Samsung DV457EVGSGR User Manual

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-01_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:
	tE	The Thermistor resistance is very low or	- Clogged lint screen.
		high.	- Restricted vent system.
			- Check Thermistor resistance.
		The resistance of the thermistor for the vent	Check for:
			- Check the vent blockage detection
	tE3	blockage detection operation is very low or
			thermistor.
		very high.
			- Check the resistance of the thermistor.
			Check for:
	dE	Running the dryer with door open	- Close the door, and run the dryer.
			- Loose or open wire terminals in Door
			Sense circuit.
		Invalid door state for more than 256	Check for:
	dF		- Loose or open wire terminals in Door
		milliseconds.
			Sense circuit.
	bE2	Invalid state of key circuit short for 30 secs	Check for:
			- Display PCB key circuit short or not.
			Check for:
	FE	Invalid power source Frequency	- Not using regular power source
			frequency
			- Invalid power frequency sense circuit
		Electronic Control Problem	Check for:
	2E		- Check PCB and Wire harness.
		(Over Voltage Error)
			- Check Power supply.
		Electronic Control Problem	Check for:
	AE		- Check PCB and Wire harness.
		(Communication Error)
			- Replace PCB.
	Et	Invalid state of Eeprom communication	Check for :
			- PCB with Eeprom circuit.
	AE4	A Communication error between the WIFI	Call customer service
		PBA and the MAIN PBA
	AE3	A Communication error between the DR	Call customer service
		Modem and the MAIN PBA
	AE5	A Communication error between the LCD	Call customer service
		PBA and the MAIN PBA
	HE	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 influenced.

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

Definition 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.

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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

Definition 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

Definition 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.

Definition 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.

Definition 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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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 configured 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 differ 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
		Will Not Start or Run	•	Table for codedefinition).
	1			Start/Pause rotary selector dial functional.
			•	Control Board operational.
			•	Belt off or broken and Belt Cut-off Switch operates.
			•	Drive motor functional.
			•	Check motor winding resistance: 2.88ohms between pin #3 and 4,
				3.5ohms between pin #4 and 5.
		Motor runs/ tumbler	•	Belt off or broken/damaged.
	2		•	Idler tension spring too weak or stretched.
		will not turn
			•	Idler pulley jammed or stuck.
		Runs a few minutes	•	Lint buildup around drive motor.
	3		•	Low voltage present.
		and then stops	•	Blower impeller blocked in blower housing.
			•	Drive motor - start switch contacts stuck closed.
			•	Is the belt connected well?
		Blows fuses or trips	•	Is the winding of the motor continuous?
	4			(Rotor winding, stator winding, generator)
		circuit breaker	•	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,
		Blows fuses or trips		then the house wiring, fuse box or circuit breaker is suspected to be
	5	circuit breaker (Gas	•	at fault.
		Model)		Igniter harness loose and shorted to base.
			•	Incorrect wiring or wire shorted to ground.
			•	Drive motor winding shorting to ground.
			Open heating element.
		Will not heat (motor	•	Hi-Limit trips easily or is open.
	6		•	Regulating thermostat trips easily or is open.
		runs)
			•	Membrane switch open.
			•	Check Thermistor.
		Will Not Dry Gas	When the dryer is operated on a heat setting, the igniter should be
			energized and burner shall fire within 45 seconds at 120 VAC. The failure
	7	Model Poor Gas
			of a component in this system will usually be indicated by one of three
		Ignition
			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 flame sensor
	8	The igniter does not	•	Open igniter
		glow	•	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 flame is not ignited, remove
			power and using an ohmmeter, check the following:
	9	Igniter glows - No	•	Open secondary coil
		gas ignition	•	Open holding coil
			•	Open wire harness
			•	Stuck flame sensor (Stuck closed)
			If a normal ignition takes place and after a short while the flame goes out,
			check for the following:
		The gas is ignited	•	Radiant sensor contacts opening prematurely.
	10	but the flame goes	•	Weak gas valve coil may open when stressed by higher Temps.
		out	•	Weak Hi-Limit
			•	Poor venting
			•	Bad drum seals
			•	Lint filter is not clean.
			•	Restriction in exhaust.
		Improper drying	•	Outside exhaust hood damper door stuck closed.
			•	Exhaust too long, too many elbows, flex ductwork installed.
	11	clothes wrinkled	•	Poor intake air available for the dryer.
		Rough texture long	•	Incorrect tumbler speed. Tumbler belt slipping.
		dry time	•	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 insufficient spin out by washer.
			•	Thumping Check for loose tumbler baffle, 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
		Noisy and/Or		wheel area.
	12		•	Scraping Check for front or rear bulkhead felt seal out of position or
		Vibration
				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 infinity, replace thermostat 3.

Thermostat 2 resistance < 1Ω

-If resistance is infinity, replace thermostat 2.

Heater resistance 10 Ω

-If resistance is infinity, replace Heater.

Belt Cut-off 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	Function 1M 2M 3M 5M 6M
		Start
	1) Door switch : off
	Terminal : “COM” - “NC” (1-3) < 1Ω	Run
	Terminal : “COM” - “NO” (1-2) : ∞ Ω	= Contact closed
	2) Door switch : On
		Centrifugal Switch (Motor)
	Terminal : “COM” - “NC” (1-3) : ∞ Ω
	Terminal : “COM” - “NO” (1-2) < 1Ω	2.88Ω between
		Pin# 3 and 4
		3.5Ω between
		Pin# 4 and 5

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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.

THERMISTOR

238.23Ω @ 25 °C 77

GAS MODEL

Radiant Sensor(10RS)	Gas Valve(25M01A)
Resistance value < 1 Ω	Valve 1-2	: Resistance value about 1365 Ω
If resistance is infinite, replace Radiant sensor	Valve 1-3	: Resistance value about 560 Ω
	Valve 4-5	: Resistance value about 1325 Ω
	If resistance is infinity, replace Valve

Igniter(101D)
Resistance value 40~400 Ω
If resistance is infinite, replace Igniter	Thermostat (60T21 Hi-Limit)230F-50F
	Resistance value < 1 Ω
	If resistance is infinity, replace Thermostat

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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.

CN1

-AC Power Port

-Door Detection Sensor

-Motor Switch Check

CN4

LCD connector (BEST only)

RY5					RY7		RY6
- Motor Relay Switch					- Heater1 Relay Switch		- Heater2 Relay Switch
							- ELEC model only

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

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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