Samsung DV5471AE User manual

Fast Track Troubleshooting

Publication # nwDV5471 Revision Date 09/23/11

IMPORTANT SAFETY NOTICE – “For Technicians Only” This service data sheet is

intended for use by persons having electrical, electronic, and mechanical experience

and knowledge at a level generally considered acceptable in the appliance repair trade.

Any attempt to repair a major appliance may result in personal injury and property

damage. The manufacturer or seller cannot be responsible, nor assume any liability for

injury or damage of any kind arising from the use of this data sheet.

Models:

DV5471AE DV5471AG

Location consideration In the USA:

 All Dryers Must be vented to the outside.

 Only rigid or flexible metal duct should be

used for venting.

Electrical Dryers 240 VAC, 60 Hz, 30 Amps, 3

-wire or 4-wire installations

Gas Dryers 120 VAC, 60 Hz, 15 Amps, 3-wire

installations

Description Trigger Action Taken

Dryer Thermistor Short

Sensed

The Thermistor resistance is

ve ry l o w.

Check for: Clogged lint screen,

Restricted vent system, Thermistor

resistance.

Dryer Thermistor Open

Sensed

The Thermistor resistance is

very high.

Check for: Clogged lint screen,

Restricted vent system, Thermistor

resistance.

dE Door Open Running the dryer with door

open

Check for: Loose or open wire

terminals in Door Sense circuit.

FE Power source frequency

Error Invalid power source Frequency Check for: Non Utility power supply

dF Door Circuit Failure Invalid state for more than 256

milliseconds

Check for: Loose or open wire

terminals in Door Sense circuit.

hE or HE Heater Error Invalid heating Temp in running

the dryer

Check for: Restricted vent system,

Thermistor resistance.

bE Button Error PCB key closed for 75 sec. Check Display PCB for stuck button

od Over Dry Invaled Dry Time Excessive Dry

Time Inspect seensor bars

EEprom Fail Invalid state of Eeprom

communication Replace Main PCB

Samsung 'Dryer' Diagnostic Code Quick Guide

Display

NOTICE: All Dryers Parts

Change 6/2010: Motor Pulley,

page 5; Blower Housing, page 4

SUPPORT INFORMATION

Training — Plus One

http://my.plus1solutions.net/clientPortals/samsung/

Help — GSPN http://service.samsungportal.com/

Samsung Product Support TV

http://support-us.samsung.com/spstv/howto.jsp

Customer information videos and chat programs

Programs for Fridges, Laundry, Ranges & D/W

Ass’y Duct Heater (Electric)

Ass’y Duct (Gas)

Ass’y Fan

F0005 = DC47-00017A

A0369 = DC47-00015A

F0005 = DC47-00018A

Thermistor W0035 = DC32-00007A

F0005 = DC47-00016A

►CN1

1. AC Power Port

2. AC Power off

Detection Sensor

3. Door Detection

Sensor

(LOCK,UNLOCK)

Relay 1

1 Motor Belt Sw (Brn)

2 120vac L1 (Blk)

Relay 6

1 Heater Cut Off T-Stat (Blu)

2 120vac L1 (Blk)

►CN6

1. SET GND

New Version of

Blower Housing, it

may be necessary to

separate the harness

wrap on replacement

housing. Please

maintain shielding

on the low voltage

wires.

►CN3

1. 5V

2. SO

3. SI

4. RESET

5. CLOCK

6. FLMDO

7. DGND

8. Empty

►CN4

1. DGND

2. 5V

3. TEMP Sensor1

4. Fabric Detection

Sensor

5. Fabric Detection

Sensor

6. 5V

7. TEMP Sensor2

►CN2

1. Communications Port(Rx)

2. Communications Port(Tx)

3. SUB RESET

4. 5V

5. DGND

6. 12V

►CN5

1. STEAM VALVE1

2. Empty Pin

3. LAMP

4. Empty Pin

5. STEAM VALVE2

6. Empty Pin

Sensor Bar Touch TEST

How to Enter:

With the power on, pressing Wrinkle Prevent and Temp Keys for

3 seconds. This action will put the dryer into sensor bar touch

data mode. This mode is default mode of entering service mode

Cycle Count Test Mode How to Enter:

To enter cycle count mode press the Wrinkle Prevent in Service

Mode.

Software Version Test Mode

How to Enter:

To enter Special Test Mode press Temp Button until the control

beep. (same for all Frontier models.) ex) In case of “U105”, U0

means major version “v1“05 means minor version “05

Temperature Test Diagnostic Mode

How to Enter:

Press Adjust Time Up + Down Keys for 7 sec during

Power On State.

Press Adjust Time Up and it will display the temperature

in Celsius.

Compare vent temp to drum temp to see air flow.

This can be with just power on or dryer running.

Gas Valve Testing

Unplug connectors and test valve terminals

(its numbering is from the front terminal.)

Check across terminals #1 and #3 (Booster Coil). 550 Ω

Check across terminals #1 and #2 (Holding Coil). 1350 Ω

Check across terminals #2 and #3 (Both coils in series). 1900 Ω

Check across terminals #4 and #5 (Secondary Coil). 1300 Ω

Dryer continues to run after cycle completed

Wrinkle Prevent option provides approximately 90 minutes (20 continuous and 70 intermittent) of tumbling in

unheated air at the end of the cycle to reduce wrinkling. Press the Wrinkle Prevent button to activate or deac-

tivate this feature. The indicator light above the pad will illuminate when Wrinkle Prevent is selected. Chasing

lights appear in the display when the Wrinkle Prevent option is selected. The load is dry, and can be removed

at any time during the Wrinkle Prevent cycle.

SUBJECT: Dryer belt slides off the pulley when

manually rotated counter-clockwise (ccw)

SYMPTOM: The dryer drum will not turn. On occa-

sions, the customer will rotate the drum counter

clockwise (CCW) to check for any remaining

clothes left in the dryer drum. By rotating the drum

CCW, the idler arm may shift causing the belt to

slide off the pulley.

SOLUTION: To prevent the dryer belt from sliding

off the pulley, the pulley has been redesigned.

The Outside Diameter has been changed from

22mm to 27mm.

New

DC81-00220A

Special Test Mode:

Press power button & Dry level buttons

simultaneously will put you in System Check Mode..

Display will show t2

Press Start/Pause to toggle through the following

operations

Motor (CW) relay on— Heater Relay on—- Heater

Relay Off—-Motor (CW) Relay Off

Do not use dryer to dry clothes which have traces of any flammable substance, such as vegetable oil, cooking

oil, machine oil, flammable chemicals, thinner, etc., or anything containing wax or chemicals, such as mops

and cleaning cloths. Flammable substances may cause fabric to catch fire by itself.

Make sure the idler pulley and the

motor pulley are straight in line

with each other, bend to correct

Service Mode:::

To enter Service Mode, press Wrinkle Prevent and Temp Keys for

3 seconds, until it sends out a beeping sound.

RY6CN6

Testing Electric Heater circuit.

Disconnect Blue wire from RY6, turn power on, start dryer read voltage between RY6 Blue wire and CN6

Green wire.

Reading of 120VAC means a proper operating heater circuit. 0VAC means open in circuit.

To test thermostats use ohm meter on lowest scale, any resistance replace component

See page 4 for Main PCB layout for testing.

RY 6 RY 5

RY 5 CN7

Testing Main PCB power output to Heating

& Motor circuit.

With motor running in the heating mode,

read AC voltage across RY6 and RY5.

Any voltage reading means Main PCB is

defective.

See page 4 for Main PCB layout for testing.

Testing Motor circuit.

With power off read

resistance between

RY5 Brown and CN7

Blue.

Resistance reading of

good motor circuit is

about 1.9Ω. To test

thermostat and switch

use ohm meter on

lowest scale, any

resistance replace

component.

See page 4 for Main

PCB layout for testing.

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