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Whirlpool MAH3000 Electrical Components & Testing, Electrical Tests, Grounded Components

Models: MAH3000

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SECTION 4. ELECTRICAL COMPONENTS & TESTING

SECTION 4. ELECTRICAL COMPONENTS & TESTING

ELECTRICAL TESTS

Warning - Always shut off electrical power to the washer before beginning any service repair procedures.

Grounded Components

When performing service diagnostics, replacements and repairs, always check to determine whether all ground wires linking panel and components are reattached if removed.

Water Valve Test

The water valve test is similar to the test outlined in the 16008373 manual, except, to check the ohm resistance of thermistor, pull the P3 wire harness connector off the machine control and locate the P3(6) and P3(7) leads in the connector on the machine control board. Note the thermistor has been relocated on the valve to the outlet of the valve. (See

Figure 4-1)

Fabric Softner

Bleach

Cold

Hot

Thermistor

4 Coil Water Valve

Figure 4-1

Door Lock Test

The door lock can be verified by the following procedure.

LED Model

1.Place the washer into Service Mode. (See Section 2; Accessing Service Mode)

2.Advance to the Board Output Test and press Max Extract to Lock the door and Extra Rinse to Unlock the door.

LCD Model

1.Place the washer into Service Mode. (See Section 2; Accessing Service Mode)

2.Select Service Tests, then Quick Spin Tests to actuate the door lock mechanism. Hit Cancel to unlock the door.

Note: The relay on the control board for the door lock mechanism is disabled if the motor control board indicates the spinner speed is > 7 RPM.

For more information related to door lock mechanism, please refer to Section 2: Miscellaneous; Door Lock Philosophy.

The thermistor is on NTC and will drop in resistance when the temperature increases.

16010486 (16008373-05)Section 4. Electrical Components & Testing4-1

Revised 02/01	©2001 Maytag Appliances Sales Company

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Whirlpool MAH3000 Electrical Components & Testing, Electrical Tests, Grounded Components, Water Valve Test, Door Lock Test

Contents

Customer Service Service ManualWasher 16010061USE ONLY GENUINE MAYTAG APPROVED FACTORY REPLACEMENT COMPONENTS SAFETY PRECAUTIONSMAH3000 INTRODUCTIONModels covered in this manual Maytag Appliances Sales Company 240 Edwards Street, S.E Cleveland, TNGENERAL C O N T E N T SASSEMBLY SECTIONCABINET ASSEMBLY DIAGNOSTICDisplacement MOTOROUTER MACHINECheckpoints for proper installation PRE-INSTALLATION REQUIREMENTSUNCRATING INSTRUCTIONS NOTE Proper installation is the responsibil- ity of the purchaserINSTALLATION CAUTION Do not cut or remove the ground- ing prong from this plug GROUNDING POLARITY CHECKSUSE OF ADAPTERS IS NOT RECOMMENDED SPECIFICATIONSPrior To Series WASHER CONTROLSSeries 17 & Later INPUT DEFINITIONSDOOR LOCK SWITCH INPUT END-OF-CYCLE SIGNAL INPUTTIMER INPUTS TEMPERATURE SENSOR INPUTWATER TEMPERATURE INPUTS DefinitionsEND-OF-CYCLE SIGNAL OUTPUT OUTPUT DEFINITIONSSee Timer Input Charts TIMER MOTOR OUTPUTTORQUE OUTPUT Vcc REFERENCE VOLTAGE OUTPUTWATER VALVE OUTPUTS 1-10 CYCLE SEQUENCE DEFINITIONSDELAY Timer Motor Output and Section 2 Timer Input ChartDoor Lock/Spin Control MISCELLANEOUS Door Latch Switch MonitoringRedistribution 1-111-12 Push-To-Start Relay OperationSTARTING THE WASHER STOPPING THE WASHERMain Wash Time/Total Cycle Time - Minutes See Notes CYCLE REVIEW1-13 Diagnosis - Clothes Wet at End of Spin1-14 GENERAL COMPONENT EXPLODED VIEWSECTION 1. GENERAL INFORMATION 1998 Maytag CorporationELECTRICAL TEST EQUIPMENT SECTION 2. ELECTRICAL COMPONENTS & TESTINGDescription Part NumberG r o u n d e d C o m p o n e n t s ELECTRICAL TESTSVoltage Checks Water Valve TestTimer Input Charts Timer & Console SwitchesSECTION 2. ELECTRICAL COMPONENTS & TESTING T C BNot Asserted Key 0 = Input Signal1= Input t i m e rMachine Control M A C HIN E DRIVE MOTOR MOTOR CONTROL BOARDMotor Harness Connector Motor & Motor Control Test Motor Phase Test1 . Disconnect power to the washer prior to testing Motor Windings Check1 . Disconnect power to the unit w i n d i n g s c h e c k S e e M o t o r W i n d i n g s C h e c kPHASE Tachometer Circuit DiagnosticsWIRE COLORS RESULT/SOLUTIONWire Checks UNBALANCE CONTROL SYSTEMTachometer Voltage FoundStrut Displacement Switch Tub Displacement SwitchTesting the Tub Displacement Switch 1 . Disconnect power to the unit Testing the Strut Displacement SwitchCabinet Vibration Absorber Inertial Unbalance SwitchCabinet Vibration Sensor Testing the Inertial Unbalance Switch2 - 1 SECTION 2. ELECTRICAL COMPONENTS & TESTING1998 Maytag Corporation 1 6 0 0 8 3 7 3 - 0Shuts OFF When Push-To-Start Button Re- leased SECTION 3. TROUBLESHOOTINGStart Line Relay Operation Runs For Five Seconds Then Shuts OFFTumbles Only Temperature InputsContinuesTo Tumble After The Wash Cycle Is Finished Third Rinse Cycle Is Always Cold“Thumping” Noise In Spin Door LeaksTicking or Knocking Noise In Spin RF Radio Frequency InterferenceSECTION 3. TROUBLESHOOTING T R O U B L E S H O O T I N G1998 Maytag Corporation 1 6 0 0 8 3 7 3 - 0SECTION 3. TROUBLESHOOTING 3 T R O U B L E S H O O T I N G1998 Maytag Corporation 1 6 0 0 8 3 7 3 - 0SECTION 3. TROUBLESHOOTING T R O U B L E S H O O T I N G1998 Maytag Corporation 1 6 0 0 8 3 7 3 - 0SECTION 3. TROUBLESHOOTING 3 T R O U B L E S H O O T I N G1998 Maytag Corporation 1 6 0 0 8 3 7 3 - 0SECTION 3. TROUBLESHOOTING T R O U B L E S H O O T I N G1998 Maytag Corporation 1 6 0 0 8 3 7 3 - 0SECTION 3. TROUBLESHOOTING 3 T R O U B L E S H O O T I N G1998 Maytag Corporation 1 6 0 0 8 3 7 3 - 0T R O U B L E S H O O T I N G 3 - 1SECTION 3. TROUBLESHOOTING 1998 Maytag CorporationSECTION 3. TROUBLESHOOTING 3 - 1 T R O U B L E S H O O T I N G1998 Maytag Corporation 1 6 0 0 8 3 7 3 - 0SECTION 3. TROUBLESHOOTING T R O U B L E S H O O T I N G3 - 1 1998 Maytag Corporationindicators of the Quick Wash and Regular wash T R O U B L E S H O O T I N GSECTION 3. TROUBLESHOOTING 3 - 1 1998 Maytag CorporationEnergy Usage MISCELLANEOUS INFORMATIONWasher WattagesSECTION 4. CONSOLE Disconnect power to the unitR E M O V A L HORIZONTAL SWITCHES Push-to-Start VERTICAL SWITCHES Push ButtonR E M O V A L R E P L A C E M E N TTIMER REMOVAL 1 . Disconnect power to the unitR E P L A C E M E N T 1998 Maytag Corporation SECTION 4. CONSOLE1 6 0 0 8 3 7 3 - 0 DOOR ASSEMBLY & HINGES SECTION 5. CABINET ASSEMBLYDISASSEMBLY R E M O V A LDoor Latch Hoop Cabinet Vibration AbsorberFRONT PANEL Disconnect power to the unitDOOR LOCK MECHANISM TOP COVERR E M O V A L 1. Remove the front panel See Front Panel RemovalREMOVAL FRONT SHROUD ASSEMBLYTroubleshooting REMOVALCABINET ASSEMBLY w/REAR ACCESS PANEL Hinge RemovalR E M O V A L SECTION 5. CABINET ASSEMBLY 1998 Maytag Corporation16008373-01 WATER VALVE SECTION 6. WATER-CARRYING COMPONENTSREAR REMOVAL FRONT REMOVALAIR DOME HOSE WATER LEVEL PRESSURE SWITCHREMOVAL FROM CONSOLE REMOVAL FROM OUTER TUBREPLACEMENT/ROUTING DISPENSER ASSEMBLYNOTE Using soap and water may lead to a potential leak 1. Disconnect power to the unitFRONT WATER FLUME INJECTOR PUMP ASSEMBLY5. Disconnect the hoses attached to the dis- penser assembly procedure is not followed properlyCLEANING THE PUMP Pump Accessory Kit1. Depress the locking tab on the face of the pump housing 1. Disconnect power to the unitDRAIN HOSE R E M O V A L 1. Disconnect power to the unit5. Reverse the previous steps for replacement 1998 Maytag Corporation SECTION 6. WATER CARRYING COMPONENTS16008373-01 BAFFLES DOOR BOOTSECTION 7. OUTER TUB & SPINNER ASSEMBLY R E M O V A L 1. Disconnect power to the unitREPLACEMENT OUTER TUB COVER2. Stretch the rear lip of the door boot onto the tub cover 1. Disconnect power to the unitR E M O V A L 1. Disconnect power to the unit SPIN BASKET ASSEMBLY w/BALANCE RING1. Disconnect power to the unit DRIVE PULLEYREPLACEMENT Figure7-6Disconnect power to the unit SPINNER TUB SUPPORTREPLACEMENT R E M O V A LSEAL SYSTEM R E M O V A L 1. Disconnect power to the unitFigure7-9 COUNTER WEIGHTS OUTER TUB ASSEMBLYBEARINGS REMOVAL OF UPPER WEIGHT 1. Disconnect power to the unitStrut Displacement Switch STRUT ASSEMBLYINERTIAL UNBALANCE SWITCH 1. Disconnect power to the unit1. Disconnect power to the unit TUB DISPLACEMENT SWITCH1. Disconnect power to the unit REMOVALSECTION 7. OUTER TUB & SPINNER ASSEMBLY 1998 Maytag Corporation16008373-01 DRIVE BELT SECTION 8. MOTOR DRIVE SYSTEMDRIVE MOTOR R E M O V A LR E M O V A L 1 . Disconnect power to the unit MACHINE CONTROLR E P L A C E M E N T Console RemovalDisconnect power to the unit MOTOR CONTROLR E M O V A L R e m o v a lSECTION 8 . MOTOR DRIVE SYSYTEM 1998 Maytag Corporation1 6 0 0 8 3 7 3 - 0 Prior to Series SECTION 9. ELECTRICAL SCHEMATICS & TIMER I N F O R M A T I O NELECTRICAL SCHEMATICS SECTIONELECTRICAL SCHEMATICS TIMER CHART - Prior to SeriesSECTION 1998 Maytag CorporationELECTRICAL SCHEMATICS ELECTRICAL SCHEMATIC - SeriesSECTION 1998 Maytag CorporationELECTRICAL SCHEMATICS TIMER CHART - SeriesSECTION 1998 Maytag CorporationELECTRICAL SCHEMATICS ELECTRICAL SCHEMATIC - SeriesSECTION 1998 Maytag CorporationELECTRICAL SCHEMATICS TIMER CHART - SeriesSECTION 1998 Maytag CorporationELECTRICAL SCHEMATICS ELECTRICAL SCHEMATIC - SeriesSECTION 1998 Maytag CorporationELECTRICAL SCHEMATICS N O T E SSECTION 1998 Maytag CorporationSPECIFICATIONS CONTENTSDISPENSER ASSEMBLY WIRING INFORMATIONSECTION 1. MAH4000/MAH5500A CONTROL FACIA SECTION 2. SPECIFICATIONS SECTION 4. WASHER CONTROLS OVERVIEW SECTION 3. BASIC MACHINE OPERATIONSeries 10 MAH4000 only Series 11 & LaterSECTION 5. CYCLE REVIEW All Wash Time/Total Wash Cycle Cycle TimesNon-Max Cotton/SturdyGeneral overview of Stain Cycle Stain CycleThe following is an example of a Stain Cycle Suds detection during stain cycleComponent Identification & Location SECTION 6. GENERAL COMPONENT - EXPLODED VIEW16010199 Revised 7/00SECTION 7. ELECTRICAL INFORMATION vice repair procedures electrical power to the unit1. Discontinue power and water to the SECTION 8. WATER CARRYING COMPONENTSOPERATION 1. Disconnect power and water to the machineSee Figure RECIRCULATION PUMPRemoval 1. Disconnect power and water to the washer NOTE Indicator mark on hose for reinstallationDETERGENT HOSE See Figure 8-11 3. Locate the rear mounting clip on the detergent hose in the access panel opening and slide the clip off the cabinet flange. See FigureSee Figure Page 16010199 SECTION 9. WIRING INFORMATIONRevised 7/00 2000 Maytag Appliances Sales Company16010199 SERIES 10 - SCHEMATIC MAH4000 onlyRevised 7/00 2000 Maytag Appliances Sales Company16010199 SERIES 11 MAH4000 and MAH5500Revised 7/00 2000 Maytag Appliances Sales Company16010199 SERIES 10 - TIMER CHART MAH4000Revised 7/00 2000 Maytag Appliances Sales Company16010199 SERIES 11 - TIMER CHART MAH4000 & MAH5500ARevised 7/00 2000 Maytag Appliances Sales CompanyNew Century Neptune Washer Service Manual Supplement 16008373-05MAYTAG SECTION 4. ELECTRICAL COMPONENTS & TESTING DIAGNOSTIC/HELP CODE TABELSTEARDOWN & WIRING INFORMATION Models covered in this manual supplement MAH5500B MAH7500A16010486 Revised 02/012001 Maytag Appliances Sales Company SECTION 1. GENERAL INFORMATION SPECIFICATIONSMAH5500B CONTROL FACIA MAH7500 CONTROL FACIABASIC MACHINE OPERATION General Flow Of A Complete Wash CycleWash Time Tumble CYCLE SEQUENCESWash Selections Tumbling TimeTemperature INPUT WATER TEMPERATUREtemperature Extra Heavy, QuickFeatures of MAH7500 LCD Washer Features of MAH5500B LED WasherSECTION 2. WASHER CONTROLS OVERVIEW BASIC CONTROL BOARD PHILOSOPHY FOR BOTH WASHERSdelay wash key will be locked out TEMPERATURE MODESIGNAL MODE DELAY MODEOPTIONS MODE DISPLAY CHARACTERISTICSPage 1-3 Extra Rinse Table Door Locked LEDTEMPERATURE SENSOR INPUT PRESSURE SWITCH INPUTDOOR LOCK SWITCH INPUT INPUT MODIFICATIONS DEFINEDOUTPUT MODIFICATIONS DEFINED DiagnosticsSTART/PAUSE INPUT TACH INPUTMain Wash Target Temperatures CYCLE SEQUENCE DEFINITIONSWATER VALVE OUTPUTS BLEACH DISPENSE REDISTRIBUTIONSUDS DETECTION MISCELLANEOUS DOOR LOCK PHILOSOPHYDOOR LOCK OPERATION SPECIAL FEATURES POWER LOSS/FAILUREMAH7500A ADVERTISING MODELED Washer SERVICE MODELCD Washer 2-10SERVICE MODE TABLE LED Washer Accessing Service ModeLED WASHER SPECIAL TESTS2-12 QUICK SERVICE CYCLESpeed Range DisplayedBOARD INPUT TEST Accessing The Help CodesHELP CODES BOARD OUTPUT TESTSection 5 DIAGNOSTIC/HELP CODE TABLES DIAGNOSTIC CODESAccessing Diagnostic Codes Clearing Diagnostic Code ListService Tests ACCESSING SERVICE MODELCD WASHER User Interface TestsService Cycle During a cycle2-16 2-17 Note This selection is valid only if a cycle is runningexit diagnostic/help codes Return to DIAGNOSTIC/HELP CODESClear diagnostic codes Clear the entire list of diagnostic codes SYSTEM CHECKHELP CODES LISTING Section 3 DIAGNOSTIC/HELP CODE TABLESHelp DescriptionDescription HelpTrigger Action to be TakenDescription HelpTrigger Action to be TakenDiag DIAGNOSTIC CODES LISTINGDescription TriggerDescription DiagTrigger Action to be TakenDescription DiagTrigger Action to be TakenComponent Identification & Location GENERAL COMPONENT - EXPLODED VIEWSection 3. Teardown & Wiring Information 16010486Glossary of Terms Spin Speed - This is the speed of the washer spinner during extraction Section 3. Teardown & Wiring Information 3-1016010486 Revised 2/01ELECTRICAL TESTS SECTION 4. ELECTRICAL COMPONENTS & TESTINGGrounded Components Water Valve TestBoard Output Test Machine ControlINPUT/OUTPUT VOLTAGES LED Washer INPUT/OUTPUT VOLTAGES LCD WasherOn the MAH5500B washer you can perform the Membrane Pad Check with the control console. See Section 2 Accessing Service Mode Membrane Pad Check Membrane Pad ChecksLCD Washer LED WasherDRIVE MOTOR Motor Control AccessMOTOR CONTROL BOARD Drip Shield RemovalMotor Drive System Test Motor PhasesMachine Control Board Output Test Motor & Motor Control TestHeater Will Not Turn On HEATER ASSEMBLYHeating Targets Using Thermistor Temperature ChartUser Selections Main Wash TemperingCONSOLE REMOVAL SECTION 5. TEARDOWN & WIRING INFORMATIONMICROPROCESSOR BOARD REMOVAL LCD MODELCABINET ASSEMBLY CONSOLE COVER PLUGDOOR LATCH HOOP Removal DOOR LOCK MECHANISMRemoval 1. Discontinue power and water to the machine REAR ACCESS PANELPRESSURE SWITCH WATER SYSTEM COMPONENTSHEATER ASSEMBLY PUMP ASSEMBLYREINSTALLATION REMOVALThermistor Removal SUMP COVERREMOVAL MAH5500B WIRING INFORMATIONSection 5. Teardown & Wiring Information 16010486Section 5. Teardown & Wiring Information MAH750016010486 Revised 10/00 2001 Maytag Appliances Sales CompanyMaytag Appliances Sales Company Customer Service 240 Edwards Street, S.E Cleveland, Tennessee