8572745.pdf 110.87562601

TECH SHEET - DO NOT DISCARD PAGE 1

FOR SERVICE TECHNICIANS USE ONLY PART NO. 8572745 REV. A

WARNINGElectrical Shock Hazard

Disconnect power before servicing.Replace all parts and panels before operating.Failure to do so can result in death orelectrical shock.

IMPORTANT

Electrostatic Discharge (ESD)Sensitive Electronics

ESD problems are present everywhere. ESD may damageor weaken the machine control electronics. The new controlassembly may appear to work well after repair is finished,but failure may occur at a later date due to ESD stress.

Use an anti-static wrist strap. Connect wrist strap togreen ground connection point or unpainted metal inthe appliance

-OR-Touch your finger repeatedly to a green groundconnection point or unpainted metal in the appliance.

Before removing the part from its package, touch theanti-static bag to a green ground connection point orunpainted metal in the appliance.

Avoid touching electronic parts or terminal contacts;handle machine control electronics by edges only.

When repackaging failed machine control electronics inanti-static bag, observe above instructions.

DIAGNOSTIC GUIDEBefore servicing, check the following:

Make sure there is power at the wall outlet.

Has a household fuse blown or circuit breaker tripped? Timedelay fuse?

Is dryer vent properly installed and clear of lint orobstructions?

All tests/checks should be made with a VOM(volt-ohm-milliammeter) or DVM (digital-voltmeter) having asensitivity of 20,000 ohms per volt DC or greater.

Check all connections before replacing components. Look forbroken or loose wires, failed terminals, or wires not pressedinto connectors far enough.

A potential cause of a control not functioning is corrosion onconnections. Observe connections and check for continuitywith an ohmmeter.

Connectors: Look at top of connector. Check for broken orloose wires. Check for wires not pressed into connector farenough to engage metal barbs.

Resistance checks must be made with dryer unplugged orpower disconnected.

DIAGNOSTIC TESTSThese tests allow factory or service personnel to test and verifyall inputs to the machine control electronics. You may want to doa quick and overall checkup of the dryer with these tests beforegoing to specific troubleshooting tests.

ACTIVATING THE DIAGNOSTIC TEST MODE1. Be sure the dryer is in standby mode (plugged in with all

indicators off, or with only the Clothes Dry indicator on).

2. Select any one button (except STOP) and follow the stepsbelow, using the same button (remember the button):

Press/hold3 seconds

Release for3 seconds

Press/hold3 seconds

Release for3 seconds

Press/hold3 seconds

3. If this test mode has been entered successfully, all indicatorson the console are illuminated for 5 seconds with 88 showingin the Estimated Time Remaining two-digit display. If there areno saved fault codes or active fault codes, all indicators onthe console will momentarily turn off, then stay on with 88displayed.

DIAGNOSTIC: Unsuccessful EntryIf entry into diagnostic mode is unsuccessful, refer to thefollowing indications and actions:

Indication 1: None of the indicators or display turns on.

Action: Select any cycle.

If indicators come on, try to change the function for thebutton used to activate the diagnostic test mode. If thatbutton fails to change the function, something is faulty with

the button, and it is not possible to enter the diagnosticmode. Remove the console electronics and housingassembly. See Accessing & Removing the ElectronicAssemblies, page 10.

If no indicators come on after selecting the cycle, go toTEST #1, page 4.

Indication 2: Fault code flashes from the display.

Action: Review the Display Fault/Error Codes table, page 2, forthe recommended procedure.

DIAGNOSTIC: Saved Fault CodesIf there are saved fault codes, the most recent fault code willalternately show F- and XX where XX is the fault code, and allthe cycle selector indicators flash.

Press and release thesame button used toactivate Diagnostics

beep tone Second most recent fault code isdisplayed.

Repeat beep tone Third most recent fault code isdisplayed.

Repeat beep tone Fourth most recent fault code isdisplayed.Repeat All indicators momentarily turn off, then stay on.

DIAGNOSTIC: Active Fault CodesIf there is an active fault code, it will be flashing in the display(the cycle indicators do not flash). Review the Display Fault/ErrorCodes table, page 2, for the recommended procedure.

If there is no active fault code, 88 will be displayed.

DIAGNOSTIC: Console Buttons and IndicatorsPressing buttons and rotating the cycle selector will turn off thecorresponding indicator and sound a beep as shown in figure 1,Console Diagnostics, page 2. Pressing MORE TIME will togglethe left digit on the display while sounding a beep. PressingLESS TIME will toggle the right digit on the display whilesounding a beep.

If indicators fail to come on and beep after pressing buttons androtating the cycle selector, go to TEST #5, page 9.



This button controlsthe left digit.

This button controlsthe right digit.

This button controlsall indicators above

button.

Each buttoncontrols its

own indicator.

Turns off all indicatorsand exits diagnostic

mode.

This button controlsall indicators above

bu t t on .

Power button controlsStatus indicators at left.

Start buttonturns on dryer.

Figure 1. Console Diagnostics.

1M 2M 3M 5M 6M

= Contacts closed

Contacts

Function

Start

Run

Centrifugal Switch(Motor)

Black

Blue

BlueWHITE

White

White

Gas Valve, Gas Dryer

Red

Lt. BlueBlue-White (Elec)

White (Gas)Green-Yellow

Red

Black-White

Pluggable Drive MotorSwitch

DIAGNOSTIC: Door SwitchOpening the door should cause a beep and analphanumeric number to be displayed. Closingthe door should cause a beep and 88 to bedisplayed.

If opening the door fails to cause a beep andan alphanumeric number to be displayed, goto TEST #6, page 9.

DIAGNOSTIC: Moisture SensorOpen the door and locate two metal strips onthe face of the lint screen housing. Bridgethese strips with a wet cloth or a finger. If abeep is heard and an alphanumeric number isdisplayed on the console, the sensor is OK. Ifnot, or if a beep tone is heard before bridgingthe moisture strips, go to TEST #4, page 8.

DIAGNOSTIC: Motor, Heater, andConsole IDClose the door. Press the START button. Themotor and heater will turn on, and the display

will show one of the following Console IDs:80, 81, 86, 87, 88, 89, 8A, 8b , 8C, 8d , 8E, 8F,90, 91, 92, 93, 94, 95, 96, or 97.

While running, press the START button again.The motor and heater will turn off, and thedisplay will show 88.

If none of the Console IDs above aredisplayed, replace the console electronicsand housing assembly. See Accessing &Removing the Electronic Assemblies,page 10.

If the motor does not turn on, go toTEST #2, page 5.

If no heat is detected, go to TEST #3,page 6.

DEACTIVATING THE DIAGNOSTICTEST MODEPress the STOP button to exit diagnostics.

DISPLAY FAULT/ERROR CODES The fault codes below would be indicated whenattempting to start a drying cycle, or after activating the diagnostic test mode.

DISPLAY DESCRIPTION EXPLANATION AND RECOMMENDED PROCEDURE

PF Power FailurePF flashes to indicate that a power failure occurred while the dryer was running.Press START to continue the cycle, or press STOP to clear the display.

F-01 Primary Control FailureF-01 flashes when there is a primary control failure. Replace the machinecontrol electronics. See Accessing & Removing the Electronic Assemblies,page 10.

F-02Keypad/User Interface

Failure

F-02 flashes when there is a stuck button or user interface mismatch. This faultcode will ONLY appear when in the diagnostic test mode. See TEST #5,page 9.

F-22 Exhaust Thermistor Open F-22 flashes if the thermistor is open. See TEST #3a, page 7.

F-23 Exhaust Thermistor Shorted F-23 flashes if the thermistor has shorted. See TEST #3a, page 7.

F-26 Motor Drive System Failure F-26 flashes if there is a motor drive system failure. See TEST #2, page 5.

F-28 Moisture Sensor OpenF-28 flashes if the moisture sensor strip is open. This fault code will ONLYappear when in the diagnostic test mode. See TEST #4, page 8.

F-29 Moisture Sensor ShortedF-29 flashes if the moisture sensor strip has shorted. This fault code will ONLYappear when in the diagnostic test mode. See TEST #4, page 8.



P8-2GND

P8-2GND

R

CENTRIFUGAL SWITCH 2M

1M

5M

6M3M

R LINE L2

W

DOORSWITCH

W NEUTRAL N

T

LBULBU

W

BU-W

P8-4

P8-3 NEUTRAL

P9-1

P8-5 BK-W THERMAL FUSE196F 91C( ) 4M

DRIVE MOTOR1/3 H.P.

MAIN2.43.6

START2.43.8

SENSOR

DOOR

NEUTRAL

MOTOR

MTR CS

MOIST.

MOIST RTN

MODELMODEL RTN

EXHAUST TEMP.

EXHAUSTTEMP RTN

MACHINE CONTROLELECTRONICS

Y-R

P13-1

P13-2

P14-4P14-5

P14-3

P14-6

R-W

R-W

EXHAUST THERMISTOR

10k

P9-2L1

BR

L1 LINE BK

L1 LINE BK

DRUM LAMP

BK BR

LBU

P8-4

P8-3 NEUTRAL

P9-1

P8-5

DOOR

NEUTRAL

MOTOR

MTR CS

MOIST.

MOIST RTN

MODEL

MODEL RTNP14-5

P14-3

P14-6

R-W

R-W

BK-W

HEATERRELAY 1

HEATER +V

HEATER RTN

N.O.

COM

R

P9-2BK L1

W

W NEUTRAL N

T

W

CENTRIFUGAL SWITCH5M

6M3M

BU

BELTSWITCH

MAIN2.43.6 START

2.43.8

EXHAUST THERMISTOR

10k

2M

1M

R RHI LIMIT

THERMOSTAT205F 96C( )

HS1 HS2

NC

3V

1V

2 1

IG IGR

50500 3

4 5

FS1 FS2

VALVEMOV

HOLD ASSIST

MAIN

IGNITOR

VALVENO. 1

VALVENO. 2

FLAME SENSOR

O

HEATER +V

HEATER RTN

N.O.

COM

BK

P2-1 VDDP2-2 DATAP2-3 VSS

BK

BK

THERMAL FUSE196F 91C( )

TF1 TF2 R

R BK

NC

R-WHI LIMIT

THERMOSTAT295F (146C)

THERMALCUT-OFF

352F (178C)

HEATER7.811.8

R

DRUM LAMP

BK

R

R

G-Y

G-Y

P14-1P14-2

N.C.N.C.

P8-1LAMP (N.C.)

LAMP(N.C.) P8-1

P14-1

P14-2

N.C.

N.C.

R

LBU

W

240 VOLTS

120 VOLTS

4M

120 VOLTS

P5-1 VDD

P5-5 DATA OUT

P2-1 VDDP2-2 DATAP2-3 VSS

P5-8 +/- 12 VDC

CONSOLEELECTRONICS

VDD P1-8DATA IN P1-7

VSS P1-6STROBE P1-5

DATA OUT P1-4

+/- 12 VDC P1-1BUZZER P1-2CLOCK P1-3

P5-2 DATA INP5-3 VSSP5-4 STROBE

P5-6 CLOCKP5-7 BUZZER

DRIVE MOTOR1/3 H.P.

BELTSWITCH

P5-1 VDD

P5-5 DATA OUT

P5-8 +/- 12 VDC

VDD P1-8DATA IN P1-7

VSS P1-6STROBE P1-5

DATA OUT P1-4

BUZZER P1-2CLOCK P1-3

P5-2 DATA INP5-3 VSSP5-4 STROBE

P5-6 CLOCKP5-7 BUZZER

+/- 12 VDC P1-1

HEATERRELAY 1

DOORSWITCH

G-Y

G-Y

G-Y

SENSORMOVS

Y-R Y-R

BK

Y-R

P13-1

P13-2

P14-4

Y-R

SENSORG-Y

SENSORMOVS

Y-R

BK

NEUTRALTERMINALLINKED TOCABINET

W

EXHAUST TEMP.

EXHAUSTTEMP RTN

MACHINE CONTROLELECTRONICS

CONSOLEELECTRONICS

ELECTRIC DRYER WIRING DIAGRAM IMPORTANT: Electrostatic (static electricity)discharge may cause damage to machinecontrol electronics. See page 1 for details.

GAS DRYER WIRING DIAGRAM



PROBLEM POSSIBLE CAUSE / TEST

NOTE: Possible Cause/Tests MUST be performed in the sequence shown for each problem.

WONT POWER UP.(No response when buttons arepressed.)

1. Supply connections. See TEST #1 at right.2. Check harness connections.3. Console electronics and housing assembly. See TEST #5, page 9.

WONT START CYCLE WHENSTART BUTTON IS PRESSED.

1. If number display flashes, check to be sure the door is completelyshut, and press and hold down START for about 1 second.

2. See TEST #2, page 5.3. See TEST #6, page 9.

WONT SHUT OFF WHENEXPECTED.

1. Check STOP button. See TEST #5, page 9.2. Console electronics and housing assembly. See TEST #5, page 9.3. Moisture sensor. See TEST #4, page 8.

CONTROL WONT ACCEPTSELECTIONS. Console electronics and housing assembly. See TEST #5, page 9.

WONT HEAT.1. Heater. See TEST #3, page 6.2. Check harness connections.3. Check installation.

HEATS IN AIR CYCLE. Heater. See TEST #3, page 6.

SHUTS OFF BEFORE CLOTHESARE 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 #4, page 8.5. Dryness level adjust. See TEST #4a, page 9.

TROUBLESHOOTINGGUIDE

Some tests will require accessing components.See figure 2 for component locations. TROUBLESHOOTING TESTS

NOTE: These checks are done with thedryer unplugged or disconnected frompower.

TEST #1 Supply ConnectionsThis test assumes that proper voltage ispresent at the outlet, and visual inspectionindicates that the power cord is securelyfastened to the terminal block (electricdryer) or wire harness connection (gasdryer).

ELECTRIC DRYER:

1. Unplug dryer or disconnect power.

2. Remove the cover plate from the topright corner of the back of the dryer.See figure 3.

3. With an ohmmeter, check for continuitybetween the neutral (N) terminal of theplug and the center contact on theterminal block. See figure 4.

If there is no continuity, replace thepower cord and test the dryer.

If there is continuity, go to step 4.

4. In a similar way, check which terminalof the plug is connected to theleft-most contact on the terminal blockand make a note of it. This will be L1(black wire) in the wiring diagram. Seefigure 4.

When this is found, go to step 5.

If neither of the plug terminals havecontinuity with the left-most contactof the terminal block, replace thepower cord and test the dryer.

RemoveScrew

CoverPlate

Figure 3. Remove the cover plate.

Moisture SensorStrips

HeaterAssembly

DoorSwitch

See Accessing & Removing theElectronic Assemblies, page 10, to access:

See Removing the BackPanel, page 11, to access:

See Removing the Toe Panel,page 10, to access:

Machine Control ElectronicsConsole Electronicsand Housing

Drum Light AssemblyBlower Motor Assembly

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

Figure 2. Component locations.

COM

N L1Power Cord

Plug Terminal Block

Figure 4. Plug-to-terminal connectionsfor electric dryer.



5. Access the machine control electronicswithout disconnecting any wiring to thecontrol board. See Accessing &Removing the Electronic Assemblies,page 10.

6. With an ohmmeter, check for continuitybetween the L1 terminal of the plug(found in step 4) and P9-2 (black wire)on the machine control board. Seefigure 17, page 10.


If there is no continuity, check thatwires to the terminal block aremechanically secure. If so, replacethe main wire harness and test thedryer.

7. Check for continuity between theneutral (N) terminal of the plug andP8-3 (white wire) on the machinecontrol board.


If there is no continuity and themechanical connections of the wireare secure, replace the main wireharness.

8. Visually check that the P5 connector isinserted all the way into the machinecontrol electronics.

9. Visually check that the consoleelectronics and housing assembly isproperly inserted into the front console.

10. If both visual checks pass, replace theconsole electronics and housingassembly.

11. Plug in dryer or reconnect power.

12. Perform the Console Buttons andIndicators Diagnostic test, page 1 toverify repair.

13. If indicators still do not light, themachine control electronics hasfailed:

Unplug dryer or disconnect power.

Replace the machine controlelectronics.

Plug in dryer or reconnect power.

Perform the Console Buttons andIndicators Diagnostic test, page 1to verify repair.

GAS DRYER:


2. Remove the cover plate from the topright corner of the back of the dryer.See figure 3, page 4.

3. Check that the power cord is firmlyconnected to the dryers wire harness.See figure 5.

4. Access the machine control electronicswithout disconnecting any wiring to thecontrol board. See figure 16, page 10.

5. With an ohmmeter, check for continuitybetween the neutral (N) terminal of theplug and P8-3 (white wire) on themachine control board. The left-handside of figure 6 shows the position of theneutral terminal (N) on the power cordplug. Also see figure 17, page 10.


If there is no continuity, disconnectthe white wire of the harness fromthe power cord at the locationillustrated in figure 5. Test thecontinuity of the power cord neutralwire as illustrated in figure 6. If anopen circuit is found, replace thepower cord. Otherwise, go to step 6.

6. In a similar way, check the continuitybetween the L1 terminal of the plugand P9-2 (black wire) on the controlboard.


If there is no continuity, check thecontinuity of the power cord in asimilar way to that illustrated infigure 6, but for power cords L1wire.

If an open circuit is found, replace thepower cord. Otherwise, go to step 7.

7. Replace the main harness.

8. Visually check that the P5 connector isinserted all the way into the machinecontrol electronics.

9. Visually check that the consoleelectronics and housing assembly isproperly inserted into the front console.




13. If indicators still do not light, themachine control electronics hasfailed:





TEST #2 Motor CircuitThis test will check the wiring to the motorand the motor itself. The following itemsare part of this motor system:

Part of Motor System ElectricDryerGasDryer

Harness/connection Thermal fuse noBelt/belt switch Drive Motor Centrifugal switch Door switch Machine control electronics.See ESD information, page 1.


2. Access the machine control electronicsand measure the resistance acrossP8-4 and P9-1. See Accessing &Removing the Electronic Assemblies,page 10.

If resistance across P8-4 and P9-1 isin the range of 1 to 6 ohms, replacethe machine control electronics.

Otherwise, go to step 3.

3. Check the wiring and components inthe path between these measurementpoints by referring to the appropriatewiring diagram (gas or electric) onpage 3.

ELECTRIC DRYER ONLY: Check thethermal fuse. See TEST #3b, page 8.

ALL DRYERS: Continue with step 4,following on page 6, to test theremaining components in the motorcircuit.

COM

N

N

G

G

L1

Power CordPlug

L1

Figure 6. Power cord terminals, gasdryer.

Power Cord

WireHarness

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



4. Check the belt switch and drive motor.Access the belt switch and drive motorby removing the back panel. SeeRemoving the Back Panel, page 11.Slowly remove the drum belt from thespring-loaded belt switch pulley, gentlyletting the belt switch pulley down. Seefigure 7.

5. Remove the white connector from thedrive motor switch. See figure 8.

6. Using figure 9, check for the resistancevalues of the motors Main and Startwinding coils as shown in the followingtable.

NOTE: Main and Start winding coilsmust be checked at the motor.

Winding Resistance Contact Pointsof Measurement

MAIN 2.43.6

Lt. blue wire in back atpin 4 and bare copperwire on pin 5 of black

drive motor switch

START 2.43.8

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

drive motor switch

If the resistance at the motor iscorrect, there is an open circuitbetween the motor and machinecontrol electronics. Check for failedbelt switch.

If the Start winding is in question andthe resistance is much greater than4 ohms, replace the motor.

7. Check the belt switch by measuringresistance between the two light bluewires, as shown in figure 10, whilepushing up the belt switch pulley.

If the resistance reading goes frominfinity to a few ohms as pulley armcloses the switch, belt switch is OK.If not, replace the belt switch.

If belt switch is OK and there is stillan open circuit, check and repair thewiring harness.

8. Door Switch problems can beuncovered in the Door SwitchDiagnostic Test, page 2; however, if thiswas not done, the following can bedone without applying power to thedryer. Connect an ohmmeter acrossP8-3 (neutral, white wire) and P8-4(door, tan wire).

With the door properly closed, theohmmeter should indicate a closedcircuit (02 ohms).

If not, replace the door switchassembly.

TEST #3 HeaterThis test is performed when either of thefollowing situations occur:

Dryer does not heat Heat will not shut off

This test checks the components makingup the heating circuit. The following itemsare part of this system:

Part of Heating System ElectricDryerGasDryer

Harness/connection Heater relay Thermal cut-off Thermal fuse no High limit thermostat Heat element assembly noGas burner assembly no Centrifugal switch Exhaust thermistor Machine control electronics.See ESD information, page 1.

Console electronics andhousing assembly

Gas supply no

Dryer does not heat:Locate the components using figure 11,page 7.

ELECTRIC DRYER:


2. Remove the toe panel to access thethermal components. See figure 14,page 10.

3. Using an ohmmeter and referring to thewiring diagram, measure the resistancefrom the red wire terminal at thethermal cut-off to the red wire terminalat the heater.

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

If an open circuit is detected, go tostep 4.

4. Visually check the wire connections tothe thermal cut-off, high limitthermostat, and heater. If connectionslook good, check for continuity acrosseach of these components.

Replace the heater if it is electricallyopen.

Replace both the thermal cut-off andhigh limit thermostat if either one iselectrically open.

5. If no open circuit is detected, removethe P14 connector, then measure theresistance between P14-3 (red-whitewire) and P14-6 (red-white wire) at theconnector. See figure 17, page 10 forconnector location; and Accessing &

DrumBelt

Belt Switch Pulley

Figure 7. Slowly remove drum belt.

WhiteConnector

Drive MotorSwitch

15

34

62

Figure 8. Remove white connector.

Main Winding:Lt.

and Bare Copper WireBlue Wire in Back

Start Winding:Lt.

andBare Copper

Wire

Blue Wirein Back

15

34

62

Figure 9. Main and start windingmeasure points.

Lt. BlueWires

Belt SwitchBelt SwitchPulley

15

34

62

Figure 10. Checking the belt switch.



Removing the Electronic Assemblies,page 10.

If 515 k ohms are measured, replacethe machine control electronics.

If the resistance is less than 1 k ohm,replace the exhaust thermistor.

GAS DRYER:


2. Remove the toe panel to access the ther-mal components. See figure 14, page 10.

3. Perform TEST #3b, page 8. If thethermal fuse is OK, go to step 4.

4. Perform TEST #3c, page 8. If thethermal cut-off is OK, go to step 5.

5. Locate the high limit thermostat. Seefigure 11. Measure the continuitythrough it by connecting the meterprobes on the red wire and blue wireterminals.

If there is an open circuit, replace thehigh limit thermostat and thermalcut-off.

Otherwise, go to step 6.

6. Perform TEST #3d, 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 electron-ics. Remove the P14 connector, thenmeasure the resistance between P14-3

(red-white wire) and P14-6 (red-whitewire) at the connector. See figure 17,page 10 for connector location; andAccessing & Removing the ElectronicAssemblies, page 10.

If 515 k ohms are measured,replace the machine controlelectronics.

If the resistance is greater than20 k ohms, replace the exhaustthermistor.

TEST #3a Exhaust ThermistorThe machine control electronics monitorsthe exhaust temperature using the exhaustthermistor, and cycles the heater relay onand off to maintain the desired temperature.

Begin with an empty dryer and a clean lintscreen.


2. Start the Timed Dry cycle.

3. If after 60 seconds, F-22 or F-23flashes in the display and the dryershuts off, the thermistor or wire harnessis either open or shorted.


Check wire connections at themachine control electronics andthermistor. See Accessing &Removing the Electronic Assemblieson page 10, and for thermistorlocation see figure 11.

Thermal Cut-Off

High Limit Thermostat

Heater Element

FlameSensor

Thermal Fuse

High LimitThermostat

ThermalCut-Off

Thermal Fuse

Exhaust Thermistor Exhaust Thermistor

Figure 11. Thermal Components, viewed from front.

Electric Dryer Gas Dryer

If wire connections are good, re-move the two wires from the thermis-tor and replace the thermistor.


4. If F-22 or F-23 does not flash in thedisplay, the connections to thethermistor are good. Therefore, checkthe exhaust temperature value at any orall of the temperature levels inquestion, using the Timed Dry cycle,and the following process:

Hold a glass bulb thermometer capableof reading from 90 to 180F (32 to82C) in the center of the exhaustoutlet. The correct exhausttemperatures are as follows:

EXHAUST TEMPERATURES

TEMPERATURESETTING

HEAT TURNSOFF*

HEAT TURNSON

High 155 5F(68 3C)

1015F(68C)

below theheat turn offtemperature

Medium High 150 5F(66 3C)

Medium 140 5F(60 3C)

Low 125 5F(52 3C)

Extra Low 105 5F(41 3C)

* The measured overshoot using the glassbulb thermometer in the exhaust outletcan be 30F (17C) higher.



5. If the exhaust temperature is not withinspecified limits, remove the P14connector, then measure the resistancebetween P14-3 (red-white wire) andP14-6 (red-white wire) at the connector.See figure 17, page 10 for connectorlocation; and Accessing & Removingthe Electronic Assemblies, page 10.

NOTE: All thermistor resistancemeasurements must be made whiledryer is unplugged or disconnectedfrom power.

The following table gives temperaturesand their associated resistance values.

EXHAUST THERMISTOR RESISTANCE

TEMP.F (C)

RES.k

TEMP.F (C)

RES.k

50 (10) 19.022.0 80 (27) 8.510.5

60 (16) 14.816.8 90 (32) 6.88.8

70 (21) 11.513.5 100 (38) 5.07.0

If the thermistor resistance does notagree with table, replace the exhaustthermistor.

If the thermistor resistance checksagree with the measurements in thetable, replace the machine controlelectronics.

TEST #3b Thermal FuseELECTRIC DRYER: The thermal fuse iswired in series with the dryer drive motor.

GAS DRYER: The thermal fuse is wired inseries with the dryer gas valve.

ALL DRYERS:


2. Access the thermal fuse by firstremoving the toe panel. See Removingthe Toe Panel, page 10; and for thermalfuse location see figure 11, page 7.

3. Using an ohmmeter, check thecontinuity across the thermal fuse. Seefigure 11 for location.

If the ohmmeter indicates an opencircuit, replace the failed thermalfuse.

TEST #3c Thermal Cut-OffIf the dryer does not produce heat, checkthe status of the thermal cut-off.


2. Access the thermal cut-off by firstremoving the toe panel. See Removingthe Toe Panel, page 10.

3. Using an ohmmeter, check thecontinuity across the thermal cut-off.See figure 11, page 7 for location.

If the ohmmeter indicates an opencircuit, replace the failed thermalcut-off and high limit thermostat. Inaddition, check for blocked orimproper exhaust system, or failedheat element (electric dryer).

TEST #3d Gas Valve, GasDryer Only1. Unplug dryer or disconnect power.

2. Access the gas valve by removing thetoe panel. See Removing the ToePanel, page 10.

3. Use an ohmmeter to determine if agas valve coil has failed. Removeharness plugs. Measure resistanceacross terminals. Readings shouldmatch those shown in the followingchart. If not, replace coil.

Terminals Resistance1 to 2 1365 251 to 3 560 254 to 5 1220 50

IMPORTANT:Be sure all harnesswires are looped backthrough the strainrelief after checking orreplacing coils.

TEST #4 Moisture SensorNOTE: This test is started with themachine completely assembled.

This test is performed when an automaticcycle stops too soon, or runs much longerthan expected.

NOTE: Dryer will shut down automaticallyafter 2 hours.

The following items are part of this system:

Harness/connectionMetal sensor stripsMachine control electronics. See ESDinformation, page 1.

1. Activate the diagnostic test mode andadvance past saved fault codes. Seeprocedure on page 1.

2. Open the dryer door. The dryer willbeep and an alphanumeric numberwill be displayed.

3. Locate the two metal sensor strips onthe face of the lint screen housing.Bridge these strips with a wet cloth orfinger.

If a beep tone is heard and analphanumeric number is displayedon the console, the sensor passesthe test. Go to step 9.

If a beep tone is not heard, or acontinuous beep tone is heard

before bridging the moisture strips,continue with step 4.

NOTE: Over drying may be caused bya short circuit in the sensor system.

4. Access the moisture sensor wires byremoving the toe panel. See Removingthe Toe Panel, page 10. Disconnect thesensor wires from the harness. Seefigure 12.

5. Access the machine controlelectronics. See Accessing &Removing the Electronic Assemblies,page 10. Remove connector P13 fromthe circuit board. Check the mainharness connections between thesensor harness and machine controlfor a short or open circuit.

Replace the main harness ifnecessary.

If harness is OK, continue with step 6.

6. Access the moisture sensor byremoving the toe panel. See Removingthe Toe Panel, page 10. Disconnect thesensor from the wire harness. Seefigure 12.

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

If a small resistance is measured,check for debris across moisturestrips inside of the drum; clean ifdebris is present. If debris is notpresent, replace sensor harness.

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

BlowerHousing

Drum

FRONT

HarnessConnection

MOVs(Metal Oxide

Varistors)

Figure 12. Disconnect sensor from wireharness.



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

If a resistance less than infinity ismeasured, replace the sensorharness.

9. If moisture sensor diagnostic testpasses, check the thermistor: PerformTEST #3a, page 7.

If the problem persists afterreplacing the moisture sensor andthermistor, replace the machinecontrol electronics.

TEST #4a AdjustingCustomer-Focused DryingModesNOTE: If the customer is complainingabout the clothes being damp and themoisture sensor passes TEST #4, step 3,the total dry time can be lengthened bychanging from a 1 (standard auto cycle)to a 2 (15% more drying time) or 3(30% more drying time) auto cycle.

1. Activate the diagnostic test mode, andadvance past saved fault codes. SeeActivating the Diagnostic Test Mode,page 1.

2. In diagnostic test mode, press and holdthe Dryness Level button for 5seconds. The dryer will beep and thecurrent drying mode will be seen onthe display. The factory default valueis 1.

3. To select a different drying mode, pressthe Dryness Level button again. Thedryer display will flash and show 2, 3,or 1.

4. With the display flashing the selectedauto cycle mode, press the STARTbutton to save the drying mode andexit diagnostics (the START button inthis mode does not start a dryingcycle). The result will be stored inEEPROM of the control board, and willbe retained after a power loss.

5. Press the STOP button at any time tocancel changes and exit from thismode.

TEST #5 Buttons andIndicatorsThis test is performed when any of thefollowing situations occurs during theConsole Buttons and IndicatorsDiagnostic Test, page 1:

None of the indicators light up No beep sound is heard Some 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 verifysupply connections.

3. Perform steps in Accessing andRemoving the Electronic Assemblies,page 10 and visually check that the P5connector is inserted all the way intothe machine control electronics.

4. Visually check that the consoleelectronics and housing assembly isproperly inserted into the frontconsole.




8. If indicators still do not light, themachine control electronics has failed:




Perform the Console Buttons andIndicators Diagnostic test, page 1 toverify repair.

No beep sound is heard:1. Perform steps in Accessing and

Removing the Electronic Assemblies,page 10 and visually check that the P5connector is inserted all the way intothe machine control electronics.

If visual check passes, replace theconsole electronics and housingassembly.



4. If replacing the console electronicsand housing assembly failed:





Some buttons do not lightindicators:1. Perform steps in Accessing and

Removing the Electronic Assemblies,page 10 and visually check that theconsole electronics and housingassembly is properly inserted into thefront console.

If visual check passes, replace theconsole electronics and housingassembly.


3. Perform the Console Buttons andIndicators Diagnostics test, page 1 toverify repair.

TEST #6 Door SwitchActivate the diagnostic test mode asshown on page 1, and perform the DoorSwitch Diagnostic test, page 2.Functionality is verified with a beep eachtime the door is closed and opened, andan alphanumeric number appears in thedisplay (i.e., 0E, 09).

If any of the above conditions are not met,or if one of the dryer model codes listedabove is displayed when the door isclosed:


Check that the wires between thedoor switch and machine controlelectronics are connected. Seefigure 13 for switch location, and seeAccessing and Removing theElectronic Assemblies, page 10.

If the connections are OK, replacethe wire and door switch assemblyand retest.

If wire and door switch assemblyhave been replaced and dryer stilldoes not start, replace the machinecontrol electronics.

Door Switch

Figure 13. Door switch location.



REMOVING THE TOE PANEL1. Unplug dryer or disconnect power.

2. Remove two screws below the toepanel.

3. Slide the toe panel down, then pull itout from the bottom. See figure 14.

ACCESSING & REMOVINGTHE ELECTRONICASSEMBLIESThere are two electronic assemblies; theConsole Electronics and Housing, andthe Machine Control Electronics. Seefigure 15.


2. Remove the two rear screws from thetop panel, and slide the top panel tothe rear to remove.

Accessing the Machine ControlElectronics

1. After locating the machine controlelectronics, remove the two screws thathold the machine control electronicsbracket in place.

the machine control electronics andslide the assembly to the front, then lift.

Accessing the Console Electronicsand Housing Assembly

1. Access the machine control electronics(see Accessing the Machine ControlElectronics at left) and disconnect theP5 ribbon cable.

2. The console panel must be removed toaccess the console electronics andhousing assembly. Remove the knobfrom the front of the console panel.

3. The console panel has two locking tabson the left and right rear, one lockingtab on the bottom (hidden), and threesnap releases across the top. Seefigure 18. Press the locking tab on theright rear, and gently rotate the consolepanel up as you pull the top free of thethree snap releases, finally pressing thelocking tab on the left, and lift theconsole panel off.

2. Slide the bracket over the top of thedrum to access the machine controlelectronics connectors and mountingscrew. See figure 16.

Removing the Machine ControlElectronics

1. Remove all the wire connections to themachine control electronics. Seefigure 17.

2. Remove the screw holding the machinecontrol electronics assembly to themounting bracket. See figure 16.

3. There are two plastic legs on the frontof the machine control electronics thatslide under the mounting bracket.

There is one plastic leg on the rear ofthe machine control electronics thatslides under the mounting bracket.

There is a locking tab on the bottomof the machine control electronicsthat snaps into the mounting bracket.

Press the locking tab on the bottom of

P9

1

5

1P8

P14

P2

3

11

6

P4

1

1

8

3

P5

P31

P13

1

P/N XXXXXX Rev XDate CodeYDDD-xx

XXXX-XXXMADE IN COO

N.O.Black

COMRed

HeaterRelay 1

MotorRelay

TanBlack-White

WhiteGreen-Yellow

Open

Lt. Blue Black Yellow-Red

Open

Open (Elec.)Orange (Gas)

Red-White

Red-White

Figure 17. Machine control electronics.

Flange

Figure 14. Pull the toe panel down toclear flange, then pull panel out.

FRONT

Machine ControlElectronicsAssembly

Console Electronicsand Housing Assembly

(inside)

Figure 15. Locate the electronicassemblies.

FRONT

Machine ControlElectronics

Bracket

Machine ControlElectronicsAssembly

MountingScrew

Figure 16. Remove machine controlelectronics from mounting bracket.

LockingTabs

Snap Releases


(inside)

Figure 18. Remove the console panelto access the console electronics andhousing assembly.



Removing the Console Electronicsand Housing Assembly

The console electronics and housingassembly is held to the console panel byseven locking tabs. Press each of thelocking tabs while gently lifting the consoleelectronics and housing assembly out ofthe console panel. See figure 19.

REMOVING THE BACKPANEL1. Unplug dryer or disconnect power.

2. Remove the two rear screws from thetop panel, and slide the top panel tothe rear to remove.

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

4. Remove the metal spring clip betweenthe back panel and the exhaust outlet.See figure 20.

5. Remove the ten screws on the rear,and two screws on the top of the backpanel. Pull the back panel off themachine. See figure 20.

ELECTRIC DRYER: In addition to theabove, remove the terminal block from theback panel.

Ground Screw Cover Plate

Metal Spring Clip

Figure 20. Remove 12 screws.


Figure 19. Locate seven locking tabs.

01/06 FOR SERVICE TECHNICIANS USE ONLY PART NO. 8572745 REV. A


SOFTWARE COPYRIGHTED.MANUFACTURED UNDER ONE OR MORE

OF THE FOLLOWING U.S. PATENTS:

4669200470049547545564840285486536648994644908959

4989347506605055601205809828602069860474866199300

6446357659714466042986685241673244767846736819255

D314261D314262D457991D457992D495453

8572745.pdf 110.87562601

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