Samsung WA456 Series Manual

1
WASHING MACHINE
Technical Information
Code No. : DC68-03132A-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.
Models : WA456*
WA422*
WA400*
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
TECH MANUAL_DC68-03132A-03_EN.indd 1 2013-5-27 9:46:17

ALIGNMENT AND ADJUSTMENTS
2
GENERAL ERROR FUNCTION
NO
Error Code
(Diagnostic Code
Error Image)
Description Corrective Action
1
Thewaterlevelfailstodropbelow
theResetWaterLevelwithin30
minutes.
Goto“WillNotDrain”
TroubleshootingSection.
2DoorfailstoUnlockAfter7attempts. Goto“WillNotUnlock”
TroubleshootingSection.
3
(WA456*/WA422*/WA400*)
WhenthellingContinuesfor
morethan60minutesorthereisno
changeofwaterlevelfor5minutes.
Goto“NoWaterFill”
TroubleshootingSection.
4Doorfailstolockafter7attempts. Goto“WillNotLock”
TroubleshootingSection.
5
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
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
7
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.
8Unbalanceorcabinetbumpis
detectedduringnalspin
Goto“WetClothes”Troubleshooting
Section.
9Doorisdetectedasopenwhileitis
tryingtolockthedoor.
Goto“QuickTestMode”andthendo
DoorLock/UnlockTest
10
Thisoccurswhenthewater
temperaturesensorfaultisdetected
continuouslyfor5seconds.
Goto“BoardInputTest”andcheck
WaterTemperature.Checkloose
orpinchedwires.ReplacePCBor
thermistor.
Toavoidriskofelectricalshock,personalinjuryordeath;disconnectpowertowasher
beforeservicing,unlesstestingrequirespower.
WARNING
TECH MANUAL_DC68-03132A-03_EN.indd 2 2013-5-27 9:46:18

ALIGNMENT AND ADJUSTMENTS
3
NO
Error Code
(Diagnostic Code
Error Image)
Description Corrective Action
11
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)
Evaluatewireharnessforlooseor
unhookedconnections.Goto“
QuickTestMode”andtestMotor.
12 (WA422*/WA400*) Thehot/coldwaterhoseconnection
isnotcorrect.
Pleaseconnectthehot/coldwater
hoseconnectioncorrectly.
(WA456*)
13
Sudsisdetectedduringthewashing
session.(“SUd”or“Sd”isnotanerror.
Whenitnisheswashing,Endand
the“SUd”or“Sd”codewillblinkin
turn.)
Guideausertoreduceamountof
detergentusage.
14
CommunicationerrorbetweenSUB
PBAandMAINPBA
CheckMainPBA,SUBPBA&Wire-
harness.ReplacePCB
15
IftheMEMScommunicationerroror
MEMStroublediagnosiserroroccur,
thismessagewillbedisplayed.
1.ChecktheMEMSsensorandPBA.
2.Checkthewireconnector
terminals
16 AbuttonexceptthePowerbuttonis
continuallypressed.
CheckwhethereitherthePower
switchoratactswitchiscontinually
pressed
Toavoidriskofelectricalshock,personalinjuryordeath;disconnectpowertowasher
beforeservicing,unlesstestingrequirespower.
WARNING
TECH MANUAL_DC68-03132A-03_EN.indd 3 2013-5-27 9:46:20

ALIGNMENT AND ADJUSTMENTS
4
TEST MODE
Test Mode:
EachTestModeisasfollowsinthecomingpages.
Thetestmodesaremodesunabletogetan
accessoncethewashingcyclehasstarteddueto
safetyresons.
Quick Test Mode
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Spinkey,Soillevel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
WA422*/WA400*
TECH MANUAL_DC68-03132A-03_EN.indd 4 2013-5-27 9:46:20

ALIGNMENT AND ADJUSTMENTS
5
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.
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
-SoilLevelKey:DoorLock/UnlockTest
-Spin:DrainPumpTest
Toavoidriskofelectricalshock,personalinjuryordeath;disconnectpowertowasher
beforeservicing,unlesstestingrequirespower.
WARNING
.
TECH MANUAL_DC68-03132A-03_EN.indd 5 2013-5-27 9:46:21

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+SoilLevelKeytogetherfor5sec.
Continuous Run Mode:
1. Press
DelayStart+SoilLevel Keyfor5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+SoilLevelKeyfor5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DelayStartandAquaJetTM(WA456*)/ExtraRinse(WA422*/
WA400*)Keys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
TECH MANUAL_DC68-03132A-03_EN.indd 6 2013-5-27 9:46:21

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DelayStartandAquaJetTM(WA456*),ExtraRinse(WA422*/WA400*)
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.
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EcoPlus(WA456*)/PreSoak(WA422*,WA400*)
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Eco
Plus(WA456*)/PreSoak(WA422*,WA400*)Keystogetherfor3seconds.
IfyouholddowntheDelayStartandEcoPlus(WA456*)/PreSoak(WA422*,WA400*)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
TM
Delay Start and AquaJet (WA456*)/
Extra Rinse(WA422*/WA400*)
Delay Start + Eco Plus(WA456*)/
Pre Soak(WA422*,WA400*)
While it is not in Hold Speed Mode
Delay Start + Eco Plus(WA456*)/
Pre Soak(WA422*,WA400*)
3 sec
While a cycle is not running
Delay Start + Eco Plus(WA456*)/
Pre Soak(WA422*,WA400*) for 3 sec or
after 10 minutes
TECH MANUAL_DC68-03132A-03_EN.indd 7 2013-5-27 9:46:21

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PreSoakKeyduringServiceMode.
Cycle Count Check Mode:
1. ActivatetheServiceModeinadvance.
2.WhenthePreSoak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“PreSoak”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dE49atVersion49(dEisMicomcode,49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
TECH MANUAL_DC68-03132A-03_EN.indd 8 2013-5-27 9:46:22

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.
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Ecoplus(WA456*)/ExtraRinse(WA422*/WA400*)
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isturnedon,andTheWaterTemperaturewillbe
displayedinCelsius.
4.TurntheJog-DialsothatthePermPresscourseisturnedon,TheWaterTemperaturewillbe
displayedinFahrenheit.
5.TurntheJog-DialsothattheDelicates/HandWashcourseisturnedon,Thedoorstatuswillbe
displayed(OPifopen,CLifclosed).
6. TurntheJog-DialsothattheQuickWashcourseisturnedon,TheDoorLockSwitchstatuswill
bedisplayed(ULifunlocked,LOiflocked).
7. TurntheJog-DialsothatthePureCyclecourseisturnedon,TheWaterFrequencywillbe
displayed.
Toavoidriskofelectricalshock,personalinjuryordeath;disconnectpowertowasher
beforeservicing,unlesstestingrequirespower.
WARNING
Eco Plus(WA456*)/
Extra Rinse(WA422*/WA400*)
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ALIGNMENT AND ADJUSTMENTS
10
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
TECH MANUAL_DC68-03132A-03_EN.indd 10 2013-5-27 9:46:22

ALIGNMENT AND ADJUSTMENTS
11
Demo Mode
- DemomodeisenteredwhentheEcoPlus(WA456*)+PreSoak/PreSoak+ExtraRinse(WA422*/
WA400*)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,“USH”(“US”(WA422*/WA400*))
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110RPMina1.4seconand0.9sec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,“SPn”(“SP”(WA422*/WA400*))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1000RPM(WA456*)/800RPM(WA422*/WA400*).
- 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SoilLevelbuttonispressedintheinitialDemomode,“LED”(“LE”(WA422*/WA400*))blinks
onthe7segmentdisplayandthewashingmachineentersLEDmode.
- 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
Eco Plus(WA456*) + Pre Soak
Pre Soak + Extra Rinse(WA422*/WA400*)
3sec
While a cycle is not running
TECH MANUAL_DC68-03132A-03_EN.indd 11 2013-5-27 9:46:22

ALIGNMENT AND ADJUSTMENTS
12
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.
Toavoidriskofelectricalshock,personalinjuryordeath;disconnectpowertowasher
beforeservicing,unlesstestingrequirespower.
WARNING
TECH MANUAL_DC68-03132A-03_EN.indd 12 2013-5-27 9:46:22

13
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30
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.
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,HallSensorWireHarness.(CN9,CN1,CN8)
(RefertotheComponentTestingProcedure.)
• Checkmotorwindingsresistance.(CN8Pin1&3=11.6ohms(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
TECH MANUAL_DC68-03132A-03_EN.indd 13 2013-5-27 9:46:22

14
TROUBLE DIAGNOSIS
No Water Fill
• PerformQuickTestMode.CheckallofWaterValvesvisually.
(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#3ofCN6andpin#1.2.3.4ofCN4)
• 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
• PerformQuickTestMode.CheckDoorLock.
Checkthereistancefordoorlock.ifApprox0.2ohmbetweentheterminalofcontact(white-Redwire), 
andifnot,changepcb(refertopcbconnectorcheck).
• ReadLockSwitchandPCB(CN3).(RefertoPCBConnectorCheck.)
Will Not Unlock
• Displayshows“LO”.Turnoandontheunit.If“LO”keepsilluminating,checkPCBandDoorLockSwitch.
• ReadLockSwitchandPCB(CN3).(RefertoPCBConnectorCheck.)
• PerformQuickTestMode.CheckDoorLock.ChecktheresistancefordoorunlockifApprox0.2ohmbetween
theterminalofcontact(white-bluewire),andifnot,changepcb(refertopcbconnectorcheck).
TROUBLE SHOOTING
Toavoidriskofelectricalshock,personalinjuryordeath;disconnectpowertowasher
beforeservicing,unlesstestingrequirespower.
WARNING
TECH MANUAL_DC68-03132A-03_EN.indd 14 2013-5-27 9:46:23

15
TROUBLE DIAGNOSIS
No Key Operation
• OptionandFunctionbuttonsresponddierentlyaccordingtoeachcycle.
• ChildLockisbeingactivated.Toexit,holddownSpinlevelkeyandsoillevel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.(15±10%Ohms)
• CheckthepumpatPin#3ofCN6andpin#7ofCN4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.
• 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).
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
TECH MANUAL_DC68-03132A-03_EN.indd 15 2013-5-27 9:46:23

16
Hall Sensor Check
CheckVoltageatPin#4and#3ofCN9
TesterCheck=DC0.6V
CheckVoltageatPin#4and#2ofCN9
TesterCheck=DC0.6V
Motor Check
ResistanceatPin#1ofCN3andGND
=226㏀
ResistanceatPin#2ofCN3andGND
=226㏀
ResistanceatPin#3ofCN3andGND
=226㏀
Drain Motor_Pump Check
CheckVoltageatPin#3ofCN1andPin#5ofCN4
WhenDrainPumpoperates=AC120V
Water Valves/ Check
CheckVoltageatPin#3ofCN1andPin#1,2,3,4ofCN4
WhenValvesoperates=AC120V
Clutch-Motor
CheckVoltageatPin#3ofCN1andPin#8ofCN4
WhenValvesoperates=AC120V
AC Power Check
CheckVoltageatPin#1and#3ofCN1
TesterCheck=AC120V
Door Lock Check
CheckVoltageatPin#3and#5ofCN8
WhenDoorLock=DC6.5V
PROBLEM CHECKING AND METHOD OF PCB(Model : WA456*)
- 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ResistanceatPin#9and#7ofCN8
TesterCheck=47
㏀
Water Sensor Check
CheckFrequencyatPin#11and#7ofCN8
Resetfrequency=25.6KHz
CheckFrequencyatPin#12and#7ofCN8
Resetfrequency=25.6KHz
%0
*#..5'0514
%0
&QQT. QEM
%0
%0
%0
%0
/+%1/9TKVKPI
%0
219'4
4'.#;
CN8 CN12
CN7
Micom writing
TROUBLE SHOOTING
Toavoidriskofelectricalshock,personalinjuryordeath;disconnectpowertowasher
beforeservicing,unlesstestingrequirespower.
WARNING
TECH MANUAL_DC68-03132A-03_EN.indd 16 2013-5-27 9:46:23

17
Hall Sensor Check
CheckVoltageatPin#4and#3ofCN9
TesterCheck=DC0.6V
CheckVoltageatPin#4and#2ofCN9
TesterCheck=DC0.6V
Motor Check
ResistanceatPin#1ofCN3andGND
=226㏀
ResistanceatPin#2ofCN3andGND
=226㏀
ResistanceatPin#3ofCN3andGND
=226㏀
Drain Motor_Pump Check
CheckVoltageatPin#3ofCN1andPin#5ofCN4
WhenDrainPumpoperates=AC120V
Water Valves/ Check
CheckVoltageatPin#3ofCN1andPin#1,2,3,4ofCN4
WhenValvesoperates=AC120V
Clutch-Motor
CheckVoltageatPin#3ofCN1andPin#8ofCN4
WhenValvesoperates=AC120V
AC Power Check
CheckVoltageatPin#1and#3ofCN1
TesterCheck=AC120V
Door Lock Check
CheckVoltageatPin#3and#5ofCN8
WhenDoorLock=DC6.5V
PROBLEM CHECKING AND METHOD OF PCB(Model : WA422*/WA400*)
- 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ResistanceatPin#9and#7ofCN8
TesterCheck=47
㏀
Water Sensor Check
CheckFrequencyatPin#11and#7ofCN8
Resetfrequency=25.6KHz
CheckFrequencyatPin#12and#7ofCN8
Resetfrequency=25.6KHz
TROUBLE SHOOTING
Toavoidriskofelectricalshock,personalinjuryordeath;disconnectpowertowasher
beforeservicing,unlesstestingrequirespower.
WARNING
%0
*#..5'0514
%0
&QQT. QEM
%0
%0
%0
%0
/+%1/9TKVKPI
%0
219'4
4'.#;
TECH MANUAL_DC68-03132A-03_EN.indd 17 2013-5-27 9:46:24

18
Model : WA456*/WA422*/WA400*
WIRING DIAGRAM
Toavoidriskofelectricalshock,personalinjuryordeath;disconnectpowertowasher
beforeservicing,unlesstestingrequirespower.
WARNING
TECH MANUAL_DC68-03132A-03_EN.indd 18 2013-5-27 9:46:24

19
Model : WA456*
Model : WA422*/WA400*
C
O
L
D
H
O
T
B
L
A
C
K
W
H
I
T
E
B
L
U
E
R
E
D
MIST
C
O
L
D
H
O
T
B
L
A
C
K
W
H
I
T
E
R
E
D
BLEACH
B
L
U
E
MIST
B
L
U
E
WATER FLOW DIAGRAM
Toavoidriskofelectricalshock,personalinjuryordeath;disconnectpowertowasher
beforeservicing,unlesstestingrequirespower.
WARNING
TECH MANUAL_DC68-03132A-03_EN.indd 19 2013-5-27 9:46:25

TECH MANUAL_DC68-03132A-03_EN.indd 20 2013-5-27 9:46:25