INPUT/OUTPUT VOLTAGES LCD Washer | Whirlpool MAH3000 specs

INPUT/OUTPUT VOLTAGES (LCD Washer)

Description	Connector/	Connector/	Voltage	Comments
	Pin Number	Pin Number
Bleach water valve output	P1(5)	P8(2)	120 VAC

Chassis Ground	P3(1)		Ground

Cold water valve output	P1(4)	P8(2)	120 VAC	500-1K ohms

Door Lock output	P1(1)	P8(2)	120 VAC	60 millisecond pulse

Door lock switch input	P2(3)	P3(8)	24 VDC

Door switch input	P8(1)	P8(2)	120 VAC

Door unlock output	P8(3)	P8(2)	120 VAC	60 millisecond pulse

Drain pump output	P6(4)	P8(2)	120 VAC

Heater - Neutral	P6(1)	P8(1)	120 VAC	MAH7500 Only (~14 ohms)

High water level - input	P1(8)	P8(2)	120 VAC

Hot water valve output	P1(3)	P8(2)	120 VAC	500 - 1K ohms

L1 to machine control board	P6(2)	P8(2)	120 VAC

L1 to motor control	P6(3)	P8(2)	120 VAC

Lower water level - input	P2(3)	P3(5)	24 VDC

Motor control tach	P2(1)	P2(3)	24 VDC

Neutral (120 VAC)	P8(2)		Neutral

Unbalance input	P2(3)	P3(4)	24 VDC

Softener water valve	P1(6)	P8(2)	120 VAC

Sump thermistor	P5(3)	P5(4)	VDC	NTC device (see thermistor
				temperature chart - page 4-8 LCD
				model only (3K-18K ohms)
Torque PWM	P2(2)	P2(3)	24 VDC

Water valve thermistor	P3(6)	P3(7)	5 VDC	10K-85K ohms)

INPUT/OUTPUT VOLTAGES (LED Washer)

Description	Connector/	Connector/	Voltage	Comments
	Pin Number	Pin Number
Bleach water valve output	P1(5)	P8(2)	120 VAC

Chassis Ground	P3(1)		Ground

Cold water valve output	P1(4)	P8(2)	120 VAC	500-1K ohms

Door Lock output	P1(1)	P8(2)	120 VAC	60 millisecond pulse

Door lock switch input	P2(3)	P3(8)	24 VDC

Door switch input	P8(1)	P8(2)	120 VAC

Door unlock output	P8(2)	P8(2)	120 VAC	60 millisecond pulse

Drain pump output	P8(4)	P8(2)	120 VAC

(Open)	P6(2)	P8(1)

High water level - input	P1(8)	P8(2)	120 VAC

Hot water valve output	P1(3)	P8(2)	120 VAC	500 - 1K ohms

L1- machine control board	P6(1)	P8(2)	120 VAC

L1- motor control	P8(3)	P8(2)	120 VAC

Lower water level - input	P2(3)	P3(5)	24 VDC

Motor control tach	P2(1)	P2(3)	24 VDC

Neutral (120 VAC)	P6(3)		Neutral

Unbalance input	P2(3)	P3(4)	24 VDC

Softener water valve	P1(6)	P8(2)	120 VAC

Torque PWM	P2(2)	P2(3)	24 VDC

Water valve thermistor	P3(6)	P3(7)	5 VDC	(10K-85K ohms)

16010486 (16008373-05)Section 4. Electrical Components & Testing4-3

Revised 02/01	©2001 Maytag Appliances Sales Company

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Whirlpool MAH3000 service manual INPUT/OUTPUT VOLTAGES LCD Washer, INPUT/OUTPUT VOLTAGES LED Washer

Contents

16010061 Service ManualCustomer Service Washer USE ONLY GENUINE MAYTAG APPROVED FACTORY REPLACEMENT COMPONENTS SAFETY PRECAUTIONS Maytag Appliances Sales Company 240 Edwards Street, S.E Cleveland, TN INTRODUCTIONMAH3000 Models covered in this manual GENERAL C O N T E N T S DIAGNOSTIC SECTIONASSEMBLY CABINET ASSEMBLY MACHINE MOTORDisplacement OUTER NOTE Proper installation is the responsibil- ity of the purchaser PRE-INSTALLATION REQUIREMENTSCheckpoints for proper installation UNCRATING INSTRUCTIONS INSTALLATION CAUTION Do not cut or remove the ground- ing prong from this plug GROUNDING POLARITY CHECKS USE OF ADAPTERS IS NOT RECOMMENDED SPECIFICATIONS Prior To Series WASHER CONTROLS END-OF-CYCLE SIGNAL INPUT INPUT DEFINITIONSSeries 17 & Later DOOR LOCK SWITCH INPUT See Push-To-Start/Line Relay Operation TIMER INPUTSDefinitions START/STOP INPUT TIMER MOTOR OUTPUT OUTPUT DEFINITIONSEND-OF-CYCLE SIGNAL OUTPUT See Timer Input Charts WATER VALVE OUTPUTS TORQUE OUTPUTVcc REFERENCE VOLTAGE OUTPUT BLEACH DISPENSE CYCLE SEQUENCE DEFINITIONS1-10 Timer Motor Output and Section 2 Timer Input Chart 1-11 MISCELLANEOUS Door Latch Switch MonitoringDoor Lock/Spin Control Redistribution STOPPING THE WASHER Push-To-Start Relay Operation1-12 STARTING THE WASHER Diagnosis - Clothes Wet at End of Spin CYCLE REVIEWMain Wash Time/Total Cycle Time - Minutes See Notes 1-13 1-14 GENERAL COMPONENT EXPLODED VIEW Part Number SECTION 2. ELECTRICAL COMPONENTS & TESTINGELECTRICAL TEST EQUIPMENT Description Water Valve Test ELECTRICAL TESTSG r o u n d e d C o m p o n e n t s Voltage Checks T C B Timer & Console SwitchesTimer Input Charts SECTION 2. ELECTRICAL COMPONENTS & TESTING t i m e r Key 0 = Input SignalNot Asserted 1= Input Machine Control M A C HIN E Motor Harness Connector DRIVE MOTORMOTOR CONTROL BOARD Motor & Motor Control Test Motor Phase Test 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 k Motor Windings Check1 . Disconnect power to the washer prior to testing 1 . Disconnect power to the unit RESULT/SOLUTION Tachometer Circuit DiagnosticsPHASE WIRE COLORS Voltage Found UNBALANCE CONTROL SYSTEMWire Checks Tachometer Testing the Strut Displacement Switch Tub Displacement SwitchStrut Displacement Switch Testing the Tub Displacement Switch 1 . Disconnect power to the unit Testing the Inertial Unbalance Switch Inertial Unbalance SwitchCabinet Vibration Absorber Cabinet Vibration Sensor 1 6 0 0 8 3 7 3 - 0 Runs For Five Seconds Then Shuts OFF SECTION 3. TROUBLESHOOTINGShuts OFF When Push-To-Start Button Re- leased Start Line Relay Operation Temperature Inputs Tumbles OnlyContinuesTo Tumble After The Wash Cycle Is Finished Third Rinse Cycle Is Always Cold RF Radio Frequency Interference Door Leaks“Thumping” Noise In Spin Ticking or Knocking Noise In Spin T R O U B L E S H O O T I N G SECTION 3. TROUBLESHOOTING 3 1 6 0 0 8 3 7 3 T R O U B L E S H O O T I N GSECTION 3. TROUBLESHOOTING 1998 Maytag Corporation 1 6 0 0 8 3 7 3 - 0 T R O U B L E S H O O T I N GSECTION 3. TROUBLESHOOTING 3 1998 Maytag Corporation 1 6 0 0 8 3 7 3 - 0 T R O U B L E S H O O T I N GSECTION 3. TROUBLESHOOTING 1998 Maytag Corporation 1 6 0 0 8 3 7 3 - 0 3 - 1 SECTION 3. TROUBLESHOOTING 3 - 1 1998 Maytag Corporation SECTION 3. TROUBLESHOOTING 3 - 1 indicators of the Quick Wash and Regular wash Wattages MISCELLANEOUS INFORMATIONEnergy Usage Washer R E M O V A L SECTION 4. CONSOLEDisconnect power to the unit R E P L A C E M E N T VERTICAL SWITCHES Push ButtonHORIZONTAL SWITCHES Push-to-Start TIMER REMOVAL 1 6 0 0 8 3 7 3 - 0 R E M O V A L SECTION 5. CABINET ASSEMBLYDOOR ASSEMBLY & HINGES DISASSEMBLY Disconnect power to the unit Cabinet Vibration AbsorberDoor Latch Hoop FRONT PANEL 1. Remove the front panel See Front Panel Removal TOP COVERDOOR LOCK MECHANISM See Front Panel & Top Cover FRONT SHROUD ASSEMBLYREMOVAL Troubleshooting Hinge Removal CABINET ASSEMBLY w/REAR ACCESS PANEL 16008373-01 FRONT REMOVAL SECTION 6. WATER-CARRYING COMPONENTSWATER VALVE REAR REMOVAL REMOVAL FROM OUTER TUB WATER LEVEL PRESSURE SWITCHAIR DOME HOSE REMOVAL FROM CONSOLE NOTE Using soap and water may lead to a potential leak DISPENSER ASSEMBLYREPLACEMENT/ROUTING procedure is not followed properly PUMP ASSEMBLYFRONT WATER FLUME INJECTOR 5. Disconnect the hoses attached to the dis- penser assembly 7. Installation is complete Pump Accessory KitCLEANING THE PUMP 1. Depress the locking tab on the face of the pump housing 5. Reverse the previous steps for replacement DRAIN HOSE 16008373-01 Front Shroud Removal DOOR BOOTBAFFLES SECTION 7. OUTER TUB & SPINNER ASSEMBLY Shroud OUTER TUB COVERREPLACEMENT 2. Stretch the rear lip of the door boot onto the tub cover SPIN BASKET ASSEMBLY w/BALANCE RING Profile Washer Spinner Support Washer Locking Nut DRIVE PULLEYFigure7-6 1. Slide pulley on shaft 1. Reverse the previous steps SPINNER TUB SUPPORT3. Remove the drive pulley See Pulley Removal 7. Remove the shaft seal Figure Figure7-9 SEAL SYSTEM REMOVAL OF UPPER WEIGHT 1. Disconnect power to the unit OUTER TUB ASSEMBLYCOUNTER WEIGHTS BEARINGS 3. Remove the wires to the switch STRUT ASSEMBLYStrut Displacement Switch INERTIAL UNBALANCE SWITCH TUB DISPLACEMENT SWITCH 16008373-01 R E M O V A L SECTION 8. MOTOR DRIVE SYSTEMDRIVE BELT DRIVE MOTOR Console Removal MACHINE CONTROL R e m o v a l MOTOR CONTROL 1 6 0 0 8 3 7 3 - 0 SECTION SECTION 9. ELECTRICAL SCHEMATICS & TIMER I N F O R M A T I O NPrior to Series ELECTRICAL SCHEMATICS TIMER CHART - Prior to Series ELECTRICAL SCHEMATIC - Series TIMER CHART - Series 1998 Maytag Corporation ELECTRICAL SCHEMATIC - SeriesELECTRICAL SCHEMATICS SECTION 1998 Maytag Corporation TIMER CHART - SeriesELECTRICAL SCHEMATICS SECTION 1998 Maytag Corporation N O T E S WIRING INFORMATION CONTENTSSPECIFICATIONS DISPENSER ASSEMBLY SECTION 1. MAH4000/MAH5500A CONTROL FACIA SECTION 2. SPECIFICATIONS Series 11 & Later SECTION 3. BASIC MACHINE OPERATIONSECTION 4. WASHER CONTROLS OVERVIEW Series 10 MAH4000 only SECTION 5. CYCLE REVIEW Cotton/Sturdy Cycle TimesAll Wash Time/Total Wash Cycle Non-Max Suds detection during stain cycle Stain CycleGeneral overview of Stain Cycle The following is an example of a Stain Cycle Component Identification & Location SECTION 6. GENERAL COMPONENT - EXPLODED VIEW SECTION 7. ELECTRICAL INFORMATION SECTION 8. WATER CARRYING COMPONENTS electrical power to the unitvice repair procedures 1. Discontinue power and water to the See Figure 1. Disconnect power and water to the machineOPERATION NOTE Indicator mark on hose for reinstallation Removal 1. Disconnect power and water to the washer 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 8-11Page SECTION 9. WIRING INFORMATION SERIES 10 - SCHEMATIC MAH4000 only SERIES 11 MAH4000 and MAH5500 SERIES 10 - TIMER CHART MAH4000 SERIES 11 - TIMER CHART MAH4000 & MAH5500A MAYTAG New Century Neptune Washer Service Manual Supplement16008373-05 Models covered in this manual supplement MAH5500B MAH7500A DIAGNOSTIC/HELP CODE TABELSSECTION 4. ELECTRICAL COMPONENTS & TESTING TEARDOWN & WIRING INFORMATION 2001 Maytag Appliances Sales Company MAH7500 CONTROL FACIA SPECIFICATIONSSECTION 1. GENERAL INFORMATION MAH5500B CONTROL FACIA BASIC MACHINE OPERATION General Flow Of A Complete Wash Cycle Tumbling Time CYCLE SEQUENCESWash Time Tumble Wash Selections Rinse INPUT WATER TEMPERATUREExtra Heavy, Quick Selected BASIC CONTROL BOARD PHILOSOPHY FOR BOTH WASHERS Features of MAH5500B LED WasherFeatures of MAH7500 LCD Washer SECTION 2. WASHER CONTROLS OVERVIEW FABRIC MODE SIGNAL MODEUSER INTERFACE SELECTIONS LED Washer Door Locked LED DISPLAY CHARACTERISTICSOPTIONS MODE Page 1-3 Extra Rinse Table TEMPERATURE SENSOR INPUT PRESSURE SWITCH INPUTDOOR LOCK SWITCH INPUT INPUT MODIFICATIONS DEFINED TACH INPUT DiagnosticsOUTPUT MODIFICATIONS DEFINED START/PAUSE INPUT WATER VALVE OUTPUTS CYCLE SEQUENCE DEFINITIONSMain Wash Target Temperatures SUDS DETECTION BLEACH DISPENSEREDISTRIBUTION DOOR LOCK OPERATION MISCELLANEOUSDOOR LOCK PHILOSOPHY ADVERTISING MODE POWER LOSS/FAILURESPECIAL FEATURES MAH7500A 2-10 SERVICE MODELED Washer LCD Washer SPECIAL TESTS Accessing Service ModeSERVICE MODE TABLE LED Washer LED WASHER Displayed QUICK SERVICE CYCLE2-12 Speed Range BOARD OUTPUT TEST Accessing The Help CodesBOARD INPUT TEST HELP CODES Clearing Diagnostic Code List DIAGNOSTIC CODESSection 5 DIAGNOSTIC/HELP CODE TABLES Accessing Diagnostic Codes User Interface Tests ACCESSING SERVICE MODEService Tests LCD WASHER 2-16 Service CycleDuring a cycle 2-17 Note This selection is valid only if a cycle is running SYSTEM CHECK DIAGNOSTIC/HELP CODESexit diagnostic/help codes Return to Clear diagnostic codes Clear the entire list of diagnostic codes Trigger Section 3 DIAGNOSTIC/HELP CODE TABLESHELP CODES LISTING Help Action to be Taken HelpDescription Trigger Action to be Taken Trigger DIAGNOSTIC CODES LISTINGDiag Description Diag Action to be Taken Component Identification & Location GENERAL COMPONENT - EXPLODED VIEW Glossary of Terms Spin Speed - This is the speed of the washer spinner during extraction 3-10 Water Valve Test SECTION 4. ELECTRICAL COMPONENTS & TESTINGELECTRICAL TESTS Grounded Components Board Output Test Machine Control INPUT/OUTPUT VOLTAGES LED Washer INPUT/OUTPUT VOLTAGES LCD Washer On 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 Checks Drip Shield Removal Motor Control AccessDRIVE MOTOR MOTOR CONTROL BOARD Motor & Motor Control Test Motor PhasesMotor Drive System Test Machine Control Board Output Test Heater Will Not Turn On HEATER ASSEMBLY Main Wash Tempering Thermistor Temperature ChartHeating Targets Using User Selections LCD MODEL SECTION 5. TEARDOWN & WIRING INFORMATIONCONSOLE REMOVAL MICROPROCESSOR BOARD REMOVAL DOOR LATCH HOOP CABINET ASSEMBLYCONSOLE COVER PLUG DOOR LOCK MECHANISM WATER SYSTEM COMPONENTS REAR ACCESS PANELRemoval 1. Discontinue power and water to the machine PRESSURE SWITCH REMOVAL PUMP ASSEMBLYHEATER ASSEMBLY REINSTALLATION SUMP COVER Thermistor Removal MAH5500B WIRING INFORMATION MAH7500 Maytag Appliances Sales Company Customer Service 240 Edwards Street, S.E Cleveland, Tennessee