Samsung DV457EVGSGR/AA Manuel

CLOTHES DRYER

Technical Information

CAUTION

All safety information must be followed as provided in Service Manual of DV457*, DV455*.

WARNING

To avoid risk of electrical shock, personal injury or death; disconnect power to dryer

before servicing, unless testing requires power.

Code No. : DC68-02835D-01_EN

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.

• Due to possibility of personal injury or property damage, always contact an authorized

technician for servicing or repair of this unit.

• Refer to Service Manual (DV457*, DV455*) for detailed installation, operating, testing,

troubleshooting, and disassembly instructions.

Model: DV457* Model: DV455*

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ERROR ITEMS AND DIAGNOSTIC CODES

An occurrence of an Error will make a sound of error melody for 5sec and continuously show one

of the Error Displays from the following errors.

Error Display Trigger Action Taken

tE The Thermistor resistance is very low or

high.

Check for:

- Clogged lint screen.

- Restricted vent system.

- Check Thermistor resistance.

tE3

The resistance of the thermistor for the vent

blockage detection operation is very low or

very high.

Check for:

- Check the vent blockage detection

thermistor.

- Check the resistance of the thermistor.

dE Running the dryer with door open

Check for:

- Close the door, and run the dryer.

- Loose or open wire terminals in Door

Sense circuit.

dF Invalid door state for more than 256

milliseconds.

Check for:

- Loose or open wire terminals in Door

Sense circuit.

bE2 Invalid state of key circuit short for 30 secs Check for:

- Display PCB key circuit short or not.

FE Invalid power source Frequency

Check for:

- Not using regular power source

frequency

- Invalid power frequency sense circuit

2E Electronic Control Problem

(Over Voltage Error)

Check for:

- Check PCB and Wire harness.

- Check Power supply.

AE Electronic Control Problem

(Communication Error)

Check for:

- Check PCB and Wire harness.

- Replace PCB.

Et Invalid state of Eeprom communication Check for :

- PCB with Eeprom circuit.

AE4 A Communication error between the WIFI

PBA and the MAIN PBA Call customer service

AE3 A Communication error between the DR

Modem and the MAIN PBA Call customer service

AE5 A Communication error between the LCD

PBA and the MAIN PBA Call customer service

HE Invalid heating Temp in running the dryer Call customer service

ALIGNMENT AND ADJUSTMENTS

WARNING

To avoid risk of electrical shock, personal injury or death; disconnect power to dryer before

servicing, unless testing requires power.

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TEST MODE

Service Mode

* If "AE3" or "AE4" error occured, press the Start button then error will be cleared.

How to enter:

DV455*

- To enter Service Mode , press Wrinkle Prevent + Temp. Keys 3 seconds in normal mode until it sends

out a beeping sound.

- If pressing Wrinkle Prevent + Temp. Keys in Service mode , it will return Normal mode.

- Even though entering Service mode, the operating cycle will not be inuenced.

DV457*

- Method 1 : Select Title Option “1” on Course Selction Mode. Press Extras for 3 Seconds.

- Method 2 : Tap “2” three times Tap “3” two times Tap “2” once On the Progerss Mode.

Touch Sensor Data Display Mode

Denition of Sensor Bar Touch Data Mode:

- This mode is default mode of entering service mode.

How to enter:

DV455*

- Once the unit enters service mode, the mode changes to touch sensor display mode.

- This action will put the dryer into sensor bar touch data mode

- Dryer will display Sensor Bar data.

DV457*

- If the “6” button is pressed in service mode, the mode changes to touch sensor data display mode.

ALIGNMENT AND ADJUSTMENTS

WARNING

To avoid risk of electrical shock, personal injury or death; disconnect power to dryer before

servicing, unless testing requires power.



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ALIGNMENT AND ADJUSTMENTS

WARNING

To avoid risk of electrical shock, personal injury or death; disconnect power to dryer before

servicing, unless testing requires power.

Cycle Count Mode

Denition of Sensor Bar Touch Data Mode:

- This mode is to bring up the total number of cycles that User have carried out.

How to enter:

DV455*

- Press the Mixed loaded bell key in Service Mode.

DV457*

- In service mode, press the “1” button

Software Revision Mode

Denition of Software Version Mode:

- It is to retrieve its software version

How to enter:

DV455*

At Service Mode, press Temp until it sends out a beeping sound

ex) In case of “U1 05”, U1 means major version “U1”, 05 means minor version “05”.

- If press Temp key In Software Version Mode, it will return Service Mode.

DV457*

- If the unit enters service mode, the software version is displayed in the center top of the

display panel.

If you press the “2” button, the software version of the sensor board is displayed.

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ALIGNMENT AND ADJUSTMENTS

WARNING

To avoid risk of electrical shock, personal injury or death; disconnect power to dryer before

servicing, unless testing requires power.

Data Display Mode

How to Enter:

DV455*

- If you press the time button in service mode, the mode changes to data display mode.

- If pressing AdjustUp Key in this mode ,Display Mode ID will be incresed.

- If pressing AdjustDown Key in this mode ,Display Mode ID will be decresed.

Denition of Software Version Mode:

- Display Mode 0 : Temperature data

- Display Mode 1 : Average Touch Sensor data for 1 minute

- Display Mode 2 : Average Temperature data for 1 minute

DV457*

- If you press the “5” button in service mode, the mode changes to data display mode.

- If you press the up arrow button, the display mode ID increases.

- If you press the down arrow button, the display mode ID decreases.

Denition of Software Version Mode:

- Display Mode 0 : Temperature data

- Display Mode 1 : Average Touch Sensor data for 1 minute

- Display Mode 2 : Average Temperature data for 1 minute

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ALIGNMENT AND ADJUSTMENTS

WARNING

To avoid risk of electrical shock, personal injury or death; disconnect power to dryer before

servicing, unless testing requires power.

DR modem connection test

Check if the parts from the Main PBA to the DR modem are properly connected electronically.

DV457* Model Only

- If you press the “3” button in service mode, the DR wire test is performed.

- If the DR wire test is successful, SG is displayed. Otherwise, the AE3 error occurs.

Service Mode

* If "AE3" or "AE4" error occured, press the Start button then error will be cleared.

How to exit :

DV455*

- Press Wrinkle Prevent + Temp. Keys for 3 second again, or Power Key. If no key is operated

during Service Mode for 5 minutes, the machine will return to normal user mode.

DV457*

- Tap Segment “4“ three times Tap Segment “1” two times Tap Segment “4” once On the Service

Mode. If no key is operated during Service Mode for 5 minutes, the machine will return to

normal user mode.

   

Segment 1

Segment 2

Segment 3

Segment 4

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TROUBLE DIAGNOSIS

- As the micom dry machine is congured of the complicate structure, there might be the

service call.

Below information is prepared for exact trouble diagnosis and suitable repair guide.

Caution for the Repair and Replacement

1) As some electronic components are damaged by the charged static electricity from the resin

part of dryer or the human body, prepare the human body earth or remove the potential

dier ence of the human body and dryer by contacting the power supply plug when the work

contacting to PCB is executed.

2) As the P.C.B assembly is designed for no trouble, do not replace the P.C.B assembly by the

wrong diagnosis and follow the procedure of the trouble diagnosis when the micom is not

operated normally.

ALIGNMENT AND ADJUSTMENTS

WARNING

To avoid risk of electrical shock, personal injury or death; disconnect power to dryer before

servicing, unless testing requires power.

Please follow below instruction for the trouble diagnosis and parts replacement.

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No Problem What To Do

1Will Not Start or Run

• All wires are hooked up to their corresponding terminals.

• Dryer is plugged in.

• Blown fuse or circuit breaker.

• Door switch functional...door closed. Check for error code 3 (See

Table for codedenition).

• Start/Pause rotary selector dial functional.

• Control Board operational.

• Belt o or broken and Belt Cut-o Switch operates.

• Drive motor functional.

• Check motor winding resistance: 2.88ohms between pin #3 and 4,

3.5ohms between pin #4 and 5.

2Motor runs/ tumbler

will not turn

• Belt o or broken/damaged.

• Idler tension spring too weak or stretched.

• Idler pulley jammed or stuck.

3Runs a few minutes

and then stops

• Lint buildup around drive motor.

• Low voltage present.

• Blower impeller blocked in blower housing.

• Drive motor - start switch contacts stuck closed.

4Blows fuses or trips

circuit breaker

• Is the belt connected well?

• Is the winding of the motor continuous?

(Rotor winding, stator winding, generator)

• Is the motor protector normal?

• If above points are not found, the PCB assembly is out of order.

Replace it.

Blows fuses or trips

circuit breaker (Gas

Model)

• During ignition the dryer will draw X amps. With the burner ON, the

dryer will draw X amps. If the dryer is drawing amperages above this,

then the house wiring, fuse box or circuit breaker is suspected to be

at fault.

• Igniter harness loose and shorted to base.

• Incorrect wiring or wire shorted to ground.

• Drive motor winding shorting to ground.

6Will not heat (motor

runs)

Open heating element.

• Hi-Limit trips easily or is open.

• Regulating thermostat trips easily or is open.

• Membrane switch open.

• Check Thermistor.

Will Not Dry Gas

Model Poor Gas

Ignition

When the dryer is operated on a heat setting, the igniter should be

energized and burner shall re within 45 seconds at 120 VAC. The failure

of a component in this system will usually be indicated by one of three

symptoms:

TROUBLE SHOOTING

WARNING

To avoid risk of electrical shock, personal injury or death; disconnect power to dryer before

servicing, unless testing requires power.

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No Problem What To Do

8The igniter does not

glow

If the igniter does not heat up, remove power and using an ohmmeter,

check the following:

• Open ame sensor

• Open igniter

• Shorted booster coil

• Open wiring

• Bad motor switch ( Neutral supply)

• No power from control ( L1 supply)

9Igniter glows - No

gas ignition

If the igniter heats up but the main burner ame is not ignited, remove

power and using an ohmmeter, check the following:

• Open secondary coil

• Open holding coil

• Open wire harness

• Stuck ame sensor (Stuck closed)

The gas is ignited

but the ame goes

out

If a normal ignition takes place and after a short while the ame goes out,

check for the following:

• Radiant sensor contacts opening prematurely.

• Weak gas valve coil may open when stressed by higher Temps.

• Weak Hi-Limit

• Poor venting

• Bad drum seals

Improper drying

clothes wrinkled

Rough texture long

dry time

• Lint lter is not clean.

• Restriction in exhaust.

• Outside exhaust hood damper door stuck closed.

• Exhaust too long, too many elbows, ex ductwork installed.

• Poor intake air available for the dryer.

• Incorrect tumbler speed. Tumbler belt slipping.

• Blower impeller bound; check for foreign material in blower area.

• Customer overloading dryer.

• Check clothing labels for fabric content and cycle selected.

• Clothes too wet due to insucient spin out by washer.

12 Noisy and/Or

Vibration

• Thumping Check for loose tumbler bae, rear tumbler roller(s) worn

or misaligned, out-of-round tumbler or high weld seam on tumbler.

• Ticking Check for loose wire harness or object caught in blower

wheel area.

• Scraping Check for front or rear bulkhead felt seal out of position or

worn tumbler front bearings.

• Roaring Check for blower wheel rubbing on blower housing or bad

motor bearings.

• Popping or squealing sound. Check for a sticky or frayed belt.

TROUBLE SHOOTING

WARNING

To avoid risk of electrical shock, personal injury or death; disconnect power to dryer before

servicing, unless testing requires power.

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TROUBLE SHOOTING

WARNING

To avoid risk of electrical shock, personal injury or death; disconnect power to dryer before

servicing, unless testing requires power.

COMPONENT TESTING PROCEDURES

Component Electrical Testing (with ohmmeter)

Thermistor resistance 10K  @ 25°C 77°F

Thermostat 1 resistance < 1



Thermostat 3 resistance < 1

- If resistance is innity, replace thermostat 3.



Thermostat 2 resistance < 1

- If resistance is innity, replace thermostat 2.

Heater resistance 10 

- If resistance is innity, replace Heater.



Measure resistance of the following terminal

1) Door switch : o

Terminal : “COM” - “NC” (1-3) < 1Ω

Terminal : “COM” - “NO” (1-2) : ∞ Ω

2) Door switch : On

Terminal : “COM” - “NC” (1-3) : ∞ Ω

Terminal : “COM” - “NO” (1-2) < 1Ω



Belt Cut-o S/W

- Lever open: Resistance value < 1

- Lever push: Resistance value : ∞ 

Lamp resistance 80~100  (Violet & gray)

Motor (Electronic & GAS)

Contacts

= Contact closed

Centrifugal Switch (Motor)

2.88 between

Pin# 3 and 4

3.5 between

Pin# 4 and 5

Function 1M 2M 3M 5M 6M

Start

Run

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