WASHING MACHINE

DRUM TYPE
Basic Model : WF448AAP
(PURPLE-PROJECT)
Model Name : WF431ABP
(YUKON BETTER-PROJECT)
Model Code : WF431ABP/XEU

SERVICE Manual

WASHING MACHINE (DRUM) CONTENTS

1. Safety Instructions

2. Features and Specifications

3. Disassembly and Reassembly

4. Troubleshooting

5. PCB Diagram

6. Wiring Diagram

WF431ABP

Refer to the service manual in the GSPN (see the rear cover) for the more information.
Contents

1. Safety instructions. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1
1-1. Safety instructions for service engineers . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1

2. Features and Specifications. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5

2-1. Features. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5
2-2. Specifications. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7
2-3. Comparing specifications with existing models . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8
2-4. Options specifications. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9

3. Disassembly and Reassembly. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 11

3-1. Tools for disassembly and reassembly . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 11
3-2. Standard disassembly drawings. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 12

4. Troubleshooting. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 23
4-1. Error modes. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 23
4-2. Corrective actions for each error code . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 28

5. PCB diagram . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .35

5-1. Main PCB . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .35
5-2. Connector and Relay Port Part Detailed Manual (Main PCB) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .36
5-3. Sub PCB . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .37
5-4. Connector Port Part Detailed Manual (Sub PCB) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .38

6. Wiring diagram . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .39

6-1. Wiring diagram . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .39
1. SAFETY INSTRUCTIONS

1-1. SAFETY INSTRUCTIONS FOR SERVICE ENGINEERS

► Be sure to observe the following instructions to operate the product correctly and safely to prevent possible accidents
and hazards while servicing.
► Two types of safety symbols, Warning and Caution, are used in the safety instructions.

Hazards or unsafe practices that may result in severe personal injury or death.
WARNING

Hazards or unsafe practices that may result in minor personal injury or property damage.
CAUTION

WARNING BEFORE SERVICING

• (When servicing electrical parts or harnesses) Make sure to disconnect the power plug before servicing.
 Failing to do so may result in a risk of electric shock.

• Do not allow consumers to connect several appliances to a single power outlet at the
same time.
 There is a risk of fire due to overheating.

• When removing the power cord, make sure to hold the power plug when pulling the plug
from the outlet.
 Failing to do so may damage the plug and result in fire or electric shock.

• When the washing machine is not being used, make sure to disconnect the power plug
from the power outlet.
 Failing to do so may result in electric shock or fire due to lightning.

• Do not place or use gasoline, thinners, alcohol, or other flammable or explosive substances near the washing
machine.
 There is a risk of explosion and fire caused from electric sparks.

Safety Instructions _ 1
 WARNING WHILE SERVICING

• Check if the power plug and outlet are damaged, flattened, cut or otherwise degraded.
 If faulty, replace it immediately.
Failing to do so may result in electric shock or fire.

• Completely remove any dust or foreign material from the housing, wiring and connection parts.
 This will prevent a risk of fire due to tracking and electrical hazard..

• When connecting wires, make sure to connect them using the relevant connectors and check that they are
completely properly.
 If tape is used instead of the connectors, it may cause fire due to tracking.

• Make sure to discharge the PBA power terminals before starting the service.
 Failing to do so may result in a high voltage electric shock.

• When replacing the heater, make sure to fasten the nut after ensuring that it is inserted into the bracket-heater.
 If not inserted into the bracket-heater, it touches the drum and causes noise and electric leakage.

WARNING AFTER SERVICING

• Check the wiring.

 Ensure that no wire touches a rotating part or a sharpened part of the electrical harness.

• Check for any water leakage.

 Perform a test run for the washing machine using the standard course and check whether there is any water
leakage through the floor section or the pipes.

• Do not allow consumers to repair or service any part of the washing machine
themselves.
 This may result in personal injury and shorten the product lifetime.

• If it seems that grounding is needed due to water or moisture, make sure to run
grounding wires. Grounding
(Check the grounding of the power outlet, and additionally ground it to a metallic water terminal
pipe.)
 Failing to do so may result in electric shock due to electric leakage.
[Running a grounding wire]
- Twist a grounding wire (copper wire) two or three times around the tap.
- If you connect the grounding wire to a copperplate, bury it 75 cm under the earth in a
place with a lot of moisture.
Do not connect the grounding wire to a gas pipe, plastic water pipe or telephone
wire. There is a risk of electric shock or explosion.

75 cm

Copperplate

2 _ Safety Instructions
 CAUTION BEFORE SERVICING

• Do not sprinkle water onto the washing machine directly when cleaning it.
 This may result in electric shock or fire, and may shorten the product lifetime.

• Do not place any containers with water on the washing machine.

 If the water is spilled, it may result in electric shock or fire. This will also shorten the
product lifetime.

• Do not install the washing machine in a location exposed to snow or rain.

 This may result in electric shock or fire, and shorten the product lifetime.

• Do not press a control button using a sharp tool or object.

 This may result in electric shock or damage to the product.

CAUTION WHILE SERVICING

• When wiring a harness, make sure to seal it completely so no liquid can enter.
 Make sure that they do not break when force is exerted.

• Check if there is any residue that shows that liquid entered the electric parts or harnesses.
 If any liquid has entered into a part, replace it or completely remove any remaining moisture from it.

• If you need to place the washing machine on its back for servicing purposes, place a support(s) on the floor and lay it
down carefully so its side is on the floor.
 Do not lay it down on its front. This may result in the inside tub damaging parts.

Safety Instructions _ 3
 CAUTION AFTER SERVICING

• Check the assembled status of the parts.

 Now is a good time to inspect your work. Review all connections and wiring, including mounting hardware.

• Check the insulation resistance.

 Disconnect the power cord from the power outlet and measure the insulation resistance between the power plug
and the grounding wire of the washing machine. The value must be greater than 10MΩ when measured with a
500V DC Megger

• Check whether the washing machine is level the floor with respect to the original position
of the washing machine prior to service.
By doing this now will reduce for the need of customer dissatisfaction and redo call.
 Vibrations can shorten the lifetime of the product.

4 _ Safety Instructions
2. FEATURES AND SPECIFICATIONS

2-1. FEATURES
Features Description
BUBBLE • BUBBLE Technology’s Engine generates foam by
dissolving detergent with air and water before the
normal cycle starts. Foam allows detergent to distribute
evenly and penetrate fabrics 2.5 times faster than high
efficiency detergent and deeper. Perfectly dissolved
detergent by bubble generator penetrates very quickly
and widely.
- BUBBLE Technology’s Engine generates foam
by dissolving detergent with air and water before
the normal cycle starts. Foam allows detergent to
distribute evenly and penetrate fabrics 2.5 times
faster than high efficiency detergent and deeper.
- Samsung’s effective BUBBLE delivers perfect
cleanliness even with delicate fabrics without any
damages .
Silver Wash Sanitization • The winning combination! Samsung’s silver nano technology combines the
sanitizing effect of silver with state-of-the art science for the ultimate in clean.
Two plates of 99.9% pure silver are converted into silver ions through electrolysis.
They penetrate deep into the wash water to kill bacteria and fungi. Even in cold,
bleach-less water, the silver particles kill 99.9% of odor causing bacteria for a
“super clean” wash. So washing in cold water is energy efficient and better for
your clothes.
• Samsung’s unique technology generates silver ions that remove bacteria and
fungi, and creates an invisible shield that protects your clothes from unwanted
odors until your next wash. Using an ancient and proven purification technique so
simple, yet so advanced, it removes microbes even in cold water.
• Effect of Silver Wash System
- Keeps Stored Clothes Fresh
The Ag+ Silver (Nano) Technology anti-bacterial
effect keeps fabric free from odor-causing micro-
organisms for up to one month, without the use of
strong chemical cleaners. There’s no need to worry
about musty-smelling clothes even if they remain
unused for a long period.
- Makes Shapeless Garments a Thing of the Past
High temperatures and harsh bleaches can damage
and discolor your clothes. The Ag+ Silver (Nano)
Technology helps your clothes last longer, without
stretching, shrinking, pilling or fading.

VRT Steam™ • Superior washing performance

• Loosen up grime/dirt easily with the tough of a button.
• Saving time & energy providing extraordinary cleaning
power.

Features and Specifications _ 5

 Features Description
The Large Capacity • Maximum Capacity, Time & energy Saving
• King Size comforter with other beddings

Quietest VRT™ • Lowest Vibration & Noise

• Samsung’s VRT™ provides smooth operation at spin
speeds up to 1300 rpm.
• 2nd floor as well as main floor installation available

High efficiency energy & • Washing with Samsung’s Silver Wash, even in cold water, sanitizes the laundry
Water saving thereby saving 92% of the energy normally used with hot water sanitization.
Direct drive inverter motor • The power to handle anything! Our direct-drive inverter motor delivers power
right to the washer tub from a variable speed, reversible motor. A beltless direct-
drive motor generates a higher spin speed of 1,300rpms for more effective, quiet
operation. The washer also has fewer moving parts, meaning fewer repairs.
Woolmark certified • The machine wash wool cycle on the Samsung Silver Wash machines has been
tested and has passed the required Woolmark Company specification for machine
washable wool products.
Fabrics should be washed according to the instructions on the garment label as
specified by Woolmark and Samsung.
Diamond Drum • The washing performance has improved and potential damage to the clothing has
been minimized. (The size of the holes on the diamond drum has been reduced
for minimizing damage to the clothing/garment.)
- The embossed wall of the drum serves as a washboard, dramatically
increasing the washing performance compared with existing drum washing
machines, which uses the power of the difference in elevation only.
- The size of holes has been reduced drastically, maintaining the optimal wash
performance (Washing Cost 1.0) while saving on water and electricity required
for washing.
- The structure of the holes on the diamond drum was redesigned to minimize
potential damage to the clothing.

Conventional

Fabric

Diamond Drum

Fabric

6 _ Features and Specifications

2-2. SPECIFICATIONS
Model 431ABP
Wash type Front loading type
A: High-Overall 991 mm

Dimension B: Width 686 mm

(Inches / mm) C: Depth with door open 90º 1314 mm
D: Depth 811 mm
Water pressure 20 ~ 116 psi ( 137 ~ 800 kpa)
Weight 107 kg (236 lb)
Capacity 17kg
Washing 120 V 250 W

Power Washing and heating 120 V 1100 W

consumption Spin 120 V 600 W
Drain 120 V 80 W
Spin revolution rpm 1300 RPM (1250 RPM)

A: 991

D: 811
B: 686

Features and Specifications _ 7

2-3. COMPARING SPECIFICATIONS WITH EXISTING MODELS
Grade YUKON BETTER PURPLE
WF431ABP
Model Name WF448AA*
WF431ABW

Image

Capacity (cu.ft / IEC) 4.5 cu.ft 4.5 cu.ft

Motor type DD Motor DD Motor
Max RPM 1300 1300
vrt Yes Yes
heater(900w) Yes Yes
Main Spec
Diamond Drum Yes Yes
Washing Cycle# 13 12
Delay wash 24hrs 24hrs
Tilted Drum 10° 10°
Sound Pressure Ave 56.3 dBA Ave 57.5 dBA
MEF 2.98 2.7
Target
WCF 3.2 3.4
performanece
kWh/year 105 kWh/year 162 kWh/year
control Display G.LED LCD
W: White
E: Cooper
P: Stainless platium
Design Frame Color P: Stainless platium
W: White
R: Tango red
L: Onyx blue
Dimension 27 X 32.4 X 39" 27 X 31.9 X 39"

8 _ Features and Specifications

2-4. OPTIONS SPECIFICATIONS

Item Code QTY Remarks

BOLT-SPANER
DC60-40146A 1 Default
(Wrench)

HOSE-WATER(H) DC62-00075A 1 Default

HOSE-WATER(C) DC62-00075B 1 Default

MANUAL-BOOK DC68-02535D 1 Default

CAP-FIXER DC67-00307A 6 Default

SEAL-WATER DC62-40178A 4 Default

HOSE-HANGER DC62-10278A 1 Default

Note
• You can purchase additional water supply and drain hoses from a service center.
• For built-in models, the spanner(wrench), water supply and drain hoses are not supplied. Both the water supply and
drain hoses are supplied during the installation.

Features and Specifications _ 9

3. DISASSEMBLY AND REASSEMBLY

3-1. TOOLS FOR DISASSEMBLY AND REASSEMBLY

Tool Type Remarks

Socket 10mm Heater (1)

Wrench with 13mm Motor (1), Balance (5), 2 holes of each left and
6” Extension 19mm right of the shock absorber 1 Pulley hole

10mm Replaceable for the box driver.

Open End
13mm Since the bolt runs idle when the box driver is
wrench
19mm used, use the box driver 17mm.

Tool to protect the idle and abrasion of the bolt

Vice pliers
for the box driver.

Others
(Driver, Nipper, Long General tools for the after service.
nose)

JIG for the Tub 1 (Disassemble and Assemble)

Removal and Reassembly _ 11

3-2. STANDARD DISASSEMBLY DRAWINGS
► This is a standard disassembly diagram and may differ from the actual product.
Use this material as a reference when disassembling and reassembling the product.

Part Figure Description

1. Remove the two screws holding the Top Cover at

the back of the unit.

2. Remove the top-cover by lifting it up after pulling it

back about 15mm.
ASSY COVER TOP

Noise filter Water valve

3. With the top cover removed you will now have

access to service the Water pressure sensor, EMI
Noise Filter, Hot and Cold Water Valves, Steam
ASSY, Hose Draw ASSY, and Main PCB ASSY.

Sensor pressure

12 _ Removal and Reassembly

 Part Figure Description

1. Remove the 2 screws at the top of the ASSY-

PANEL CONTROL.

2. Hold the ASSY-PANEL CONTROL while pulling it

upwards and release the hook to remove it.

MAIN-PCB AND
SUB-PCB PANEL

3. Carefully disconnect the two wiring connectors by

hand.

4. Remove the 10 screws holding the PCB and

release the hooks on both sides to remove the
PCB for repair / replacement.

Removal and Reassembly _ 13

 Part Figure Description

• Seperate the Wire-Diaphragm with the Long-nose

from the Front-Frame.

1. Remove the Diaphragm.

2. Remove the 6 screws holding the FRAME-FRONT.

3. Remove the 2 screws holding the bottom of the

FRAME-FRONT.

FRAME FRONT

4. Untie the hose.

5. Remove the 3 screws.

6. Push the hook.

7. Disconnect the terminal for the DOOR-LOCK

switch.

14 _ Removal and Reassembly

 Part Figure Description

• Remove the 2 screws holding the Back-Cover at

COVER-BACK
the back of the washing machine

1. Remove the 2 screws holding the Guide Wire at

the upper of the washing machine.

STEAMER
(Only WF448***)

2. Disconnect the terminal for the steamer

1. Remove the one bolt for the DD Motor.

DD MOTOR

2. Remove the 6 screws.

Removal and Reassembly _ 15

 Part Figure Description

1. Remove the Top Assy-Plate.

2. Disconnect the water supply valve wire connector.

WATER SUPPLY
VALVE

3. Remove the 4 screws holding the water supply

valve.

The Bracket type water level sensor

Noise filter Water valve

1. Separate the Top Assy-Plate.

WATER LEVEL
SENSOR
(The Bracket type)
Sensor pressure

2. Remove the screw holding the water level sensor.

3. Disconnect the wire between the PRESSURE

HOSE and the water level sensor for repair /
replacement.

16 _ Removal and Reassembly

 Part Figure Description

The Hook type water level sensor

Noise filter Water valve

► Disassembly
1. Separate the Top Assy-Plate.

Sensor pressure

1. To remove the water lever sensor, push it slowly

in the direction of the arrow shown in the figure on
the left.
Since this disassembly method uses the
elasticity of the water level sensor hook,
imposing too strong a force may damage it.
WATER LEVEL
SENSOR
A
(The Hook type) 2. While a force is imposed on the water lever sensor
as directed in step 1, pull the hook A in the
direction of the arrow until it is removed from the
bracket spring.

3. Impose a force slowly in the direction of the arrow

B designated in the figure on the left until the hook B
is removed. Then remove the water level sensor.

► Assembly
1. Connect the pressure hose to the body of the
water level sensor and lock it using the clamp.
When connecting the water level sensor to the
set, make sure to connect it after draining water
by operating the spin cycle.

2. To fix the body of the water level sensor, insert the

hook into the square hole of the bracket spring until
a “click” sound is heard.

Removal and Reassembly _ 17

 Part Figure Description

1. Remove the 2 screws holding the Door Hinge and

separate the door.

DOOR HINGE

2. Remove the 15 screws holding the Holder Glass,

separate the Holder Glass and replace the hinge.

1. Insert the (-) screwdriver into the upper part of the

Filter Cover and push it downwards to release the
latch.

2. Drain the remaining water through the drainage

hose.
DRAIN PUMP
Be sure to use a small bowl to collect the water
collected from the drain hose.

3. Separate the Drain Filter by turning it

counterclockwise.
Since the remaining water may flow out, place
a bowl underneath it when separating the filter..

18 _ Removal and Reassembly

 Part Figure Description

4. Remove the 2 screws holding the Drain Pump.

5. Drain the remaining water through the drainage

hose.

DRAIN PUMP
(Continued) 6. Disconnect the wire connector.

7. Push it back and lift it up.

 Check Points for Troubleshooting

1. Separate the Drain Filter and check if any alien substances are inside the pump (e.g.
coins, buttons .., etc.) → Remove these if found.
2. Check if the wire connector for the Drain Pump ASSY has come loose. Reconnect if
necessary.
3. When water leaks, check the assembly status of the Clamp Hose, and Cap Drain → Take
the relevant countermeasure if necessary.
Turn the filter cap counterclockwise, clean and remove any material that has collected.

Removal and Reassembly _ 19

 Part Figure Description

1. Open the Door.

Seperate the Wire-Diaphragm with Long-nose plier
DOOR-LOCK S/W and remove it from the Front Frame
Since the Diaphragm can be damaged when
removing it, remove it slowly in one direction.

2. Remove the 3 screws.

3. Remove the screw holding the Door-Lock S/W.

Remove the Door-Lock S/W.
Remove the connection wire.
(Remove the connector after releasing it by
pressing the latch.)

20 _ Removal and Reassembly

 Part Figure Description

1.Seperate the Back Cover

2.Seperate the 3 bolts

Heater
3. Seperate the Connection Housing(3).
Remove the nut holding the heater and the heater.

4. Remove the heater from the Tub.

Caution
Make sure to insert
the Heater into the
correct position of the
bracket inside the Tub
when reassembling it.
Otherwise, there is a
risk of fire.
Make sure to push it inwards until the packing part
comes into the Tub completely when reassembling
it so that the packing part is completely stuck to the
Tub.
Fasten the holding nut with a force of 5Kgf/ cm2.
If the nut is not fastened properly, there is a risk of
water leaking.

Reassembly is in the reverse order of the removal.

Removal and Reassembly _ 21

4. TROUBLESHOOTING

4-1. ERROR MODES

► This is a washer integrated error mode. For detailed information, refer to the general repair scripts.

For USA
Error Type Causes Remarks
LED LCD
- The part of the hose where the water level sensor is
located is damaged (punctured).
- The hose is clogged with foreign material.
- The hose is folded.
Water Level - Too much lubricant has been applied to the insertion
LE
Sensor part of the air hose.
- Hose engagement error (disengaged)
- Part fault (Faulty internal soldering)
- The water level sensor terminal is disengaged.
- Main PBA fault.
- The PBA connector terminal is not connected.
- The motor spin net is not engaged. This error
- The motor’s internal coil is damaged (short-circuited occurs because
3E
or cut) of restrained
- The hall sensor terminal is not connected. revolutions
- Foreign material (a screw) has entered the motor.
- Motor overloaded due to too much laundry (Non- This error
sensing) occurs when an
Motor Driving - The motor hall sensor terminal is not connected. interference is
E3
Error and Hall - PBA fault generated due
Sensor Error - The motor driving error from the PBA is weak. to too much
: Unstable relay operation, etc. laundry, etc.

- This occurs due to erroneous operating signals from

the motor hall sensor.
- The IPM terminal of the main PBA is not connected.
bE - The DD motor cover is out of place.
- The PCB housing terminal is not connected.
- PBA fault
- DD motor fault
- Foreign material is entering the water supply valve.
- The water supply valve terminal is not connected.
(Wire disconnected)
If this error
- The warm water and rinse connectors are wrongly
occurs in the
connected to each other.
Wool course
- This occurs if the PCB terminal from the drain hose
to the detergent drawer is not connected. Check
Water Supply whether the transparent hose is folded or torn.
nF
Error
- The cold and warm water supply hoses are wrongly The water
engaged into each other. supplied for 1
- The temperature of the water supplied through the dry minute drying
valve during a dry cycle is sensed as higher than 70 the drying cycle
˚C. is 0.3 ~ 0.4 L.
- The water temperature is sensed as higher than 50 ˚C
in the Wool or Lingerie courses.
- The pump motor impeller is damaged internally.
- The wrong voltage (220 V → 110 V) is supplied to the
parts.
- Part fault
- This occurs due to freezing in the winter season
Drain Error nd - The drain hose is clogged. (Injection error, foreign
material)
- Clogged with foreign material
- The water pump terminal is not connected: rubber
band, bills, cotton, hair pins, coins have collected
inside the drain pump ASSY.

Troubleshooting _ 23
 For USA
Error Type Causes Remarks
LED LCD
- Check the consumer’s power conditions.
: Make sure to check the operating voltage. Connect
a tester to the internal power terminals during the
Boil or Dry operations and observe the washing
machine’s operation carefully.
2E : Check the voltages. (An error occurs when under
or over voltage is supplied.)
: Check whether a plug receptacle is used. When
the connecting wire is 1m, a momentary low
Power Error voltage may drop up to 10 V
- Main PBA fault (sometimes)
- This error is not a fault but occurs during a
momentary power failure
: When this error code is displayed, the operation
restarts from the cycle that was stopped due to the
PF -
power failure.
: If the washing machine is not operating and this
error code is displayed, it is displayed to notify that
a power failure has occurred.

- The signals between the sub and main PBAs are not
sensed because of commuication error.
- Check the connector connections between the sub
Communication
- and main PBAs carefully.
Error
→ Check for incorrect or loose connections, etc.
- Remove the sub PBA C/Panel and check for any
faulty soldering.

- The Power button is pressed continually (for more

than 12 seconds).
- A switch is jammed or stuck due to be pressed
unevenly due to deformation of the control panel or
button.
- This error may occur when the screws that hold the
E2
sub PBA in place are tightened too much.
- A button other than the Power button is continually
pressed (for more than 30 seconds).
- Deformation of an internal plastic injection part
Switch Error - A screw for assembling the sub PBA is tightened too
(Main Relay much.
Error)

- The main relay of the PBA is short-circuited. When the PBA

Sr - The main relay terminal is connected incorrectly. motor relay does
(The terminal is bent and contact cannot be made.) not operate

24 _ Troubleshooting
 For USA
Error Type Causes Remarks
LED LCD

dS - A switch contact error because of a deformation of the When the door is

door hook not opened after
(Before the door open
operation) - When the door is pulled by force operation

dL When the door is

- This occurs in the Boil wash because the door is not locked after
(During pushed due to a pressure difference from internal the door close
operation) temperature changes operation

Door Error

LO
(Unlock
Fail)

- The door lock switch terminal is connected incorrectly.

- The door lock switch terminal is broken.
- This occurs intermittently because of an electric wire
leakage
- Main PCB fault

FL
(Lock Fail)

Troubleshooting _ 25
 For USA
Error Type Causes Remarks
LED LCD
- The washing heater is short-circuited or has a wire
disconnected.
- The washing heater in the tub has an error. (Contact If the heater has
error, temperature sensor fault) no error, this
- If the water level sensor operates without water occurs because
because water is frozen or for any other reason and of a PBA relay
the temperature sensor engaged at the bottom to malfunction.
prevent overheating for the washing heater detects a
temperature of 100 to 150 ˚C, the washing machine
turns the input power off.
Hr
Heater Error (Heater - This error occurs when the red temperature sensor
Relay) at the center of the dry heater operates (at a
temperature higher than 145 ˚C)
: Corrective action – Press the button at the center
lightly. The washing machine will operate normally.
Alternatively, replace the temperature sensor if the
temperature sensing is unstable because of functional
degradation.
- This occurs when the steam function does not
operate normally.
- This error does not occur in existing drum products.
Check whether the product is a steam model
- Heater engagement fault (out of place)
- The air hose is out of place and water leakage occurs
during the spin cycle.
- The tub back at the safety bolts fixing part is broken.
- Water leakage occurs at the front with foaming
because of too much detergent
- Water leakage occurs because the connecting hose
to the detergent drawer is connected incorrectly.
Water Leakage
LE - The drain pump filter cover is engaged incorrectly.
Error
- Water leakage occurs at the drain hose.
- The duct condensing holding screws are worn.
- The nozzle-diaphragm is engaged in the opposite
direction or the rubber packaging is omitted.
- Water leakage occurs because the screws that
hold the tub back and front in place are fastened
incorrectly.
- The leakage sensor is faulty.

- Water is supplied continually because the water level

detection does not work.
- Because the drain hose is clogged and there is
an injection error (at a narrow section), the water This error occurs
level detection does not work and water is supplied because the
Overflow Error OE continually. water level
- Water is supplied continually because of freezing or sensor terminal
because there is foreign material in the water supply is out of place.
valve.
- This error may occur when the water level sensor is
degraded.

- The washing heater in the tub has an error. (Contact

Heater sensor
error, temperature sensor fault)
fault
- The connector is connected incorrectly or is
: When the
disconnected.
connector is
Temperature - If the water level sensor operates without water
tE connected
Sensor Error because the water is frozen or for any other reason
incorrectly or
and the temperature sensor engaged at the bottom to
has a wire
prevent overheating for the washing heater detects a
disconnected or
temperature of 100 to 150 ˚C, the washing machine
contact error
turns the input power off.

26 _ Troubleshooting
 For USA
Error Type Causes Remarks
LED LCD

- As laundry causes this error, check the laundry.

Unbalance
dc - Find the reason for the unbalance and solve it as
Error
directed in the user manual.

- This occurs when too much foaming is detected. It is

also displayed while foaming is removed. When the
removal is finished, the normal cycle proceeds. “Sud”
Foaming or “SUdS” is displayed when too much foaming is
SUdS
Detected detected and “End” is displayed when the removal of
the foaming is finished.
(This is one of the normal operations. It is an error for
preventing non-sensing faults.)

- Error detected in the Mems PBA or data error

detected. Check the wire connections.
Replace if necessary.
Mems PBA
E8 - 1. Check the wire connections.
Error Detected
2. Replace the Mems PBA.
3. Main PBA wire connection error or PBA’s silver
nano part malfunction. Replace if necessary.

Troubleshooting _ 27
 ► These are common troubleshooting procedures for each drum-type washer error mode. For detailed information, refer to the general repair scripts.

Error Mode
Error Type Causes Corrective Actions Description of Photo
LED LCD
• Check the water level sensor terminal
• Water level sensor fault connections and contacts.
Check the water level sensor
• Incorrect connections of • An error occurs if an incorrect water
frequency.
the water level sensor level sensor is used. Make sure to
- Check it after the water level

28 _ Troubleshooting
Water Level terminal check the material code. (Abnormal
LE sensor and the connector are
Sensor • The hose part for the operation)
connected.
water level sensor is • If the water level sensor is faulty,
- Frequency: Approx. 26.4 KHz
folded. replace it.
with no load
• Main PCB fault • If the error persists despite taking the
action above, replace the PBA.
► DD MOTOR
Check the resistance on the
main PCB motor. (Between pins
1 and 3, and 1 and 4 of the four
(4) pins)
- Resistance: Approx. 2 to 4
MΩ
- Check the voltage when the
• Check the motor connector terminal power is on.
connections and contacts.
• Washing motor fault
• 3E is displayed because overloading ► UNIVERSAL MOTOR
• Washing motor hall sensor
occurs due to too much laundry.
fault Check the Resistance of Nos.1
• If the hall sensor terminal is faulty, and 4 of the wire pin on the side
Washing Motor 3E • Incorrect connections of
replace the hall sensor. of the TACHO SENSOR.
Error and Hall E3 the washing motor/hall
• Check whether the stator of the motor
4-2. CORRECTIVE ACTIONS FOR EACH ERROR CODE

Sensor Error bE sensor connector - Resistance: Approximately

cover is damaged. 40 to 45 Ω (Normal)
• Washing motor rotor and
• Check for coil disconnections due to
stator fault
foreign material.
• Main PCB fault
• If the PBA control circuit is faulty, ► THREE PHASE MOTOR
replace the PBA. Measure the Resistance of Nos.
2 and 3 of the wire pin on the
side of the HALL SENSOR.
- The revolution of the drum
needs to be reproduced.
(Turn the drum by hand.)
- Resistance: Approximately 3
to 12V (Voltages may differ
depending on the speed of
the revolutions.)
 Error Mode
Error Type Causes Corrective Actions Description of Photo
LED LCD

• If the water supply valve has a wire

disconnected, replace it. 1. Check the resistance for the
• Check whether the water supply valve water supply valve.
• Water supply value fault is clogged with foreign material and - Resistance: 0.8k to 1.8kΩ
Water Supply • Main PCB fault whether water is supplied continually. between the terminals of the
nF
Error • Freezing in the winter • Check whether no water is supplied water supply valve.
season because of freezing in the winter 2. Check whether there is
season. foreign material in the water
• If the PBA relay operates abnormally, supply valve diaphragm.
replace the PBA.

► DRAIN MOTOR
• Check whether the revolutions of the Resistance: Approximately
drain pump motor are restrained by 6.3 Ω between the Terminals
foreign material. for the Water Supply Valve
• Check the same thing for the natural
drain process.
• Drain pump fault • Check the wire connectors on Main
• Freezing in the winter PCB and Drain Pump ASSY. The
season connector or wire may have poor
Drain Error nd
• Foreign materials in the physical connection.
drain pump • If the drain pump operates abnormally
• Main PCB fault intermittently when the temperature of
the water in the tub is high. ► DRAIN PUMP
• If the motor revolutions are restrained Resistance: 11.9 to 16.1kΩ
due to freezing in the winter season, between the Terminals for the
check the method to remove the Water Supply Valve
freezing and remove as directed.

Troubleshooting _ 29
 Error Mode
Error Type Causes Corrective Actions Description of Photo
LED LCD

• Check the wire connections and

• The signals between the terminal contacts between the sub and
sub and main PBAs are main PBAs.
Communication not sensed. • Check for disconnected wires.
- -

30 _ Troubleshooting
Error • Incorrect wire connections • Check whether the sub PBA is short-
between the sub and main circuited because of moisture.
PBAs. • If the main PBA’s communication
circuit is faulty, replace it.

• Check whether either the Power

switch or a tact switch is continually
pressed. Check the contact between the
• Check whether the service PBA control panel buttons and their
• The Power button is holding screws are fastened too tight. corresponding tact switch.
continually pressed. If they are fastened too tight, loosen - There must be a gap
Switch Error
E2 • A button other than the them a little. between a control panel
(Main Relay button and its corresponding
Sr Power button is continually • If the main PBA switching IC on/off
Error) micro switch.
pressed. error has occurred, replace the main
• Main PCB relay fault PBA. Otherwise, an error
• The “E2” error occurs if the main relay occurs after approx. 30
connections are incorrect. Check the seconds has passed.
connections. If there is no error in the
connections, replace the main PBA.
GAP
 Error Mode
Error Type Causes Corrective Actions Description of Photo
LED LCD

dS

► TYPE 1
1. Check the door switch
Resistance.
2. The resistance of 1 and 3 Pin
Must be approximately 125Ω.

dL • If a dS error occurs, check whether it

occurs during the Boil cycle.
- If it is detected that the door is open,
close the door.
• Door switch fault
• The 120V is directly connected to the
• Drain pump fault
Door Error door. Check and repair the power wire
• Dry duct fan motor fault.
connections and insulation state.
• Main PCB fault
• Check the door switch. Replace if
faulty.
• Check the main PBA door sensing
circuit. Replace if faulty.

LO

► TYPE 2
The resistance of Nos. 3 and 5
of the DOOR LOCK SWITCH
must be approximately 949 Ω.

FL

Troubleshooting _ 31
 Error Mode
Error Type Causes Corrective Actions Description of Photo
LED LCD

• Check for wires are disconnected in

• Heater fault the washing heater. Replace if faulty.
• A fault of the red - An Hr error occurs.
temperature sensor at the • If the dry heater or air refresh heater

32 _ Troubleshooting
Heater Error Hr center of the dry heater overheating sensor is faulty, replace it. -
• Steam function fault - An Hr error occurs.
• Freezing in the winter • Check the steam heater. Replace if it
season is faulty.
- An Hr error occurs.

► DRAIN PUMP TYPE

Check whether there is any
foreign material in the bellows.
• Check for any leakage on the base,
Hose, Valve and Tub connections and Check for any foreign
• Check for any leakage. take any required action. material, such as
• Foreign material in the DV • During natural draining, this error underwear wires or coins.
Water Leakage case occurs because the drain bellows are
LE
Error • Fault of a hose or incorrect clogged with foreign material. Remove
part engagement in the the foreign material.
product • Check the drain motor operation.
► PUMP TYPE
Replace if it does not operate
normally. Check for any leakage on the
base, Hose, Valve and Tub
connections.

• If the water level sensor has a

functional error, replace it.
Check the hose connected to
• Check the hose. This error occurs if it the water level sensor.
• Water level sensor fault
is torn or has a hole.
Overflow Error OE • Freezing in the winter Check whether the
• This error occurs if water is frozen in
season hose is folded, cut, or
the winter season. Use hair dryer to
damaged.
defrost hose. Consider relocating the
unit to warmer location.
 Error Mode
Error Type Causes Corrective Actions Description of Photo
LED LCD
• Check the connections for the washing
heater temperature sensor connector.
• If the washing heater temperature
• Washing temperature sensor has a functional error, replace
sensor fault it.
• Dry temperature sensor - A tE error occurs.
fault • Check the connections for the dry
Temperature • Faulty and incorrect heater temperature sensor connector.
tE -
Sensor Error connections of the dry • If the dry heater temperature sensor
condensing sensor has a functional error, replace it.
• Main PCB fault • Check the connections for the duct
• Freezing in the winter condensing temperature sensor
season connector.
• If the duct condensing temperature
sensor has a functional error, replace
it.

• Check the type of laundry. Check

whether they may cause an
unbalanced situat ion.
• Motor hall sensor fault
- Educate the consumer in this case
Unbalance Error dc • Caused by the laundry -
is to press pause reposition the
contents
load or remove a few items. Press
start to continue and complete the
wash cycle.

Troubleshooting _ 33
5. PCB DIAGRAM

5-1. MAIN PCB

11

12

13

1
10

5
6
3 4 7 8

Location Part No. Function Description Location Part No. Function Description

1 CN2 PBA Power Supply Supplies 120V of AC power Supplies power to the Sub PBA and provides a communications
8 CN8 SUB PBA Connection Port
function.
2 CN1 Reactor Connection Port Blocks noise generated when the motor operates.
9 IPM1 Washing Motor Drive IC Switches and supplies the voltages for the motor.
3 RY1 Main Relay Supplies PBA power when the Power button is pressed.
Water Level And Temperature Detects the laundry, water supply, and water draining operations and
10 CN7
4 RY3 Washing Heater Relay The switch for the Washing Heater power supply drive. Sensor Connector detects whether each heater is working properly.

Steam Heater Relay Door And Silver Nano

5 RY4 The switch for the Steam Heater power supply drive. 11 CN4 Detects the door operations and supplies power for the Silver Nano.
(Only WF448***) Connector

6 CN5 Motor Power Supply Port Supplies the 3-phase drive voltage for the Washing Motor. 12 CN3 Each Load Connection Port The port to supply power for each electric device.

7 CN6 Hole Sensor Connection Port Detects whether the Washing Motor is working normally. 13 IC18 Ag IC Drives the Ag IC.

PCB Diagram _ 35
5-2. CONNECTOR AND RELAY PORT PART DETAILED MANUAL (MAIN PCB)

► CN3
1. Door Lock Close ► CN4
2. Door Lock Open 6. Circulation Pump 1. Door Switch 5. Empty Pin
3. Drain Pump 7. Pre Valve 2. Empty Pin 6. Empty Pin
4. Steam Valve 8. Main Valve 3. Door Switch 7. AG Sensor
5. Bleach Valve 9. Hot Valve 4. Empty Pin 8. AG Sensor

► CN2
1. AC Power Port
2. AC Power OFF Detection
Sensor ► CN7
3. Door Detection Sensor 8 1 1. Empty Pin
3 1
(LOCK, UNLOCK) 2. Empty Pin
3. Empty Pin
4 6 4. Washing Water Temperature Sensor
5. Ground
6. Washing Water Level Sensor
7. Washing Water Level Sensor
► CN1 1 3
7 1
1. Reactor Connection Port
2. Reactor Connection Port
1

► CN8
1. Communications Port (Rx)
2. Communications Port (Tx)
1 1 1 3 3. Rest Signal Output
1 1 6 1 4. Ground
5. 5V
6. 15V

► RY1 ► RY4 ► CN5 ► CN10 ► CN6

1. Main Power Relay Switch 1. Washing Heater Relay Switch 1. Motor Power (U Phase) 1. AC OFF Check 1. 5V
2. Main Power Relay Switch 2. Washing Heater Relay Switch 2. Motor Power (V Phase) 2. Test Mode 2. Hole Sensor Signal
3. Motor Power (W Phase) 3. 5V 3. Hole Sensor Signal
4. Transmission Port 4. Ground
5. Ground
6. Input Port

36_ PCB Diagram

5-3. SUB PCB

3
1 2

Location Part No. Function Description

1 Graphic CN4 Main PBA Connection Port Receives power from the Main PBA and provides a communications function.

2 Graphic CN3 Drum Light Turn on when door is opened.

3 Graphic CN2 and so on Display and Buzzer Connection Port Connects the D Board and the Graphics Board.

4 BZ1 Buzzer Circuit Be generated sound when the menu key is pressed or the encoder is operated, the menu is closed.

PCB Diagram _37

5-4. CONNECTOR PORT PART DETAILED MANUAL (SUB PCB)

► CN10
1. Communications Port (Tx)
2. Communications Port (Rx)
3. Reset Signal ouput ► CN3_GRAPHIC
4. Ground 1. Tub Light Drive Signal
5. 5V 2. Empty Pin
6. 15V 3. 15V

13 1 6 1 3

► CN2
1. JOG signal 8. Led signal
2. JOG signal 9. Led signal
3. Ground 10. Led signal
4. Led signal 11. Led signal
5. Led signal 12. Buzzer signal
6. Led signal 13. Buzzer signal
7. Led signal

38 _ PCB Diagram
6. WIRING DIAGRAM

6-1. WIRING DIAGRAM

REFERENCE INFORMATION
BLK BLACK
BLU BLUE
GRN GREEN
GRY GRAY
NTR NATURAL
ORG ORANGE
PNK PINK
RED RED
SKYBLU SKYBLUE
VIO VIOLET
WHT WHITE
YEL YELLOW

Wiring Diagram _ 39
*631 */2%$/6(59,&(3$571(51(7:25.
$UHD :HE6LWH
Europe, CIS, Mideast & Africa gspn1.samsungcsportal.com
Asia gspn2.samsungcsportal.com
North & Latin America gspn3.samsungcsportal.com
China china.samsungportal.com

‹6DPVXQJ(OHFWURQLFV&R/WG
This Service Manual is a property of Samsung Electronics Co.,Ltd.
$OOULJKWVUHVHUYHG
Any unauthorized use of Manual can be punished under applicable
International and/or domestic law. 3ULQWHGLQ.RUHD
Code No.: DC68-02828A