Samsung DV457EVGSWR-AA User Manual [en, es, fr]

CLOTHES DRYER

Technical Information

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.

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.

Model: DV457* Model: DV455*

Code No. : DC68-02835D-02_EN

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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.

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

Check for:

tE3

bE2

The Thermistor resistance is very low or high.

The resistance of the thermistor for the vent blockage detection operation is very low or very high.

Running the dryer with door open

Invalid door state for more than 256 milliseconds.

Invalid state of key circuit short for 30 secs

Invalid power source Frequency

Electronic Control Problem (Over Voltage Error)

- Clogged lint screen.

- Restricted vent system.

- Check Thermistor resistance.

Check for:

- Check the vent blockage detection thermistor.

- Check the resistance of the thermistor.

Check for:

- Close the door, and run the dryer.

- Loose or open wire terminals in Door Sense circuit.

Check for:

- Loose or open wire terminals in Door Sense circuit.

Check for:

- Display PCB key circuit short or not.

Check for:

- Not using regular power source frequency

- Invalid power frequency sense circuit

Check for:

- Check PCB and Wire harness.

- Check Power supply.

Check for:

- Check PCB and Wire harness.

- Replace PCB.

Check for :

- PCB with Eeprom circuit.

Call customer service

AE4

AE3

AE5

Electronic Control Problem (Communication Error)

Invalid state of Eeprom communication

A Communication error between the WIFI PBA and the MAIN PBA

A Communication error between the DR Modem and the MAIN PBA

A Communication error between the LCD PBA and the MAIN PBA

Invalid heating Temp in running the dryer Call customer service

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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.

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 Touch Sensor Data Display 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.

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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 Cycle Count 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 Revision 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 will be incresed.

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

Denition of Data Display Mode:

- Display Mode 1 : Temperature data

- Display Mode 2 : Average Touch Sensor data for 1 minute

- Display Mode 3 : 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 increases.

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

Denition of Data Display Mode:

- Display Mode 1 : Temperature data

- Display Mode 2 : Average Touch Sensor data for 1 minute

- Display Mode 3 : 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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ALIGNMENT AND ADJUSTMENTS

WARNING

To avoid risk of electrical shock, personal injury or death; disconnect power to dryer before servicing, unless testing requires power.

Connecting to a hidden AP (DV457*)

Proposed hidden AP specications

- The product can only connect to a hidden AP when it is in Shop Demo Mode.

- After the connection is established, even if the connection is disconnected because the product

is unplugged or the AP is turned o, the connection is automatically restored when the product is plugged in again or the AP is turned on.

- AP name: The full name is displayed in the same way as an existing AP.

Enter Shop Demo Mode

(Tap 1  2  1  2  1)

The connection information input screen

appears.

The Hidden AP button appears in the

Network menu.

Tap to move to the AP name input screen.

Tap to move to the password input screen.

If an encryption method is selected, the

password input box appears.

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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.

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

Please follow below instruction for the trouble diagnosis and parts 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.

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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.

No Problem What To Do

• 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).

1 Will Not Start or Run

Motor runs/ tumbler

will not turn

Runs a few minutes

and then stops

• 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.

• Belt o or broken/damaged.

• Idler tension spring too weak or stretched.

• Idler pulley jammed or stuck.

• Lint buildup around drive motor.

• Low voltage present.

• Blower impeller blocked in blower housing.

• Drive motor - start switch contacts stuck closed.

Blows fuses or trips

circuit breaker

Blows fuses or trips

circuit breaker (Gas Model)

Will not heat (motor

runs)

Will Not Dry Gas

Model Poor Gas Ignition

• 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.

• 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.

Open heating element.

• Hi-Limit trips easily or is open.

• Regulating thermostat trips easily or is open.

• Membrane switch open.

• Check Thermistor.

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:

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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.

No Problem What To Do

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

• Open ame sensor

The igniter does not

glow

Igniter glows - No

gas ignition

The gas is ignited

but the ame goes out

Improper drying clothes wrinkled

Rough texture long dry time

Noisy and/Or

Vibration

• Open igniter

• Shorted booster coil

• Open wiring

• Bad motor switch ( Neutral supply)

• No power from control ( L1 supply)

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)

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

• 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.

• 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.

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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 Ω @ 25°C 77°F



Thermostat 1 resistance < 1Ω



Thermostat 3 resistance < 1Ω

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



Thermostat 2 resistance < 1Ω

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



Heater resistance 10 Ω

- If resistance is innity, replace Heater.



Belt Cut-o S/W

- Lever open: Resistance value < 1Ω

- Lever push: Resistance value : ∞ Ω



Lamp resistance 80~100 Ω (Violet & gray)



Motor (Electronic & GAS)

Contacts



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

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Function 1M 2M 3M 5M 6M

Start

Run

= Contact closed



Centrifugal Switch (Motor)

2.88Ω between Pin# 3 and 4

3.5Ω between Pin# 4 and 5

TROUBLE SHOOTING

WARNING

To avoid risk of electrical shock, personal injury or death; disconnect power to dryer before servicing, unless testing requires power.

THERMISTOR

238.23Ω @ 25 °C 77

GAS MODEL

Radiant Sensor(10RS)

Resistance value < 1 Ω If resistance is innite, replace Radiant sensor

Gas Valve(25M01A)

Valve 1-2 : Resistance value about 1365 Ω Valve 1-3 : Resistance value about 560 Ω Valve 4-5 : Resistance value about 1325 Ω If resistance is innity, replace Valve

Igniter(101D)

Resistance value 40~400 Ω If resistance is innite, replace Igniter

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Thermostat (60T21 Hi-Limit)230F-50F

Resistance value < 1 Ω If resistance is innity, replace Thermostat

TROUBLE SHOOTING

WARNING

To avoid risk of electrical shock, personal injury or death; disconnect power to dryer before servicing, unless testing requires power.

CN1

- AC Power Port

- Door Detection Sensor

- Motor Switch Check

RY5

- Motor Relay Switch

RY7

- Heater1 Relay Switch

Sensor Bars & temperature sensor check

Sensor Bars - Disconnect harness and test Pink

wire Pin 4 to Orange wire Pin 5. Approx ∞ Ω without laundry Approx 190Ω ± 10% with wet clothes

CN4 LCD connector (BEST only)

RY6

- Heater2 Relay Switch

- ELEC model only

Cycling Thermistor1 - Disconnect harness and test Blue wire Pin 3 to Red wire Pin 6.

Approx 10 KΩ at 25 °C / 77 °F

Cycling Thermistor2 - Disconnect harness and test Yellow wire Pin 2 to White wire Pin 7.

Approx 238.231 KΩ at 25 °C / 77 °F

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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.

3-WIRE system connections

A. External ground connector B. Neutral grounding wire (green/yellow) C. Center silver-colored terminal block screw D. Neutral wire (white or center wire) E. ¾” (1.9 cm) UL-listed strain relief

1. Loosen or remove the center terminal block screw.

2. Connect the neutral wire (white or center wire) of the power cord to the center, silver-colored terminal screw of the terminal block. Tighten screw.

3. Connect the other wires to outer terminal block screws. Tighten screws.

4. Tighten the strain relief screws.

5. Insert the tab of the terminal block cover into your Dryer’s rear panel slot. Secure the cover with a hold-down screw.

If converting from a 4-wire electrical system to a 3-wire, the ground strap must be reconnected to the terminal block support to ground the Dryer frame to the neutral conductor.

4-WIRE system connections

A. External ground connector B. Green or bare copper wire of power cord C. ¾” (1.9 cm) UL-listed strain relief D. Center silver-colored terminal block screw E. Neutral Grounding wire (green/yellow) F. Neutral wire (white or center wire)

1. Remove the External ground connector screw.

2. Connect the ground wire (green or unwrapped) of the power cord to the external ground connector screw. If you want to connect B(Green or bare copper wire of power cord) to the Neutral Post without assembling with A(cabinet ground), call the service technician.

3. Loosen or remove the center terminal block screw.

4. Connect the neutral wire (white or center wire) of the power cord and the appliance ground wire (green with yellow stripes) under the central screw of the terminal block.

5. Connect the other wires to the outer terminal block screws. Tighten screws.

6. Tighten the strain relief screws.

7. Insert the tab of the terminal block cover into your Dryer’s rear panel slot. Secure the cover with a hold-down screw.

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WIRING DIAGRAM

WARNING

To avoid risk of electrical shock, personal injury or death; disconnect power to dryer before servicing, unless testing requires power.

WIRING DIAGRAM

DV457E*, DV455E*

DV457G*, DV455G*

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