Samsung WF361 Series Manual

1
WASHING MACHINE
Technical Information
ModelS : WF361*
WF363*
WF365*
WF364*
Code No. : DC68-03207A-03_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fordetailedinstallation,operating,testing,troubleshooting,and
disassemblyinstructions.
AllsafetyinformationmustbefollowedasprovidedinServiceManual.
CAUTION
Toavoidriskofelectricalshock,personalinjuryordeath;disconnectpowertowasher
beforeservicing,unlesstestingrequirespower.
WARNING
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ALIGNMENT AND ADJUSTMENTS
2
GENERAL ERROR FUNCTION
NO
Error Code
(Diagnostic Code
Error Image)
Description Corrective Action
1nd
Thewaterlevelfailstodropbelow
theResetWaterLevelwithin15
minutes.
Goto“WillNotDrain”
TroubleshootingSection.
2LO DoorfailstoUnlockAfter7attempts. Goto“WillNotUnlock”
TroubleshootingSection.
3nF
WhenthellingContinuesfor
morethan40minutesorthereisno
changeofwaterlevelfor6minutes.
Goto“NoWaterFill”
TroubleshootingSection.
4 FL Doorfailstolockafter7attempts. Goto“WillNotLock”
TroubleshootingSection.
5 LE
AwaterlevellowerthantheReset
waterlevelisdetectedfor5seconds
duringtheWash/Rinsecycle.
Goto“NoWaterFill”Troubleshooting
Section.
6 1E
WaterLevelSensorTrouble.(When
theinputsignalfromthewaterlevel
sensorisoutofrange,theunitwill
sendoutbeepingsoundsandhalts
thecycle.)
Goto“NoWaterFill”
TroubleshootingSection
7OE
Afaultisdetectedinthewaterlevel
sensor.Data(frequency)shows
thewaterlevelisatorabovethe
overowwaterlevel.(Whenthis
conditionisdetected,themachine
willautomaticallystartsdraining
wateruntilthewaterlevelfalls
belowtheresetwaterlevel)
Firstchecktoseethatallofwater
valvesarenotstuck.Ifwatervalves
areOK,checkwaterlevel.
8dc
Unbalanceorcabinetbumpis
detectedduringnalspin,which
preventsthedrumfromspinning
over150rpm.(Neverexceeds150
RPMduetounbalancedload)
Goto“WetClothes”Troubleshooting
Section.
9 E2
JammedKey.(Whenkeyinput
signalsarecomingoutformorethan
30seconds,itisregardedasajam.)
Checkallofkeys.IfAkeyissensed
tobepressed,allkeyswilldonot
respond.
Toavoidriskofelectricalshock,personalinjuryordeath;disconnectpowertowasher
beforeservicing,unlesstestingrequirespower.
WARNING
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ALIGNMENT AND ADJUSTMENTS
3
NO
Error Code
(Diagnostic Code
Error Image)
Description Corrective Action
10 ds Doorisdetectedasopenwhileitis
tryingtolockthedoor.
Goto“QuickTestMode”andthendo
DoorLock/UnlockTest
11 tE
Abnormalhigh/lowtemperatureor
resistance(ThermalsensororPBA
resistance).
Goto“BoardInputTest”andcheck
WaterTemperature.Checkloose
orpinchedwires.ReplacePCBor
thermistor.
12 3E
MICOMisattemptingtodrivethemotor
butisnotgettinganyresponsesignals
fromthehallsensor.Visualcheckshows
motorisnotrunning.(Locked,Defective
HallSensororOverload)(WF364*)
Evaluatewireharnessforlooseor
unhookedconnections.Goto“
QuickTestMode”andtestMotor.
MICOMisattemptingtodrivethe
motorbutisnotgettinganyresponse
signalsfromthecurrent.Visualcheck
showsmotorisnotrunning.(Lockedor
Overload)
13 Hr HeaterRelayFailure(NoHeater
RelayCheckSignal) ReplacePCB
14 nF1 Thehot/coldwaterhoseconnection
isnotcorrect.
Pleaseconnectthehot/coldwater
hoseconnectioncorrectly.
15 2E Voltageformotorcontrolbusisover
orunderspeciedlimit. ReplacePCB
16 SUd
Sudsisdetectedduringthewashing
session.(“SUdS”isnotanerror.Ifthe
washerisinsudsperiod,“SUdS”will
lightupinsteadofremainingtime.)
Guideausertoreduceamountof
detergentusage.
17 AE
CommunicationerrorbetweenSUB
PBAandMAINPBA
CheckMainPBA,SUBPBA&Wire-
harness.ReplacePCB
18 SF SystemError ReplacePCB
Toavoidriskofelectricalshock,personalinjuryordeath;disconnectpowertowasher
beforeservicing,unlesstestingrequirespower.
WARNING
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ALIGNMENT AND ADJUSTMENTS
4
TEST MODE
Test Mode:
EachTestModefortheBIGBANGisasfollowsin
thecomingpages.Thetestmodesindicatedby
theredarrowsaremodesunabletogetanaccess
oncethewashingcyclehasstartedduetosafety
resons.
Quick Test Mode
Toavoidriskofelectricalshock,personalinjuryordeath;disconnectpowertowasher
beforeservicing,unlesstestingrequirespower.
WARNING
Special Test Mode
Power Off State
Quick Test Mode
EEPROM Clear
Mode
Continuous Cycle
Mode
Service Mode
Demo Mode
Quick Spin Test Mode
Cycle Count Check Mode
S/W Version Check Mode
Fast Time Down Test Mode
Board Input Test Mode
Diagnostic Code
CheckMode
Power On State
(Normal User Mode)
10
211 2 7
39
1
6 8
5
4
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ALIGNMENT AND ADJUSTMENTS
5
Denition of Quick Test Mode:
- CheckoperationofallLED’s(VerifyfaultyLED).
- Checkmodelandsoftwareversion.
- Checkdierentoperatingmodes(e.g.watervalve,motor,door,drainpump,etc.).
How to Enter:
- Plugintheunit.
- PressSoilKey,SpinKeyandPowerKeyatthesameTime.
Quick Test Mode:
1. AllLED’slightupanditsendsoutBeepSoundwhenit
entersintotheQuickTestMode.(Including7-Segment)
2. DisplayssoftwareversionforasecandClearEEprom.(Ex.If
S/WVersionis04,7-SegmentwilldisplayUd04)
3. Whentheversionisdisplayed,turntheJog-Dialsothat
theversiondisappears.Pressthefollowingkeystotestthe
variouscomponents.
-TempKey:WaterValveTest
-SpinKey:DoorLock/UnlockTest
-SoilKey:WaterHeaterTest
-Signal:DrainPumpTest
EEPROM Clear Check
Denition of EEPROM Clear Mode:
- EEPROMinitialization.
- Allcourse/optionsettingsaretoberesettodefault
valuesafterEEPROMinitialization.
- WhenServicearisesanditneedsPCBreplacement,
EEPROMshouldbereset.
How to Enter:
- Theunitneedstobeon.
- PressDelayStartKey,andPowerKeyatthesame
time.
Toavoidriskofelectricalshock,personalinjuryordeath;disconnectpowertowasher
beforeservicing,unlesstestingrequirespower.
WARNING
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ALIGNMENT AND ADJUSTMENTS
6
Continuous Run Mode
Denition of Continuous Run Mode:
- WillcontinuouslyrepeatthecurrentcycleuntiltheContinuousRunModeiscancelled.
How to Enter:
- PressDelayStartKey+ChildLockKey(Spin+SoilLevel)togetherfor7sec.
Continuous Run Mode:
1. Press
DelayStartKey+ChildLockKey(Spin+SoilLevel) for7secduringPowerOnState(Normal
UserMode).
2.
OnceinContinuousRunMode,Thesevensegmentswillnolongerdisplay“0000”andwillalternate
betweendisplayingthenumberofcyclesofthecompletedcourseandtheremainingtimeofthecourse.
3. TheContinuousRunModewillrepeatthepreviouscycleuntilcontinuousrunmodeiscancelled.
4.
DuringContinuousRunMode,pressDelayStartKey+ChildLockKey(Spin+SoilLevel)for7secto
returntonormalusermode.Thesevensegmentswillnolongerdisplaythenumberofcyclesand
willdisplaythemaintenancetimeonly.
5. IfyouexitServiceModeafterenteringitfromContinuousMode,thewashingmachinereturns
toContinuousMode.
6. IfpowerislostinContinuousRunMode(thatis,whenthepowerplugisdisconnectedorthe
Powerkeyispressedturningthewashingmachineo),themodeisreleasedwhenthewashing
machineisturnedonagain.
Service Mode
Denition of Service Mode:
- ServiceModeenablesservicetechnicianstoverifytheoperationofthewashingmachineand
dotroubleshooting.
- ServiceModecanbeenteredduringallwashingcyclewithoutinterruptingthecycleexcept
someoftestmodes.
- VarioustestscanbedonewithServiceMode.So,troubleshootingcanbedonebasedonthe
resultingdiagnosticcodes.
How to Enter:
- ToentertheServiceMode,presstheDelayStart+SpinKeyfor3secondsoruntiltheunitsends
outbeepingsounds.
Toavoidriskofelectricalshock,personalinjuryordeath;disconnectpowertowasher
beforeservicing,unlesstestingrequirespower.
WARNING
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ALIGNMENT AND ADJUSTMENTS
7
Service Mode
Service Mode:
1.ThewashermustbeontogointotheServiceMode.
2.Themotorspeedwillbedisplayedwhenstarted(Itdisplays0whenthemotordoesnotspin).
3.Thepresentstateofthemachinewillnotbechanged.
(i.e.,thecurrentcycleinprogresswillnotbeinterruptedandonlythedisplaywillchange)
4. ToexitServiceMode,pressDelayStart+SpinKey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.
Quick Spin Test Mode
Denition of Quick Spin Test Mode:
- QuickSpinTestModeistodoSpinCheck.(HighRPM)
How to Enter:
- DuringServiceMode,presstheDelayStartandTemp.Keysfor3secondstoenterQuickSpin
TestMode.
- Cannotenteroncethewashingcyclehasstarted.
Quick Spin Test Mode:
AsitentersintotheQuickSpinTestMode,itstartsspinningandreachestoitsmaximumRPM.
OncetheSpinspeedreachesthemaximumRPM,thespeeddropsimmediately.
ToholdQuickSpinTestMode(enteringHoldSpeedMode),presstheStart/Pausebutton.Ifthe
Start/PausebuttonispressedduringQuickSpinTestMode,itwillstopacceleratingandholdits
spinningspeedfor10minutesbeforegoingbacktoQuickSpinTestMode.
Also,tocanceltheholdandallowQuickSpinTestModetocontinue,presstheDelayStartand
TempKeystogetherfor3seconds.
IfyouholddowntheDelayStartandTemp.keysforthree(3)secondswhenthewashingmachine
isnotinHoldSpeedMode,QuickSpinModeisexitedandServiceModeisrestored.
Toavoidriskofelectricalshock,personalinjuryordeath;disconnectpowertowasher
beforeservicing,unlesstestingrequirespower.
WARNING
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ALIGNMENT AND ADJUSTMENTS
8
Cycle Count Check Mode
Denition of Cycle Count Check Mode:
- CycleCountCheckModeistotallyupthenumberofwashings.
How to Enter:
- ToentertheCycleCountCheckMode,presstheSignalKeyduringServiceMode.
Cycle Count Check Mode:
1. ActivatetheServiceModeinadvance.
2.WhentheSignalkeyispressed,thetotalnumberofwashingswilllightupandasignalLEDwill
glow.
3.Themaximumnumberofcycleswillbe1999.
Thecounterwillrolloverto0andstartcountingagainafter1999.
4.Thecountingwillbecarriedoutattheendofthenormalcycle.
(FornormalandContinuousRuncycles,thecountiscarriedoutattheendofthecycles.
5. ToexittheCycleCountCheckMode,pressthe“Signal”keyagain.
S/W Version Check Mode
Denition of S/W Version Check Mode:
- S/WVersionCheckModeistobringupS/WVersioninformation.
How to Enter:
- ToentertheS/WVersionCheckMode,presstheSoilLevelKeyduringServiceMode.
S/W Version Check Mode:
1. ActivatetheServiceModeinadvance.
2. PresstheSoilLevelKeytobringupitssoftwareVersion
EX)GenerateUd04atVersion04(UdisMicomcode,04isit’ssoftwareversion)
3. ToexittheS/WVersionCheckMode,presstheSoilLevelS/Wonceagain.
Then,itreturnstotheServiceModewithmotorRPMilluminating.
Toavoidriskofelectricalshock,personalinjuryordeath;disconnectpowertowasher
beforeservicing,unlesstestingrequirespower.
WARNING
[BIGBANG]Technical_information-03207A-03_EN.indd 8 2013-7-16 17:15:06

ALIGNMENT AND ADJUSTMENTS
9
Fast Time Down Test Mode
Denition of Fast Time Down Test Mode:
- FastTimeDownTestModeistoforwardtheprogramtothenextcyclestage.
How to Enter:
- ToentertheFastTimeDownTestMode,presstheTempkeyduringServiceMode.
Fast Time Down Test Mode:
1. ActivatetheServiceModeinadvance.
2. Toforwardtheprogramtothenextcyclestage,presstheTempkey.
Each stage is located at key points of a complete cycle as follows:
- EndofEachFill(BeginningofWashorRinseTumbleSession)
Caution:CheckifthecurrentwaterlevelishigherthantheResetwaterlevelandthenperform
theFasttimedowntest.
- BeginningofDrainSession
- BeginningofSpinSession(Here,itchecksthewaterlevel.So,ifitisovertheresetlevel,itcarries
outdrainingbeforethespinning.)
- BeginningofFillSession
- BeginningofBleachFill
- BeginningofFabricSoftenerFill
- Every3minutesduringWashandRinseTumbleSession
Toavoidriskofelectricalshock,personalinjuryordeath;disconnectpowertowasher
beforeservicing,unlesstestingrequirespower.
WARNING
[BIGBANG]Technical_information-03207A-03_EN.indd 9 2013-7-16 17:15:06

ALIGNMENT AND ADJUSTMENTS
10
Board Input Test Mode
Denition of Board Input Test Mode:
- BoardInputTestModeistodisplaysaspeciedinputafterakeypress.
How to Enter:
- ToentertheBoardInputTestMode,presstheExtraRinsekeyduringServiceMode.
Board Input Test Mode:
1. ActivatetheServiceModerst.
2. PressthekeytostartBoardInputTest.
3.TurntheJog-DialsothatthenormalcourseLEDisturnedon,andTheWaterTemperaturewillbe
displayedinCelsius.
4.TurntheJog-DialsothattheHeavydutycycleLEDisturnedon,TheWaterTemperaturewillbe
displayedinFahrenheit.
5.TurntheJog-DialsothatthePermPresscycleLEDisturnedon,Thedoorstatuswillbedisplayed
(OPifopen,CLifclosed).
6. TurntheJog-DialsothatSanitizeLEDisturnedon,TheDoorLockSwitchstatuswillbedisplayed
(ULifunlocked,LOiflocked).
Toavoidriskofelectricalshock,personalinjuryordeath;disconnectpowertowasher
beforeservicing,unlesstestingrequirespower.
WARNING
[BIGBANG]Technical_information-03207A-03_EN.indd 10 2013-7-16 17:15:07

ALIGNMENT AND ADJUSTMENTS
11
Diagnostic Code Check Mode
Denition of Diagnostic Code Check Mode:
- DiagnosticCodeCheckModeistobringupthestoreddiagnosticcodes(referecodesforservice
technicians).
How to Enter:
- ToentertheDiagnosticCodeCheckModewithcode“d”ashing,presstheSpinkeyduring
ServiceMode.
Board Input Test Mode:
1.ActivatetheServiceModerst.
2. Pressthe“Spinkey”keytostartErrorCodeCheckModewithCode“d”ashing.
3. Tocyclethroughtheerrorcodes,turntheRotaryCycleSelectorinonedirection(either
ClockwiseorCounterclockwise).
4. Now,whenturningtheRotarySelectorKeyinthesamedirection,itshowserrorcodesfromthe
latest.
5. Whenturningitintheoppositedirection,itshowstheerrorcodesinthereverseorder.
Toavoidriskofelectricalshock,personalinjuryordeath;disconnectpowertowasher
beforeservicing,unlesstestingrequirespower.
WARNING
Service Mode Spin Diagnostic Code
[BIGBANG]Technical_information-03207A-03_EN.indd 11 2013-7-16 17:15:07

ALIGNMENT AND ADJUSTMENTS
12
Demo Mode
- DemomodeisenteredwhentheDelayStart+SoilLevelbuttonsarehelddownforve(5)
secondssimultaneouslyinthepoweronstate.
- WhenenteringDemomode,thebuzzerringsthree(3)timesand“----”isdisplayedonthe7
segmentdisplayandallotherLEDsareturnedo.(InitialDemomode)
- DemomodeconsistsofWASH,SPINandLEDmodes.
- IftheTempbuttonispressedduringtheinitialDemomode,“WASH”blinksonthe7segment
displayandthewashingmachineentersWASHmode.
- IftheStart/PausebuttonispressedinWASHmode,thedoorislocked(DoorLock)andthemotor
rotatesleftandrightat45RPMina7seconand3-secocycle.
- WASHmodecontinuesuptove(5)minutesoncestarted.Aftertheve(5)minuteshave
elapsed,“----”isdisplayedonthe7segmentdisplayandtheinitialDemomodeismaintained.
- IftheStart/PausebuttonispressedduringaWASHmodeoperation,“----”isdisplayedonthe7
segmentdisplayandtheinitialDemomodeismaintained.
- IftheSpinbuttonispressedintheinitialDemomode,“Spin”blinksonthe7segmentdisplay
andthewashingmachineentersSPINmode.
- IftheStart/PausebuttonispressedintheSPINmode,thedoorislocked(DoorLock)andaspin
isoperatedat1150RPM.Whenthespeedreaches0RPM,theNoSpin,Low,Medium,High,and
ExtraHighLEDsareturnedon.
- Duringaspinoperation,theNoSpinLEDturnsonwhenthespeedislowerthan400RPM.The
LowLEDturnsonbetween400RPMand700RPM.TheMediumLEDturnsonbetween700RPM
and900RPM.TheHighLEDturnsonbetween900RPMand1100RPM.AllspinspeedLEDturn
omorethan1100RPM.
- SPINmodecontinuesuptofour(4)minutesoncestarted.Afterthefour(4)minuteshave
elapsed,“----”isdisplayedonthe7segmentdisplayandtheinitialDemomodeismaintained.
- IftheStart/PausebuttonispressedduringaSPINmodeoperation,“----”isdisplayedonthe7
segmentdisplayandtheinitialDemomodeismaintained.
- IftheStart/PausebuttonispressedinLEDmode,allLEDsareturnedon.TheLEDmode
continuesuptothirty(30)secondsoncestarted.Afterthethirty(30)secondshaveelapsed,“---
-”isdisplayedonthe7segmentdisplayandtheinitialDemomodeisentered.
- IftheStart/PausebuttonispressedduringanLEDmodeoperation,“----”isdisplayedonthe7
segmentdisplayandtheinitialDemomodeisentered.
Toavoidriskofelectricalshock,personalinjuryordeath;disconnectpowertowasher
beforeservicing,unlesstestingrequirespower.
WARNING
[BIGBANG]Technical_information-03207A-03_EN.indd 12 2013-7-16 17:15:07

13
TROUBLE DIAGNOSIS
- Asthemicomwash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machineorthehumanbody,preparethehumanbodyearthorremovethepotential
dierenceofthehumanbodyandmachinebycontactingthepowersupplyplugwhenthe
workcontactingtoPCBisexecuted.
2)SinceAC120VisappliedtothetriacT1andT2onP.C.B,theelectricshockmayoccurbytouching
andbecarefulthatthestrongandweakelectricityaremixed.
3)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.
TROUBLE SHOOTING
Toavoidriskofelectricalshock,personalinjuryordeath;disconnectpowertowasher
beforeservicing,unlesstestingrequirespower.
WARNING
[BIGBANG]Technical_information-03207A-03_EN.indd 13 2013-7-16 17:15:08

14
TROUBLE DIAGNOSIS
Will Not Start
• Plugtheunitintothewalloutlet.Checkforpropervoltage.
• Checkfuseorresetcircuitbreaker.
• PushanykeytoturnonthewasherandpresstheStart/Pausekeytorunthewasher.
• ClosedoorandpushtheStart/Pausekeytorunthewasher.
• Checkifwasherisinapause,soakorsudsprocess.Waitbrieyanditmaystart.(Ifthewasherisinsuds
period,Sudswilllightupinsteadofremainingtime.)
• Checkforrestricteddrainsystem.(Ifthereiselectricalproblemindrainsystem,“nd”errorwilloccurafter15
minutes.)
• CheckWaterSupply.
• Checkthelineorwatervalvescreenlter.
• CheckifPCBconnectorsareassembledproperly.
• CheckifCN2terminalsonPCBareingoodcondition.(RefertoPCBConnectorCheck.)
• ReplacePCB.
Leaking
• Makesureinlethoseconnectionsarenotleaking.Checkforrubbergasketdamageduetoovertightening.
• Checkstandpipeforleak.Wrapadryragaroundthestandpipeopening.
Ifragbecomeswet,leakisfaultofhomeplumbing.
Besurethestandpipeiscapableofacceptingtheowofwaterfromthewasher.
• Makesureendofdrainhoseiscorrectlyinsertedandsecuredtodrainstandpipe.
• Checkinternalhoseconnections(ll,drainsystems,dispenserhoses&clamps).
• Checkrubberboot.Remove,repositionandreinstall,ifnecessary.
• Checkforpossiblekinkeddispensertooutertubhose.Hotwaterpressurizationmayforcedooropen.
No Tumble
• Startnormalcyclewithanemptymachineandallowalltochecktumble.
• PerformQuickSpinTest.(Beforetest,makesurethatthetumblerisempty.)
• CheckforlooseconnectionsatMachineControlBoard,PressureSwitch,Motor,TachHarnessandMotor
Control.(Refertothecomponenttestingprocedure)
• Checkmotorwindingsresistance.
CN1pins1&3=11.6ohms±7%(WF364*),CN1pins1&3=10.6ohms±7%(WF361*/WF363*/WF365*)
Pins1&2=11.6ohms±7%(WF364*),Pins1&2=10.6ohms±7%(WF361*/WF363*/WF365*)
Pins2&3=11.6ohms±7%(WF364*),Pins2&3=10.6ohms±7%(WF361*/WF363*/WF365*)
• FaultyMainControlBoard.
• Faultymotor.
Will Not Spin
• Makesuretoclosethedoorcompletely.
• Checkforwaterleftinsidethewasher.Ifso,goto“WillNotDrain”.
• PerformQuickTestModeorQuickSpinTest.Doesthewasherspin?(Beforethetest,emptytheunitinside.)
Ifitdoesn’ttumbleaftertheabove,changePCB.Whentheproblempersists,changethemotor.
• PerformQuickTestModeorQuickSpinTest.Doesthewasherspin?Ifitdoes,CheckPossibleunbalanced
loadscenarioinnormalmode.
• CheckforlooseconnectionsatPCB,WaterLevelSensor,Motor,WireHarness.(CN7,CN1)(WF364*)or
(CN4,CN1)(WF361*/WF363*/WF365*)(RefertotheComponentTestingProcedure.)
• Checkmotorwindingsresistance.(CN1Pin1&3=11.6ohms(WF364*),CN1pins1&3=10.6ohms±7%
(WF361*/WF363*/WF365*)(at±7%20°C/68°F),
Pin1&2=11.6ohms(at±7%20°C),
Pin2&3=11.6ohms(at±7%20°C))
TROUBLE SHOOTING
Toavoidriskofelectricalshock,personalinjuryordeath;disconnectpowertowasher
beforeservicing,unlesstestingrequirespower.
WARNING
[BIGBANG]Technical_information-03207A-03_EN.indd 14 2013-7-16 17:15:08

15
TROUBLE DIAGNOSIS
No Water Fill
• PerformQuickTestMode.CheckallofWaterValvesvisually.
(PreWashValve,ColdWaterValve,BleachWaterValve,SoftenerdispensesusingCold&BleachWaterValve,
andHotWaterValve.)
• Checkifwatertapsareturnedonfully.
• CheckWaterValvesandWaterLevelSensor(RefertoPCBConnectorCheck)
• Checkifthereisanykinkininlethoses.
• Checkifinletscreensarecloggedup.
• Checkifwaterhasenoughpressure.Ifso,ndoutitscontributors.
• Checkifthereisanyfrozenareaintheunit(DrainHose,etc)
• MeasuretheresistanceofWaterValveCoil.
(Itshouldread1.18Kohms.CheckPin#1ofCN2andPIN#1,2,3ofCN5)
• CheckPressureS/WandPCBforlooseconnections.(RefertoPCBConnectorCheck.)
Tub Full of Suds
• Goto“WillNotDrain”and“WillNotSpin”andcheckthedraining.
• CheckPCBandDrainPumpforanyloosewireconnection.
• PerformQuickTestModeorBoardOutputTesttodrain.
• UseHE(High-Eciency)orlowsudsingdetergentspeciallyformulatedforfrontloadwashers.
• Reducetheamountofdetergentforthatspecicloadsizeandsoillevel.Keepinmindthattowelcreates
moresudsgenerally.
• Reducetheamountofdetergentwhenwaterissoft,orlaundryissmallorlightlysoiled.
• Doonemorewashingcyclewithcoldwaterandatablespoonofsaltwithoutdetergent.
Wet Clothes
• Unbalanceduetonotenoughload.Putadditionalload.
•
 Duetoexcessivesudsbyusinggeneraldetergent.UseHE(High-Eciency)orreduceitsquantity.
• LowSpinSpeedorDrainOnlywasselected.
• Goto“WillNotSpin”.
Will Not Lock
• Doorisnotalignedorclosedproperly.
• PerformQuickTestMode.CheckDoorLock.
ChecktheoutputvoltageofDoorLockCoil.
Ifitreads120V,changeDoorLockSwitch,andifnot,changePCB.(RefertoPCBConnectorCheck.)
• ReadLockSwitchandPCB(CN5).(RefertoPCBConnectorCheck.)
• TryDoorLockandcheckfor120VtoDoorLockConnector.If120Vpresent,changeMainControlBoardand
ifnot,changeDoorLockswitch.
Will Not Unlock
• Checkifthedoorisbeingpushedout,whichmaykeepitfromunlocking.
• Doorlocksitselfwhenthewaterlevelistoohigh.Openingdoorwillresultinwaterdrainingfromdoor
opening.
• CheckthefollowingwithBoardInputTestMode.
WaterLevel(frequency):Over23.80KHz.
Ifso,referto“WillNotDrain”.
Temperature(InsideDrum):Higherthan60ºC/140ºF.
Ifso,waituntilitdrops.
Wheneverythingisnormal,checkPCBconnectorsandDoorLockSwitch.
• Drainmanuallyafterremovingtheplasticdrainhoseholder.
• Displayshows“LO”.Turnoandontheunit.If“LO”keepsilluminating,checkPCBandDoorLockSwitch.
TROUBLE SHOOTING
Toavoidriskofelectricalshock,personalinjuryordeath;disconnectpowertowasher
beforeservicing,unlesstestingrequirespower.
WARNING
[BIGBANG]Technical_information-03207A-03_EN.indd 15 2013-7-16 17:15:08

16
TROUBLE DIAGNOSIS
• ReadLockSwitchandPCB(CN2&CN5).(RefertoPCBConnectorCheck.)
• PerformQuickTestMode.CheckDoorLock.ChecktheoutputvoltageofDoorLockCoil.
Ifitreads120V,changeDoorLockSwitch,andifnot,changePCB.(RefertoPCBConnectorCheck.)
No Key Operation
• OptionandFunctionbuttonsresponddierentlyaccordingtoeachcycle.
• ChildLockisbeingactivated.Toexit,holddownSoilLevelKeyandSignalKeysimultaneouslyuntilitsends
outabeepingsound.
• When“End“illuminatesonthedisplay,onlyPowerbuttonworks.PressPowerbuttonandmakenewcycle
selections.
Will Not Drain
• Checkforanykinkonthedrainhose.Ifany,straightitout.
• Checkforanyrestrictioninthedrainhose.
• ClosethedoorandpresstheStart/PauseButton.Forsafetyreasons,thewasherdoesnottumbleorspinwith
thedooropen.
• Whenitisfreezingoutside,checkifitisfrozeninsidethedrainhose.
• Checkifthewaterlevelsignalinputiscorrect.GotoBoardInputTestMode.
• GotoQuickTestModeanddoDrainPumpTest.
• Checkifthereisanytwistinthehose(theonebetweenTubandDrainPump).
• CheckifitreadsAC120Vatthepumpwhenaspincycleisselected.
• Readthewindingresistanceofthepumpmotor.(14.2±7%Ohms)
• CheckthepumpatCN5(PIN4) onPCB.ItshouldreadAC110~120V.(RefertoPCBConnectorCheck)
Wrong Water Temperature
• Checkifbothofthewatertapsarefullyopen.
• Makesurethedomesticwaterheaterissettodeliverwaterlowerthan120°F(49°C)hotwateratthetap.
Alsocheckwaterheatercapacityandrecoveryrate.
• Ifthewaterheaterislocatedfarfromthewasher,screwoutthehotwatertapandletitswaterpassuntilyou
gethotwater.
• TooHot/TooCold:ReducedamountofwaterissuppliedwhilePCBcontrolstheinuxtoregulatetheactual
temperatureofthewaterinthetub.Thismayappeartobesignicantlyhotter/colderthanexpected.
• Checkifthetemperatureselectioniscorrect.
• DisconnectinlethosesfromtheWaterValveandremoveanyresidueintheinletscreens.
Noisy and/or Vibration/Walking
• Checkifthewasherisleveledandthelocknutsaretighteneduponthebottomplate.
• Checkifalloftheshippingboltsandspacersareremovedfromthebackpanel.
•
Checkifloadisbigenoughandthereisnounbalance.Ifthereisnotenoughload,putinafewtowelstobalanceit.
• Checkifthemotorisfastenedenough.
• Removevarioustroublecontributors(suchasdustcoatontheoor).
Rubber Feet Leaving Marks on Floor
• Useapencilerasertoremovemark.
• Walkwasherintolocation,donotdrag.
Additive Cups Full of Water
• Smallamountofwaterinbottomofadditivecupsisnormal.
• RemoveandwashDispenserTray,removableCup,andRinseCap.
• Levelwasher.
Buttons do not Respond
• OptionandFunctionbuttonsresponddierentlyaccordingtoeachcycle.
• ChildLockfeaturehasbeenselected.TodisablefeaturepressandholdTempandSpinsimultaneouslyuntila
beepisheard.
• Whendisplayshows“End”,onlythePowerbuttonwillfunction.PressPowerandmakenewcycleselections.
TROUBLE SHOOTING
Toavoidriskofelectricalshock,personalinjuryordeath;disconnectpowertowasher
beforeservicing,unlesstestingrequirespower.
WARNING
[BIGBANG]Technical_information-03207A-03_EN.indd 16 2013-7-16 17:15:08

17
PROBLEM CHECKING AND METHOD OF PCB
- IfyoupluginthepowercordandturnPowerS/Won,memorizeddataisdisplayed.
Ifanydataisnotdisplayed,checkthefollowings.
Thermistor Check
CheckVoltageatPin#1and#2ofCN3
TesterCheck=DC2.7V
Ifitready5V,checkifitsconnectorisengagedproperly.
Water Sensor Check
CheckVoltageandFrequencyatPin#3and#2ofCN3
Resetwaterlevel=DC2.5V,25.0KHz
CheckVoltageandFrequencyatPin#4and#2ofCN3
Resetwaterlevel=DC2.5V,25.0KHz
WF361*/WF363*
WF365*/WF364*
TROUBLE SHOOTING
Toavoidriskofelectricalshock,personalinjuryordeath;disconnectpowertowasher
beforeservicing,unlesstestingrequirespower.
WARNING
[BIGBANG]Technical_information-03207A-03_EN.indd 17 2013-7-16 17:15:09

18
Hall Sensor Check (WF364*)
CheckVoltageatPin#4and#3ofCN8
TesterCheck=DC0.6Vor1.3V
CheckVoltageatPin#4and#2ofCN8
TesterCheck=DC0.6Vor1.3V
Motor Check
ResistanceatPin#1ofCN1andR1-GND=280#or470#
ResistanceatPin#2ofCN1andR1-GND=280#or470#
ResistanceatPin#3ofCN1andR1-GND=280#or470#
Door Lock Check
CheckVoltageatPin#1ofCN2andPin#6ofCN5
WhenDoorLock=AC120V
Drain Motor Check
CheckVoltageatPin#1ofCN2andPin#4ofCN5
WhenDrainPumpoperates=AC120V
Water Valve Check
CheckVoltageatPin#1ofCN2andPin#1,2,3ofCN5
WhenDrainPumpoperates=AC120V
AC Power Check
CheckVoltageatPin#1and#3ofCN2
CheckVoltageatPin#1ofCN2andPin#1ofRY1
TesterCheck=AC120V
Heater Relay Check
CheckVoltageatPin#1ofCN2andPin#1ofRY2
WhenHeaterRelayoperates=AC120V
PROBLEM CHECKING AND METHOD OF PCB
WF364*
WF361*/WF363*/WF365*
TROUBLE SHOOTING
Toavoidriskofelectricalshock,personalinjuryordeath;disconnectpowertowasher
beforeservicing,unlesstestingrequirespower.
WARNING
[BIGBANG]Technical_information-03207A-03_EN.indd 18 2013-7-16 17:15:11

19
WF364*
WF361*/WF363*/WF365*
WATER FLOW DIAGRAM
Toavoidriskofelectricalshock,personalinjuryordeath;disconnectpowertowasher
beforeservicing,unlesstestingrequirespower.
WARNING
[BIGBANG]Technical_information-03207A-03_EN.indd 19 2013-7-16 17:15:12

20
WATER FLOW DIAGRAM
Toavoidriskofelectricalshock,personalinjuryordeath;disconnectpowertowasher
beforeservicing,unlesstestingrequirespower.
WARNING
[BIGBANG]Technical_information-03207A-03_EN.indd 20 2013-7-16 17:15:12