WGD9500TW2 Tech Sheet - W10198663 - Rev B

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WGD9500TW2 Tech Sheet - W10198663 - Rev B.pdf
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  TECHSHEET-DONOTDISCARD PAGE1W10198663B.ONTR AP Y LNOESUS’N AICINHCETECIVRESROF WARNING Electrical Shock HazardDisconnect power beforeservicing.Replace all parts andpanels before operating.Failure to do so canresult in death orelectrical shock. IMPORTANT Electrostatic Discharge SensitiveElectronics (ESD) ESD problems are present everywhere. ESDmay damage or weaken the machine controlelectronics. The new control assembly mayappear to work well after repair is finished, butfailure may occur at a later date due to ESDstress.Use an anti-static wrist strap. Connectwrist strap to green ground connection pointor unpainted metal in the appliance -OR-Touch your finger repeatedly to a greenground connection point or unpainted metalin the appliance.Before removing the part from its package, touch the anti-static bag to a green groundconnection point or unpainted metal in theappliance.Avoid touching electronic parts or terminalcontacts; handle machine controlelectronics by edges only.When repackaging failed machine controlelectronics in anti-static bag, observe aboveinstructions. DIAGNOSTIC GUIDE Before servicing, check the following:Make sure there is power at the wall outlet.Has a household fuse blown or circuit breaker  tripped? Was a regular fuse used? Use a time-delay fuse.Is dryer vent properly installed and clear of lintor obstructions?All tests/checks should be made with a VOM(volt-ohm-milliammeter) or DVM (digital-voltmeter) having a sensitivity of 20,000 Ω per volt DC or greater.Check all connections before replacingcomponents. Look for broken or loose wires,failed terminals, or wires not pressed intoconnectors far enough.A potential cause of a control not functioningis corrosion on connections. Observeconnections and check for continuity withan ohmmeter.Connectors: Look at top of connector. Check for broken or loose wires. Check for wires notpressed into connector far enough to engagemetal barbs.Resistance checks must be made with dryer unplugged or power disconnected. DIAGNOSTIC TESTS These tests allow service personnel to test andverify all inputs to the machine control electronics. You may want to do a quick and overall checkupof the dryer with these tests before going tospecific troubleshooting tests. ACTIVATING THE DIAGNOSTICTEST MODE 1.  Be sure the dryer is in standby mode (pluggedin with all indicators off, or with only the Doneindicator on). 2.  Select any one button (except Pause/Canceland Controls Lock/Unlock) and follow the stepsbelow, using the same button (remember thebutton): Press/ hold 2secondsReleasefor 2secondsPress/ hold 2secondsReleasefor 2secondsPress/ hold 2seconds 3.  If this test mode has been entered successfully,all indicators on the console are illuminated for 5 seconds with  8  : 88   showing in the EstimatedTime Remaining three-digit display. If there areno saved fault codes or active fault codes, allindicators on the console will momentarily turnoff, then stay on with  8  : 88   displayed. Continuewith diagnostics. 4.  If entry into Diagnostic Test Mode isunsuccessful, choose a different button (exceptPause/Cancel and Controls Lock/Unlock) andrepeat step 2.If no indicators come on after repeating step2 using a different button, go to TEST #1,page 4. DIAGNOSTIC: Active Fault Codes If there is an active fault code, it will be flashing in the display. Review the Display Fault/Error Codes table, page 3, for the recommended procedure.If there is no active fault code,  8  : 88   will bedisplayed and all of the indicator lights will be turned on. DIAGNOSTIC: Saved Fault Codes If there are saved fault codes, the most recentfault code will show “F:” and flash “XX” where XX is the fault code. Press and release the same buttonused to activatediagnosticsbeep toneSecond most recentfault code isdisplayed.Repeat beep toneThird most recent faultcode is displayed.Repeat beep toneFourth most recentfault code isdisplayed.Repeat All indicators momentarily turnoff, then stay on. DIAGNOSTIC: Console Buttons andIndicators Pressing buttons and rotating the cycle selector will turn off the corresponding indicator and sounda beep as shown in figure 1, page 2.Pressing (more time) will toggle theleft digit and colon on the display whilesounding a beep.Pressing (less time) will toggle theright two digits on the display whilesounding a beep.Electric Models Only: Pressing the WrinkleShield button will activate the Inlet Air FlowTest. See DIAGNOSTIC: Displaying Inlet Air Flow, page 2.Pressing the Cycle Signal button willactivate the Line Voltage Test. SeeDIAGNOSTIC: Displaying Line Voltage,page 2.If indicators fail to come on and beep after pressing buttons and rotating the cycleselector, go to TEST #6, page 8. DIAGNOSTIC: Door Switch Opening the door should cause a beep and analphanumeric number (such as ) to bedisplayed. Closing the door should cause a beepand  8  : 88   to be displayed.If opening the door fails to cause a beep anda number and letter to be displayed, go toTEST #7, page 9. NOTE:  Opening the door while in Diagnostic TestMode may not activate the drum light. The lightwill come on when Start is pressed, or uponopening the door after the Diagnostic Test Modehas been canceled. DIAGNOSTIC: Moisture Sensor 1.  Open the door and locate two metal strips on the inside of the dryer. Using a wet cloth or onefinger, jointly touch both strips.If a continuous beep tone is heard and analphanumeric number is displayed on theconsole, the sensor is OK.If a continuous beep tone is not heard, or if a continuous beep tone is heard before touching both moisture strips, go to step 2. 2.  Check to see if there is water in the dryer around the moisture strips.If no water is present, go to TEST #5,page 8.If water is present, wipe the strips offwith a dry cloth and repeat step 1.If wiping the strips does not stop thebeeping, run a timed dry cycle for 2 minutes to dry out the drum, then repeat thisdiagnostic test. P   :  3  E   W10198663B.ONTR AP Y LNOESUS’N AICINHCETECIVRESROF TECHSHEET-DONOTDISCARD PAGE2 B   u    t    to   n Rotating this CycleSelector turns cycleLEDs on or off.Start button controls its own indicator,starts dryer, and displays version information.Power button controlsits own indicator andCycle Status LEDs.Controls Lock/Unlock buttoncontrols LED below button.Turns off allLEDs and exitsdiagnostics.Drum Light buttoncontrols LEDbelow button.“Less Time” button turns the middle andright digit of thedisplay on or off.“More Time” button turns the left digitand colon of thedisplay on or off.Wrinkle Shield buttoncontrols its own indicator and starts InletAir Flow Diagnostic.Button Sound buttoncontrols all LEDsabove button(Green-Amber-Off).Cycle Signal buttoncontrols all LEDs above button(Green-Amber-Off) and startsdisplaying Line Voltage Diagnostic.Each buttoncontrols all LEDsabove button(Green-Amber-Off).   Figure 1.  Console Diagnostics. DIAGNOSTIC: Motor, Heater, Water,Drum Light, and Console ID Close the door. Press the Start button. The motor,heater, drum light, and water valve will turn on.Continuing to press the Start button will display the project codes and software revisions. Thesecodes are not relevant to the service of thedryer and can be ignored. NOTE:  The console buttons only control theindicator lights in Diagnostic Test Mode. When thebuttons are pressed, the corresponding featureswill not be activated.If the motor does not turn on, go to TEST #3,page 5.If no heat is detected, go to TEST #4, page 6.If no water is detected, go to TEST #8, page 9. NOTE:  Press Pause/Cancel when the test iscomplete to turn off the dryer. If the dryer isleft running in Diagnostic Test Mode, water will build up in the drum. DIAGNOSTIC: Displaying Inlet Air Flow(Electric Models Only) Used to display the air flow value at the inlet of theheater box being measured by the machine control.After entering the Diagnostic Test Mode, waitingfor the 5 second delay, and cycling through anysaved fault codes, press the Wrinkle Shield button to activate air flow detection. A 30 or 50 secondcountdown timer will start and the dryer will turn on.If the dryer is cold, the countdown will start at50 seconds. NOTE:  If the dryer is extremely cold (less than40°F [4.4°C]), the air flow may not be detectedproperly, and “--” will be displayed.If the dryer is hot, the countdown timer will start at 30 seconds (cool down period),followed by an additional 50 second countdown.A Dryness Level modifier LED will also beilluminated to indicate the air flow rangecorresponding to the number displayed.The More LED will be illuminated for air flowreadings above 40 cfm.The Normal LED will be illuminated for air flowreadings between 29 and 40 cfm.The Less LED will be illuminated for air flowreadings less than 29 cfm.If air flow value is low (Less LED is lit),check to make sure the lint screen is clean, the door seal is in place, and the vent is notobstructed. DIAGNOSTIC: Displaying Line Voltage Used to display the line voltage currently beingmeasured by the machine control:After entering the Diagnostic Test Mode, waitingfor the 5 second delay, and cycling through anysaved fault codes, press the Cycle Signal button.The voltage value will be displayed.If the line voltage is not seen on L2, the displaywill flash  2  . Go to TEST #1, page 4. DEACTIVATING THE DIAGNOSTICTEST MODE Press the Pause/Cancel button to exit diagnostics. ACTIVATING THE MANUAL LOAD TEST 1.  Be sure the dryer is in standby mode (pluggedin with all indicators off, or with only the Doneindicator on). 2.  Select any one button (except Pause/Canceland Controls Lock/Unlock) and follow the stepsbelow, using the same button (remember thebutton): a.  Press/hold 2 seconds b.  Release for 2 seconds c.  Press/hold 2 seconds d.  Release for 2 seconds e.  Press/hold 2 seconds f.  Release for 2 seconds g.  Press/hold 2 secondsThe motor starts right away, the “Steam”Status LED comes on, and “0” (zero) isdisplayed (this step starts the Manual Loadsequence): 1. Motor turnson.“Steam” StatusLED turns on.0:00 isdisplayed. Now press any key (except Pause/Cancel andControls Lock/Unlock) and the control willadvance through each step of the followingsequence: 2. Motor + heater. “Wet” StatusLED turns on.0:01 isdisplayed.3. Motor + heater + water valve.“Damp”Status LED turns on.0:02 isdisplayed.4.Motor + heater + water valve+ drum light.“Cool Down”Status LED turns on.0:03 isdisplayed.5. All loads turnoff.“Done” StatusLED turns on.0:04 isdisplayed. DEACTIVATING THE MANUALLOAD TEST Press the Pause/Cancel button to exit this mode. L  TECHSHEET-DONOTDISCARD PAGE3W10198663B.ONTR AP Y LNOESUS’N AICINHCETECIVRESROF DISPLAY FAULT/ERROR CODES The fault codes below would be indicated when attempting to starta drying cycle, or after activating the Diagnostic Test Mode. Display Description Explanation / Recommended Procedure PF   PowerFailurePF  flashes to indicate that a power failureoccurred while the dryer was running.Press Start to continue the cycle, or press Pause/Cancel to clear the display.  2   Low LineVoltageL2  flashes if low line voltage (less than30 V) is detected at installation.Check to see if a household fuse hasblown or a circuit breaker has tripped.Confirm the power cord is properlyinstalled and plugged into the power outlet.Check the relay connections on themachine control electronics.Gas Models Only: Check the P14connection on the machine controlelectronics. AF   Low Air FlowConditionAF  flashes if low inlet air flow is detectedat install.Check to see if the vent run from thedryer to the wall is crushed.Perform steps under DIAGNOSTIC:Displaying Inlet Air Flow, page 2.  : 01   Primary ControlFailureF:01  flashes when there is a primarycontrol failure.Replace the machine control electronics.See Accessing & Removing theElectronic Assemblies, page 9. Keypad/ User InterfaceFailureF:02  flashes when there is a stuck buttonor user interface mismatch. This fault codeappears ONLY when in the Diagnostic TestMode.See TEST #6, page 8. Heater FailureF:20  flashes if no voltage is detected at theheater relay. This fault code appears ONLY when in the Diagnostic Test Mode.Check that the wires are plugged in on the heater element and at the relay on the electronic control. OutletThermistorOpenF:22  flashes if the outlet thermistor is open.See TEST #4a, page 7. OutletThermistorShortedF:23  flashes if the outlet thermistor hasshorted.See TEST #4a, page 7. InletThermistorOpenF:24  flashes if the inlet thermistor is open.This fault code appears ONLY when in theDiagnostic Test Mode.See TEST #4a, page 7. InletThermistorShortedF:25  flashes if the inlet thermistor isshorted. This fault code appears ONLY when in the Diagnostic Test Mode.See TEST #4a, page 7. Motor DriveSystem FailureF:26  flashes if there is a motor drivesystem failure.See TEST #3, page 5. MoistureSensor OpenF:28  flashes if the moisture sensor strip isopen. This fault code appears ONLY whenin the Diagnostic Test Mode.See TEST #5, page 8. MoistureSensorShortedF:29  flashes if the moisture sensor striphas shorted. This fault code appears ONLY when in the Diagnostic Test Mode.See TEST #5, page 8. Moisture Sensor Strips Heater AssemblyDoor SwitchSee Accessing & Removing the ElectronicAssemblies, page 9, to access:See Removing the Toe Panel,page 9, to access:Machine Control ElectronicsConsole Electronics and HousingMoisture SensorsOutlet Thermistor Thermal Cut-offInlet Thermistor/High LimitThermostat Assembly (Electric Models)High Limit Thermostat (Gas Models)Heater Assembly (Electric or Gas)Thermal FuseSee Removing the Back Panel, page 11, to access:Drum Light AssemblyWater NozzleBlower Motor AssemblyWater Valve Figure 2.  Component locations. Display Description Explanation / Recommended Procedure RestrictedAir FlowConditionF:30  flashes if a restricted air flow condition exists. This faultcode appears ONLY when in the Diagnostic Test Mode.Check to make sure the lint screen is clean, the door sealis in place, and the vent is not obstructed.See DIAGNOSTIC: Displaying Inlet Air Flow, page 2. L2 Line VoltageErrorF:31  flashes if a low voltage condition (less than 30 V) hasbeen detected. This fault code appears ONLY when in theDiagnostic Test Mode.Check to see if a household fuse has blown or a circuitbreaker has tripped.Confirm the power cord is properly installed and pluggedinto the power outlet.Check the relay connections on the electronic control. Water ValveFailureF:50  flashes if no voltage is detected at the water valve relay.This fault code appears ONLY when in the Diagnostic TestMode.Check that the wires are plugged in on the valve and at therelay on the electronic control. NoCommunicationBetweenElectronicAssembliesF:70  /   F:71  flashes when there is no communication between the machine control and the console electronics.Check console electronics harness connections to themachine control.Replace the machine control electronics. See Accessing &Removing the Electronic Assemblies, page 9. through ConsoleElectronicsFailureF:72  through  F:78  flashes when there is a console electronicsfailure.Replace the console electronics. See Accessing &Removing the Electronic Assemblies, page 9. L F   : 02  F   : 20  F   : 22  F   : 23  F   : 24 F   : 25  F   : 26  F   : 28  F   : 29  F   : 30  F   : 31  F   : 50  F   :70  F   :71  F   :72  F   :78  F   W10198663B.ONTR AP Y LNOESUS’N AICINHCETECIVRESROF TECHSHEET-DONOTDISCARD PAGE4 TROUBLESHOOTING TESTS NOTE:  These checks are done with the dryer unplugged or disconnected from power. TEST #1  Supply Connections This test assumes that proper voltage is present at the outlet, and visual inspection indicates that thepower cord is securely fastened to the terminalblock (electric dryer) or wire harness connection(gas dryer). ELECTRIC DRYER: 1.  Unplug dryer or disconnect power. 2.  Remove the cover plate from the top rightcorner of the back of the dryer. See figure 3. 3.  With an ohmmeter, check for continuitybetween the neutral (N) terminal of the plugand the center contact on the terminal block.See figure 4.If there is no continuity, replace the power cord and test the dryer.If there is continuity, go to step 4. 4.  In a similar way, check which terminal of theplug is connected to the left-most contact on the terminal block and make a note of it. Thiswill be L1 (black wire) in the wiring diagram.See figure 4.When this is found, go to step 5.If neither of the plug terminals havecontinuity with the left-most contact of the terminal block, replace the power cord and test the dryer. 5.  Access the machine control electronics withoutdisconnecting any wiring to the control board.See Accessing & Removing the ElectronicAssemblies, page 9. 6.  With an ohmmeter, check for continuitybetween the L1 terminal of the plug (found instep 4) and P9-2 (black wire) on the machinecontrol board. See figure 18, page 10.If there is continuity, go to step 7.If there is no continuity, check that wires to the terminal block are mechanically secure.If so, replace the main wire harness and test the dryer. 7.  Check for continuity between the neutral (N) terminal of the plug and P8-3 (white wire) on the machine control board.If there is continuity, go to step 8.If there is no continuity and the mechanicalconnections of the wire are secure, replace the main wire harness. 8.  Visually check that the P5 connector isinserted all the way into the machine controlelectronics. 9.  Visually check that the console electronics andhousing assembly is properly inserted into thefront console. 10.  If both visual checks pass, replace theconsole electronics and housing assembly. 11.  Plug in dryer or reconnect power. 12.  Perform steps under DIAGNOSTIC: ConsoleButtons and Indicators, page 1, to verifyrepair. 13.  If indicators still do not light, performTEST #2, page 5. GAS DRYER: 1.  Unplug dryer or disconnect power. 2.  Remove the cover plate from the top rightcorner of the back of the dryer. See figure 3. 3.  Check that the power cord is firmly connected to the dryer’s wire harness. See figure 5. 4.  Access the machine control electronics withoutdisconnecting any wiring to the control board.See figure 17, page 10. 5.  With an ohmmeter, check for continuitybetween the neutral (N) terminal of the plugand P8-3 (white wire) on the machine controlboard. The left-hand side of figure 6 shows theposition of the neutral terminal (N) on thepower cord plug. Also see figure 18, page 10.If there is continuity, go to step 6. Problem  Possible Cause / Test NOTE:  Possible Cause/Tests MUST be performedin the sequence shown for each problem. Won’t power up. (No response when buttons are pressed.) 1. Supply connections. See TEST #1, at right.2. Check harness connections.3. Console electronics and housing assembly.See TEST #6, page 8. Won’t start cycle when Start button is pressed. 1. If number display flashes, check to be sure thedoor is completely shut, and press and holddown Start for about 1 second.2. See TEST #3, page 5.3. See TEST #7, page 9. Won’t shut off when expected. 1. Check Pause/Cancel button.2. Console electronics and housing assembly.See TEST #6, page 8.3. Moisture sensor. See TEST #5, page 8. Control won’t accept selections. Console electronics and housing assembly.See TEST #6, page 8. Won’t heat. 1. Heater. See TEST #4, page 6.2. Check harness connections.3. See DIAGNOSTIC: Displaying Line Voltage,page 2.4. Check installation. Heats in air cycle. Heater. See TEST #4, page 6. Shuts off before clothes are dry. 1. Check the dryness setting for auto cycles.2. Check for full lint screen.3. See DIAGNOSTIC: Displaying Inlet Air Flow,page 2.4. Check for clogged vent.5. Moisture sensor. See TEST #5, page 8.6. Dryness level adjust. See TEST #5a, page 8. Pushing Power button causes dryer to beep,but no indicators light. 1. Check console electronics harness connections to the machine control.2. Replace machine control electronics. SeeAccessing & Removing the ElectronicAssemblies, page 9. Water not dispensing. 1. Make sure a “Steam” cycle (either Quick Refreshor Enhanced Touch Up) is selected.2. See TEST #8, page 9. TROUBLESHOOTING GUIDE Some tests will require accessing components.See figure 2, page 3, for component locations. WireHarnessPower Cord Figure 5.  Power cord-to-wire harnessconnection for gas dryer. RemoveScrewCover Plate Figure 3.  Remove the cover plate. COM N L1 Power CordPlug Terminal Block  Figure 4.  Plug-to-terminal connections for electric dryer.
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