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Maytag 16010061 Cabinet Vibration Sensor, Cabinet Vibration Absorber, Inertial Unbalance Switch

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© 1998 Maytag Corporation 2-13

16008373-01 SECTION 2. ELECTRICAL COMPONENTS & TESTING

Cabinet Vibration Sensor

The cabinet vibration sensor is mounted to the

lower left corner of the machine control

board. This is a piezo-electric strip mounted

to the machine control board. With a mass

attached to the end of the strip, the machine

controller monitors the cabinet vibration as

the machine reaches top speed. The machine

controller uses the vibration sensor to attempt

to spin the washer at the optimum speed with

the least amount of vibration. Optimum speed

changes from machine to machine due to:

changes in mass of the absorber; changes in

Cabinet Vibration Absorber

This is a tuned absorber mounted in the door.

The tuned absorber consists of a mass sus-

pended by springs tuned to vibrate at approxi-

mately 800 rpm. The mass vibrates 180 de-

grees out of phase with the vibration of the

cabinet. This cancels out much of the vibra-

tion caused by the clothes load at 800 rpm (See

Section 5: Cabinet Assembly).

Inertial Unbalance Switch

The inertial unbalance switch is located on the

upper right hand side of the outer tub, in front

of the top concrete weight. The switch con-

sists of a moving weight in the switch body

which presses against the switch contacts. If

the unbalance of the outer tub becomes too

erratic, the moving weight will open the con-

tacts in the switch. When the machine con-

troller senses the switch opening, the machine

controller will reduce the spin speed to 650,

550, or 450 rpm depending on the current

speed closest to the level spin speed (i.e. 625

rpm trip would drop to 550 rpm) (See Figure

2-12).

Testing the Inertial Unbalance Switch:

Testing of the switch may prove difficult. The

switch will not open unless the switch is

moved side to side creating a "G" force of 8 - 9

Ft. lbs.

1. Disconnect power to the unit.

2. Place ohm meter leads across the two ter-

minals of the inertial switch. Move the

switch side to side. If the contacts do not

open easily, the switch is good. If the

switch contacts are open or easily tripped,

replace the switch.

spring rate of the absorber; and changes in

the pulley-belt ratio. It can also change from

run to run due to the size of the clothes load

and type of floor. The sensor finds the opti-

mum speed on every run. The optimum speed

is between 750 and 850 rpm.

Contents

Main Page INTRODUCTION MAH3000 CONTENTSCONTENTS CONTENTSCONTENTS CONTENTS Page Page SECTION 1. GENERAL INFORMATION PRE-INSTALLATION REQUIREMENTS Checkpoints for proper installation: UNCRATING INSTRUCTIONS INSTALLATION GROUNDING POLARITY CHECKS 1998 Maytag Corporation 16008373-01 SECTION 1. GENERAL INFORMATION 1-4 Figure 1-6 SPECIFICATIONS WASHER CONTROLS Prior To Series 17 INPUT DEFINITIONS Series 17 & Later Page OUTPUT DEFINITIONS Page CYCLE SEQUENCE DEFINITIONS MISCELLANEOUS Door Latch Switch Monitoring Door Lock/Spin Control Redistribution Push-To-Start Relay Operation CYCLE REVIEW Main Wash Time/Total Cycle Time - Minutes (See Notes). T umble P attern Page SECTION 2. ELECTRICAL COMPONENTS & TESTINGSECTION 2. ELECTRICAL COMPONENTS & TESTING 2-12-1 2-12-1 2-1 ELECTRICAL TEST EQUIPMENTELECTRICAL TEST EQUIPMENT ELECTRICAL TEST EQUIPMENTELECTRICAL TEST EQUIPMENT ELECTRICAL TEST EQUIPMENT ELECTRICAL TESTS Water Valve Test Voltage Checks Wax Motor Check - Door Lock Mechanism Grounded Components Timer & Console SwitchesTimer & Console Switches 2-32-3 2-3 Timer & Console SwitchesTimer & Console Switches Timer & Console Switches Timer Input ChartsTimer Input Charts (Figure 2-2)(Figure 2-2) Key: 0 = Input Signal Not Asserted 1= Input Signal Asserted Machine ControlMachine Control 2-52-5 2-5 Machine ControlMachine Control Machine Control Page MOTOR CONTROL BOARDMOTOR CONTROL BOARD Motor ControlMotor Control (Figure 2-6). (Figure 2-6). 2-72-7 2-7 MOTOR CONTROL BOARDMOTOR CONTROL BOARD MOTOR CONTROL BOARD Motor & Motor ContrMotor & Motor Contr 2-82-8 2-8 Motor & Motor ContrMotor & Motor Contr Motor & Motor Control Tol T (See Section 3: T(See Section 3: T Motor Phase TMotor Phase T Motor Windings Check TT 2-102-10 2-10 TT Tachometer Cirachometer Cir achometer Cirachometer Cir achometer Circuit Diagnosticscuit Diagnostics cuit Diagnosticscuit Diagnostics cuit Diagnostics UNBALANCE CONTROL SYSTEMUNBALANCE CONTROL SYSTEM 2-112-11 2-11 UNBALANCE CONTROL SYSTEMUNBALANCE CONTROL SYSTEM UNBALANCE CONTROL SYSTEM Strut Displacement Switch Tub Displacement Switch Cabinet Vibration Sensor Cabinet Vibration Absorber Inertial Unbalance Switch Page SECTION 3. TROUBLESHOOTINGSECTION 3. TROUBLESHOOTING 3-13-1 3-1 SECTION 3. TROUBLESHOOTINGSECTION 3. TROUBLESHOOTING SECTION 3. TROUBLESHOOTING electrical power to theelectrical power to the Warning Warning 3-23-2 3-2 3-33-3 3-3 Page Page Page Page Page Page Page Page Page Page MISCELLANEOUS INFORMATIONMISCELLANEOUS INFORMATION MISCELLANEOUS INFORMATIONMISCELLANEOUS INFORMATION MISCELLANEOUS INFORMATION SECTION 4. CONSOLESECTION 4. CONSOLE SECTION 4. CONSOLESECTION 4. CONSOLE SECTION 4. CONSOLE VERTICAL SWITCHESVERTICAL SWITCHES 4-24-2 4-2 VERTICAL SWITCHESVERTICAL SWITCHES VERTICAL SWITCHES (Push Button)(Push Button) HORIZONTAL SWITCHESHORIZONTAL SWITCHES (Push Button)(Push Button) (Push Button) TIMER REMOVALTIMER REMOVAL 4-34-3 4-3 TIMER REMOVALTIMER REMOVAL TIMER REMOVAL Page SECTION 5. CABINET ASSEMBLY DOOR ASSEMBLY & HINGES (Figure 5-1). Figure 5-1 Cabinet Vibration Absorber (Figure 5-3) (Figure 5-2). (Figure 5-4) FRONT PANEL DOOR LOCK MECHANISM (Figure 5-7) (Figure 5-6) (Figure 5-5) (See Dispenser Assembly) FRONT SHROUD ASSEMBLY (See Front Panel & Top Cover). (Figure 5-8). (Figure 5-9). Electrical-Mechanical Troubleshooting. CABINET ASSEMBLY w/REAR ACCESS PANEL (Figure 5-11) Page SECTION 6. WATER-CARRYING COMPONENTS FRONT REMOVAL (See Front Panel & Top Cover Removal). WATER VALVE REAR REMOVAL AIR DOME HOSE REMOVAL FROM CONSOLE (See Figure 6-3). (See Console (See Figure 6-2). DISPENSER ASSEMBLY FRONT WATER FLUME INJECTOR (See Front Panel & Top Cover (See Front Shroud Assembly Removal) (See Outer Tub Cover Removal). PUMP ASSEMBLY Pump Accessory Kit DRAIN HOSE (Fig- ure 6-10). Page SECTION 7. OUTER TUB & SPINNER ASSEMBLY DOOR BOOT (See Front Panel, Top and Front Shroud Removal). (See Figure 5-6) Note the orientation ribs on the outer tub cover and the locating notches in the door boot seal lip. OUTER TUB COVER (See Front Panel, Top Cover, and Front Shroud Removal). (See Front Shroud). SPIN BASKET ASSEMBLY w/BALANCE RING (See Front Panel, Top cover, Front Shroud, Outer Tub Cover and Rear Baffle (Figure 7-4). (See Baffle (Figure 7-5). DRIVE PULLEY (Figure 7-6). SPINNER TUB SUPPORT SEAL SYSTEM (See Spinner Tub Support Removal). 7-8). (Figure 7-9). (See Front Panel). OUTER TUB ASSEMBLY BEARINGS COUNTER WEIGHTS STRUT ASSEMBLY (See Front Panel, Top Cover and Front Shroud Removal). Strut Displacement Switch INERTIAL UNBALANCE SWITCH (See Front Panel & Top Cover TUB DISPLACEMENT SWITCH Page SECTION 8. MOTOR DRIVE SYSTEMSECTION 8. MOTOR DRIVE SYSTEM SECTION 8. MOTOR DRIVE SYSTEMSECTION 8. MOTOR DRIVE SYSTEM SECTION 8. MOTOR DRIVE SYSTEM DRIVE BELTDRIVE BELT DRIVE BELTDRIVE BELT DRIVE BELT DRIVE MOTOR MACHINE CONTROLMACHINE CONTROL 8-28-2 8-2 MACHINE CONTROLMACHINE CONTROL MACHINE CONTROL MOTOR CONTROLMOTOR CONTROL 8-38-3 8-3 MOTOR CONTROLMOTOR CONTROL MOTOR CONTROL REMOVALREMOVAL Page Page Page Page Page Page Page Page Page INTRODUCTION Models covered in this manual supplement: MAH4000 MAH5500A CONTENTS 2 SECTION 1. MAH4000/MAH5500A CONTROL FACIA SECTION 2. SPECIFICATIONS SECTION 3. BASIC MACHINE OPERATION SECTION 4. WASHER CONTROLS OVERVIEW SECTION 5. CYCLE REVIEW Cycle Times: Stain Cycle: Page SECTION 7. ELECTRICAL INFORMATION &2,/:$7(59$/9( SECTION 8. WATER CARRYING COMPONENTS Page Page Page Page Page Page Page Page Page MAYTAG INTRODUCTION Models covered in this manual supplement: MAH5500B MAH7500A CONTENTS Page SECTION 1. GENERAL INFORMATION SPECIFICATIONS 1-1 1-2 BASIC MACHINE OPERATION General Flow Of A Complete Wash Cycle 1-3 CYCLE SEQUENCES Number of Rinses: Wash Time Tumble: Basic Tumble Patterns: Rinse Tumble Times: 1-4 ON/OFF SEQUENCE OF PUMP DURING SPIN CYCLE INPUT WATER TEMPERATURE SECTION 2. WASHER CONTROLS OVERVIEW Features of MAH7500 (LCD Washer): BASIC CONTROL BOARD PHILOSOPHY FOR BOTH WASHERS: Features of MAH5500B (LED Washer): USER INTERFACE SELECTIONS: (LED Washer) DISPLAY CHARACTERISTICS INPUT MODIFICATIONS DEFINED OUTPUT MODIFICATIONS DEFINED CYCLE SEQUENCE DEFINITIONS Page MISCELLANEOUS Page Page LED WASHER: Page Page DIAGNOSTIC CODES: ACCESSING SERVICE MODE Page Page SYSTEM CHECK DIAGNOSTIC/HELP CODES 3-1 Section 3: DIAGNOSTIC/HELP CODE TABLES. HELP CODES LISTING: 41)desutoN( 3-2 "FP" 054 oot tsaf 3-3 3-4 DIAGNOSTIC CODES LISTING: 3-5 3-6 Page Glossary of T erms Page Page SECTION 4. ELECTRICAL COMPONENTS & TESTING ELECTRICAL TESTS Grounded Components Water Valve Test Door Lock Test Page INPUT/OUTPUT VOLTAGES (LCD Washer) INPUT/OUTPUT VOLTAGES (LED Washer) Page DRIVE MOTOR Motor Control Access MOTOR CONTROL BOARD Page HEATER ASSEMBLY Thermistor Temperature Chart SECTION 5. TEARDOWN & WIRING INFORMATION CONSOLE COVER PLUG CABINET ASSEMBLY DOOR LATCH HOOP DOOR LOCK MECHANISM REAR ACCESS PANEL WATER SYSTEM COMPONENTS PUMP ASSEMBLY HEATER ASSEMBLY Page WIRING INFORMATION MAH5500B