriptive Picture

1. Remove a screw under the display

cover.

2. Remove the display cover by

pulling it up.
Put the thumbs on the surface door
and hold the bottom of the Display
Panel with four fingers. And then,
Cover-Display pull out the Display Panel as shown
in the photo to remove it.

Take care not to break

CAUTION the Locking Tabs.

3. Disengage the housing connect of

display cover.

32
Disassembly and Reassembly

3-7) Water-Dispenser

Part Name How To Do Descriptive Picture

1. Disengage the Housing Connector

by pushing a flat-blade
screwdriver.

2. Remove 2 screws of the Case Ice

Route Assy.

Water-Dispenser 3. Pull the Case Ice Route Assy.

4. Assembly shall be in order from the

disassembly. Make sure to fix the
hose to the Case Ice Route before
assembling the Display.

5. When assembling Cover-Display,

first insert it from upper side and
then assemble to bottom side.
Otherwise, the hook can be broken.

33
Disassembly and Reassembly

3-8) Glass Shelf

Part Name How To Do Descriptive Picture

1. Remove the shelf by lifting the front

Glass Shelf part of the shelf up and pulling it
out.

3-9) Foldable Glass Shelf

Part Name How To Do Descriptive Picture

Foldable Glass 1. Remove 2 screws of the Folderble

Shelf Glass Shelf.

34
Disassembly and Reassembly

3-10) 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.

Vegetable & Fruit

Drawers Shelf

2. Remove the vegetable & fruit

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

35
Disassembly and Reassembly

3-11) Cool Select Pantry

Part Name How To Do Descriptive Picture

1. Remove the cool select pantry by

Cool Select Pantry pulling the roller part and lifting it
up.

1. Remove the cool select pantry

Cool Select Pantry
cover by lifting up the left part of
Cover
the cover and pulling it.

1. Remove the cool select pantry shelf

Cool Select Pantry
by lifting the front part of the shelf
Shelf
while pulling it.

1. Remove the cool select pantry rail

by unscrewing the 2 screws and
pulling the rail.
Cool Select Pantry
Rail

2. Disconnect the housing connector

from the internal rail part.
(Refer to the picture)

36
Disassembly and Reassembly

3-12) Case Water Filter

Part Name How To Do Descriptive Picture

To disassemble the Case Water Filter,

remove the water filter and all drawers and
shelves.

1. Remove the 3 screws holding down the

Top Table and remove the Top Table
().

2. a. Remove Cover Tube Fitting (). 

b. Remove the Water tube (blue) from
the tube fitting by pushing in on the
Case Water Filter locking ring () and pulling out the
tube.

3. Remove three screws securing the

water tubes.

4. a. Pull the Water blue hose out. 

b. Push the Tube Fitting () and pull
the grey hose out.

37
Disassembly and Reassembly

Part Name How To Do Descriptive Picture

5. Disconnect the 2 Housing connectors

(). 

Case Water Filter

6. Lift and pull the Case Water Filter out.

3-13) Motor Damper

Part Name How To Do Descriptive Picture

1. Remove the cool select pantry.

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

Motor Damper

2. Disengage 2 housing connectors

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

38
Disassembly and Reassembly

3-14) Water Filter (Assembly & Disassembly)

Part Name How To Do Descriptive Picture

1. Turn the water filter count-clockwise.

(Refer to the picture)

2. Remove the water filter by pulling it.

(Refer to the picture)

Water Filter

3. Push the water filter directly.

4. Turn the water filter clockwise until it

locked.

Be sure to flush the dispenser thoroughly (approx. 6 to 7 minutes), otherwise water may
CAUTION
drip from the dispenser. This means that there is still air in the line.­

3-15) Gallon Door Bin

Part Name How To Do Descriptive Picture

1. Remove the gallon door bin by

Gallon Door Bin lifting it up.
(Refer to the picture)

39
Disassembly and Reassembly

3-16) 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.

Vertical Hinged
Section

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)

40
Disassembly and Reassembly

3-17) 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)

Be careful not to scratch or

CAUTION break the parts.

2. Unscrew 4 screws.

3. Remove the the lower part of angle

Evaporator Cover In mid by pulling it out and pushing it
Refrigerator 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)

Continues a work after

confirming that fan operation
CAUTION
stops.

41
Disassembly and Reassembly

3-18) Evaporator In Refrigerator

Part Name How To Do Descriptive Picture

<Left>
1. Disconnect the housing connector
part on left side.

Before doing the above,

make sure that the unit is
CAUTION
unplugged.

<Right>

2. Disconnect the housing connector

Evaporator In on right side.
Refrigerator

3. Remove the evaporator by moving

it up while holding both of bottom
sides.

42
Disassembly and Reassembly

3-19) Super Extended Drawer

Part Name How To Do Descriptive Picture

1. Slide the drawer in as much as

possible.

Super Extended
2. Lift the drawer up.
Drawer

3. Remove the drawer by lifting the

bottom part of drawer bin and
pulling it out.

43
Disassembly and Reassembly

3-20) Freezer Door

Part Name How To Do Descriptive Picture

1. Take out the upper drawer by

lifting it up.

2. Take out the lower basket (①)

by lifting the basket up from rail
system.
①
The box may get scratch on
CAUTION
its side by getting twisted left
and right when disassembling
the drawer box.
Freezer Door

3. Unscrew 4 bolts.
(2 bolts each on the both sides)

4. Lift up the freezer door from the

rails.

44
Disassembly and Reassembly

3-21) Ice-Maker

Part Name How To Do Descriptive Picture

1. When pressing the Energy-Saver
and the Fridge buttons on the
Display together for 8 seconds at
the same time, it will convert to the
Test Mode and the entire Display
function will be off.
2. When pressing any button within 15
seconds after it is shifted to the Test
Mode, its function will change in the
following order.
Manual operation1(FF) Manual
operation2(0F-r) → manual defrost
of fresh food compartments(rd) →
manual defrost of fresh and freezer
compartments(fd) → cancel(Display
all off).
• Set unit to Fd for 5 minutes. This will
allow for easy removal of the ice
maker.

Ice Maker
3. Lift up the Ice Bucket and pull it out.

4. Remove the screw from the Wire

Housing Cover.

5. Remove the Wire Housing Cover.

6. Disconnect the Ice Maker Housing

Connector.

45
Disassembly and Reassembly

Part Name How To Do Descriptive Picture

7. Remove the screw from the Duct

Tray-ice.

8. With a flat blade screwdriver, push

the duct to the right and remove it
from the locking tab. (Refer to the
image.)

9. With a flat blade screwdriver, pry

down on the refrigerant tube to
separate it from the bottom of the
ice maker. (Refer to the image.)

10. Push down the refrigerant pipe

Ice Maker
slightly and separate the refrigerant
pipe and the Ice Maker Assembly
completely.

11. While pressing the Hook, pull out

the Ice Maker.

12. While pushing down the Duct-

Tray-Ice, pull out the Ice Maker
carefully and remove it.
※ When removing the ice maker, be
careful not to damage the grommets
on the tray or the refrigerant tube.
(Refer to the dotted parts on the
right side photo.)

46
Disassembly and Reassembly

Part Name How To Do Descriptive Picture

If the ice maker is frozen, it can be

Ice Maker
melt by using the steam heater.

1. Disconnect the FAN-AUGER-ASSY

Connector.

Auger Motor Fan 2. Hold the Hook on the bottom of the

FAN-AUGER-ASSY and lift it up to
make it free from the Locking Tab.

3. While lifting it up, take the FAN-

AUGER-ASSY out of the Ice Maker
Compartment.

47
Disassembly and Reassembly

3-22) Freezer lamp

Part Name How To Do Descriptive Picture

1. Remove the cover Freezer lamp ()

using a flat-blade screwdriver.


Freezer lamp

2. Disengage the housing.

Before doing the above,
make sure that the unit is
CAUTION unplugged.

3-23) Door Switch In Freezer

Part Name How To Do Descriptive Picture

1. R e m o v e t h e f r e e z e r d r a w e r
bin by using a flat-blade(-)
screwdriver.(Refer to the picture)

Door Switch In
Freezer

2. Disconnect the housing connector

part.

48
Disassembly and Reassembly

3-24) Evaporator Cover In Freezer

Part Name How To Do Descriptive Picture

1. Loosen the 2 screws, which fix the

Evaporator cover.

Evaporator Cover In
2. Lift up the evaporator cover.
Freezer

3. Disconnect the housing connector

on right and remove the evaporator
cover.

Before doing the above,

make sure that the unit is
CAUTION
unplugged.

3-25) Evaporator In Freezer

Part Name How To Do Descriptive Picture

1. D
 isconnect the 2 housing
connectors on right side.

Before doing the above,

make sure that the unit is
CAUTION
unplugged.
Evaporator In
Freezer

2. Remove the evaporator by pulling

the lower part of the evaporator
while lifting it up.

49
Disassembly and Reassembly

3-26) Comp Cooling Fan

Part Name How To Do Descriptive Picture

1. Unscrew 3 screws of COVER

COMP.

Be careful not to damage from

CAUTION the inner hole of cover comp.

2. Remove the DRAIN HOSE.

3. Remove 1 screw.

Comp Cooling Fan 4. Disengage the HOUSING

CONNECTOR. (Refer to the picture)

5. Pull it forward and lean against the

DRAIN HOSE.

6. Rotate it based on the PIPE.

7. The FAN is disassembled.

/ Assembly it in reverse order.

50
Disassembly and Reassembly

3-27) Comp Cooling Fan Motor

Part Name How To Do Descriptive Picture

1. Remove the screw with a flat blade

screwdriver.

2. Remove the motor fan by pulling

the fan out while graping the motor
part.

Comp Cooling Fan 3. Unscrew 2 screws fixed in the

Motor motor.

4. Remove the BRACKET MOTOR with

a flat blade screwdriver.

5. Remove the MOTOR after pulling

the BRACKET MOTOR out.

51
Disassembly and Reassembly

Part Name How To Do Descriptive Picture

1. Disengage the housing connector.

Relay O/L 2. Remove Cover Relay.

3. Remove the relay O/L with a flat-

blade screwdriver.
(Refer to the picture)

3-28) Electric Box

Part Name How To Do Descriptive Picture

1. Remove the 4 screw attached to

the upper left and right Case PCB
Panel with a phillips screwdriver(+).

2. Disengage all housing connectors

PBA Main from the main PCB.

Before doing the above,

make sure that the unit is
CAUTION
unplugged.

3. Press the lower locking hook down

and remove the Main PBA by
pulling it out.
(Refer to the picture)

1. Remove the INVERTER PBA by

PBA Inverter
lifting the upper part of the hook up.

52
 1. Precautions(Safety Warnings)

● Unplug the appliance before the changing or repairing the electric parts.
➝ Be careful the electric shock.
● Always use only the correct replacement parts.
➝ Check the model, rated voltage, rated current and running temperature
rating.
● When troubleshooting, verify that wiring harnesses are connected securely.
➝ Make sure the connectors are not separated when power is supplied.
● Check for visible traces of water on electrical parts.
➝ Replace or secure any part that may have come in contact with water.
● Check the status of parts after replacement or troubleshooting.
➝ All parts must be reinstalled properly.
● Check the location where the refrigerator will be used.
➝ I f the refrigerator will be used in a damp or wet space, or if installation will
be unstable, the unit should be relocated.
● The refrigerator must be grounded properly.
➝ An earth ground should be used if there is a risk of high humidity or
wetness.
● The refrigerator should be plugged into a dedicated outlet.
Make sure the power cord is not damaged, crushed, squeezed or burned.
● If the plug is damaged it should be replaced.
If the socket is damaged, it should not be used.
● Consumers must not try to repair the refrigerator.
● Nothing should be stored in the refrigerator except food.
➝ Drugs requiring precise temperatures should not be stored in the
refrigerator.
➝ F lammable substances (alcohol, benzene, ether, LP gas, etc.) carry risk of
explosion and should not be stored in the refrigerator.

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

means “Prohibited”.
Indicates that a
Warning danger of death or
serious injury
means “Do not disassemble”.
exists.
means “No contact”.

means ”Warning or Caution”.

Indicates that a risk of
means “Unplug the unit before
Caution personal injury or
material damage preforming service”
exists.
means “Earth or Ground”.

Warning & Caution

Plug out to exchange the interior Use the rated components On repair, make sure that the
lamp. on the replacement. wires such as harness are
• Check the correct model, rated bundled tightly.
• It may cause electric shock. voltage, rated current, operating • Wiring harnesses should be connected
temperature and so on. tightly and kept dry.
• Bundle tightly wires in order not to be
detached by the external force and then not
comRated to be wetted.
pone
nts

Unplug

On repair, make sure that all parts Check the status of parts after Check for visible traces of water on
and wires are free of dust and debris. replacement or troubleshooting. electrical parts..
• Cleaning parts could help prevent fire or • All parts must be reinstalled properly. • Replace or secure any part that may have
shorting. come in contact with water.

6
Precautions(Safety Warnings)

❈ Please let users know following warnings & cautions in detail.

Warning & Caution

Customers should not store glass Customers should not store narrow Drugs requiring precise
bottles of liquid in the freezer or long bottles or food in a small temperatures should not be stored
section. door shelf. in the refrigerator.
• These items could fall when the door is
• Frozen bottles could explode and cause injury. opened, causing injury tot he customer.

The refrigerator should be Consumers must not try to Make sure the power cord is not
plugged into a dedicated outlet. repair the refrigerator. damaged or crushed.
• Multiple plugs in the outlet could cause • Electrical and mechanical parts could • A damaged cord could cause excessive heat
excessive heat or fire. injure the consumer. or fire.

Prohibition Do not
disassemble

Customers should not store Check the location where the The refrigerator must be
articles on the product. refrigerator will be used. grounded properly.
• Opening or closing the door may cause • If the refrigerator will be used in a damp
things to fall down, which may cause or wet space, or if installation will be • An earth ground should be used if there is
injury. unstable, the unit should be relocated. a risk of high humidity or wetness.

Prohibition
Earth

7
Precautions(Safety Warnings)

FLOORING
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).

MOVING
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.

8
This document can not be used without Samsung's authorization

6. Block Diagram

6-1) Whole block diagram

6-1-1. MODEL : RF26J

DC5V~13V

101
Block Diagram

6-1-2. MODEL : RF26J

102
5. PCB DIAGRAM

5-1) PBA Layout with part position........................................................................................ 97

5-2) PBA Layout with part position (Inverter Board)...........................................................98
5-3) Connector Layout with part position (Main Board)......................................................99
5-4) Connector Layout with part position (Inverter Board)............................................... 100

96
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PCB DIAGRAM

5-1) PBA Layout with part position

1. DC12V, 5V, GND supplied from SMPS PCB (Not Used)

2. Circuit for controlling Step-Valve (3-Way Valve) * Option
3. FAN MOTOR control part : To supply the power from 8.3V ~ 12V according to the motor
types. (F,R,C,ICE)
4. EEPROM : Save and record every kinds of data.
5. Transmit inputted signals from every sensor into MICOM after eliminate the noise.
6. Micom : control the regrigerator Ceramic resonator : generate the basic frequency of Micom
operation.
Reset IC : make Micom reset if input voltage of Micom is detected less than the specified
voltage
7. PLC input/output
- PLC (Power Line communication) * Option (PLC module is not inserted unless specified
occasion)
8. Operate ICE-MAKER, supply power to MOTOR, and sense the variation of switch.
9. Main Micom ↔ Panel Micom serial communication circuit - Dispenser option input part
(Water & Cover Ice route switch)
10. Mid drawer Room display control part : display LED, detect KEY state.
11. Control Mid drawer Room damper & Damper heater
12. Water Tank Heater Controls (also controls other options)
13. LED LAMP Control Circuit (F,R room Lamp)
14. Relay parts that controls AC load and receives Micom operating signal through Sink IC.
15. Connector with AC load
a. Diode option setting area
b. Inverter COMP controlling signal
c. Flow Sensor controlling signal

97
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PCB DIAGRAM

5-2) PBA Layout with part position (Inverter Board)

1. PCB Power Supply : From the AC Input Voltage(115V), it supplies DC 15V and 5V to the
Inverter circuit for the Compressor control.
2. COMP Driving / Feedback Circuit
It receives the COMP operation signals from the Main PBA and feedbacks the inverter errors
to the Main PBA.
3. Micom (MN103SFC2D)
4. BOOTSTRAP Charger : It is an independent power circuit for the driving of the IMP High-
Phase IGBT.
5. Current Pickup Circuit : It pickups the currents taken by the Shunt resistance and does the
PWM DUTY control.
6. IPM (FNB40560)

98
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PCB DIAGRAM

5-3) Connector Layout with part position (Main Board)

5-3-1. RF26J

Main Valve

Mid DRAWER-DOOR Switch

OPEN MID DRAWER ROOM DISPLAY

ICE Pipe Heater(FF) F/B
ICE Water Pipe Heater (FF)
Mid Drawer Room LED Driver
OPEN
Mid Drawer Room Switch
OPEN
OPEN

Ice Room Heater

99
This document can not be used without Samsung's authorization

PCB DIAGRAM

5-4) Connector Layout with part position (Inverter Board)

5-4-1. RF26J

AC 115V COMP

① : DC 5V
② : GND
③ : COMP. RPM
④ : COMP.
Feedback

100
 2. Product Specifications

2-1) Introduction of Main Function......................................................................................... 10

2-2) Specifications....................................................................................................................12
2-3) Interior Views....................................................................................................................13
2-4) Model Specification..........................................................................................................14
2-5) Dimensions of Refrigerator (Inches).............................................................................. 18
2-6) Optional Material Specification....................................................................................... 19
2-7) Refrigerant Route in Refrigeration cycle.......................................................................20
2-7-1. PRINCIPLE OF FREEZEER..................................................................................21
2-7-2. Operation theory of refrigeration cycle components..................................... 22
2-7-3. Refrigeration Cycle Type.................................................................................. 24
2-8) Cooling Air Circulation.................................................................................................... 25

9
Product Specifications

2-1) Introduction of Main Function

 newly developed SAMSUNG FRENCH DOOR REFRIGERATOR in 2014 has the

A
following characteristics.

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.

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

Ice and Water Dispenser

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

10
Product Specifications

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

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.

11
 Product Specifications

2-2) Specifications

ELECTRICAL SPECIFICATIONS REFRIGERATOR

Defrost Control From 12 to 30hrs(comp. run time)
Thermo Bimetal Protector 140°F(60°C)(off) 104°F(40°C)(on)
Defrost Thermistor(502AT) 50°F(10℃)(off) Fan
Electrical Rating AC115V 60Hz 11.6 Amps
Maximum Current Leakage 0.25 mA (Air inlet) (Air inlet)

Fan
Maximum Ground Path
0.1 Ohm
Resistance
Heat exchanger
Energy Consumption 535KWh/year
Fan

(Air inlet) (Air inlet)

NO LOAD PERFORMANCE
Fan
Ambient Temperature 70℉(21°C) 90℉(32°C)
Refrigerator,℉ 44℉(7°C)~
Heat exchanger 34℉(1°C)
Freezer,℉ 5℉(-15°C)~ -8℉(-23°C)
Run Time,% < 40 < 80

REFRIGERATION SYSTEM
efrigerant Charge (R-134a) 5.64 oz(160g)
Compressor(MKV190C-L2B) 1314 Btu/hr(0.385 kw) FREEZER
Compressor Oil Freol α 15c
R Capillary tube(Dia, Length) 0.032＂,118＂(0.82mm, 3,500mm)

<RF28HFED*> Fan

Heat exchanger
Dryer C-Fan Noise Filter

(Air inlet)

Compressor Condenser Water Valve

INSTALLATION
Clearance must be provided for air circulation
AT TOP 1＂(25mm)
AT SIDES 1＂(25mm)
AT REAR 2" (50mm)

12
Product Specifications

2-3) Interior Views

Light

Door Closer

FF Ice-Maker

Foldable-Shelf

Slide Shelf
Fixed Shelf

Vertical Hinged Quick-Space

Section Glass Shelf
(on some models)

Door Bins
Vegetable &
Fruit Drawers

Cool Select
Pantry PLUS

Light

Auto Pull Out

Drawer

Freezer
Drawer Bin

13
Product Specifications

2-4) Model Specification

SAMSUNG
ITEM SPEC
RF26J*

Appearance

Cooling Tech Twin Cooling

Product Zone Door Shape Contour
Special Room Cool Select Pantry

Cooling F-Room 250↓ 202

Speed(Min) R-Room 270↓ 220
F-Room -26°C↓ -31.9
89.6 (32°C)
Performance

R-Room 2°C↓ -0.1

F-Room -18°C↓ -24.7
109.4 (43°C)
R-Room 5°C↓ 1.0
Temperature F-Room 2.0↓ 0.3
Distribution
(Fridge) R-Room 2.0↓ 1.0
Run Time N-N 90↓ 73.5
Sound Power Level 46dB↓ 45.5
Noise

Sound Pressure Level 45dB↓ 44.6

14
Product Specifications

RF26J*
ITEM Model
Ice & Water Dispenser
W 32 3/4" (830mm)
On Cabinet 29 21/32" (753mm)
D W/O Handle 34" (863mm)
External size
With Handle 36 1/2" (925mm)
W/O Hinge Cap 68 7/8 Inch (1749mm)
H
With Hinge Cap 70 Inch (1777mm)
Total 29.1 Cu.ft (824.0ℓ)
Net Capacity Freezer 8.8 Cu.ft (249.2ℓ)
Refrigerator 20.3 Cu.ft (574.8ℓ)
Efficiency of Volume 68.04%
Set 326.3 Pounds (148 kg)
Weight
Packing 352.8 Pounds (160 kg)
Width 38 5/8 Inch (980mm)
Packing Depth 36 1/8 Inch (918mm)
Height 76 5/8 Inch (1946mm)
Compressor Reciprocate
Rated voltage and Frequency AC 115 V / 60 Hz
Refrigerant R-134a
Foaming Agent C-Pentane
Refrigerant Input Amount 2.29 oz (65g)
Type Refrigerator Indirect Cooling Method Refrigerator
Motor Rated Consumption Power 120 W
Electric Heater Rated Consumption Power 489.8 W

15
 Product Specifications

Items Specification
Model MKV190CL2B/E01
Model NC4EVA5ALM/E01 / MKV190CL2B/E01
Compressor Starting type BLDC
Components for Freezer

Oil Charge FREOL α - 15c

Freezer SPLIT FIN TYPE
Evaporator
Refrigerator SPLIT FIN TYPE
Condenser Forced and Natural Convection Type
Dryer Molecular shieve XH-9
Capillary tube (Dia x Length) R:0.032" (0.082mm x 3500mm)
Refrigerant R-134a
Temperature
Model On(°F) Off(°F)
Selection
Room Temperature Sensor

Freezer

-8°F (-23°C) -5°F (-21°C) -11°F (-24°C)

THERMISTOR
-0°F (-18°C) 3°F (-16°C) -3°F (-19°C)
Components

(F-SENSOR)
5°F (-15°C) 8°F (-12°C) 2°F (-17°C)
Temperature
Model On(°F) Off(°F)
Selection
Refrigerator

34°F (1°C) 36°F (2°C) 32°F (0°C)

THERMISTOR
(R-SENSOR) 37°F (3°C) 39°F (4°C) 35°F (2°C)
502AT
44°F (7°C) 46°F (8°C) 42°F (6°C)
First Defrost Cycle (Concurrent defrost of F
6hr ±10min
Defrost Cycle

and R)
Defrost Cycle (FRE) 12~30hr (vary according to the conditions used)
Defrost Cycle (REF) 6~15hr (vary according to the conditions used)
Defrost Related Components

Pause time 12 ±1min

Model THERMISTOR (502AT)
F Defrost-Sensor
Defrost
Sensor

SPEC 5.0 ㏀ at 77℉(25℃)

Model THERMISTOR (502AT)
R Defrost-Sensor
SPEC 5.0 ㏀ at 77℉(25℃)
Rated AC 125V 6A
F Bimetal-thermo
Protector Operating
Off : 140℉(60℃) / On : 104℉(40℃)
Bimetal

temperature
Rated AC 125V, 6A
R Bimetal-thermo
Protector Operating
Off : 140°F (60°C) / On : 104°F (40°C)
temperature

16
Product Specifications

Items Specification
Model MKV190CL2B/E01
Defrost Heater(FRE) Heated at F Defrost AC120V, 230W
Defrost Heater(REF) Heated at R Defrost AC120V, 120W
Heater-Ice Maker AC120V, 141W
Interlock with French AC120V, 2.5W
DISPENSER Heater
Heater
FRENCH Heater - AC120V, 12W
R-ROOM DC12V, 2.3W
Heater Water Pipe
F-ROOM (TIM) DC12V, 2W
Heater Ice room - DC12V, 2W
Bimetal thermo for Preventing Overheating of
AC 125V 6A / Off : 60 ℃. On : 40 ℃
Refrigerator Lamp
Model 4TM308RFBYY-82 4TM445PHBYY-82
Over Load Relay Temp.ON 156.2± 16.2℉(69± 9℃) 257±41℉(125±5℃)
Electric Components

Temp.OFF 257± 9℉(125± 5℃) 156.2℉(69±9℃)

Rated Voltage AC 115V/60Hz
Motor BLDC (FRE) DC12V, 2.1W / DREP5020LC
Motor BLDC (REF) DC12V, 1.92W / 3612JL-04W-S49-G51
Motor BLDC (CIRCUIT) DC12V, 1.7W / DRCP8020LA
Motor BLDC (ICE ROOM) DC12V, 3.2W / DREP5020LB
Auger Motor AC120V, 102W / ISG-3240SSJ
Geared Motor (ICE MAKER) DC12V / GSP-24RW-001F
Geared Motor (DISPENSER) AC120V, 3.5W / MVCD18AR19
Motor DAMPER DC12V / NSBY001TJ1
Lamp LED (FRE) DC 12V / 85 ~ 130mA
DC 12V, 85~130mA
Lamp LED (REF)
DC 12V, 40~80mA
FRE DC 200V 0.5A / MDCG-4
Door Switch REF DC 200V 0.5A / MDCG-4
REF (ICE ROOM) 125VAC 5A, 250VAC 2.5A
Power Cord AC125V, 15A
Earth Screw STS304

17
 3/16"(5mm)
Model : RF26J*

34" (863mm)

1 1/4" (30.6mm)
36 1/2" (325mm)
32 3/4" (830mm)
Product Specifications

24 9/16" (624mm) 42 15/16" (1091mm) 17 5/16" (440mm) 3 7/16" (87mm) 29 21/32" (753mm)
1 7/8" (48mm) 9/16" (14mm)

70" (1777mm) 52 6/8" (1341mm)

2-5) Dimensions of Refrigerator (Inches)

18
54 1/4" (1380mm)

18 3/4" (475mm)

48" (1221mm)
Product Specifications

2-6) Optional Material Specification

Part Name Part Code AMOUNT

ASSY-PACKING SUB DA99-03490L 1

LED LAMP REF DA97-12606A 1

LED LAMP REF(SIDE) DA41-00519Q 2

LED LAMP FRE DA41-00676G 1

19
Product Specifications

2-7) Refrigerant Route in Refrigeration cycle

Compressor Condenser Hot Pipe

Back Cluster Pipe Dryer Capillary Tube Refrigerator Evaporator

ICE Pipe Freezer Evaporator Suction Pipe Compressor

20
Product Specifications

2-7-1. PRINCIPLE OF FREEZEER

21
Product Specifications

2-7-2. Operation theory of refrigeration cycle components

■Condenser
1) Role: A device which radiates heat to the outside of the refrigerator. As this heat is
dispersed, the high temperature/ high pressure vapor refrigerant changes to a
liquid state.
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. (No Fan)
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 thickness
① Low pressure: 6.3mm ② High pressure : 4.7mm ③ Capillary : About 0.4-0.8mm
※ Condenser length (Based on 300ℓ): 26.5 M
① Assistance : 5 M ② HOT-PIPE: 6.6 M ③ CLUSTER-PIPE: 4.17 M

■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 0.4-0.8ßÆ
B. Length : It is changeable to low temperature and pressure (10->5ß∏/ß≤) depends
on the 2M of thin and long copper pipe wall resistance.

22
Product Specifications

■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

2-7-3. Refrigeration Cycle Type

HM Cycle

Compressor Condenser Hot Pipe

Back Cluster Pipe Dryer Capillary Tube Refrigerator Evaporator

ICE Pipe Freezer Evaporator Suction Pipe Compressor

24
Product Specifications

2-8) Cooling Air Circulation

25
 4. TROUBLESHOOTING

4-1) Function for failure diagnosis.........................................................................................54

4-2) Diagnostic method according to the trouble symptom(Flow Chart).......................... 67

53
TROUBLESHOOTING

4-1) Function for failure diagnosis

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

• If Freezer Key + Lighting 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 operation1(FF) Manual operation2(OF r) -> manual defrost of fresh food compartments(rd)
-> manual defrost of fresh 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.

1) Manual operation function

RF26J*

Freezer Key + Lighting 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" 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, OF-r will be displayed. FF and OF-r means
manual operation 1 and 2 separately. These 2 functions operate with same 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)

Compulsion working 1 : 3600RPM Compulsion working 2 : 3600RPM

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°F(-23°C), fresh food compartment 34°F(1°C).
1-6) During manual operation, Freezer Key & Power Cool function will not be work.
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 removing power from the unit, then resupplying power.
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.

54
TROUBLESHOOTING

2) Forced Defrost

2-1) When you press any key one more time at Fridge off Forced Operation [OF r], rd lights up on the Display
Panel. At this time, the Forcd Operation stops immediately and R-Defrost will be performed at the same
time.
2-2) When you press any key one more time at Forced R-Defrost [rd], Fd lights up on the Display Panel. At this
time, FR-Defrost will be performed at the same time.
2-3) At this time, it will send out “Beep” sound for 2 seconds and then it will perform Forced F/R Defrost while
sending out “0.5 sec On and 0.5 sec Off” sound.

3) Test cancel mode

3-1) During the simultaneous defrosting of fresh food and freezer compartments, 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 and the unit will return to the normal operation.
Or, all test functions will be canceled by turning main power ON and OFF.

4-1-2. Display function of Communication error

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

1-1) If there is no answer for 10 seconds after the panel micom received the requirement of communication,
"PC - Er" or "PC - Ch" 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 - Er” or "PC - Ch" display on the Flex Zone Temp. Display will be ON/OFF alternately until the communication error
is canceled. (0.5 sec ALL ON, 0.5 sec ALL OFF alternately)

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

2-1) "oP - Er" or "oP - Ch" code is repeatedly ON/OFF until Option error settles down.

55
TROUBLESHOOTING

4-1-3. Self-diagnostic function

1) Self-diagnostic function in the Initial power ON

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 (Freezer Key + Fridge Key ) are pressed
simultaneously for 8 seconds.
(Return to normal display mode)

RF26J*

① ①

① If Freezer Key + Fridge Key are pressed simultaneously

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

2) Self-diagnostic function during normal operation

RF26J*

① ①

② If Freezer Key + Fridge Key are pressed simultaneously

for 8 seconds, the self-diagnosis function will be selected.
2-1) If Freezer Key + Fridge 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 Freezer Key + Fridge 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.

56
 TROUBLESHOOTING

※ R Self-diagnostics check list

LED
Item Trouble contents Diagnostic method
F R
When measuring the voltage between the Main
FZ-Sensor Error PCB CN30-"4" ↔ CN76-"1", it should read
between 4.5V~1.0V.
When measuring the voltage between the Main
FF-Sensor Error PCB CN30-"6" ↔ CN76-"1", it should read
between 4.6V~1.0V.
Display error : separation of sensor
FZ-DEF-Sensor housing part, contact error, disconnection, The voltage of MAIN PCB CN30- “5” ↔ N76-
Error short circuit. ”1”: shall be between 4.5V~1.0V
Display error of detecting temperature of When measuring the voltage between the Main
FF-DEF-Sensor sensor : more than 149℉(+65°C) or less PCB CN30-"8" ↔ CN76-"1", it should read
Error than -58℉(-50°C) between 4.5V~1.0V.

Ambient-Sensor The voltage of MAIN PCB CN78- “8” ↔ CN78-”

Error 12”: shall be between 4.5V~1.0V

PANTRY-Sensor The voltage of MAIN PCB CN30- “9” ↔ CN76-

Error ” 1”: shall be between 4.5V~1.0V

Display error : separation of sensor

housing part, contact error, disconnection,
Ice Maker(FZ) Sensor The Voltage of MAIN PCB CN90 #8<->#9: Shall
short circuit Display error of detecting
Error be between 4.5v ~ 1.0v
temperature of sensor: more than 149℉
(+65°C) or less than -58℉(-50°C)
When measuring the voltage between the Main
Humidity-Sensor Separation of sensor housing part,
PCB CN30-"3" ↔ CN76-"1", it should read
Error contact error, disconnection, short circuit
between 4.5V~1.0V.

Ice Maker(FF) Sensor Display error : separation of sensor The voltage of MAIN PCB CN90- “1”↔ CN90-
Error housing part, contact error, disconnection, ”7”: shall be between 4.5V~1.0V
short circuit.
or Ice Room Sensor
Display error of detecting temperature of When measuring the voltage between the Main
sensor : more than 149℉(+65°C) or less PCB CN78-"10" ↔ CN78-"12", it should read
Error
than -58℉(-50°C) between 4.5V~1.0V.
Display error during operation of
applicable fan motor : Feed back signal The voltage of MAIN PCB CN76- “3”(Yellow) ↔
FZ-FAN Error
line contact error, motor wire separation, CN76-”1”(Gray): shall be between 7V~12V
motor error
Display error during operation of
applicable fan motor : Feed back signal The voltage of MAIN PCB CN76- “4”(Orange)
FF-FAN Error
line contact error, motor wire separation, ↔ CN76-”1”(Gray): shall be between 7V~12V
motor error
Display error during operation of
applicable fan motor : Feed back signal The voltage of MAIN PCB CN76- “5”(Sky-blue)
C-FAN Error
line contact error, motor wire separation, ↔ CN76-”1”(Gray): shall be between 7V~12V
motor error
Separation of freezer compartment
After separating MAIN PCB CN70 wire from
defrost heater housing part, contact
PCB, resistance value between CN70 Brown
error, disconnection, short circuit or
↔ CN72 Gray shall be 63(230) ohm ±
FZ-DEF Error temperature fuse error. Display error :
7%.(Resistance value is varied by input power)
the defrosting does not finish though
0 ohm : heater short, ∞ ohm : wire/bimetal
freezer compartment defrost is heating
open (Must power off)
continuously for more than 80 minutes.
Separation of fresh food compartment
After separating MAIN PCB CN70 wire from
defrost heater housing part, contact
PCB, resistance value between CN70 White
error, disconnection, short circuit or
↔ CN70 Gray shall be 120(440) ohm± 7%.
FF-DEF Error temperature fuse error. Display error :
(Resistanc e value is varied by input power) 0
the defrosting does not finish though
ohm : heater short, ∞ ohm : wire/bimetal open
fresh food compartment defrost is heating
(Must power off)
continuously for more than 80 minutes.
When the Freezer Ice Maker error occurs
Ice Maker(FZ) After replacing the Ice Maker, check if it
more than 3 times, the error will be
Function Error operates normal.
displayed.

57
 TROUBLESHOOTING

※ R Self-diagnostics check list

LED
Item Trouble contents Diagnostic method
F R
After separating MAIN PCB CN77 wire from
Display error when open error is detected
PCB, resistance value between Black ↔ Brown
Pantry-Damper- by damper heater : separation of Damper
wire shall be 135 ohm± 7%.
Heater Error Heater housing part, contact error,
0 ohm : heater short, ∞ Ohm : wire / bimetal
disconnection, short circuit.
Open.
When measuring the resistance of the Main
The error occurs when there is a wire
FZ-Ice Pipe Heater PCB CN79 Yellow-Pink wires, it should be
connector slip-out of the Water Supply
within 102Ω ±7%.
Error Pipe Heater, a contact error or a
0Ω : heater short, ∞Ω : Check for Wire Open
breakage in the wiring.
or Connector Slip-out
Display error when open error is detected
Ice Maker(FF) Function After changing the Ice Maker(R), plug the
by Heater : separation of Ice Pipe Heater
refrigerator power code again, and check the
Error housing part, contact error, disconnection,
operation.
short circuit.
Display error during operation of
When measuring the voltage between the
applicable fan motor : Feed back signal
Ice Room-FAN Error Main PCB CN76-"2" ↔ CN76-"1", it should read
line contact error rnotor wire separation
between 7.0V~12V.
motor error.
Display pc - Er in the panel with alarm : Actually, If there is not a problem, it is desirable
Panel ↔ Main
MICOM MAIN ↔ PANEL communication to replace Main and Panel PCB With the
Communication Error
error. oscilloscope after a cable problem confirming.
The resistance between CN79 ORG and CN51
The Error will be displayed when the Ice
BRN on the Main PCB shall be within 135Ω ±
Duct Heater is detected as being open
Water Pipe Heater 7%. And, when the resistance reads 0Ω or ∞
due to the followings.
Error Ω, check the followings.
or - Ice Maker Duct Heater Connector Slip-
0Ω : Heater Short
Out, Contact Defect or Wire-Breakage
∞Ω : Wire-Breakage or Wire Slip-Out
The resistance between CN79 ORG and BRN
The Error will be displayed when the Ice
on the Main PCB shall be within 135Ω ±7%.
Bucket Heater is detected as being open
FF Ice Bucket Heater And, when the resistance reads 0Ω or ∞Ω,
due to the followings.
Error check the followings.
Ice Bucket Heater Connector Slip-Out,
0Ω : Heater Short
Contact Defect or Wire-Breakage.
∞Ω : Wire-Breakage or Wire Slip-Out

Comp starting Failure Check if there is a short between compressor

When the Compressor fails starting
Error terminals. Check IPM Voltage [Under 13.5V]
Check if there is a short between IPM Pins
[#1~33]
IPM Fanlt Error When there is a IPM Fault error
Check the Compressor and the Cycle

Check the Compressor connections Check the

Comp Abnormal
When ther is abnormal crrunt detected at voltage of Resistance of R308
current Detection
the Compressor [0.09Ohm] Check the Compressor and the
Error
Cycle
Check the voltage of Resistance of R308
Motor Locked Over When there is a Compressor restriction [Short/Open] Check the voltage of both of
RPM Error error C103 terminals [Unstable Voltage] Check the
Compressor and the Cycle

Comp under voltage Check the voltage of Resistance of R513 [Short/

When there is a low voltage error
Error Open]

Comp over voltage Check the voltage of Resistance of R501, R505,

When there is a over voltage error
Error R509 [Short/Open]

F R

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4-1-4. Display function of Load condition

RF26J*

①
①

① If Freezer Key + Fridge 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 Lighting, load condition mode will be started.

1) If Freezer Key + Fridge 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 Lighting Key after Freezer Key + Fridge 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. Only the load control LED will blink with 0.5interval in "Display LED"

F-10 R-10
F-1 R-1

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※ Load mode Check list

Display LED Display contents Operation contents

When FF compartment FAN operates with high speed, applicable
R-1-ⓐ R-FAN High
LED ON
When FF compartment FAN operates with low speed, applicable
R-1-ⓑ R-FAN Low
LED ON
R-1-ⓒ R-DEF Heater When FF compartment defrost heater operates, LED ON
SHOW CASE DOOR
R-1-ⓓ When Showcase Door heater operates, applicable LED ON
HEATER
R-1-ⓔ Overload condition When ambient temperature is more than 93℉(34°C), LED ON
R-1-ⓕ Low temperature condition When ambient temperature is less than 72℉(22°C), LED ON
R-1-ⓔ,ⓕ
Normal Condition When ambient temperature is between 73℉(23°C) and 91℉(33°C)
(ALL LED Off)
R-1-ⓖ Exhibition Mode LED ON at the display mode.
F-1-ⓐ COMP. When COMP operates, applicable LED ON.
When FZ compartment FAN operates with high speed, applicable
F-1-ⓑ F-FAN High
LED ON.
When FZ compartment FAN operates with low speed, applicable
F-1-ⓒ F-FAN Low
LED ON.
F-1-ⓓ F-DEF Heater When FZ compartment defrost heater operates, LED ON
When compressor FAN operates with high speed, applicable LED
F-1-ⓔ C-FAN High
ON.
When compressor FAN operates with low speed, applicable LED
F-1-ⓕ C-FAN Low
ON.
When Ice Room-FAN operates with high speed, applicable LED
F-10-ⓓ Ice Room-FAN High
ON.
When Ice Room-FAN operates with low speed, applicable LED
F-10-ⓔ Ice Room-FAN Low
ON.
F-10-ⓖ French Heater When French heater operates, applicable LED ON
R-10-ⓐ Pantry Room Damper Open When damper open, applicable LED ON
R-10-ⓓ Ice maker full When the Ice Maker's Bucket is full, applicable LED ON in FF-room
R-10-ⓔ Ice maker full When the Ice Maker's Bucket is full, applicable LED ON in FZ-room
R-10-ⓕ More Heater Add to Assy Water Pipe Heater in Fre-room

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4-1-5. Cooling OFF mode setting function

①
①
①

① If Freezer key + Alarm key + Fridge key are pressed for 5 seconds, Cooling Off mode will be started.

1) If Freezer key + Alarm key + Fridge key are pressed simultaneously for 5 seconds during normal operation,
Cooling Off mode will be started with buzzer sound(ding-dong).
2) If above Freezer key + Alarm key + Fridge key are pressed one more time, Cooling Off mode will be canceled.
3) If Cooling Off mode is selected, blinks "O-FF" on the temperature setting display of the panel and it indicates
the refrigerator has entered the Cooling Off mode.
4) During Cooling Off mode, if fresh food and freezer compartments sensors are higher than 149°F (65°C)
Cooling Off mode will be canceled automatically and freezing operation will be returned.
(There is no buzzer sound when the Cooling Off mode is canceled by the temperature)
5) Operation contents of Cooling Off 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.
-U  nder the condition of Cooling Off mode, Cooling Off mode will be operated when Power On after Power OFF.

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4-1-7. Option setting function

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

KEY operation method for changing to option mode

①
①

① If Alarm Key + Fridge Key are pressed simultaneously for 12 seconds, option setting mode will be
started.

KEY control method after converting to option mode

Reference Reference
Code Down Code Value Value Down

Reference
Code Up Value Up

※ Key control in option mode

Freezer Key Code Down key
Alarm Key Code Up key
Fridge Key Reference Value down key
Lighting Key Reference Value Up key

• 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.)

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Code Reference Value

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.

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.
NOTE You need to check the product manual and/or specification.
Code Reference Value
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.)
Code
- If fresh food compartment "0" shows Reference
only, temperature Valuevalue of freezer compartment will be set
reference
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")

Code Reference Value

Code Reference Value

: 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.

4) Option changing method as above is the same as all RFG29** 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.
Code
6) Option function is set in the EEPROM Reference
at shipping process in Value
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.
Code Reference Value
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.
NOTE (Please do not set the other options except above SERVICE Manual.)

63
Code Reference Value
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4-1-8. Option TABLE

1) Temperature changing table of freezer compartment
Set item Freezer Temp Shift
MODEL RF28HF*
Reference Fridge Room 7-SEG
Value 0

Setting value Code Reference Value

FZ compartment Temp.
Code compensation
0 0℉(0.0℃)
1 -1℉(-0.5℃)
2 -2℉(-1.0℃)
3 -3℉(-1.5℃)
4 -4℉(-2.0℃)
5 -5℉(-2.5℃)
6 -6℉(-3.0℃)
7 -7℉(-3.5℃)
8 +1℉(+0.5℃)
Code Reference Value
9 +2℉(+1.0℃)
10 +3℉(+1.5℃)
11 +4℉(+2.0℃)
12 +5℉(+2.5℃)
13 +6℉(+3.0℃)
14 +7℉(+3.5℃)
15 +8℉(+4.0℃)

2) Temperature changing table of fresh food compartment

Code Reference Value
Set item Code
Freezer Temp Shift Reference Value
MODEL RF28HF*
Reference Fridge Room 7-SEG
Value 1

Setting value
FZ compartment Temp.
Code compensation
0 0℉(0.0℃)
1 -1℉(-0.5℃)
2 -2℉(-1.0℃)
3 -3℉(-1.5℃)
Code Reference Value
4 -4℉(-2.0℃) Code Reference Value
5 -5℉(-2.5℃) ex) If you want to change
6 -6℉(-3.0℃) the freezer compartment
7 -7℉(-3.5℃) standard temperature to
8 +1℉(+0.5℃) 4℉(2°C)
9 +2℉(+1.0℃)
10 +3℉(+1.5℃)
11 +4℉(+2.0℃)
12 +5℉(+2.5℃)
13 +6℉(+3.0℃)
14 +7℉(+3.5℃)
15 +8℉(+4.0℃) Code Reference Value
Code Reference Value

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3) Operation rate changing table of dispenser heater

Set item Dispenser Heater Rate
Reference Fridge Room 7-SEG
Value 19

Setting value

  compartment
FZ
Rate change
Code
0 +0.0%
+ 20% operation
1
( up to 100% )

Code Reference Value

ex) If you want to change the dispenser heater operation rate
to +20%

4) Temperature changing table of Pantry/Room

Code Reference Value
Set item Pantry/Mid Drawer Room Temp Shift
Reference Fridge Room 7-SEG
Value 20

Code Reference Value

Setting value

  compartment
FZ Temp.
compensation
Code

0 0℉(0.0℃)
1 -1℉(-0.5℃) Code Reference Value
2 -2℉(-1.0℃)
3 -3℉(-1.5℃)
4 -4℉(-2.0℃)
5 +1℉(+0.5℃)
6 +2℉(+1.0℃)
7 +3℉(+1.5℃)
Code Reference Value

ex) If you want to change the mid drawer room temperature to
-2℉(-1.0℃)

Code Reference Value

Code Reference Value

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5) Temperature changing table of ICE ROOM compartment

Set item Freezer Temp Shift
MODEL RF28HF*
Reference Fridge Room 7-SEG
Value 34

Setting value
FZ compartment Temp.
Code compensation
0 0℉(0.0℃)
1 -1℉(-0.5℃)
2 -2℉(-1.0℃)
3 -3℉(-1.5℃)
4 -4℉(-2.0℃)
5 -5℉(-2.5℃)
6 -6℉(-3.0℃)
7 -7℉(-3.5℃)
8 +1℉(+0.5℃)
9 +2℉(+1.0℃)
10 +3℉(+1.5℃)
11 +4℉(+2.0℃)
12 +5℉(+2.5℃)
13 +6℉(+3.0℃)
14 +7℉(+3.5℃)
15 +8℉(+4.0℃)

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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 : based on PX41C, PX41C, 502AT/ 103**(ICE MAKER SENSOR(MOLD)/FULL UP, 20Kohm
( Actual measurement = value of the table below X 2 )

℃ ℉ Voltage Resistance ℃ ℉ Voltage Resistance ℃ ℉ Voltage Resistance

-50 -58 4.694 153319 -5 23 3.107 16419 40 104 1.153 2997
-49 -56.2 4.677 144794 -4 24.8 3.057 15731 41 105.8 1.124 2899
-48 -54.4 4.659 136798 -3 26.6 3.006 15076 42 107.6 1.095 2805
-47 -52.6 4.641 129294 -2 28.4 2.955 14452 43 109.4 1.068 2714
-46 -50.8 4.622 122248 -1 30.2 2.904 13857 44 111.2 1.040 2627
-45 -49 4.602 115631 0 32 2.853 13290 45 113 1.014 2543
-44 -47.2 4.581 109413 1 33.8 2.802 12749 46 114.8 0.988 2462
-43 -45.4 4.560 103569 2 35.6 2.751 12233 47 116.6 0.963 2384
-42 -43.6 4.537 98073 3 37.4 2.700 11741 48 118.4 0.938 2309
-41 -41.8 4.514 92903 4 39.2 2.649 11271 49 120.2 0.914 2237
-40 -40 4.490 88037 5 41 2.599 10823 50 122 0.891 2167
-39 -38.2 4.465 83456 6 42.8 2.548 10395 51 123.8 0.868 2100
-38 -36.4 4.439 79142 7 44.6 2.498 9986 52 125.6 0.846 2036
-37 -34.6 4.412 75077 8 46.4 2.449 9596 53 127.4 0.824 1973
-36 -32.8 4.385 71246 9 48.2 2.399 9223 54 129.2 0.803 1913
-35 -31 4.356 67634 10 50 2.350 8867 55 131 0.783 1855
-34 -29.2 4.326 64227 11 51.8 2.301 8526 56 132.8 0.762 1799
-33 -27.4 4.296 61012 12 53.6 2.253 8200 57 134.6 0.743 1745
-32 -25.6 4.264 57977 13 55.4 2.205 7888 58 136.4 0.724 1693
-31 -23.8 4.232 55112 14 57.2 2.158 7590 59 138.2 0.706 1642
-30 -22 4.199 52406 15 59 2.111 7305 60 140 0.688 1594
-29 -20.2 4.165 49848 16 60.8 2.064 7032 61 141.8 0.670 1547
-28 -18.4 4.129 47431 17 62.6 2.019 6771 62 143.6 0.653 1502
-27 -16.6 4.093 45146 18 64.4 1.974 6521 63 145.4 0.636 1458
-26 -14.8 4.056 42984 19 66.2 1.929 6281 64 147.2 0.620 1416
-25 -13 4.018 40938 20 68 1.885 6052 65 149 0.604 1375
-24 -11.2 3.980 39002 21 69.8 1.842 5832 66 150.8 0.589 1335
-23 -9.4 3.940 37169 22 71.6 1.799 5621 67 152.6 0.574 1297
-22 -7.6 3.899 35433 23 73.4 1.757 5419 68 154.4 0.560 1260
-21 -5.8 3.858 33788 24 75.2 1.716 5225 69 156.2 0.546 1225
-20 -4 3.816 32230 25 77 1.675 5039 70 158 0.532 1190
-19 -2.2 3.773 30752 26 78.8 1.636 4861 71 159.8 0.519 1157
-18 -0.4 3.729 29350 27 80.6 1.596 4690 72 161.6 0.506 1125
-17 1.4 3.685 28021 28 82.4 1.558 4526 73 163.4 0.493 1093
-16 3.2 3.640 26760 29 84.2 1.520 4369 74 165.2 0.481 1063
-15 5 3.594 25562 30 86 1.483 4218 75 167 0.469 1034
-14 6.8 3.548 24425 31 87.8 1.447 4072 76 168.8 0.457 1006
-13 8.6 3.501 23345 32 89.6 1.412 3933 77 170.6 0.446 978
-12 10.4 3.453 22320 33 91.4 1.377 3799 78 172.4 0.435 952
-11 12.2 3.405 21345 34 93.2 1.343 3670 79 174.2 0.424 926
-10 14 3.356 20418 35 95 1.309 3547 80 176 0.414 902
-9 15.8 3.307 19537 36 96.8 1.277 3428 81 177.8 0.404 877
-8 17.6 3.258 18698 37 98.6 1.253 3344 82 179.6 0.394 854
-7 19.4 3.208 17901 38 100.4 1.213 3204 83 181.4 0.384 832
-6 21.2 3.158 17142 39 102.2 1.183 3098 84 183.2 0.375 810

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DATA2. Humidity Sensor table

- Voltage output table @23°…, 5Vdc --- HTG3515CH/HTG3535CH
RH(Temperature compensate ) = RH (Relative Humidity ) + ( Temp(°C) °© 23°C) x 0.05

℃ ℉ Voltage Resistance ℃ ℉ Voltage Resistance ℃ ℉ Voltage Resistance

0 909 186 744 46 2246 460 1839 92 3452 706 2827
1 943 193 772 47 2272 465 1861 93 3478 712 2848
2 977 200 800 48 2298 470 1882 94 3504 717 2870
3 1010 207 827 49 2324 475 1903 95 3530 722 2891
4 1043 213 854 50 2350 481 1925 96 3566 730 2920
5 1076 220 881 51 2376 486 1946 97 3595 735 2944
6 1109 227 908 52 2402 491 1967 98 3624 741 2968
7 1141 233 935 53 2428 497 1989 99 3653 747 2992
8 1173 240 961 54 2454 502 2010 100 3683 754 3016
9 1205 247 987 55 2480 507 2031
10 1235 253 1011 56 2505 513 2052
11 1266 259 1037 57 2530 518 2072
12 1297 265 1062 58 2555 523 2093
13 1328 272 1088 59 2580 528 2113
14 1359 278 1113 60 2605 533 2133
15 1390 284 1138 61 2630 538 2154
16 1420 291 1163 62 2655 543 2174
17 1450 297 1188 63 2680 548 2195
18 1480 303 1212 64 2705 553 2215
19 1510 309 1237 65 2730 559 2236
20 1540 315 1261 66 2756 564 2257
21 1569 321 1285 67 2782 569 2278
22 1598 327 1309 68 2808 575 2300
23 1627 333 1333 69 2834 580 2321
24 1656 339 1356 70 2860 585 2342
25 1685 345 1380 71 2886 590 2364
26 1713 350 1403 72 2912 596 2385
27 1741 356 1426 73 2938 601 2406
28 1769 362 1449 74 2964 606 2428
29 1797 368 1472 75 2990 612 2449
30 1825 373 1495 76 3017 617 2471
31 1852 379 1517 77 3044 623 2493
32 1879 384 1539 78 3071 628 2515
33 1906 390 1561 79 3098 634 2537
34 1933 395 1583 80 3125 639 2559
35 1960 401 1605 81 3152 645 2581
36 1986 406 1627 82 3179 650 2604
37 2012 412 1648 83 3206 656 2626
38 2038 417 1669 84 3233 661 2648
39 2064 422 1690 85 3260 667 2670
40 2090 428 1712 86 3288 673 2693
41 2116 433 1733 87 3316 678 2716
42 2142 438 1754 88 3344 684 2739
43 2168 444 1776 89 3372 690 2762
44 2194 449 1797 90 3400 696 2785
45 2220 454 1818 91 3426 701 2806

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

- 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 not operated 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.
1) If ICE Maker(R) Sensor has troubled
ERROR Code

Start

DATA1. Is MAIN PCB Connector NO

Temperature table CN90 inserted correctly?

** Measuring point of resistance value according to

YES Bad contact of connector/ insert correctly
Sensor **
Is ICE Maker Sensor NO
ICE MAKER: CN90 ”1” ↔ “7” measuring resistance
value ** 0Ω : Short trouble / Ω∞ : Open trouble unit normal?
Refer to circuit diagram in the manual YES Replace the temperature sensor
Sensor MICOM/Connector number
Is the voltage between NO(0.6V > Measurement < 4.6V)
ICE Connector CN90-"1"(Brown)and MAIN PCB Connector CN90 - "1"(Brown) and
Maker J23 JUMMPER PCB typical Ground J23 JUMMPER normal?
Voltage measured between 4.6V ~ 0.6V. YES Recheck the wire connection part
Measuring voltage of IC01 MICOM #71, Is input voltage of IC01 NO
CN90 - "1" (Brown) and J23 JUMMPER from
MICOM #71 normal?
PCB typical Ground part are similar.
→ Check the measure on the voltage of Resistance,
R914 DUE to the SMD MICOM YES Check the iced-solder, solder
No trouble with PCB and temperature sensor. bridging, disturbed solder.
Recheck the bad contact of the connection.

☞ Checking method of ICE Maker Sensor resistance ☞ Checking method of ICE Maker Sensor resistance
CN90 "1"(Brown) ↔ "7"(Gray) - Measure the voltage of Resistance R914(IC01 MICOM
- Compare the temperature table after the #71) on PCB or CN90 "1"(Brown) ↔ J23 JUMMPER
measure. - Compare the temperature table after the measure.
Measuring voltage of CN90-"1"(Brown) ↔ J23 PCB Typical Ground
JUMMPER are as below. J23 JUMMPER

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3) If R DEF Sensor has trouble

ERROR Code

Start

Is MAIN PCB NO
DATA1.
Connector CN30 and CN76 inserted
Temperature table correctly?
YES Bad contact of connector/ insert correctly
** Measuring point of resistance value according to
Sensor ** Is R Sensor NO
R : CN30 - “6” ↔ CN76-"1" measuring resistance value
** 0Ω : Short trouble / Ω∞ : Open trouble
unit normal?

Refer to circuit diagram in the manual

YES Replace the temperature sensor
Is the voltage between NO(0.6V > Measurement < 4.6V)
Sensor MICOM/Connector number MAIN PCB Connector CN30 - “6”(White) and
Connector CN30 - “6”(White) to J23 JUMMPER normal?
R J23 JUMMPER PCB typical Ground
Voltage measured between 4.6V ~ 0.6V. YES Recheck the wire connection part
Is the input voltage of NO
Measuring voltage IC01 MICOM #84,
CN30 - “6”(White) and J23 JUMMPER IC01 MICOM #84 normal?
from PCB typical Ground part are similar.
→ Check the measure on the voltage of Resistance, YES Check the iced-solder, solder
R311 due to the SMD MICOM bridging, disturbed solder.
No trouble with PCB and temperature sensor.
Recheck the bad contact of the connection.

☞ Checking method of R Sensor resistance ☞ Checking method of R Sensor resistance

CN30 - “6”(White) ↔ CN76-"1"(Gray) Compare the - Measure the voltage of Resistance R311(IC01 MICOM
temperature table after measurment. #84) on PCB or CN30 - “6”(White) ↔ J23 JUMMPER PCB Typical Ground
- Compare the temperature table after measurement. J23 JUMMPER
Measuring voltage of CN30 - “6”(White) ↔ J23
JUMMPER are as below.

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4) If R DEF Sensor has trouble

ERROR Code

Start

DATA1. Is MAIN PCB NO

Connector CN30 and CN76 inserted
Temperature table correctly?
** Measuring point of resistance value according to YES Bad contact of connector/ insert correctly
Sensor **
R-DEF : CN30-"8" ↔ CN76-"1" measuring Is R DEF Sensor NO
resistance value
** 0Ω : Short trouble Ω∞ : Open trouble unit normal?
Refer to circuit diagram in the manual YES Replace the temperature sensor
Sensor MICOM/Connector Number
Is the input voltage between NO(0.6V > Measurement < 4.6V)
Connector CN30-"8"(Sky-blue) and MAIN PCB Connector CN30-”8”(Skyblue)
R DEF J23 JUMMPER PCB typical Ground
and J23 JUMMPER normal?
Voltage measured between 4.6V ~ 0.6V.
YES Recheck the wire connection part
Measuring voltage of IC01 MICOM #86 Is the input voltage of IC01 NO
CN30-"8"(Sky-blue) and J23 JUMMPER from MICOM # 86 normal?
PCB typical Ground part are similar.
→ Check the measure on the voltage of Resistance R313
due to the SMD MICOM YES Check the iced-solder, solder
No trouble with PCB and temperature sensor. bridging, disturbed solder.
Recheck the bad contact of the connection.

☞ Checking method of R Sensor resistance CN30- ☞ Checking method of R DEF Sensor resistance
"8"(Sky-blue) ↔ CN76-"1"(Gray) - Measure the voltage of Resistance R313(IC01 MICOM #86) on
- Compare the temperature table after PCB or CN30-”8”(Sky-blue) ↔ J23 JUMMPER PCB Typical Ground
measurement. - Compare the temperature table after measurement. J23 JUMMPER
Measuring voltage of CN30-”8”(Sky-blue) ↔ J23 JUMMPER
are as below.

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5) If Ambient Sensor has trouble

ERROR Code

Start

DATA1. Is NO
MAIN PCB Connector CN78 inserted
Temperature table correctly?

** Measuring point of resistance value according to YES Bad contact of connector/ insert correctly
Sensor **
Ambient : CN78-”8” ↔ “12” measuring resistance value Is NO
** Placed in the right top table of upper hinge. Ambient Sensor unit
** 0Ω : Short trouble / Ω∞ : Open trouble normal?
Refer to circuit diagram in the manual YES Replace the temperature sensor
Sensor MICOM/Connector number
Is the voltage between NO(0.6V > Measurement < 4.6V)
Connector
Ambient J23 JUMMPERCN78-"8"(Yellow) to MAIN PCB Connector CN78 ”8”(Yellow)
PCB typical Ground and J23 JUMMPER normal?
Voltage measured between 4.6V ~ 0.6V.
YES Recheck the wiring connection
Measuring voltage of IC01 MICOM #93 Is the NO
CN78-"8"(Yellow) and J23 JUMMPER from input voltage of IC01 MICOM #93
PCB typical Ground part are similar.
normal?
→ Check the measure on the voltage of Resistance,
R315 due to the SMD MICOM
YES Check the iced-solder, solder
No trouble with PCB and temperature sensor bridging, disturbed solder
Recheck the bad contact of the connection

☞ Checking method of Ambient Sensor resistance ☞ Checking method of Ambient Sensor voltage
CN78-”8”(Yellow) ↔ "12"(Yellow) - Measure the voltage of Resistance R315(IC01 MICOM #93) on
- Compare the temperature table after measurement. PCB or CN78-"8"(Yellow) ↔ J23 JUMMPER PCB Typical Ground
- Compare the temperature table after measurement. J23 JUMMPER
Measuring voltage of CN78-"8"(Yellow) ↔ J23 JUMMPER are as
below

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6) If F Sensor has trouble

ERROR Code

Start

DATA1. Are MAIN PCB NO

Connector CN30 and CN76
Temperature table inserted correctly?
YES Bad contact of connector/ insert correctly
** Measuring point of resistance value according to
Sensor ** NO
F : CN30-”4” ↔ CN76-”1” measuring resistance value IS
** 0Ω : Short trouble / Ω∞ : Open trouble F Sensor unit normal?
Refer to circuit diagram in the manual YES Replace temperature sensor
Sensor MICOM/Connector number
Is the voltage between NO(0.6V > Measurement < 4.6V)
F Connector CN30-”4”(Red) to MAIN PCB Connector CN30-”4”(Red) and
J23 JUMMPER PCB typical Ground J23 JUMMPER normal?
Voltage measured between 4.6V ~ 0.6V.
YES Recheck the wiring connection
Measuring voltage of IC01 MICOM #82, NO
CN30-”4”(Red) and J23 JUMMPER from Is the input voltage of
PCB typical Ground part are similar. IC01 MICOM #82 normal?
→ Check the measure on the voltage of Resistance,
R309 due to the SMD MICOM YES Check the iced-solder, solder
No trouble with PCB and temperature sensor bridging, disturbed solder
Recheck the bad contact of the connection

☞ Checking method of F Sensor resistance CN30- ☞ Checking method of F Sensor voltage

- Measure the voltage of Resistanec, R309(IC01 MICOM #82) on PCB or
"4"(Red) ↔ CN76-"1"(Gray) CN30-"4"(Red) ↔ J23 JUMMPER
- Compare the temperature table after measurement. - Compare the temperature table after measurement. PCB Typical Ground
Measuring voltage of CN30-"4"(Red) ↔ J23 JUMMPER are as below. J23 JUMMPER

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7) If F DEF Sensor has trouble

ERROR Code

Start

DATA1.
Are NO
MAIN PCB Connector CN30 and CN76
Temperature table insert correctly?
** Measuring point of resistance value according to YES Bad contact of connector/ insert correctly
Sensor **
F-DEF : CCN30-”5” ↔ CN76-”1” measuring resistance IS NO
value FZ DEF Sensor unit
** 0Ω: Short trouble / Ω∞ : Open trouble normal?
Refer to circuit diagram in the manual YES Replace temperature sensor
Sensor MICOM/Connector number
Is the voltage between NO(0.6V > Measurement < 4.6V)
Connector
F DEF J23 JUMMPERCN30-"5"(Orange) to MAIN PCB Connector CN30-”5”(Orange) and
PCB typical Ground J23 JUMMPER normal?
Voltage measured between 4.6V ~ 0.6V.
YES Recheck the wiring connection
Measuring voltage of IC01 MICOM #83, Is the input voltage of NO
CN30-"5"(Orange) and J23 JUMMPER from IC01 MICOM #83 normal?
PCB typical Ground part are similar.
→ Check the measure on the voltage of Resistance,
R310 due to the SMD MICOM
YES Check the iced-solder, solder
No trouble with PCB and temperature sensor. bridging, disturbed solder
Recheck the bad contact of the connection.

☞ Checking method of F DEF Sensor resistance ☞Checking method of F DEF Sensor voltage
CN30-"5"(Orange) ↔ CN76-”1”(Gray) - Measure the voltage of Resistance, R310(IC01 MICOM #83) on PCB
or CN30-"5"(Orange) ↔ J23 JUMMPER
- Compare the temperature table after - Compare the temperature table after measurement. PCB Typical Ground
measurement. Measuring voltage of CN30-"5"(Orange) ↔ J23 JUMMPER are as below J23 JUMMPER

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8) If Ice Room Sensor has trouble

ERROR Code

Start

DATA1. Is MAIN PCB NO

Connector CN78 and CN76 inserted
Temperature table correctly?
** Measuring point of resistance value according to YES Bad contact of connector/ insert correctly
Sensor **
Ambient : CN78 ”10” ↔ CN76-”1” Measure the voltage Is NO
of Resistance value Ice room sensor unit
** 0Ω : Short trouble / Ω∞ : Open trouble normal?
Refer to the circuit diagram in this manual YES Replace temperature sensor
Sensor MICOM/Connector number
Is the voltage between NO(0.6V > Measurement < 4.6V)
Connector CN78-"10"(Orange) and
Ice Room J23 JUMMPER MAIN PCB Connector CN78-"10"(Orange) and
from PCB Typical Ground J23 JUMMPER normal?
Voltage measured between 4.6V ~ 0.6V.
YES Check the wiring connection
Measuring voltage of IC01 MICOM #92, Is the input voltage of NO
CN78-"10"(Orange) and J23 JUMMPER from IC01 MICOM #92 normal?
PCB Typical Ground are similar.
→ Check the measure on the voltage of Resistance,
R316 due to the SMD MICOM
YES Check the iced-solder, solder
No trouble with PCB and temperature sensor. bridging, disturbed solder
Check the bad connections.

☞ Checking Mehod of Ice Room Sensor voltage ☞Checking Method of Ice Room Sensor Voltage
- Measure the voltage of Resistance, R316(IC01 MICOM #92) on PCB or
CN78-"10"(Orange) ↔ CN76-”1” (Gray) CN78-"10"(Orange) ↔ J23 JUMMPER
- Compare with the temperature table after - Compare with the temperature table after measurement. PCB Typical Ground
measurement. Measured voltage of CN78-"10"(Orange) ↔ J23 JUMMPER are as below J23 JUMMPER

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9) If PANTRY Sensor has trouble

ERROR Code

Start

DATA1. Is MAIN PCB NO

Connector CN30 and CN76 insert
Temperature table correctly?
YES Bad contact of connector/ insert correctly
** Measuring point of resistance value according to Sensor
** NO
Flex : CN30 ”9” ↔ CN76 ”1” measuring resistance value Is Pantry Sensor
** 0Ω : Short trouble / Ω∞ : Open trouble normal?
Refer to circuit diagram in the manual YES Replace temperature sensor
Sensor MICOM/Connector number
Is the voltage between NO(0.6V > Measurement < 4.6V)
Connector CN30-"9"(Yellow) to
Pantry J23 JUMMPER MAIN PCB Connector CN30-"9"(Yellow)
PCB typical Ground and J23 JUMMPER normal?
Voltage measured between 4.6V ~ 0.6V.
YES Recheck the wiring connection
Measuring voltage of IC01 MICOM #87,
Is the input voltage of IC01 NO
CN30-"9"(Yellow)and J23 JUMMPER
from PCB typical Ground part are similar. MICOM Pin #87 normal?
→ Check the measure on the voltage of Resistance, R314
due to the SMD MICOM YES Check the iced-solder, solder
No trouble with PCB and temperature sensor. bridging, disturbed solder
Recheck the bad contact of the connection.

☞ Checking method of PANTRY Sensor resistance CN30-

☞ Checking method of PANTRY Sensor resistance "9"(Yellow) ↔ CN76-”1” (Gray)
CN30-"9"(Yellow) ↔ CN76-”1” (Gray) - Compare the temperature table after measurement.
- Compare the temperature table after measurement. PCB Typical Ground
Measuring voltage of CN30-"9"(Yellow) ↔ J23 JUMMPER are
as below
J23 JUMMPER

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TROUBLESHOOTING

10) If Humidity Sensor has trouble

ERROR Code

Start

Is MAIN PCB NO
Connector CN30 inserted
correctly?
** Measuring point of resistance value according to YES Bad contact of connector /insert correctly
Sensor"
Humidity : CN30 ”1” ↔ ”3” NO
Resistance value with opened : about 50 Ω Is Humidity Sensor
** 0Ω : Short trouble / Ω∞ : Open trouble unit normal?
Refer to circuit diagram in the manual Replace the Humidity Sensor
YES
Sensor MICOM/Connector number DATA2. Humidity Sensor Table
Is the voltage between NO (1.0V > Measurement < 3.5V)
Humidity Connector CN30-"3"(brown) to
J23 JUMMPER PCB typical Ground
MAIN PCB Connector CN30-”3”(Brown) and
J23 JUMMPER normal?
Voltage measured between 3.5V ~ 1.0V
YES Recheck the PCB & Wire Terminal connection
Measuring voltage of ICO1 MICOM #81, Is input voltage of NO
CN30-"3"(Brown) and J23 JUMMPER from ICO1 MICOM #81 normal?
PCB typical Ground part are similar.
→ Check the voltage of Resistance, R321
YES Check the iced-solder, solder
bringing, disturbed solder
No trouble with PCB temperature sensor.
Exchange the PCB
Recheck the bad contact ofthe connection

☞ Checking method ofHumidity Sensor voltage.

☞ Checking method ofHumidity Sensor resistance - Measure the voltage of Resistance, R321(IC01 MICOM #81)
CN30-"3"(Brown) ↔ "1"(Gray) on PCB or CN30-"3"(Brown) ↔ J23 JUMMPER
- Compare the temperature table after the measure. PCB Typical Ground
- Compare the temperature table after the measure. Measuring voltage of CN30-"3"(Brown) ↔ J23 JUMMPER
are below J23 JUMMPER

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11) PANTRY Room Damper Heater has trouble(OPTION)

ERROR Code

Start

Is Damper Heater NO
normal?(about135ohm)

YES Bad contact of connector/ insert correctly

Measure the voltage of Resistance NO
Is MAIN PCB connector
between ① - ② after
(CN77) inserted correctly?
CN77 connector open / 680 ohm ± 7%
YES 1) Wire connector
Initial Working 2) Replace Heater
MICOM power On Heater off heater NO
#56 Is the input voltage of
condition 3.5V ~ 3.5V ~ 0V IC01 MICOM #56 normal?
4.8V 4.8V
YES 1) Recheck the wire
2) Replace PCB MAIN
Normal(recheck)

☞ Checking method of Flex Zone Room Damper

resistance CN77-"1"(Black) ↔ "2"(Brown)
** Ω∞ : Open (wire disconnection, heater
disconnection) trouble / 0 Ω : Short trouble

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TROUBLESHOOTING

4-2-2. If FAN does not operate

- 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.

Start

Is COMPRESSOR ON ?

Execute manual
operation

Is the voltage between MAIN Is the voltage between MAIN Is the voltage between MAIN
PCB Ground J23 JUMMPER and CN PCB Ground J23 JUMMPER and CN PCB Ground J23 JUMMPER and CN 76
76”5”(Sky -blue) around DC7~12V? 76”4” (Orange) around DC7~12V? ”3” (Yellow) around DC7~12V?
FAN work normally
Is the voltage between MAIN Is the voltage between MAIN
Is the external temperature PCB Ground J23 JUMMPER and CN76-
above 66.2 ℉(19℃ )? PCB Ground J23 JUMPER and CN
76-"12"(Purple) around 0V? "11" (White) around 4.5~5V?
Repair the connection
of Door switch
Recheck after 7 minutes Door & MICOM State
(Time could be delayed
depending on the F MICOM R MICOM(#28)
Door
temperatures. If the (#29) Right and Left
temperature is lower, It Power ON with 7 minutes delay In initial power to appliance, the compressor
may not operate : about Close 0V(Low) 0V(Low) after power OFF.
For preventing the over load of and fans of fresh food/ freezer, compressor
59℉ (below 15 ℃) Open 5V(High) 5V(High) compressor) fan operate. If freezer temperature is sensed
of 41℉by momentary power failure, fans will
operate after 7 minutes.

Does DC7~12V alternate with Does DC7~12V alternate with below Does DC7~12V alternate with
below DC 2V between MAIN PCB Ground J23 DC 2V between MAIN PCB Ground J23 below DC 2V between MAIN PCB Ground
JUMMPER and CN76 ”5”(Sky-blue) JUMMPER and CN76 ”4”(Orange) J23 JUMMPER and CN76 “3”(Yellow)
Replace MAIN PCB Ground

F FAN pulse voltage PCB Typical Ground Reference

CN76 “7”(Brown) J23 JUMMPER
CN76-7(F),8(R),9(C)will generate the pulse signal when motor rotates.
These signals will be inputted into MICOM. • Expected causes
Unless signals are not inputted during motor operating, will be ON 10 ① Check that if FAN-MOTOR has failure itself.
seconds after fan Off. But if signals are not still entered, the above ② Check that if wiring connection has bad contact.
operation will restart four times more. ③ Check the input of the fan motor rotation pulse
If signals are not entered continuously, the motor will be restarted after 10 when motor fan operates.
Minutes. This function is effective when the normal operation of motor
The voltage measured around 2~3V
with multi-meter though the voltage is would be restrained by foreign matters such as ice.
very weak because of pulse signal
The voltage between PCB typical Ground J23 JUMMPER and PCB Typical Ground
☞ Display for checking the self-diagnostic function J23 JUMMPER
F FAN ; CN76 ”3”(Yellow) shall be less than DC 7~12V.
R FAN ; CN76 ”4”(Orange) shall be less than DC 7~12V.
R FAN ERROR
(Option) F FAN ERROR C FAN ERROR C FAN ; CN76 ”5”(Sky-blue) shall be less than DC 7~12V.
- Recheck if resistance values are different after measuring.

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

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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.

- When pressing the ICE TEST S/W for a certain period of time (over
1.5sec), the function is accomplished. After beginning of TEST
Start
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 No
Is COMPRESSOR ON ?
then Ice maker motor turns on.
- As the Ice maker motor turns on, TEST MODE COUNT operates.
Execute manual operation
(6 minutes count) Yes
Condition
- Ambient temperature : 32 ℃ /75%
- Notch : 2 ℉ /38℉ (-19.0 ℃/3.3 ℃) Is the voltage between
MAIN PCB Ground J23 JUMMPER Yes
Initial full of ice bucket capacity : 794 g, 58ea
and CN76-”2” (Black) around
DC7~12V? FAN works normally
No

Ice Room control temperature Is the Ice No

Ice ON 8.6 ℉(-13 ℃ ) Room temperature suitable for
the Fan working?
Ice OFF 26.6 ℉(-3 ℃ ) Operation
Yes temperature/ready
Reference
CN76 “6” will generate the pulse signal when motor rotates. Does DC7~12V alternate
These signals will be input into MICOM.
with below DC2V between MAIN No
Unless signals are not input during motor operating, will be ON
10seconds after fan OFF. But if signals are not still taken, the above PCB Ground J23 JUMMPER
operation will be retried four times more. If signals are not taken and CN76-"2"(Black)?
continuously, the motor will be restarted after 10 minutes. Replace MAIN PCB
This function is against the case that motor movement would be Yes Ground
restrained by foreign matters like ice.

※ Predicted Cause
FAN pulse voltage PCB Typical Ground
① FAN-MOTOR troubles itself
② Bad wiring connections.
CN76-”6”(Pink) J23 JUMMPER

③ Wrong Input of the fan motor rotation pulse

The voltage is variable due to pulse signal ☞ Checking method of Ice Room FAN Motor Voltage with the voltage between Ice Room FAN ;
but measured about 2~3V with the Multi- CN76-"1"(Gry) shall be less than DC 7~12V.
Meter.
- Ice Room FAN Motor Voltage shall be less than DC 7~12V.
1) Ice Room - FAN
PCB Typical Ground
☞ Display for checking the self-diagnostic function J23 JUMMPER
Ice Room FAN ERROR

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 TROUBLESHOOTING

4-2-4. When ICE MAKER(FF) does not operate

1. Water will be automatically supplied to the Ice Maker depending on temperature & time conditions, and ice will be
produced to dispense.
2. Power is applied to one end of the wires. So, make sure to refer to its Exploded View whenever doing the
disassembly.
3. The operation of the Ice Maker shall be done after pressing the Ice Maker Test Button.
(Fridge Ice Maker) It is not possible to check when the power is off.
4. Since both of the PCB and the Ice Maker are located at the front and the back each other, make sure to have two
people check them.
5. It may cause burn when the Ice Maker Heater heats up. So, please take an extra caution.
6. The Ice Maker has a counter-clockwise rotation function. So, its counter-clockwise rotation is normal.

Displays ERROR Code Opration Condition while Motor is rotating

Micom(IC01) Operation Status
Stand-by On
Motor Load (#74) 0V 5V
Start Heater Load (#118) 0V 5V
Heater operates differently according to the
conditions. Test Mode operation will be 30 sec.

Micom(IC01) Operation Status

Ice Maker rotates when No
#7 Stand-by On pressing the Ice Maker testing
(Test Switch) switch (over 1.5 sec)?
5V 0V
Yes
1) Check & Replace ICE MAKER KIT
2) Check Main PCB Input Signal &
Replace it (Micom IC01 Pin #7 - "0V")
Micom(IC01) Operation Status
Before Input Voltage of IC01 MICOM No
Standby Rotation Completed
finishing #73 is normal?
#73 (Blade
0V 4.9V 4.9V 0V
Ice Scoop) Yes 1) Check Wire Connection
2) Check & Replace ICE MAKER KIT
3) Check & Replace MAIN PCB

Ice maker Operation Status Is the water supplied in 6 No

minutes (After detecting the full
Home → Motor CCW Rotation → Motor bucket and its horizontality)?

CW Rotation → Water Supply → Normal Yes

('Ding Dong' Sound) 1) Check & Replace Water Valve
* Refer to Water Valve Operating
Conditions
2) Check & Replace Main PCB
Is the ICE Maker Sensor No
normal?

Yes
1) Check & Repair ICE Maker Sensor
* Refer to it when ICE Maker Sensor is
defective
PCB & Ice Maker Related Parts are
normal.
Check all the Wire Connections again.

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TROUBLESHOOTING

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

R DEF ERROR F DEF ERROR

Start

**Measuring point of resistance value according to heater**

F-DEF : CN70 “3”(Brown) ↔ CN72 ”3” (Gray) measuring
resistance value(63 ohm ± 7%) Are the all deforst
R-DEF : CN70 ”1”(White) ↔ CN72 “3”(Gray) measuring resistance heater normal?
value(120 ohm ± 7%)
** 0Ω : Short trouble / Ω∞ : Open(bimetal, heater) trouble
Check the bimetal, heater
disconnection, wiring connection etc.
Refer to self-diagnostic
Is defrost sensor by function in the manual
Reference to the manual “Self-Diagnostic” self-diagnostic normal?
Replace the
applicable sensor

**Measuring point of resistance value according to sensor **

F-DEF : CCN30-”5” ↔ CN76-”1” measuring resistance value Is the temperature of
R-DEF : CN30-”8” ↔ CN76-”1” measuring resistance value defrost sensor lower
** 0Ω : Short trouble / Ω∞ : Open trouble than 53.6 ℉(12°C)? manual operation for a certain time

Resistance value of sensor according to temperature

86℉(30℃) 4.22k Ω
68℉(20℃) 6.05k Ω Manual defrosting of fresh food If Energy Saver + Fridge Key are pressed simultaneously for 8
50℉(10℃) 8.87k Ω If you need the and freezer compartments
operate simultaneously. seconds and then select any key, 3rd test mode(manual
32℉(0℃) 13.29k Ω temperature with detail,
defrosting) will be operated.
14℉(-10℃) 20.42k Ω refer to DATA1. temperature
-4 ℉(-20℃) 32.23k Ω table
-22 ℉(-30 ℃) 52.41k Ω
Is power applied to
each defrost heaters?

Does the system return

to cooling operation after heating for
Recheck the applicable specified time?
sensor.
Reference If defrost sensor
temperatures of fresh food and Normal
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.
Is connection terminal of
MAIN PCB part normal?
☞Checking method of F,R DEF Heater resistance value Repair connection terminal
CN70-"3"(Brown) ↔ CN72 "3"(Gray)
CN70-"1"(White) ↔ CN72 "3"(Gray)
- Recheck if resistance values are different after the test Check bimetal, heater itself,
1) F DEF Heater 2) R DEF Heater disconnection etc.

Replace failure Relay or

replace PCB ASS'Y

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TROUBLESHOOTING

4-2-7. When Power is not applied

Caution

At the power of SMPS PCB, the AC115(230)V Start

power and a high-voltage over DC 170(325)
V are occurred.
Please take care of yourself on repair and
measurement.
No
Is the power plug connected?

Yes
Make sure the plug is connected and
not loose.

No
Check the SMPS PBA Does the SMPS deliver normal
-. 12V : CON02(#1<>#3) output voltages of 12V and 5V?
-. 5V : CON02(#5<>#3
Yes
Replace the PCB ASSY

Does the Panel No

PCB function properly?

Yes
4-2-9. Panel PBA Check

Is there any soldering short or No

poor soldering job detected on
PCB?
Yes 1. Resolder the PCB
2. Replace the PCB MAIN

Normal

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TROUBLESHOOTING

4-2-8. When Compressor does not run (Inverter COMP.)

Start

10 minutes have No
passed since COMP
was off
Yes
Check in 10 minutes

When Forced Operation No

Refer to the TEST
Function in this manual mode is activated, COMP
operates
Forced Operation signal sound Yes
Yes No
should be checked F-Sensor is Good

0~800Hz 50% No COMP operation signal

Duty (CN103 #1 <>#3) is about Yes Replace F-Sensor
Signal Output DC2~3V

1) Check the wire harness Yes Temperature sensing No

part of MAIN PBA is
2) Replace the MAIN PBA Good
No Is DC 15V applied to
ZD501? Yes Repair the sensing
part or Replace
MAIN PBA
Replace MAIN PBA or
No Yes Repair the connection
Is AC 115V applied to
CN101?
Is DC 5V applied to No
Check the Noise Yes C108(C110)?
Filter & Power Cord Make sure the connector is
Yes plugged properly.
Make sure the connector is
plugged properly. COMP Connector (CN102) No
is Good?
Yes 1) Check the COMP Wire
2) Check the Compressor
No
COMP ASS'Y is Good

Yes
Replace COMP ASS'Y

Normal

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TROUBLESHOOTING

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

① If 'ding-dong'sound continuously

Start

Is door closed Door is ajar

completely?
Remove causes after comprehending
the conditions of interferance by door
gasket, food etc,
Is water penetrated
into the door switch?
Replace Door S/W

Seperate the door switch andcheck if the

measured value of unit is changed from 0Ω Is the door
to Ω∞ according to switch ON/OFF. switch unit normal?
* FF Door Switch is magnetic switch.
(It can be operated when door magnet is
combined with it.) Replace Door S/W
Is the connector CN76
inserted correctly?
Connector is not inserted,
Repair disconnect part
Door & MICOM State
Is the input
FZ MICOM(#28) voltage of main #29,#28
Door FZ MICOM(#29) changed at door-open and
Right and Left close status?
Close 0V(Low) 0V(Low) Repair wire connection and
Door S/W
Open 5V(High) 5V(High)
MAIN PCB & Door S/W is normal.
Recheck and replace Panel PCB

② If 'beep-beep' sounds continuously

Start

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

Does buzzer sounds

when power On again?

Normal

Recheck and Replace Panel PCB

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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?

MAIN PCB normal, BUZZER normal

Does it make a sound

of door open alarm when you are opening the
door of freezer or Fridge more than 3
minutes?
Check the panel PCB with reference
of <how to check Panel Display>
Is there any
damage or breakage of the buzzer in
the panel PCB?

Replace Panel PCB

Did lead of
a component fall on the vibration
plate of buzzer?

Replace Panel PCB

Recheck the button pressing

force and mechanical problem

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TROUBLESHOOTING

4-2-10. When the Panel PCB does not operate normally

① When the entire or a certain section of the Panel PCB does not light up

- There is a MICOM embedded in the Panel PCB. So, take care when doing repairs. And, except the Solder
Touch, replace the PCB.

Start

Refer to the Circuit Diagram of Is the connetor Insert Connector again Repair the contact
No
this manual or the Wiring Diagram insertion of freezer upper-hinge trouble
attached at the back of the unit. nomal?
Yes

MAIN PCB
Connector (CN50) is inserted No Insert MAIN PCB Connector again
normally?

Yes

The Panel Insert Connector again Repair the contact

No
PCB Connecter is connected trouble
properly?

Yes

When
Yes Replace Panel PCB
replacing Panel-PCB,
it lights up?

NO

① Check the Dispenser and the Top Cover Hinge Connectors.

 Check the Wire Cut and the Wire Short.
② Check the wire connection between the Fridge Top
 Cabinet and the Main PCB Connector.
 Check the Wire Cut and the Wire Short.
② When the Panel PCB buttons do not work
※ When it keeps troubling after check with the above procedures
[Check after turning off the unit and turning it on again]

Buttons get stuck Yes Re-assemble PCB ASS'Y or clear the restriction
being pressed down?

NO

Buttons get stuck Yes Re-assemble PCB ASS'Y or clear the restriction
being pressed down?

NO

Buttons get stuck Yes Replace Panel PCB

being pressed down?

NO

① Check the Dispenser and the Top Cover Hinge Connectors.

 Check the Wire Cut and the Wire Short.
② Check the wire connection at the Fridge Top Cabinet.
 Check the Wire Cut and the Wire Short.
③ Check Short/Open at the Panel Communication & the Power
Supply Circuit of the Main PCB

Since all Touch is used for the Panel PCB Switch, be sure to turn off the unit and turn it on again after
doing a repair. [It is to adjust the sensitivity of the Touch Panel.]

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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 R room
Door switch
operate normally?
Check and repair the switch
* Refer to <how to repair door switch>

Is the
connector of pantry room
inserted correctly

Reinsert Connector, Repair bad contact

Is MAIN PCB
Connector (CN51) inserted
correctly?
Reinsert connector in MAIN PCB

Is signal of MAIN
If Panel Key is not PCB CN51 normal?
selected Check voltage/Replace MAIN PCB

Is the lighting
operated when replace Pantry
Panel-PCB?
Panel PCB itself has trouble.

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

② If Panel PCB Key is not selected

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

PCB Typical Ground J23 JUMMPER

The Voltage of KEY is
Working every 2msec/4min Is a key pressed
continuously?

Reassemble PCB ASS'Y / Enforce

the cancelation of pressed keys
Is the PCB system
still operated by separating
of the mechanism?
☞ Checking method of voltage Based on PCB typical
Reassemble PCB ASS'Y /
Ground J23 JUMMPER Enforce the cancelation of pressed
1) Key voltage ; CN51-"11"(Sky Blue) keys
a) Working: 2V±0.5V b) Normal: 0V Is the lighting operated
after replacing the Pantry
Panel-PCB?
Convertible compartment Panel
PCB itself has trouble.
Is a normal voltage
outputted from MAIN PCB IC51
during the key operating?
① Replace MAIN PCB
② Check the short of MAIN
Panel wire
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.

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TROUBLESHOOTING

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

When controlling the regrigerator light with Regulator(12V) : LED LAMP

→ Applying to the F/R Room compartment (Option)

* If the Vegetable Lamp does not work properly, check the R compartment LED Lamp because it is connected with
the R compartment LED Lamp in parallel. Refer to the circuit diagram to repair.

Door & MICOM State Start

MICOM(#28)
Door
Right and Left
Does the No
Close 0V(Low) DOOR S/W sense properly?
(Open/Close)
Open 5V(High)
Yes
Check/Replace REED S/W,
Magnet ASS`Y
MICOM State

Door R F Is the output No

(Right and voltage of IC01 MICOM #28
Left) #28 #29 normal?

Close 0V (Low) 0V (High) Yes Replace/Repair the PCB

Open 5V (High) 5V (Low)

Is the output No
IC76(R)/IC77(F) State voltage of IC76
normal?
IC IC76(R) / IC77(F)
Yes Replace/Rep air the PCB.
0V(Low) 0V(Low) Repair IC76

5V(High) 11~12V(High) Is the MAIN No

PCB connector(CN78) inserted
properly?

Yes Check the wire

Re-insert the connector

Does the MAIN No

PCB connector(CN78) output properly?
(11~12V)

Yes Check the connector terminal

Replace PCB

Is the LED LAMP No

connected properly?

Yes Check the

connector terminal

No
Is the LED LAMP no­mal?

Yes
Replace LED LAMP

Normal

1) Measuring output voltage

Checking method of Door switch voltage. PCB Typical Ground J23
- Measuring the voltage of PCB typical Ground J23 JUMMPER and IC76 JUMMPER
voltage( CN78-"3"(Red)/R LED), IC77 voltage (CN78-"1"(Brown)/F LED) - Measuring voltage of CN76-"12")(Purple) ↔ PCB
typical Ground J23 JUMMPER

Close
R LED Lamp ON R LED Lamp OF

Open

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TROUBLESHOOTING

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

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) Ice Water(R) Valve

PCB Typical Ground J23 JUMMPER
Start

Is the confirming Normal(Check Ice

sound of the valve operation heard when water valve hose)
Ice maker test switch pushed?

☞ Checking method of voltage Based on PCB

typical Ground J23 JUMMPER
1) Check the voltage of IC73-"4"(same voltage as
IC01 “104”)
- ICE Water valve waiting (about 0V)
Does Main PCB IC01 Check soldering
MICOM #7 voltage change short/Replace PCB
5V/0V?

Does Main PCB IC01 Check soldering

Based on PCB typical Ground J23 JUMMPER MICOM #104 voltage have short/Replace PCB
high(5V) output?
2) IC73-"13" voltage
- ICE Water valve Waiting (about 12V±0.8V)
- ICE Water valve operating (about 0.7V±0.5V)

Does Main PCB Check soldering

IC73-"13" have about 0.7V short/Replace PCB
output?

3) Check the voltage of Water Valve operating Is the contact Check soldering
(AC voltage) point of main PCB RELAY RY78 short/Replace PCB
=> For checking the Relay RY78 operating. normal?
CN70-"5"(Red) ↔ CN73_1-"1"(Purple)
- ICE Water valve waiting (about AC 0V)

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

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TROUBLESHOOTING

2) Ice Water(F) Valve

Typical PCB Ground J23 JUMMPER

Start

Is the confirming sound of Normal(Check Ice

the valve operation heard when water valve hose)
Ice maker(FZ) test switch pushed?

☞ Checking method of voltage Based on PCB

typical Ground J23 JUMMPER
1) Check the voltage of IC75 -"6"(same voltage
as IC01 #116)
- ICE Water valve operating (about 5V±0.5V)
Does Main PCB MICOM Check soldering
#116 have high (5V)output? short/Replace PCB

Based on PCB typical Ground J23 JUMMPER

2) IC75 -"11" voltage
- ICE Water valve Waiting (about 13V±0.8V) Does Main PCB IC75 Check soldering
- ICE Water valve operating (about 0.7V±0.5V) #11 have about 0.7V short/Replace PCB
output?

Is the contact point of main Check soldering

3) C heck the voltage of Fridge Ice Water(F) PCB RELAY RY76 normal? short/Replace PCB
Valve operating(AC voltage)
=> For checking the Relay RY76
CN70-"5"(Red) ↔ CN72-"1"(Brown)
- ICE Water valve waiting (about AC 0V)

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
- ICE Water valve operating (about AC 115V± 20%)
or bad contact of connector
③ Check the connection hose

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 TROUBLESHOOTING

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

Start Fridge door shall be

closed during operation.

No
Are Ices ejected?

Yes
No
Are Ices in the Ice bucket?

Is “Ice Off” mode No

① Check the Ice making switch selected on the display
② Check the DOOR Switch panel?
③ Check the Ice moving motor
④ Check the wiring connections of Ice moving motor Yes
⑤ Check if the COVER ICE ROUTE opens
⑥ Check the Q706 movement related with AUGER_ ① Check the water pipe
MOTOR safety Cancel the “Ice Off” : bending / Shut off
Crushed Ice ② heck route of ice check solenoid
Which mode is ③ Check he Ice Maker wiring
selected?

Cubed Ice

Cubed Ice ejected Yes

Is Cubed Ice ejected? Is Crushed Ice ejected?

No Normal Operation status No Normal Operation status

Is Cubed Ice mode No Is Crushed Ice mode No

selected on the selected on the
panel PCB? panel PCB?
Yes Cubed Ice selected Yes Crushed Ice selected

Is the CUBE MOTOR No Is the CUBE MOTOR No

positioned at cubed positioned at cubed
ice mode? ice mode?
Yes Check the wire connections/ Yes Check the wire connections/
Cube Solenoid Motor Cube
Is MICOM IC01 #88 No Is MICOM IC01 #88 No
change into 0V when change into 0V when
press Ice switch? press Ice switch?
Yes - Check the Ice switch has trouble itself Yes - Check the Ice switch has trouble itself
- Check the wire connections - Check the wire connections
- Replace the MAIN PCB - Replace the MAIN PCB
No No
Is the Dispenser Is the Dispenser
Cover opened? Cover opened?
- ICE S/W self diagnosis
Yes - Check the connecting wires. Yes check the WIRE & Motor
- MAIN PCB failure : Replace check Cover ice route S/W 1,2
Replace the MAIN PCB
Is IC73 1,2 changed No Is IC73 #1 changed No
into 5V when pressing into 5V when pressing
Ice Switch? Ice Switch?
Yes Replace the MAIN PCB Yes Replace the MAIN PCB
(Errors on IC01) (Errors on IC01)
Is the contact No Is the contact No
point of RY7A & RY7B RELAY point of RY7A RELAY
changed into 0Ω changed into 0Ω

After disconnecting the Yes - RY7A, RY7B RELAY Error After disconnecting the Yes - RY7A RELAY Error
CN72, CN73 - Replace the MAIN PCB CN72, CN73 - Replace the MAIN PCB
measure The both ends measure The both ends
of Contact points RY7A. of Contact points RY7A.

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.

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TROUBLESHOOTING

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

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.

☞ Checking Mehod of Cover Ice Route Motor Start

Resistance
(Make sure to work after Power Off)
the voltage of Resistance is variable
according to the input voltage. Does GEARED MOTOR No
CN70 -"5" (Red) ↔ CN73_1 -"3" (Blue) work properly?
** 0Ω: Short trouble / Ω∞: Open trouble
Yes Replace the MOTOR

Is Cubed or Crushed No
Ice mode selected on the
LED PANEL?

Yes Cubed or Crushed Ice is selected

on the LED PANEL PCB

Is the DISPENSER No
switch selected?

Yes Select the DISPENSER switch

Does the wiring at the No

both sides of motor connected
properly?

Yes Check the WIRE

When the MOTOR

rotates. Is the AC input voltage Yes
applied to the both ends
of the motor?

No Check the MOTOR/Check any

interference on MOTOR rotation

① Check CN73_1-"3" Connector / Re-connect

② Check the short/open for the SSR75 of Cover Ice Motor on Main PCB.
③ Check the voltage of Resistance of parallel Connector CN73 -"3",
CN70 -"5"
(Definitely plug out prior to repair)

Is the sensing No
SWITCH connection
normal?

Yes Check/Repair the Housing

connector

Is the switch No
pressed area normal when
motor rotates?

Yes Check/Repair the Motor Rotation

Operating Condition of Dispenser pressing area
Open/Close
CN50 - Switch 1,2 Operating
Close ing Open Are the voltage Yes
J23 JUMMPER and CN50-”9”,
Ice Route Switch 1 0V 5V 0V “10” normal?
CN50 - “9” (Purple)
Ice Route Switch 2 0V 5V 0V No Normal
CN50 - “10” (White)

① M ain 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.

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TROUBLESHOOTING

4-2-16. IR Sensor Trouble-Shooting

1. When the IR sensor is defective, ice is not produced even if there is no Ice Maker Error, Ice
Maker Sensor Error or the Ice Maker Function Error.
(When turning on the Self Diagnosis Function, it does not produce ice even if there is no 14E(C), 15E(C)
or 39E(C) being displayed.)
2. Proceed with the Fridge Door being open and the Ice Bucket being removed.

Start

Indicator Location for Ice

Remove the Ice Bucket
Full in Fridge
and turn on the Load Blinking : Ice Full
Status Display Function.
Keep On : Not Ice Full

No
Ice Full in Fridge Room

Yes

Take a photo of the

Block the Receiver with
Emitter with the Cell
a hand.
Phone.

No No
The Emitter is on. Fridge : Changes to Ice Full

Yes Yes

Receiver Normal
Receiver Defect Emitter Defect Receiver Defect
Emitter Normal

Emitter Normal Emitter Defect

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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.

Protecting
LED Blinking Frequency Remarks
Functions
Normal
N/A
Operation
Starting 1. Short between COMP U,V, and W phase(CN102)
Failure 2. Short among IPM Pins(No. #1 ~ 26)
3. Drop the IPM operating Voltage under DC 13.5V
IPM Fault
4. Other cases, check the COMP, cycle, etc.
Abnormal 1. Open the COMP wire(CN102)
Current 2. Bad condition of R1(ex. Bad soldering.)
Detection 3. Other cases, check the COMP, cycle, etc.
1. Operating the locked rotor COMP within 5
second.
Motor 2. Operating the COMP under 1000 RPM more than
Locked / 5 second.
Over RPM 3. Occur the huge change of input voltage in a
moment.
4. Other cases, check the COMP, cycle, etc.
Under 1. Drop the input voltage under AC 53V
Voltage 2. Short resistor R525 (DC link resistor)
1. Increase the input voltage over AC 155V
Over
2. Short resistor among R522, R523 and R524
Voltage
(DC link resistor)

LED blinking frequency depending on protecting functions

If the same blinking, After 5 minutes, Follow the Remarks

95