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Whirlpool MAH3000 service manual Motor & Motor Control Test, Motor Phase Test

Models: MAH3000

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Motor & Motor Control Test

Motor & Motor Control Test

1.Set the timer knob into the delay incre- ments.

2.Press the push-to-start switch to start the washer in the delay mode. Confirm the delay light is ON.

3.Check for 120 VAC between the L and N terminals (black wire no.27 and white wire no. 13) on the motor control board. If not present, check wiring between the ma- chine control and the motor control boards.

4.Unplug the washer power cord. Test cord to the same board terminals.

5.Remove JP4 Interface connector wire har- ness on front end of motor control board.

6.Plug the washer power cord into a 120 VAC power source. The motor control will im- mediately execute a test routine and the motor should run, rotating the spinner at 50 rpm.

6.If the motor runs, and the spinner rotates at the proper RPM speed, the problem lies outside of the motor and motor control circuit. Disconnect power to the washer and reconnect the JP4 Interface connec- tor to the motor control.

7.If the motor does not run:

A. Check the 10-amp fuse located on the control board, either visually or with an ohm meter. If bad, completely replace mo- tor control/wire harness assembly (Figure 2-6).

B. If the fuse is functioning, visually check the six semiconductors on the heat sink for any damage. If damaged, replace mo- tor control/wire harness assembly com- plete and check motor windings for dam- age (See Drive Motor). Replace motor if necessary(Figure 2-6) .

C. If fuse and semiconductors show no visible damage, perform the motor phase test.

8.Unplug the washer power cord and re- place motor control board connector JP4 when finished.

Motor Phase Test

It is possible for the motor to still run under light loads when one of the phases of the motor is nonfunctional. One possible symp- tom would be a "growling" noise from the motor. Torque is decreased when the motor is out of phase. This could result in a cus-

Figure 2-6tomer complaint that the load is not spinning out properly or it does not tumble consistently with a large load (See Section 3: Trouble- shooting).

16008373-01

SECTION 2. ELECTRICAL COMPONENTS & TESTING 2-8

© 1998 Maytag Corporation

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Whirlpool MAH3000 service manual Motor & Motor Control Test, Motor Phase Test

Contents

Service Manual Customer ServiceWasher 16010061SAFETY PRECAUTIONS USE ONLY GENUINE MAYTAG APPROVED FACTORY REPLACEMENT COMPONENTSINTRODUCTION MAH3000Models covered in this manual Maytag Appliances Sales Company 240 Edwards Street, S.E Cleveland, TNC O N T E N T S GENERALSECTION ASSEMBLYCABINET ASSEMBLY DIAGNOSTICMOTOR DisplacementOUTER MACHINEPRE-INSTALLATION REQUIREMENTS Checkpoints for proper installationUNCRATING INSTRUCTIONS NOTE Proper installation is the responsibil- ity of the purchaserINSTALLATION GROUNDING POLARITY CHECKS CAUTION Do not cut or remove the ground- ing prong from this plugSPECIFICATIONS USE OF ADAPTERS IS NOT RECOMMENDEDWASHER CONTROLS Prior To SeriesINPUT DEFINITIONS Series 17 & LaterDOOR LOCK SWITCH INPUT END-OF-CYCLE SIGNAL INPUTTEMPERATURE SENSOR INPUT TIMER INPUTSWATER TEMPERATURE INPUTS DefinitionsOUTPUT DEFINITIONS END-OF-CYCLE SIGNAL OUTPUTSee Timer Input Charts TIMER MOTOR OUTPUTVcc REFERENCE VOLTAGE OUTPUT TORQUE OUTPUTWATER VALVE OUTPUTS CYCLE SEQUENCE DEFINITIONS 1-10DELAY Timer Motor Output and Section 2 Timer Input ChartMISCELLANEOUS Door Latch Switch Monitoring Door Lock/Spin ControlRedistribution 1-11Push-To-Start Relay Operation 1-12STARTING THE WASHER STOPPING THE WASHERCYCLE REVIEW Main Wash Time/Total Cycle Time - Minutes See Notes1-13 Diagnosis - Clothes Wet at End of SpinGENERAL COMPONENT EXPLODED VIEW 1-14SECTION 1. GENERAL INFORMATION 1998 Maytag CorporationSECTION 2. ELECTRICAL COMPONENTS & TESTING ELECTRICAL TEST EQUIPMENTDescription Part NumberELECTRICAL TESTS G r o u n d e d C o m p o n e n t sVoltage Checks Water Valve TestTimer & Console Switches Timer Input ChartsSECTION 2. ELECTRICAL COMPONENTS & TESTING T C BKey 0 = Input Signal Not Asserted1= Input t i m e rMachine Control M A C HIN E MOTOR CONTROL BOARD DRIVE MOTORMotor Harness Connector Motor Phase Test Motor & Motor Control TestMotor Windings Check 1 . Disconnect power to the washer prior to testing1 . 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 kTachometer Circuit Diagnostics PHASEWIRE COLORS RESULT/SOLUTIONUNBALANCE CONTROL SYSTEM Wire ChecksTachometer Voltage FoundTub Displacement Switch Strut Displacement SwitchTesting the Tub Displacement Switch 1 . Disconnect power to the unit Testing the Strut Displacement SwitchInertial Unbalance Switch Cabinet Vibration AbsorberCabinet Vibration Sensor Testing the Inertial Unbalance SwitchSECTION 2. ELECTRICAL COMPONENTS & TESTING 2 - 11998 Maytag Corporation 1 6 0 0 8 3 7 3 - 0SECTION 3. TROUBLESHOOTING Shuts OFF When Push-To-Start Button Re- leasedStart Line Relay Operation Runs For Five Seconds Then Shuts OFFTemperature Inputs Tumbles OnlyContinuesTo Tumble After The Wash Cycle Is Finished Third Rinse Cycle Is Always ColdDoor Leaks “Thumping” Noise In SpinTicking or Knocking Noise In Spin RF Radio Frequency InterferenceT R O U B L E S H O O T I N G SECTION 3. TROUBLESHOOTING1998 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 SECTION 3. TROUBLESHOOTING 31998 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 SECTION 3. TROUBLESHOOTING1998 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 SECTION 3. TROUBLESHOOTING 31998 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 SECTION 3. TROUBLESHOOTING1998 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 SECTION 3. TROUBLESHOOTING 31998 Maytag Corporation 1 6 0 0 8 3 7 3 - 03 - 1 T R O U B L E S H O O T I N GSECTION 3. TROUBLESHOOTING 1998 Maytag CorporationT R O U B L E S H O O T I N G SECTION 3. TROUBLESHOOTING 3 - 11998 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 SECTION 3. TROUBLESHOOTING3 - 1 1998 Maytag CorporationT R O U B L E S H O O T I N G indicators of the Quick Wash and Regular washSECTION 3. TROUBLESHOOTING 3 - 1 1998 Maytag CorporationMISCELLANEOUS INFORMATION Energy UsageWasher WattagesDisconnect power to the unit SECTION 4. CONSOLER E M O V A L VERTICAL SWITCHES Push Button HORIZONTAL SWITCHES Push-to-StartR E M O V A L R E P L A C E M E N T1 . Disconnect power to the unit TIMER REMOVALR E P L A C E M E N T SECTION 4. CONSOLE 1998 Maytag Corporation1 6 0 0 8 3 7 3 - 0 SECTION 5. CABINET ASSEMBLY DOOR ASSEMBLY & HINGESDISASSEMBLY R E M O V A LCabinet Vibration Absorber Door Latch HoopFRONT PANEL Disconnect power to the unitTOP COVER DOOR LOCK MECHANISMR E M O V A L 1. Remove the front panel See Front Panel RemovalFRONT SHROUD ASSEMBLY REMOVALTroubleshooting REMOVALHinge Removal CABINET ASSEMBLY w/REAR ACCESS PANELR E M O V A L 1998 Maytag Corporation SECTION 5. CABINET ASSEMBLY16008373-01 SECTION 6. WATER-CARRYING COMPONENTS WATER VALVEREAR REMOVAL FRONT REMOVALWATER LEVEL PRESSURE SWITCH AIR DOME HOSEREMOVAL FROM CONSOLE REMOVAL FROM OUTER TUBDISPENSER ASSEMBLY REPLACEMENT/ROUTINGNOTE Using soap and water may lead to a potential leak 1. Disconnect power to the unitPUMP ASSEMBLY FRONT WATER FLUME INJECTOR5. Disconnect the hoses attached to the dis- penser assembly procedure is not followed properlyPump Accessory Kit CLEANING THE PUMP1. Depress the locking tab on the face of the pump housing 1. Disconnect power to the unitR E M O V A L 1. Disconnect power to the unit DRAIN HOSE5. Reverse the previous steps for replacement SECTION 6. WATER CARRYING COMPONENTS 1998 Maytag Corporation16008373-01 DOOR BOOT BAFFLESSECTION 7. OUTER TUB & SPINNER ASSEMBLY R E M O V A L 1. Disconnect power to the unitOUTER TUB COVER REPLACEMENT2. Stretch the rear lip of the door boot onto the tub cover 1. Disconnect power to the unitSPIN BASKET ASSEMBLY w/BALANCE RING R E M O V A L 1. Disconnect power to the unitDRIVE PULLEY 1. Disconnect power to the unitREPLACEMENT Figure7-6SPINNER TUB SUPPORT Disconnect power to the unitREPLACEMENT R E M O V A LR E M O V A L 1. Disconnect power to the unit SEAL SYSTEMFigure7-9 OUTER TUB ASSEMBLY COUNTER WEIGHTSBEARINGS REMOVAL OF UPPER WEIGHT 1. Disconnect power to the unitSTRUT ASSEMBLY Strut Displacement SwitchINERTIAL UNBALANCE SWITCH 1. Disconnect power to the unitTUB DISPLACEMENT SWITCH 1. Disconnect power to the unit1. Disconnect power to the unit REMOVAL1998 Maytag Corporation SECTION 7. OUTER TUB & SPINNER ASSEMBLY16008373-01 SECTION 8. MOTOR DRIVE SYSTEM DRIVE BELTDRIVE MOTOR R E M O V A LMACHINE CONTROL R E M O V A L 1 . Disconnect power to the unitR E P L A C E M E N T Console RemovalMOTOR CONTROL Disconnect power to the unitR E M O V A L R e m o v a l1998 Maytag Corporation SECTION 8 . MOTOR DRIVE SYSYTEM1 6 0 0 8 3 7 3 - 0 SECTION 9. ELECTRICAL SCHEMATICS & TIMER I N F O R M A T I O N Prior to SeriesELECTRICAL SCHEMATICS SECTIONTIMER CHART - Prior to Series ELECTRICAL SCHEMATICSSECTION 1998 Maytag CorporationELECTRICAL SCHEMATIC - Series ELECTRICAL SCHEMATICSSECTION 1998 Maytag CorporationTIMER CHART - Series ELECTRICAL SCHEMATICSSECTION 1998 Maytag CorporationELECTRICAL SCHEMATIC - Series ELECTRICAL SCHEMATICSSECTION 1998 Maytag CorporationTIMER CHART - Series ELECTRICAL SCHEMATICSSECTION 1998 Maytag CorporationELECTRICAL SCHEMATIC - Series ELECTRICAL SCHEMATICSSECTION 1998 Maytag CorporationN O T E S ELECTRICAL SCHEMATICSSECTION 1998 Maytag CorporationCONTENTS SPECIFICATIONSDISPENSER ASSEMBLY WIRING INFORMATIONSECTION 1. MAH4000/MAH5500A CONTROL FACIA SECTION 2. SPECIFICATIONS SECTION 3. BASIC MACHINE OPERATION SECTION 4. WASHER CONTROLS OVERVIEWSeries 10 MAH4000 only Series 11 & LaterSECTION 5. CYCLE REVIEW Cycle Times All Wash Time/Total Wash CycleNon-Max Cotton/SturdyStain Cycle General overview of Stain CycleThe following is an example of a Stain Cycle Suds detection during stain cycleSECTION 6. GENERAL COMPONENT - EXPLODED VIEW Component Identification & Location16010199 Revised 7/00SECTION 7. ELECTRICAL INFORMATION electrical power to the unit vice repair procedures1. Discontinue power and water to the SECTION 8. WATER CARRYING COMPONENTS1. Disconnect power and water to the machine OPERATIONSee Figure RECIRCULATION PUMPNOTE Indicator mark on hose for reinstallation Removal 1. Disconnect power and water to the washerDETERGENT HOSE 3. Locate the rear mounting clip on the detergent hose in the access panel opening and slide the clip off the cabinet flange. See Figure See Figure 8-11See Figure Page SECTION 9. WIRING INFORMATION 16010199Revised 7/00 2000 Maytag Appliances Sales CompanySERIES 10 - SCHEMATIC MAH4000 only 16010199Revised 7/00 2000 Maytag Appliances Sales CompanySERIES 11 MAH4000 and MAH5500 16010199Revised 7/00 2000 Maytag Appliances Sales CompanySERIES 10 - TIMER CHART MAH4000 16010199Revised 7/00 2000 Maytag Appliances Sales CompanySERIES 11 - TIMER CHART MAH4000 & MAH5500A 16010199Revised 7/00 2000 Maytag Appliances Sales Company16008373-05 New Century Neptune Washer Service Manual SupplementMAYTAG DIAGNOSTIC/HELP CODE TABELS SECTION 4. ELECTRICAL COMPONENTS & TESTINGTEARDOWN & WIRING INFORMATION Models covered in this manual supplement MAH5500B MAH7500ARevised 02/01 160104862001 Maytag Appliances Sales Company SPECIFICATIONS SECTION 1. GENERAL INFORMATIONMAH5500B CONTROL FACIA MAH7500 CONTROL FACIAGeneral Flow Of A Complete Wash Cycle BASIC MACHINE OPERATIONCYCLE SEQUENCES Wash Time TumbleWash Selections Tumbling TimeINPUT WATER TEMPERATURE Temperaturetemperature Extra Heavy, QuickFeatures of MAH5500B LED Washer Features of MAH7500 LCD WasherSECTION 2. WASHER CONTROLS OVERVIEW BASIC CONTROL BOARD PHILOSOPHY FOR BOTH WASHERSTEMPERATURE MODE delay wash key will be locked outSIGNAL MODE DELAY MODEDISPLAY CHARACTERISTICS OPTIONS MODEPage 1-3 Extra Rinse Table Door Locked LEDPRESSURE SWITCH INPUT TEMPERATURE SENSOR INPUTDOOR LOCK SWITCH INPUT INPUT MODIFICATIONS DEFINEDDiagnostics OUTPUT MODIFICATIONS DEFINEDSTART/PAUSE INPUT TACH INPUTCYCLE SEQUENCE DEFINITIONS Main Wash Target TemperaturesWATER VALVE OUTPUTS REDISTRIBUTION BLEACH DISPENSESUDS DETECTION DOOR LOCK PHILOSOPHY MISCELLANEOUSDOOR LOCK OPERATION POWER LOSS/FAILURE SPECIAL FEATURESMAH7500A ADVERTISING MODESERVICE MODE LED WasherLCD Washer 2-10Accessing Service Mode SERVICE MODE TABLE LED WasherLED WASHER SPECIAL TESTSQUICK SERVICE CYCLE 2-12Speed Range DisplayedAccessing The Help Codes BOARD INPUT TESTHELP CODES BOARD OUTPUT TESTDIAGNOSTIC CODES Section 5 DIAGNOSTIC/HELP CODE TABLESAccessing Diagnostic Codes Clearing Diagnostic Code ListACCESSING SERVICE MODE Service TestsLCD WASHER User Interface TestsDuring a cycle Service Cycle2-16 Note This selection is valid only if a cycle is running 2-17DIAGNOSTIC/HELP CODES exit diagnostic/help codes Return toClear diagnostic codes Clear the entire list of diagnostic codes SYSTEM CHECKSection 3 DIAGNOSTIC/HELP CODE TABLES HELP CODES LISTINGHelp DescriptionHelp DescriptionTrigger Action to be TakenHelp DescriptionTrigger Action to be TakenDIAGNOSTIC CODES LISTING DiagDescription TriggerDiag DescriptionTrigger Action to be TakenDiag DescriptionTrigger Action to be TakenGENERAL COMPONENT - EXPLODED VIEW Component Identification & LocationSection 3. Teardown & Wiring Information 16010486Glossary of Terms Spin Speed - This is the speed of the washer spinner during extraction 3-10 Section 3. Teardown & Wiring Information16010486 Revised 2/01SECTION 4. ELECTRICAL COMPONENTS & TESTING ELECTRICAL TESTSGrounded Components Water Valve TestMachine Control Board Output TestINPUT/OUTPUT VOLTAGES LCD Washer INPUT/OUTPUT VOLTAGES LED WasherMembrane Pad Checks On the MAH5500B washer you can perform the Membrane Pad Check with the control console. See Section 2 Accessing Service Mode Membrane Pad CheckLCD Washer LED WasherMotor Control Access DRIVE MOTORMOTOR CONTROL BOARD Drip Shield RemovalMotor Phases Motor Drive System TestMachine Control Board Output Test Motor & Motor Control TestHEATER ASSEMBLY Heater Will Not Turn OnThermistor Temperature Chart Heating Targets UsingUser Selections Main Wash TemperingSECTION 5. TEARDOWN & WIRING INFORMATION CONSOLE REMOVALMICROPROCESSOR BOARD REMOVAL LCD MODELCONSOLE COVER PLUG CABINET ASSEMBLYDOOR LATCH HOOP DOOR LOCK MECHANISM RemovalREAR ACCESS PANEL Removal 1. Discontinue power and water to the machinePRESSURE SWITCH WATER SYSTEM COMPONENTSPUMP ASSEMBLY HEATER ASSEMBLYREINSTALLATION REMOVALSUMP COVER Thermistor RemovalREMOVAL WIRING INFORMATION MAH5500BSection 5. Teardown & Wiring Information 16010486MAH7500 Section 5. Teardown & Wiring Information16010486 Revised 10/00 2001 Maytag Appliances Sales CompanyCustomer Service 240 Edwards Street, S.E Cleveland, Tennessee Maytag Appliances Sales Company