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©2001 Maytag Appliances Sales Company

16010486

(16008373-05)

16008373-05

Attached is Supplement five for service manual 

16008373

.

This Maytag Washer Service Manual supplement covers 

Models MAH5500B and

MAH7500

.  The following information is supplemental to the information found in the

basic manual part number 

16008373

.  Please refer to this manual for detailed service

information.

We suggest you file this with your 

16008373

 Manual for reference.

MAYTAG

New Century

Neptune Washer

Service Manual

Supplement

Содержание MAH5500B

Страница 1: ...vice Manual supplement covers Models MAH5500B and MAH7500 The following information is supplemental to the information found in the basic manual part number 16008373 Please refer to this manual for detailed service information We suggest you file this with your 16008373 Manual for reference MAYTAG New Century Neptune Washer Service Manual Supplement ...

Страница 2: ...le this with your 16008373 Manual for reference Models covered in this manual supplement MAH5500B MAH7500A CONTENTS SECTION 1 GENERAL INFORMATION 1 1 SECTION 2 WASHER CONTROLS OVERVIEW 2 1 SECTION 3 DIAGNOSTIC HELP CODE TABELS 3 1 SECTION 4 ELECTRICAL COMPONENTS TESTING 4 1 SECTION 5 TEARDOWN WIRING INFORMATION 5 1 For additional information on material covered in this manual including safety issu...

Страница 3: ... 2001 Maytag Appliances Sales Company 16010486 16008373 05 Revised 02 01 iv ...

Страница 4: ...T A W e s o h t e l n i t a m c g k 4 4 8 6 0 1 I S P 0 2 1 0 2 e b d l u o h s e r u s s e r p r e t a W s e h t o l c h t i w s e i r a v s n o l l a g 5 2 y l e t a m i x o r p p a s i e g a s u r e t a w l a t o T n o i t c e n n o c m a e s r a e r e h t r a e n d e r u s a e m s e h t o l c o n h t i w t e k s a b n i p s e h t n i l l i f r e t a W d a o l t e k s a b n i p s e h t f o s e ...

Страница 5: ...ergent should be used 1 The wash cycle is selected and started by user by pressing Start Pause button 2 The door lock mechanism is verified by locking it and unlocking it The door is left unlocked 3 The drain pump will turn on energized for a short period of time 4 The water fill will begin after a delay from the time the pump is turned off The temperature of the water entering the tub depends on ...

Страница 6: ... u Q f l l a f o s s e l d r a g e r s n o i t c e l e s c i r b a f m p r 1 5 t a 3 7 Note 7 3 means 7 seconds on 3 seconds off reverse direction and repeat Basic Tumble Patterns e s n i R s n o i t c e l e S e m i T g n i l b m u T r o l a m r o N a n i a t s o n t h g i L s e t u n i m 3 e s n i R t s 1 s e t u n i m 3 e s n i R d n 2 s e t u n i m 3 e s n i R a r t x E s e t u n i m 3 e s n i ...

Страница 7: ...o u n i t n o c n O e l c y c ON OFF SEQUENCE OF PUMP DURING SPIN CYCLE The water temperature entering the washer during rinse is tempered The following table shows the temperature based on the user selections k c i u Q y v a e H a r t x E t h g i l r o l a m r o n y v a e h d e t c e l e S n o i t p O d e t c e l e S e r u t a r e p m e T e s n i R n i a t S e l c y C r e t a w e s n i R e r u t ...

Страница 8: ...p The control displays the estimated time remaining in the cycle The control panel detects hose reversal and changes the fills as necessary The control panel stores codes to aid the service person in diagnostics Figure 1 Features of MAH5500B LED Washer A membrane switch keyboard with an embedded LED display The user can select a delay start The wash rinse temperatures and wash cycles are remembere...

Страница 9: ...rson wants to run the washing machine at night or some other time to better suit the needs of the household The consumer can select the time delay from 1 hour to 9 hours in increments of 1 hour The user shall press the delay button for each 1 hour increment Holding down the delay wash key will advance through the one hour increments to off and start over again The delay time in hours shall be show...

Страница 10: ...ed and the wash level LED will return to being on constant Changing Selections Fabric temperature and options selections may be changed at any time The current cycle step will be suspended and the appropriate cycle step will be restarted with the new selections The machine will not stop but rather the changes will be dynamic The main Wash Keys may be changed at any time The cycle time remaining is...

Страница 11: ... the high level provides an indication to the machine control as to whether the high water level has been reached When the water level switch is satisfied the pressure switch circuit is opened and power for the water valves is no longer passed through the machine control Figure 2 TEMPERATURE SENSOR INPUT A thermistor is located in the water valve to monitor the blended incoming water temperature T...

Страница 12: ...S DEFINED DOOR LOCK UNLOCK SOLENOID OUTPUT The Door Lock Unlock Solenoid Output signal is a 60 millisecond pulse sent to a solenoid in the door lock assembly The solenoid is attached to a lever which moves a slider in the mechanism to lock the door after it has been closed and the cycle started The solenoid has two coils one for locking and one for unlocking when a pulse is directed to specific te...

Страница 13: ...door is open 3 During the Bleach fill 4 Energy Saver on DOOR LOCKED LIGHT OUTPUT The Door Locked Light Output signal powers a LED on the membrane pad switch of the LED washer This output is energized when the washer door is locked VDC REFERENCE VOLTAGE OUTPUT The VDC Outputs are a reference voltage for many of the signal outputs On the machine control the VDC outputs are 24 VDC referenced from P2 ...

Страница 14: ... clothes in an attempt to redistribute them in a more uniform manner so that vibration is reduced The machine control commands a distribution profile speed ramp from 0 rpm to 85 rpm at the beginning of each high speed above 100 rpm spin When the washer reaches 85 rpm the machine control monitors the Tach Input to determine if the speed varies through one revolution of the spinner basket If it sens...

Страница 15: ... microswitch MISCELLANEOUS 2 A 60 milliseconcd 120 VAC impulse from the machine control board to the lock solenoid extends the push rod of the solenoid and moves the lock lever to the right only to lock the door The lock lever in turn is engaged with the slider and slides the slider toward the door lock mechanism and inhibits the door lock mechanism from releasing the door lock hoop of the door 5 ...

Страница 16: ...iately after the Start Pause key has been pressed When a power loss occurs during the final spin of a main wash cycle the cycle will end on the MAH5500B The MAH7500A will finish the spin cycle Power up after a power loss during service mode continuous mode or advertising mode will cancel these modes These modes will not resume after the power up until the user selections are pressed again If a pow...

Страница 17: ...ontrol will time out and return to Advertising Mode and the adver tising sequence will begin again Any settings or changes that the user has made while in the interactive mode will not be remembered SERVICE MODE The service mode provides service person nel the ability to verify the operation of the washing machine The service mode can be entered at any time While in the service mode the servicer c...

Страница 18: ... T t s a F n i p S t s e T n i p S k c i u Q l i o S t h g i L n o i s i v e R e r a w t f o S s y a l p s i D r e b m u N s e t a c i l e D e l c y C e c i v r e S k c i u Q e s n i R t s e T t u p t u O d r a o B e l c y C n i a t S s e d o C p l e H k a o s e r P s e d o C c i t s o n g a i D h s a W d n a H s t s e T t u p n I d r a o B Membrane Pad Check While in service mode pressing the wri...

Страница 19: ...UICK SERVICE CYCLE Pressing the delicates key will start a quick service cycle This will be a quick check of all systems The following steps will be followed 1 Energize the cold and bleach Fill to Low level then turn bleach and cold off 2 Energize the hot and fabric softener Fill to high level then turn all valves off 3 Tumble using 7 3 tumble pattern for 12 sec 4 Lock the door 5 Turn the drain on...

Страница 20: ...P h c t a L d e k c o l n U 0 L d e k c o L 1 L e e r F e l k n i r W r e t a W h g i H l e v e L l e v e L w o l e B 0 l e v e L e v o b A 1 h s a W d n a H r e t a W w o L l e v e L l e v e L w o l e B 0 _ l e v e L e v o b A 1 _ n w o D p m e T e c n a l a b n U t i u c r i C d e c n a l a B 0 u d e c n a l a b n U 1 u p U p m e T r e t a W e r u t a r e p m e T F s e e r g e D n i p S n o i t ...

Страница 21: ...y or opens the door See the table for specific actions or references to where the proper action is defined Accessing Diagnostic Codes After the machine is in the service mode pressing presoak key will display a d and turn the LED on above the presoak key The diagnostic codes can be viewed by using the arrow keys The down arrow will go down the list The first time the down arrow key is pushed the n...

Страница 22: ... 1 2 3 4 exit service mode service test RPM torque unbalance system check Service Tests user interface test quick spin test system check service cycle advance to next step exit service tests User Interface Test exit user interface test Touch the four corners and center of the touch screen in any order center lower left lower right upper left upper right Service Tests The service tests are identica...

Страница 23: ...ge for 2 seconds and then resume normal display mode This is done as soon as the membrane switch test is complete This is a visual test only Service Cycle The service cycle can be run during a wash spin cycle or can be used to initiate a particular cycle in the washer To access this select service cycle in the Service Mode User Interface Test exit user interface test Touch screen test passed Press...

Страница 24: ...hm will apply but it can be skipped Plaster detection will default to disabled but can be enabled Quick Spin Test enable plaster unbalance detection Press start quick spin test or start pause button to begin quick spin test skip tuning algorithm cancel exit quick spin test start quick spin test Quick Spin Test cancel cycle cancel exit quick spin test The following will be displayed during the quic...

Страница 25: ...gle various components On Off At the same time the screen will display the current status of the component inputs to the control board If the washer is already running a cycle and the system check is activated then the screen will display the status of all the outputs and inputs to the control board Cancel exit quick spin test this returns you to the service tests screen Cancel cycle This will sto...

Страница 26: ... D w o l S l e v e l r e t a w w o L e r u s s e r p f o s t c a t n o c s a n e e s t o n h c t i w s f o d n e t a g n i t t e s e r e l c y c n i a r d m e t s y s n i a r d d e t c i r t s e r r o f k c e h C p m u p r o e s o h n i a r d d e g g u l p d e k n i k y a M n o i t c n u f r e p o r p r o f p m u p k c e h C 1 0 e d o c c i t s o n g a i d e e s 8 0 r o t o r d e k c o l e n O e h...

Страница 27: ... o b l o r t n o C e u q r o t r o t o m g n i p p o r d s n o i t a u t c u l f s g n i d a e r e u q r o t n i t n e g r e t e d E H n o n t n e g r e t e d h c u m o o T d e s u g n i e b r o s s e r p p u s s d u s h t i w f o t n u o m a l a m i n i m h t i w s e h t o l c g n i h s a w e r u s a e m l a m r o n h t i w t n e s e r p s l i o s t n e g r e t e d f o t n u o m a 4 3 r e w o p h...

Страница 28: ... y l d e t c e p x e n u g n i r u d t n e s e r p k c o l n u d e s u a p s a w e l c y C h c a t e h t e s u a c e b e h t n e h w d e r r u c c o s a w l o r t n o c r o t o m g n i r u d d e r e w o p t s e u q e r k c o l n u c i t s o n g a i D o t r e f e R y l n o e v i t a m r o f n I y l n O D C L 2 6 e d o c 4 4 g n i k c o l n U s t p m e t t a d e w o l l a s i d h c a t e s u a c e b...

Страница 29: ... L s t c a t n o c h c t i w s e r u s s e r P d r a o b l o r t n o c d a B 4 0 o t s l i a f r o o d e h T k c o l k c o l o t d e l i a f r o o D s t p m e t t a 1 1 r e t f a L F y a l p s i d l l i W D E L k c o l t o n l l i w r e h s a w y a l p s i D D C L r o f k c e h C d i o n e l o s k c o l r o o d y t l u a F s n o i t c e n n o c e r i w e s o o L h c t i w s k c o l r o o d y t l u...

Страница 30: ... a p e n a r b m e m m r o f r e P 1 d a p e n a r b m e m w e l o s n o c e c a l p e R 2 y r a s e c e n f i y l b m e s s a 6 1 t o n d e e p s h g i H o t e u d d e v e i h c a e u q r o t r o t o m h g i h t n e w r e v e n d e e p S g n i r u d m p r 0 0 4 r e v o e l c y c h s a w n i a m a x a m e h t e s u a c e b r o f n e e s s a w e u q r o t g n o l o o t r o f k c e h C s d u s e v i...

Страница 31: ...F 3 2 o t d e l i a f r o o D k c o l n u d e k c o l s i k c o l r o o D o t s e i r t r e s u a d n a e l c y c a t r a t s h c t i w s e s n e s k c o l r o o d y t l u a F d i o n e l o s k c o l r o o d y t l u a F 4 2 d e e p s r e v o r o t o M s i l a n g i s h c a t r o t o M m u m i x a m t a n e e s d e e p s d r a o b l o r t n o c r o t o m e c a l p e R 1 5 2 l a n g i s h c a t r o ...

Страница 32: ... 2001 Maytag Appliances Sales Company 3 7 16010486 16008373 05 Revised 2 01 Section 3 Teardown Wiring Information GENERAL COMPONENT EXPLODED VIEW Component Identification Location ...

Страница 33: ...ls between the first rinse and the final rinse Fill water valve This is a Cold water valve or a Hot water valve Final Rinse This is the last rinse of the cycle just preceding the final spin portion of the cycle Glossary of Terms First Rinse This is the first rinse following the main wash portion of the cycle Key Any Membrane switch or touchscreen keypad Key press Any membrane switch key press or t...

Страница 34: ...he process of rotating the clothes in one direction for a time pausing for a period and then reversing direction and repeating this action The speed of the spinner is slow enough so that the clothes are being tumbled i e lifted out of and dropped back into the water detergent solution Tumble Flush This is a tumble at a higher tumble speed than normal while the machine is filled with water The purp...

Страница 35: ... 2001 Maytag Appliances Sales Company 3 10 16010486 16008373 05 Revised 2 01 Section 3 Teardown Wiring Information ...

Страница 36: ... thermistor has been relocated on the valve to the outlet of the valve See Figure 4 1 The thermistor is on NTC and will drop in resistance when the temperature increases 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 ...

Страница 37: ...machince control board outputs can be verified by placing the washer into the Service Mode and performing a Board Output Test See Section 2 Service Mode Board Output Test Machine Control The machine control microprocessor board is located in the control console mounted to the plastic console The board receives input from the membrane pad touch screen door lock switches and the unbalance switches T...

Страница 38: ...P 2 8 P C A V 0 2 1 r o t s i m r e h t p m u S 3 5 P 4 5 P C D V r o t s i m r e h t e e s e c i v e d C T N D C L 8 4 e g a p t r a h c e r u t a r e p m e t s m h o K 8 1 K 3 y l n o l e d o m M W P e u q r o T 2 2 P 3 2 P C D V 4 2 r o t s i m r e h t e v l a v r e t a W 6 3 P 7 3 P C D V 5 s m h o K 5 8 K 0 1 n o i t p i r c s e D r o t c e n n o C r e b m u N n i P r o t c e n n o C r e b m ...

Страница 39: ...7 P k c a B 3 7 P 6 7 P e s u a P t r a t S 3 7 P 7 7 P f f O 4 7 P 7 7 P p l e H 4 7 P 6 7 P d a P e n a r b m e M r e b m u N n i P r e b m u N n i P y d r u t S n o t t o C 4 7 P 0 1 7 P e e r f e l k n i r W 5 7 P 0 1 7 P s e t a c i l e D 6 7 P 0 1 7 P h s a w d n a H 6 7 P 1 1 7 P e s n i r h s a W 4 7 P 2 1 7 P e s n i r h s a W 5 7 P 1 1 7 P n i p S 5 7 P 2 1 7 P e s n i R 6 7 P 2 1 7 P k ...

Страница 40: ...control bracket Figure 4 4 Motor Control Board Removal 1 Pull the vertical tab forward and lift the front of the motor control board and slide the control forward to lift and remove the control from the bracket Figure 4 5 MOTOR CONTROL BOARD The motor control is able to determine the motor s position by monitoring the active phases in the motor This is done by sending pulse signals to the motor an...

Страница 41: ...If the motor experiences a phase problem the motor will not run Motor Motor Control Test 1 Disconnect power to the washer 2 Remove the front panel and pull the JP4 Connector from the motor control board Figure 4 6 3 Reconnect the washer power cord to supply voltage 4 Press Help and Back function to acti vate Service Mode 5 LED Washer Select Board Output Test close door or push door acturator butto...

Страница 42: ...he intent is to keep the temperature between the target main wash tempera ture and 5 F below that When the heater is off it will remain off for at least 10 sec onds and when the heater is turned on it will remain on for at least 10 seconds The heater should be turned off and will re main off when the maximum heater on time limit is reached 37 minutes or the end of the wash period is reached The he...

Страница 43: ...M r e t a W e h t n o d e s a B r o t s i m r e h T e v l a V g n i s U s t e g r a T g n i t a e H e h t n o d e s a B r e t a e H e h t r o t s i m r e h T r e t a e H s m h O x a M n i M s m h O x a M n i M h t i w h s a w d l o C a d e t c e l e s r e v a s y g r e n e C º 8 1 F º 5 6 s m h o K 2 7 K 5 6 g n i t a e H o N h t i w h s a w d l o C b d e t c e l e s e d r e v a s y g r e n e C º ...

Страница 44: ...screws securing the console to the rear cover plate Figure 5 1 3 Lay a drop cloth across the top cover of the washer 4 Grasp the top of the console and gently rock the top of the console forward away from the rear console back Note the hooked tabs on bottom of the console which engage the slots in the top cover Figure 5 2 MICROPROCESSOR BOARD REMOVAL 1 Disconnect power to the washer 2 Remove the c...

Страница 45: ...COVER PLUG The cover plug inserts into the rear of the console to fill a cavity void in the console The plug is secured to the console via a console screw mounted directly behind it The cover plug simply fills a void area in the console for cosmetic purposes only Figure 5 5 CABINET ASSEMBLY The overall cabinet assembly design is identical to the MAH4000 washer except for the revised door lock mech...

Страница 46: ... Door Lock Unlock Switch Locking Lever Solenoid Push Rod DOOR LOCK MECHANISM An Emergency Access Cord is available and is accessible by removing the dis penser bezel The nylon cord is located and pulled in a direction away from the lock area The cord is attached to the mechanical opener When the cord is pulled the opener will pivot and push the locking lever into the open positon Removal 1 Disconn...

Страница 47: ...mounting bracket By partially removing the screw the water valve can now be slid to the left and removed from the bracket Figure 5 10 6 Carefully lift the valve with the inlet hoses attached and direct the inlet hoses through the openings in the valve mounting bracket 7 The hoses can be crimped or the water shut off at the faucets Place a towel below the valve and remove the inlet hoses from the w...

Страница 48: ...BLY The pump is rated at 80 watts and mounts identically to the pump used in the MAH3000 washer The pressure switch mounting bracket is a molded part of the pump housing For removal instructions see page 6 4 in the 16008373 manual HEATER ASSEMBLY The 1000 watt heater is located in the tub cover below the door openning and above the sump area of the washer A thermistor on the heater regulates the t...

Страница 49: ...val The thermistor is press fitted into the rubber seal of the heater To remove simply push the thermistor out and reinsert the replacement thermistor SUMP COVER The sump cover is located in the lower rear area of the outer tub assembly directly above the sump area and the drain outlet The purpose of the sump cover is to cap ture the detergent dispensed into the top dispenser By capturing the dete...

Страница 50: ...liances Sales Company WIRING INFORMATION Please refer to the technical schematic packed in the control console in the washer for up to datewiringinformationfortheproductyourareservicing Theschematicsonthefollowing pages are only a general reference at the time this manual was printed MAH5500B ...

Страница 51: ...5 8 16010486 16008373 05 Revised 10 00 Section 5 Teardown Wiring Information 2001 Maytag Appliances Sales Company MAH7500 ...

Страница 52: ...Maytag Appliances Sales Company Customer Service 240 Edwards Street S E Cleveland Tennessee 37311 ...

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