Samsung DV50F9A7EV Manual

CLOTHES DRYER

Technical Information

CAUTION

All safety information must be follwed as provided in Service Manual of

DV50F9A6E(G)*/DV50F9A7E(G)*/DV50F9A8E(G)*..

WARNING

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

before servicing, unless testing requires power.

Code No. : DC68-03171D_EN

• 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(DV50F9A6E(G)*/DV50F9A7E(G)*/DV50F9A8E(G)*)fordetailed

installation, operating, testing, troubleshooting, and disassembly instructions.

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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.

HE Invalid heating Temp in running

the dryer

Check for:

-Restrictedventsystem.

- Check Thermistor resistance.

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

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.

2E Electronic control problam

(OverVoltageError)

Check for:

- Check PCB and Wire harness.

- Check Power supply

-ReplacePCB

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

Continuous Run Mode:

1. PressMixedLoadBell+DryLevelfor7secduringPowerOnState(NormalUserMode).

2. OnceinContinuousRunMode,display“CC”for1secandthenumberofCyclefor1secand

the remaining time for 1 sec in turns.

3. ThepreviouscyclewillrestartduringContinuousRunModeuntilthemodeisdeactivated.

4. DuringContinuousRunMode,pressMixedLoadBell+DryLevelfor7secondstoreturnto

normal user mode.

Service Mode

Denition of Service Mode

- Dryer must be on before Service Mode can be entered.

- UponentryintoServiceMode,theSensorBarTouchDatawillbeshown(DefaultService

Mode).

How to Enter:

- To enter Service Mode, press Mixed Load Bell and Temp Keys for 3 seconds, until it sends out

a beeping sound.

-If pressing Mixed Load Bell + Temp Keys for 3 seconds in Service mode , it will return Normal

mode.

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

Sensor Bar Touch Data Mode

Denition of Sensor Bar Touch Data Mode:

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

- Dryer will display Sensor Bar data. This mode is default mode of entering service mode

How to Enter:

- WithPowerOnpressingMixedLoadBellandTempKeysfor3seconds

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:

- To enter cycle count mode press the Mixed Load Bell in Service Mode.

Software Version Mode

Denition of Software Version Mode:

- It is to retrieve its software version

How to Enter:

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

ex)Incaseof“U005”,U0meansmajorversion“U0”05meansminorversion“05”

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

Mixed Load Bell

+Dry Level 7 sec

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Data Display Mode

Denition of Temperature Display Mode:

- Display Mode 0 : Temperature data(Celsius)

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

- Display Mode 2 : Average Temperature(Celsius) data for 1minute

How to Enter:

- WithPowerOn,pressAdjustUpKey+AdjsutDownKeyfor7secondsuntilitsendsouta

beeping sound .

- If not pressed any keys for 5 minutes, it will be set back from Data Display Mode

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

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

• Converting °C  °F

Celsius(°C) -30 -10 10 30 50 70 F =9/5C + 32

Fahrenheit(°F) -22 14 50 86 122 158

System Check Mode

Denition of System Check Mode:

- “t2”willdisplay.

- System Check Mode(t2 mode) Progress Function Performed Start/Pause

Motor(CW)RelayOnHeaterRelayOnHeaterRelayO,Motor(CW)RelayO

How to Enter:

- WhileinPowerO,pressingtheDryLevel+Powerkeyssimultaneouslywillputthedryerinto

the System Check 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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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.

F900A DRY_DV50F_TECH MANUAL_DC68-03171D_EN(邀请翻译成法语).indd 6 2013-1-21 13:55:30

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)

10 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.

F900A DRY_DV50F_TECH MANUAL_DC68-03171D_EN(邀请翻译成法语).indd 7 2013-1-21 13:55:30

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.



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<1Ω

-Leverpush:Resistancevalue:∞Ω

VentSensing-ThermistorResistance

238.23K Ω @ 25℃77℉

Motor (Electronic & GAS)

Contacts

= Contact closed

Centrifugal Switch (Motor)

2.88Ω between

Pin# 3 and 4

3.5Ω between

Pin# 4 and 5

Function 1M 2M 3M 5M 6M

Start

Run

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GAS MODEL

TROUBLE SHOOTING

WARNING

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

servicing, unless testing requires power.

Radiant Sensor(10RS)

Resistancevalue<1Ω

Ifresistanceisinnite,replaceRadiantsensor

Igniter(101D)

Resistancevalue40~400Ω

If resistance is innite, replace Igniter

Gas Valve(25M01A)

Valve1-2:Resistancevalueabout1.2KΩ

Valve1-3:Resistancevalueabout0.5KΩ

Valve4-5:Resistancevalueabout1.2KΩ

If resistance is innity, replace Valve

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

Resistancevalue<1Ω

If resistance is innity, replace Thermostat

F900A DRY_DV50F_TECH MANUAL_DC68-03171D_EN(邀请翻译成法语).indd 9 2013-1-21 13:55:32

TROUBLE SHOOTING

WARNING

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

servicing, unless testing requires power.

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 Thermistor 1 - Disconnect harness and test

BluewirePin3toRedwirePin6.

Approx10KΩat25°C/77°F

Cycling Thermistor 2 - Disconnect harness and test

Yellow wire Pin 2 to White wire Pin 7.

CN4Approx238.23KΩat 25 °C/77 °F

CN1

1. AC Power Port

2. Door Detection Sensor

3. Motor Switch Sensor

RY7

Heater Relay Switch

RY5

Motor Relay Switch

RY2 RY3 CN5

Steam Relay Switch

F900A DRY_DV50F_TECH MANUAL_DC68-03171D_EN(邀请翻译成法语).indd 10 2013-1-21 13:55:34

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