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TECH SHEET - DO NOT DISCARD PAGE 1

W10258368B.ONTRAPYLNOESUS’NAICINHCETECIVRESROF

WARNINGElectrical Shock Hazard

Disconnect 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,but failure may occur at a later date due toESD stress.

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 GUIDEBefore servicing, check the following:

Make sure there is power at the wall outlet.

Has a household fuse blown or circuit breakertripped? Was a regular fuse used? Use atime-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 Ωper 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. Checkfor broken or loose wires. Check for wires not

pressed into connector far enough to engagemetal barbs.

Resistance checks must be made with dryerunplugged or power disconnected.

DIAGNOSTIC TESTSThese 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 MODE1. Be sure the dryer is in standby mode (plugged

in 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 2

seconds

Releasefor 2

seconds

Press/hold 2

seconds

Releasefor 2

seconds

Press/hold 2

seconds

3. If this test mode has been entered successfully,all indicators on the console are illuminated for5 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 CodesIf there is an active fault code, it will be flashing inthe display. Review the Display Fault/Error Codestable, page 3, for the recommended procedure.

If there is no active fault code, 8:88 will bedisplayed and all of the indicator lights will beturned on.

DIAGNOSTIC: Saved Fault CodesIf there are saved fault codes, the most recentfault code will show “F:” and flash “XX” where XXis the fault code.

Press and releasethe same buttonused to activatediagnostics

beeptone

Second most recentfault code isdisplayed.

Repeat beeptone

Third most recent faultcode is displayed.

Repeat beeptone

Fourth most recentfault code isdisplayed.

Repeat All indicators momentarily turnoff, then stay on.

DIAGNOSTIC: Console Buttons andIndicatorsPressing buttons and rotating the cycle selectorwill 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.

Pressing the Cycle Signal button willactivate the Line Voltage Test. SeeDIAGNOSTIC: Displaying Line Voltage,page 2.

If indicators fail to come on and beep afterpressing buttons and rotating the cycleselector, go to TEST #6, page 8.

DIAGNOSTIC: Door SwitchOpening 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 Sensor1. 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, orif a continuous beep tone is heard beforetouching both moisture strips, go to step 2.

2. Check to see if there is water in the dryeraround 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 minutesto dry out the drum, then repeat thisdiagnostic test.

P E:3



Rotating this CycleSelector turns cycle

LEDs 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 exits

diagnostics.

Drum Light buttoncontrols LEDbelow button.

“Less Time” buttonturns the middle and

right digit of thedisplay on or off.

“More Time” buttonturns the left digitand colon of thedisplay on or off.

Wrinkle Shield buttoncontrols its own indicator.

Button Sound buttoncontrols all LEDs

above button(Green-Amber-Off).

Cycle Signal buttoncontrols all LEDs above

button (Green-Amber-Off)and starts displaying

Line Voltage Diagnostic.

Each buttoncontrols all LEDs

above button(Green-Amber-Off).

Figure 1. Console Diagnostics.

DIAGNOSTIC: Motor, Heater, Water,Drum Light, and Console IDClose the door. Press the Start button. The motor,heater, drum light, and water valve (steam modelsonly) will turn on. Continuing to press the Startbutton will display the project codes and softwarerevisions. These codes are not relevant to theservice of the dryer 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 dryeris left running in Diagnostic Test Mode, waterwill build up in the drum.

DIAGNOSTIC: Displaying Line VoltageUsed 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 MODEPress the Pause/Cancel button to exit diagnostics.

ACTIVATING THE MANUAL LOAD TEST1. Be sure the dryer is in standby mode (plugged

in 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 secondsb. Release for 2 secondsc. Press/hold 2 secondsd. Release for 2 secondse. Press/hold 2 secondsf. Release for 2 secondsg. Press/hold 2 seconds

The 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 LEDturns on.

0:02 isdisplayed.

4.Motor + heater+ water valve+ drum light.

“Cool Down”Status LEDturns on.

0:03 isdisplayed.

5. All loads turnoff.

“Done” StatusLED turns on.

0:04 isdisplayed.

DEACTIVATING THE MANUALLOAD TESTPress the Pause/Cancel button to exit this mode.

L

Steam Models Only: Steam Models Only:

The motor starts right away, the “Sensing”Status LED comes on, and “0” (zero) isdisplayed (this step starts the Manual Loadsequence):

1. Motor turnson.

“Sensing” 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. “Damp” StatusLED turns on.

0:02 isdisplayed.

3. Motor + heater+ drum light.

“Cool Down”Status LEDturns on.

0:03 isdisplayed.

4. All loads turnoff.

“Done” StatusLED turns on.

0:04 isdisplayed.

Non-Steam Models Only:



DISPLAY FAULT/ERROR CODESThe fault codes below would be indicated when attempting to starta drying cycle, or after activating the Diagnostic Test Mode.

Display Description Explanation / Recommended Procedure

PowerFailure

PF flashes to indicate that a power failureoccurred while the dryer was running.

Press Start to continue the cycle, orpress Pause/Cancel to clear the display.

Low LineVoltage

L2 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 properly installedand plugged into the power outlet.Check the relay connections on themachine control electronics.Gas Models Only: Check the P14connection on the machine controlelectronics.

Primary ControlFailure

F:01 flashes when there is a primarycontrol failure.

Replace the machine control electronics.See Accessing & Removing theElectronic Assemblies, page 9.

Keypad/User Interface

Failure

F: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 Failure

F:20 flashes if no voltage is detected at theheater relay. This fault code appears ONLYwhen in the Diagnostic Test Mode.

Check that the wires are plugged in onthe heater element and at the relay on theelectronic control.

OutletThermistor

Open

F:22 flashes if the outlet thermistor is open.See TEST #4a, page 7.

OutletThermistor

Shorted

F:23 flashes if the outlet thermistor hasshorted.

See TEST #4a, page 7.

Motor DriveSystem Failure

F:26 flashes if there is a motor drivesystem failure.


MoistureSensor Open

F:28 flashes if the moisture sensor strip isopen. This fault code appears ONLY whenin the Diagnostic Test Mode.


MoistureSensorShorted

F:29 flashes if the moisture sensor striphas shorted. This fault code appears ONLYwhen in the Diagnostic Test Mode.


Moisture SensorStrips

HeaterAssembly

DoorSwitch

See Accessing & Removing the ElectronicAssemblies, page 9, to access:

See Removingthe Toe Panel,page 9, to access:

Machine Control ElectronicsConsole Electronics and Housing

Moisture SensorsOutlet ThermistorThermal Cut-offHigh Limit ThermostatHeater Assembly (Electric or Gas)Thermal Fuse

See Removing the BackPanel, page 11, to access:

Drum Light AssemblyWater NozzleBlower Motor AssemblyWater Valve

Figure 2. Component locations.

Display Description Explanation / Recommended Procedure

L2 Line VoltageError

F: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 ValveFailure

F: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.

NoCommunication

BetweenElectronic

Assemblies

F:70 / F:71 flashes when there is no communication betweenthe machine control and the console electronics.

Check the harness connections at the machine controland at the console electronics.Replace the machine control electronics. See Accessing &Removing the Electronic Assemblies, page 9.

throughConsole

ElectronicsFailure

F:72 through F:78 flashes when there is a console electronicsfailure.

Replace the console electronics. See Accessing &Removing the Electronic Assemblies, page 9.

PF

L

F:0 1

F:02

F:20

F:22

F:23

F:26

F:28

F:29

F:31

F:72

F:78

2

:50F

:70F

:71F



TROUBLESHOOTING TESTSNOTE: These checks are done with the dryerunplugged or disconnected from power.

TEST #1 Supply ConnectionsThis test assumes that proper voltage is present atthe 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 powercord 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 onthe 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 theterminal block, replace the power cord andtest 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 no continuity, check that wires tothe terminal block are mechanically secure.If so, replace the main wire harness and testthe dryer.

7. Check for continuity between the neutral (N)terminal of the plug and P8-3 (white wire) onthe machine control board.


If there is no continuity and the mechanicalconnections of the wire are secure, replacethe main wire harness.

8. Visually check that the P2 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:


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 connectedto 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.


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.


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. SeeTEST #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. Check for clogged vent.4. Moisture sensor. See TEST #5, page 8.5. Dryness level adjust. See TEST #5a, page 8.

Pushing Power button causes dryer to beep,but no indicators light.

1. Check console electronics harness connectionsto 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 GUIDESome tests will require accessing components.See figure 2, page 3, for component locations.

Figure 5. Power cord-to-wire harnessconnection for gas dryer.

Figure 3. Remove the cover plate.

COM

N L1

Figure 4. Plug-to-terminal connections forelectric dryer.

RemoveScrew

Cover Plate

Power CordPlug

Terminal Block

WireHarness

Power Cord

Steam Models Only:



If there is no continuity, disconnect the whitewire of the harness from the power cord atthe location illustrated in figure 5, page 4.Test the continuity of the power cord neutralwire as illustrated in figure 6. If an opencircuit is found, replace the power cord.Otherwise, go to step 6.

6. In a similar way, check the continuity betweenthe L1 terminal of the plug and P9-2 (blackwire) on the control board.


If there is no continuity, check the continuityof the power cord in a similar way to thatillustrated in figure 6, but for power cord’sL1 wire.

If an open circuit is found, replace the powercord. Otherwise, replace the main harness.

7. Visually check that the P2 connector isinserted all the way into the machine controlelectronics.


9. If both visual checks pass, replace the consoleelectronics and housing assembly.


11. Perform steps under DIAGNOSTIC: ConsoleButtons and Indicators, page 1, to verify repair.

12. If indicators still do not light, performTEST #2.

TEST #2 Machine Control PowerCheckThis test is used to determine if power is presentat the machine control electronics. This testassumes that TEST #1 has been completed.

NOTE: The drum light is controlled by the machinecontrol on all models.


2. Open the door.

If the drum light illuminates, then power ispresent at the machine control. Go tostep 3.

If the drum light fails to illuminate, theproblem may be as simple as a bad bulb.Replace bulb with a working bulb. If drumlight still fails to illuminate, continue withstep 3.


4. Replace the machine control electronics.



TEST #3 Motor CircuitThis test will check the wiring to the motor and themotor itself. The following items are part of thismotor system:

Part of Motor System ElectricDryer

GasDryer

Harness/connection

Thermal fuse noBelt/belt switch

Drive motor

Centrifugal switch

Door switch

Machine control electronics. SeeESD information, page 1.


2. Access the machine control electronics andmeasure the resistance across P8-4 and P9-1.See Accessing & Removing the ElectronicAssemblies, page 9.

If resistance across P8-4 and P9-1 is in therange of 1 to 6 Ω, replace the machinecontrol electronics.

Otherwise, go to step 3.

3. Check the wiring and components in the pathbetween these measurement points byreferring to the appropriate wiring diagram(gas or electric) on page 12.

ELECTRIC DRYER ONLY: Check the thermalfuse. See TEST #4b, page 7.

ALL DRYERS: Continue with step 4 below totest the remaining components in the motorcircuit.

4. Check the belt switch and drive motor. Accessthe belt switch and drive motor by removingthe back panel. See Removing the Back Panel,page 11. Slowly remove the drum belt from thespring-loaded belt switch pulley, gently lettingthe belt switch pulley down. See figure 7.

5. Remove the white connector from the drivemotor switch. See figure 8.

6. Remove the bare copper wire terminal frompin 5 of black drive motor switch. See figure 9.

7. Using figure 9, check for the resistance valuesof the motor’s Main and Start winding coils asshown in the following table.

NOTE: Main and Start winding coils must bechecked at the motor.

Winding Resistance Contact Pointsof Measurement

MAIN 3.3–3.6

Lt. blue wire in back atpin 4 and bare copper wireterminal removed from pin 5of black drive motor switch

START 2.7–3.0

Lt. blue wire in back atpin 4 and bare copper wireterminal on pin 3 of black

drive motor switch

If the resistance at the motor is correct,there is an open circuit between the motorand machine control electronics. Checkfor failed belt switch.

If the Start winding resistance is muchgreater than 3 Ω, replace the motor.

8. Check the belt switch by measuring resistancebetween the two light blue wires, as shown infigure 10, page 6, while pushing up the beltswitch pulley.

Main Winding:Lt.and Bare Copper Wire

Blue Wire in Back

StartWinding:

Lt.and

Bare CopperWire

Blue Wirein Back 1

53

46

2

Figure 9. Main and start winding measurepoints.

COM

G

L1

L1

Power CordPlug

N

N

G

Figure 6. Power cord terminals, gas dryer.

DrumBelt

Belt Switch Pulley

Figure 7. Slowly remove drum belt.

WhiteConnector

Drive MotorSwitch

15

34

62

Figure 8. Remove white connector.



If the resistance reading goes from infinityto a few ohms as pulley arm closes theswitch, belt switch is OK. If not, replace thebelt switch.

If belt switch is OK and there is still an opencircuit, check and repair the wiring harness.

9. Door Switch problems can be uncovered byfollowing procedure under DIAGNOSTIC: DoorSwitch, page 1; however, if this was not done,the following can be done without applyingpower to the dryer. Connect an ohmmeteracross P8-3 (neutral, white wire) and P8-4(door, tan wire).

With the door properly closed, theohmmeter should indicate a closed circuit(0–2 Ω).

If not, replace the door switch assembly.

TEST #4 HeaterThis test is performed when either of the followingsituations occur:

Dryer does not heat

Heat will not shut off

This test checks the components making up theheating circuit. The following items are part of thissystem:

Part of Heating System ElectricDryer

GasDryer

Harness/connection

Heater relay

Thermal cut-off

Thermal fuse noHigh limit thermostat

Heat element assembly noGas burner assembly noCentrifugal switch

Outlet thermistor

Machine control electronics.See ESD information, page 1.

Console electronics and housingassembly

Gas supply no

Dryer does not heat:Locate the components using figure 11.

ELECTRIC DRYER:


2. Remove the toe panel to access the thermalcomponents. See Removing the Toe Panel,page 9.

3. Using an ohmmeter and referring to the wiringdiagram, measure the resistance from the redwire terminal at the thermal cut-off to the redwire terminal at the heater.

If the resistance is about 10 Ω, go to step 5.

If an open circuit is detected, go to step 4.

4. Visually check the wire connections to thethermal cut-off, high limit thermostat, andheater. If connections look good, check forcontinuity across each of these components.

Replace the heater if it is electrically open.

Replace both the thermal cut-off andhigh limit thermostat if either the thermalcut-off or the high limit thermostat iselectrically open.

5. If no open circuit is detected, remove theP14 connector, then measure the resistancebetween P14-3 (red wire) and P14-6 (red wire)at the connector. See figure 18, page 10, forconnector location; and Accessing & Removingthe Electronic Assemblies, page 9.

If 5–15 kΩ are measured, replace themachine control electronics.

If the resistance is less than 1 kΩ, replacethe outlet thermistor.

GAS DRYER:


2. Remove the toe panel to access the thermalcomponents. See Removing the Toe Panel,page 9.

3. Perform TEST #4b, page 7. If the thermal fuseis OK, go to step 4.

4. Perform TEST #4c, page 7. If the thermalcut-off is OK, go to step 5.

5. Locate the high limit thermostat. See figure 11.Measure the continuity through it byconnecting the meter probes on the red wireand black wire terminals.

If there is an open circuit, replace the highlimit thermostat and the thermal cut-off.

Otherwise, go to step 6.

6. Perform TEST #4d, page 8. If this is OK,replace the machine control electronics.

Heat will not shut off:1. Unplug dryer or disconnect power.

2. Access the machine control electronics. Seefigure 18, page 10, for connector location;and Accessing & Removing the ElectronicAssemblies, page 9.

ALL DRYERS: Remove the P14 connector,then measure the resistance between P14-3(red wire) and P14-6 (red wire) at the connector.

If 5–15 kΩ are measured, replace themachine control electronics.

If the resistance is greater than 20 kΩ,replace the outlet thermistor.

Figure 11. Thermal Components, viewedfrom front.

Lt. BlueWires

Belt SwitchBelt SwitchPulley

15

34

62

Figure 10. Checking the belt switch.



TEST #4a Thermistors

Outlet ThermistorThe machine control electronics monitors theexhaust temperature using the outlet thermistor,and cycles the heater relay on and off to maintainthe desired temperature.

Begin with an empty dryer and a clean lint screen.


2. Start the Timed Dry cycle.

3. If after 60 seconds,F:22 or F:23 flashes in thedisplay and the dryer shuts off, the thermistoror wire harness is either open or shorted.

Unplug dryer or disconnect power.

Check wire connections at the machinecontrol electronics and thermistor. SeeAccessing & Removing the ElectronicAssemblies, page 9, and for thermistorlocation, see figure 11, page 6.

If wire connections are OK, check the outletthermistor resistance per step 5.

4. If F:22 or F:23 does not flash in the display,the connections to the thermistor are good.Therefore, check the exhaust temperaturevalue at any or all of the temperature levelsin question, using the Timed Dry cycle,and the following process:

Hold a glass bulb thermometer capable ofreading from 90° to 180°F (32° to 82°C) inthe center of the exhaust outlet. The correctexhaust temperatures are as follows:

EXHAUST TEMPERATURES

TEMPERATURESETTING

HEAT TURNS OFF*°F (°C)

HEAT TURNS ON°F (°C)

High 155°±5° (68°±3°)10–15° (6–8°)

below theheat turn offtemperature

Medium 140°±5° (60°±3°)

Low 125°±5° (52°±3°)

Extra Low 105°±5° (41°±3°)

* The measured overshoot using the glass bulbthermometer in the exhaust outlet can be 30°F(17°C) higher.

5. If the exhaust temperature is not withinspecified limits, or you have come herefrom step 3, perform the following:

NOTE: All thermistor resistance measurementsmust be made while dryer is unplugged ordisconnected from power.

ALL DRYERS: Remove the P14 connector,then measure the resistance between P14-3(red wire) and P14-6 (red wire) at theconnector.

If the resistance is OK, check P14-3 andP14-6 to dryer ground.

If resistance is greater than 0 (zero), replacewiring harness.

ALL DRYERS:

The following table gives temperatures andtheir associated resistance values.

OUTLET THERMISTOR RESISTANCE

TEMP.°F (°C)

RES.RANGE

kΩTEMP.

°F (°C)RES.

RANGEkΩ

50° (10°) 19.0–22.0 80° (27°) 8.5–10.5

60° (16°) 14.8–16.8 90° (32°) 6.8–8.8

70° (21°) 11.5–13.5 100° (38°) 5.0–7.0

If the thermistor resistance does not agreewith table, replace the outlet thermistor.

If the thermistor resistance checks agreewith the measurements in the table, replacethe machine control electronics.

TEST #4b Thermal FuseELECTRIC DRYER: The thermal fuse is wiredin series with the dryer drive motor.

GAS DRYER: The thermal fuse is wired in serieswith the dryer gas valve.

ALL DRYERS:


2. Access the thermal fuse by first removing thetoe panel. See Removing the Toe Panel, page 9;and for thermal fuse location, see figure 11,page 6.

3. Using an ohmmeter, check the continuityacross the thermal fuse.

If the ohmmeter indicates an open circuit,replace the failed thermal fuse.

TEST #4c Thermal Cut-OffIf the dryer does not produce heat, check thestatus of the thermal cut-off.


2. Access the thermal cut-off by first removingthe toe panel. See Removing the Toe Panel,page 9.

3. Using an ohmmeter, check the continuityacross the thermal cut-off. See figure 11,page 6, for location.

4. If the ohmmeter indicates an open circuit,perform the following:

ELECTRIC DRYER: Replace the failedthermal cut-off and high limit thermostat.In addition, check for blocked or improperexhaust system, or failed heat element.

GAS DRYER: Replace the failed thermal cut-offand high limit thermostat. In addition, check forblocked or improper exhaust system.



TEST #4d Gas Valve, Gas Dryer1. Unplug dryer or disconnect power.

2. Access the gas valve by removing the toepanel. See Removing the Toe Panel, page 9.

3. Use an ohmmeter to determine if a gas valvecoil has failed. Remove harness plugs.Measure resistance across terminals. Readingsshould match those shown in the followingchart. If not, replace coil.

Terminals Resistance

1 to 2 1365 ± 601 to 3 560 ± 254 to 5 1325 ± 55

IMPORTANT:Be sure all harness wiresare looped back through thestrain relief after checkingor replacing coils.

TEST #5 Moisture SensorNOTE: This test is started with the dryercompletely assembled.This test is performed when an automatic cyclestops too soon, or runs much longer thanexpected.

NOTE: Dryer will shut down automatically after2½ hours.

The following items are part of this system:

Harness/connection

Metal sensor strips

Machine control electronics. See ESD information,page 1.

1. Activate the Diagnostic Test Mode and advancepast saved fault codes. See procedure onpage 1.

2. Open the dryer door. The dryer will beep andan alphanumeric number will be displayed.

3. Locate the two metal sensor strips on the faceof the lint screen housing. Using a wet cloth orone finger, jointly touch both strips.

If a beep tone is heard and an alphanumericnumber is displayed on the console, thesensor passes the test. Go to step 9.

If a beep tone is not heard, or a continuousbeep tone is heard before touching bothmoisture strips, continue with step 4.

NOTE: Overdrying may be caused by a shortcircuit in the sensor system.

4. Access the moisture sensor wires by removingthe toe panel. See Removing the Toe Panel,page 9. Disconnect the sensor wires from theharness. See figure 12.

5. Access the machine control electronics. SeeAccessing & Removing the Electronic Assemblies,page 9. Remove connector P13 from thecircuit board. Check the main harnessconnections between the sensor harness andmachine control for a short or open circuit.

Replace the main harness if necessary.

If harness is OK, continue with step 6.

6. Access the moisture sensor by removing thetoe panel. See Removing the Toe Panel, page 9.Disconnect the sensor from the wire harness.See figure 12.

7. Measure the resistanceacross the outermostcontacts of the cable thatincludes the two red MOVs.

If a small resistance is measured, checkfor debris across moisture strips inside thedrum; clean if debris is present. If debrisis not present, replace sensor harness.

If a small resistance is not measured,continue with step 8.

8. Measure the resistance acrosseach of the outermostcontacts and the centerterminal (ground connection).

If a resistance less than infinity is measured,replace the sensor harness.

9. If moisture sensor diagnostic test passes,check the thermistor: Perform TEST #4a,page 7.

If the problem persists after replacing themoisture sensor and thermistor, replace themachine control electronics.

TEST #5a AdjustingCustomer-Focused Drying ModesNOTE: If the customer is complaining about theclothes being damp and the moisture sensorpasses TEST #5, step 3, the total dry time can belengthened by changing from a “CF1” (standardauto cycle) to a “CF2” (15% more drying time) or“CF3” (30% more drying time) auto cycle.

1. In Standby mode (dryer plugged in but notpowered up), press and hold the Dryness Levelbutton for 5 seconds. The dryer will beep andthe current drying mode will be seen on thedisplay. The factory default value is “CF1”.

2. To select a different drying mode, press theDryness Level button again. The dryer displaywill flash and show , , or 1 .

3. With the display flashing the selected autocycle mode, press the Start button to save thedrying mode and exit diagnostics (the Startbutton in this mode does not start a dryingcycle). The result will be stored in EEPROMof the control board, and will be retained aftera power loss.

4. Press the Pause/Cancel button at any timeto cancel changes and exit from this mode.

TEST #6 Buttons and IndicatorsThis test is performed when any of the followingsituations occurs during the Console Buttons andIndicators Diagnostic Test, page 1:

None of the indicators light upNo beep sound is heardSome buttons do not light indicators

None of the indicators light up:1. See Diagnostic Guide/Before Servicing...

on page 1.

2. Perform TEST #1, page 4, to verify supplyconnections.

3. Perform steps in Accessing & Removing theElectronic Assemblies, page 9, and visuallycheck that the P2 connector is inserted all theway into the machine control electronics.


5. If both visual checks pass, replace the consoleelectronics and housing assembly.



8. If indicators still do not light, the machinecontrol electronics has failed:


Replace the machine control electronics.

Plug in dryer or reconnect power.

Perform steps under DIAGNOSTIC: ConsoleButtons and Indicators, page 1, to verifyrepair.

BlowerHousing

Drum

FRONT

HarnessConnection

MOVs(Metal Oxide

Varistors)

Figure 12. Disconnect sensor from wireharness.

CF2CF 3CF



1. Perform steps in Accessing & Removing theElectronic Assemblies, at right, and visuallycheck that the P2 connector is inserted all theway into the machine control electronics.

If visual check passes, replace the consoleelectronics and housing assembly.



4. If replacing the console electronics andhousing assembly failed:



Plug in dryer or reconnect power.

Perform steps under DIAGNOSTIC: ConsoleButtons and Indicators, page 1, to verifyrepair.

Some buttons do not light indicators:1. Perform steps in Accessing & Removing the

Electronic Assemblies, at right, and visuallycheck that the console electronics and housingassembly is properly inserted into the frontconsole.

If visual check passes, replace the consoleelectronics and housing assembly.



TEST #7 Door SwitchRefer to page 1 and perform steps underActivating the Diagnostic Test Mode. Then, on thesame page, perform steps under DIAGNOSTIC:Door Switch. Functionality is verified with a beepeach time the door is closed and opened, and analphanumeric number appears in the display.

If any of the preceding conditions are not met:


2. Check that the wires between the door switchand machine control electronics are connected.See figure 13 for switch location, and seeAccessing & Removing the ElectronicAssemblies, at right.

If the connections are OK, replace the wireand door switch assembly and retest.

If wire and door switch assembly have beenreplaced and dryer still does not start,replace the machine control electronics.

TEST #8 Water Valve(Steam Models Only)

Activate the Diagnostic Test Mode as shown onpage 1. Press Start and verify that water is beingsprayed in the drum. See figure 14.

If no water is sprayed in the drum:

1. Perform steps in Accessing & Removing theElectronic Assemblies, at right, and check thatthe wires are connected to the water valverelay on the machine control electronics. Seefigure 18, page 10.

2. Check that water is hooked up and turned on.

3. Inside the drum, unscrew and replace thewater nozzle using a 7/16" wrench or socket.

4. Perform steps in Removing the Back Panel,page 11, then:

Check that the wires and hose areconnected to the water valve assembly.

Check that the water valve assembly hoseis connected to the nozzle.

5. If everything is hooked up and the water stilldoes not dispense:


Replace the valve assembly.


7. Activate the Service Diagnostic Test Mode,page 1, and check to make sure water is beingsprayed into the drum.

8. If water is still not dispensed:



REMOVING THE TOE PANEL1. Unplug dryer or disconnect power.

2. Remove two screws below the toe panel.

3. Slide the toe panel down, then pull it out fromthe bottom. See figure 15.

ACCESSING & REMOVING THEELECTRONIC ASSEMBLIESThere are two electronic assemblies: the MachineControl Electronics and the Console Electronicsand Housing. See figure 16.


2. Remove the two rear screws from the toppanel, and slide the top panel to the rearto remove.

Machine Control Electronics

1. Perform preceding steps 1 and 2, then removethe two screws that hold the machine controlelectronics bracket in place.

Flange

Figure 15. Pull the toe panel down to clearflange, then pull panel out.

Water Valve Assembly

Water Valve Wires

Water Nozzle

Figure 14. Water System Components.

Figure 13. Door switch location.

FRONT

Machine ControlElectronicsAssembly

Console Electronicsand Housing

Assembly

Figure 16. Locate the electronic assemblies.



2. Slide the bracket over the top of the drumto access the machine control electronicsconnectors and mounting screw. See figure 17.

3. Remove all the wire connections to themachine control electronics. See figure 18.

4. Remove the screw holding the machine controlelectronics assembly to the mounting bracket.See figure 17.

5. There are two plastic legs on the front of themachine control electronics that slide under themounting bracket.

There is one plastic leg on the rear of themachine control electronics that slidesunder the mounting bracket.

There is a locking tab on the bottom of themachine control electronics that snaps intothe mounting bracket.

Press the locking tab on the bottom of themachine control electronics and slide theassembly to the front, then lift.

3. Gently remove the decorative trim thatsurrounds the door and upper console byunsnapping it from the dryer. See figure 20.

4. Slide the console up and off of the dryer.See figure 19.

5. The console mounting bracket is fastened tothe console front panel with two latches at bothsides of the console assembly. Unlatch thebracket gently with a screwdriver while pullingthe mounting bracket assembly out. Seefigure 19.

6. The console electronics is split into twoassemblies connected by two cables. Eachassembly is fastened to the decorative pieceby four plastic latches. To remove theseassemblies, gently compress the plasticlatches while pulling up on the assembly. Forthe cycle selector assembly, the cycle selectorknob must first be removed by firmly pullingon it or gently prying it straight upward. Seefigure 21, page 11.

Console Electronicsand Housing Assembly

The console panel must be removed to accessthe console electronics and housing assembly.

1. Perform steps 1 and 2 under Accessing &Removing the Electronic Assemblies, page 9,and disconnect the P2 harness from themachine control.

2. Remove the screw that fastens the assemblyto the machine control mounting bracket(figure 17), and the two screws that fasten theconsole assembly to the dryer (figure 19).

P9

1

5

1

P14P2

3

11

6

1

1

8

3

P5

P31P13

1

P/NXXXXXXRevX

DateCodeYDDD-xx

XXXX-XXXMADEINCOO

N.O.Black

COMRed

HeaterRelay 1

MotorRelay

Black-White

WhiteGreen-Yellow

Brown

Lt. Blue Black Yellow-Red

Open

Black (Gas)

Red

P4

N.O.Black

Water Valve Relay(Steam Models Only)

COMRed

P8

Figure 18. Machine control electronics.

Figure 20. Remove the decorative trim.

Machine Control ElectronicsBracket Screws

FRONT

Machine ControlElectronics Mounting Screw

Figure 17. Remove machine control electronicsfrom mounting bracket.

Figure 19. Remove the console panel to accessthe console electronics and housing assembly.

Tan



1M 2M 3M 5M 6M

=

Contacts

Function

Start

Run

Centrifugal Switch(Motor)

Black

Blue

BlueWWHHIITTEE

White

White

Gas Valve, Gas Dryer

Black-WhiteLt. Blue

Green-Yellow

RedRed

Pluggable Drive Motor Switch

SOFTWARE COPYRIGHTED.MANUFACTURED UNDER ONE OR MORE

OF THE FOLLOWING U.S. PATENTS:

4669200470049547545564840285486536648994644908959

4989347506605055601205809828602069860474866199300

6446357659714466042986685241673244767846736819255

D314261D314262D457991D457992D495453

REMOVING THE BACK PANEL1. Unplug dryer or disconnect power.

2. Remove the two rear screws from the toppanel, and slide the top panel to the rearto remove.

3. Remove the cover plate, disconnect the powercord, and remove ground screw.

4. Remove the metal spring clip between the backpanel and the exhaust outlet. See figure 22.

5. Remove the ten screws on the rear, and twoscrews on the top of the back panel. Pull theback panel off the dryer. See figure 22.

ELECTRIC DRYER: In addition to the above,remove the terminal block from the back panel.

Figure 21. Locate 8 plastic latches.

Figure 22. Remove 12 screws.

Contacts closed

05/09 FOR SERVICE TECHNICIAN’S USE ONLY PART NO. W10258368B


ELECTRIC DRYER WIRING DIAGRAM IMPORTANT: Electrostatic (static electricity) discharge may causedamage to machine control electronics. See page 1 for details.

GAS DRYER WIRING DIAGRAM

P8-2GND

R

CENTRIFUGALSWITCH

2M

1M

5M

6M3M

R – LINE L2

W

DOORSWITCH

W – NEUTRAL N

T

LBU

LBU

W

P8-4

P8-3

P9-1

P8-5 BK-W THERMAL FUSE4M

DRIVE MOTOR1/3 H.P.

MAIN3.3–3.6START

2.7–3.0

SENSOR

DOOR

NEUTRAL

MOTOR

MTR CS

MOIST.

MOIST RTN

MODEL

MODEL RTN

OUTLET TEMP.

OUTLETTEMP. RTN

MACHINECONTROL

ELECTRONICS

Y-R

P13-1

P13-2

P4-4

P4-5

P14-3

P14-6

R OUTLET THERMISTOR

P9-2L1

BR

L1 LINE – BK

HEATER +V

HEATER RTN

N.O.

COM

BK

BK

BK

R

R-W

NC

HIGH LIMITTHERMOSTATTHERMAL CUT-OFF

HEATER

7.8–11.8

DRUM LAMP

G-Y

P4-2

INLETTEMP. RTN

R

240 VOLTS

120 VOLTS

P2-1 VDD

P2-2 DATA

P2-3 VSS

CONSOLEELECTRONICS

BELTSWITCH

HEATER RELAY

G-Y

G-Y

SENSOR MOVS

Y-RY-R

BK

WP8-1

SERIALCOM

INLET TEMP.

P4-1

R

BU

NC

NO

R-W

W

(0.25 TERMINAL)

(0.25 TERMINAL)

P005-3 VDD

P005-2 DATA

P005-1 VSS

R

NEUTRALTERMINALLINKED TOCABINET

LBU

+5 V GndN.C.

P003-1 P003-2 P003-3

P5-1 VDD

P5-5 DATA OUT

P5-8 12 VDC

P5-2 DATA INP5-3 VSSP5-4 STROBE

P5-6 CLOCKP5-7 BUZZER

LAMPLOAD LBU

- - P25 - -1 2 3

BK-WVALVE

510–590 Ω

N.O. COMVALVERELAY

BK R

P8-2GND

L1 LINE – BKBK

LBU

P8-4

P8-3

P9-1

P8-5

DOOR

NEUTRAL

MOTOR

MTR CS

MOIST.

MOIST RTN

MODEL

MODEL RTNP14-5

P14-3

P14-6

R

R

BK-W

HEATER RELAY

HEATER +V

HEATER RTN

N.O.

COM

BK

P9-2BKL1

W

W – NEUTRAL N

T

W

5M

6M3M

BU

BELTSWITCH

MAIN3.3–3.6

START2.7–3.0

OUTLET THERMISTOR

2M

1M

R

R-W

NC

1V

2 1

IG IGR

50–5003

4

FS1 FS2

VALVEMOV

HOLD ASSIST

MAIN

IGNITOR

VALVENO. 1

VALVENO. 2

FLAME SENSOR

P2-1 VDD

P2-2 DATA

P2-3 VSS

THERMAL FUSE

BK

(0.25 TERMINAL)

R

R

G-Y

P14-1

P14-2N.C.

N.C.

LBU

120 VOLTS

4M

DRIVE MOTOR1/3 H.P.

DOORSWITCHG-Y

Y-R

P13-1

P13-2

P14-4

Y-R

SENSOR

G-Y

SENSOR MOVS

Y-R

BK

TEMP.

TEMP RTN

THERMALCUT-OFF

MACHINECONTROL

ELECTRONICS

NC

NO

W

BU

LBU

(0.25 TERMINAL)

CONSOLEELECTRONICS

P005-3 VDD

P005-2 DATA

P005-1 VSSSERIALCOM

BK

RHIGH LIMIT

THERMOSTAT

LAMPLOAD

5

BRBK

DRUM LAMP P8-1

CENTRIFUGALSWITCH

+5 V GndN.C.

P003-1 P003-2 P003-3

P5-1 VDD

P5-5 DATA OUT

P5-8 12 VDC

P5-2 DATA INP5-3 VSSP5-4 STROBE

P5-6 CLOCKP5-7 BUZZER

- - P25 - -1 2 3

BK-W

N.O. COMVALVERELAY

BK RVALVE

510–590 Ω

STEAM MODELS ONLY

STEAM MODELS ONLY

warning diagnostic: console buttons and · if owa teri sp ,g tes #5 page 8. if water is present,...

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