Maytag MLE2000AYW Service manual

Customer Service
TM
Washer
Service Manual
16010061
Compiled From
16008373, 16010199,
16010886 11/03
SAFETY PRECAUTIONS
This manual is to be used only by a Maytag Authorized Service Technician familiar with and
knowledgeable of proper safety and servicing procedures and possessing high quality testing
equipment associated with microwaves, gas, and electrical appliance repair.
All individuals who attempt repairs by improper means or adjustment subject themselves and
others to the risk of serious or fatal injury.
USE ONLY GENUINE MAYTAG APPROVED FACTORY REPLACEMENT COMPONENTS.
16008373-01
SAFETY PRECAUTIONS
© 1998 Maytag Corporation
INTRODUCTION
Each model will be covered separately in a section pertaining only to its control system
and internal components. Because the basic structure for all washers is the same, they
will be covered generally without regard to model.
Model(s) covered in this manual:
MAH3000
For additional information on material covered in this manual, including safety issues,
contact:
Maytag Appliances Sales Company
240 Edwards Street, S.E.
Cleveland, TN 37311
Phone: 423.472.3333
FAX: 423.478.6722
16008373-01
INTRODUCTION
© 1998 Maytag Corporation
i
CONTENTS
I N T R O D U C T I O N ........................................................................................................................................................... i
C O N T E N T S ....................................................................................................................................................................... i i
SECTION 1.
G E N E R A L I N F O R M A T I O N ...................................................................................................... 1 - 1
PRE-INSTALLATION
REQUIREMENTS ............................................................................................................ 1 - 1
U N C R A T I N G ....................................................................................................................................................................... 1 - 1
I N S T A L L A T I O N.................................................................................................................................................................. 1 - 2
GROUNDING POLARITY CHECKS ...................................................................................................................... 1-4
S P E C I F I C A T I O N S ............................................................................................................................................................. 1-4
WASHER CONTROLS ................................................................................................................................................... 1 - 5
INPUT DEFINITIONS ..................................................................................................................................................... 1 - 6
OUTPUT DEFINITIONS ............................................................................................................................................... 1 - 8
CYCLE SEQUENCE DEFINITIONS ................................................................................................................... 1 - 1 0
M I S C E L L A N E O U S ....................................................................................................................................................... 1 - 1 1
Door Latch Switch Monitoring .................................................................................................................... 1 - 1 1
Door Lock/Spin Control ................................................................................................................................... 1 - 1 1
Redistribution ......................................................................................................................................................... 1 - 1 1
Push-To-Start Relay Operation .................................................................................................................... 1 - 1 2
CYCLE REVIEW ............................................................................................................................................................. 1 - 1 3
GENERAL COMPONENT EXPLODED VIEW ............................................................................................ 1 - 1 4
S E C T I O N 2 . E L E C T R I C A L C O M P O N E N T S & T E S T I N G .................................................................. 2 - 1
ELECTRICAL TEST EQUIPMENT ........................................................................................................................ 2 - 1
ELECTRICAL TESTS ..................................................................................................................................................... 2-2
Grounded Components ..................................................................................................................................... 2-2
Voltage Checks ......................................................................................................................................................... 2-2
Water Valve Test....................................................................................................................................................... 2-2
Wax Motor Check/Door Lock Mechanism ............................................................................................ 2-2
Timer & Console Switches ............................................................................................................................... 2-3
Timer Input Charts .................................................................................................................................................. 2-3
Machine Control....................................................................................................................................................... 2-5
DRIVE MOTOR ................................................................................................................................................................... 2-7
MOTOR CONTROL BOARD ...................................................................................................................................... 2-7
Motor & Motor Control Test ............................................................................................................................ 2-8
Motor Phase Test .................................................................................................................................................... 2-8
Motor Windings Check ....................................................................................................................................... 2-9
Tachometer Circuit Diagnostics ................................................................................................ .............2-10
UNBALANCE CONTROL SYSTEM .................................................................................................................. 2 - 1 1
Tub Displacement Switch ............................................................................................................................... 2 - 1 2
Strut Displacement Switch ............................................................................................................................ 2 - 1 2
Inertial Unbalance Switch ............................................................................................................................... 2 - 1 3
Cabinet Vibration Sensor ............................................................................................................................... 2 - 1 3
Cabinet Vibration Absorber ......................................................................................................................... 2 - 1 3
CONTENTS
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© 1998 Maytag Corporation
ii
SECTION 3.
T R O U B L E S H O O T I N G ................................................................................................................ 3 - 1
DIAGNOSTIC FLOW CHARTS....................................................................................................3-4
Fills and Will Not Tumble ................................................................................................................................... 3-4
Washer Overfills ....................................................................................................................................................... 3-5
Washer Will Not Spin ........................................................................................................................................... 3-6
Machine Stalls During Spin ............................................................................................................................... 3-8
Maximum Spin Speed Is Not Reached ................................................................................................... 3-9
Wash Cycle Takes Longer Than Normal .............................................................................................. 3 - 1 0
Suds Coming Out Of Door ............................................................................................................................. 3 - 1 0
Washer Will Not Start ........................................................................................................................................ 3 - 1 1
Motor Phase Test ................................................................................................................................................. 3 - 1 2
TIMER TEMPLATE OVERLAY ............................................................................................................................. 3 - 1 3
MISCELLANEOUS
INFORMATION .................................................................................................................. 3-14
S E C T I O N 4 . C O N S O L E ............................................................................................................................................ 4 - 1
R E M O V A L ............................................................................................................................................................................. 4-1
VERTICAL SWITCHES.................................................................................................................................................. 4-2
HORIZONTAL SWITCHES .......................................................................................................................................... 4-2
TIMER
REMOVAL/REPLACEMENT.................................................................................................................... 4-3
S E C T I O N 5 . C A B I N E T A S S E M B L Y ................................................................................................................. 5 - 1
DOOR ASSEMBLY & HINGES ................................................................................................................................. 5 - 1
Cabinet Vibration Absorber ............................................................................................................................ 5-2
Door Latch Hoop ..................................................................................................................................................... 5-2
FRONT PANEL ................................................................................................................................................................... 5-2
TOP COVER ......................................................................................................................................................................... 5-3
DOOR LOCK MECHANISM ....................................................................................................................................... 5-3
FRONT SHROUD ASSEMBLY ................................................................................................................................. 5-4
CABINET ASSEMBLY W/REAR ACCESS PANEL...................................................................................... 5-5
S E C T I O N 6 . W A T E R C A R R Y I N G C O M P O N E N T S ................................................................................ 6 - 1
WATER VALVE................................................................................................................................................................... 6 - 1
WATER LEVEL PRESSURE SWITCH.................................................................................................................. 6-2
AIR DOME HOSE .............................................................................................................................................................. 6-2
DISPENSER ASSEMBLY ............................................................................................................................................. 6-3
FRONT WATER FLUME INJECTOR..................................................................................................................... 6-4
PUMP ASSEMBLY .......................................................................................................................................................... 6-4
Pump Accessory ..................................................................................................................................................... 6-5
DRAIN HOSE ....................................................................................................................................................................... 6-6
SECTION 7. OUTER TUB & SPINNER ASSEMBLY ............................................................................ 7 - 1
B A F F L E S ................................................................................................................................................................................ 7 - 1
DOOR BOOT ........................................................................................................................................................................ 7 - 1
OUTER TUB COVER ...................................................................................................................................................... 7-2
SPIN BASKET ASSEMBLY W/BALANCE RING .......................................................................................... 7-3
DRIVE PULLEY .................................................................................................................................................................. 7-4
SPINNER TUB SUPPORT ........................................................................................................................................... 7-5
CONTENTS
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©1997 Maytag Corporation
iii
SEAL SYSTEM .................................................................................................................................................................. 7-6
OUTER TUB ASSEMBLY ............................................................................................................................................ 7-7
B E A R I N G S ............................................................................................................................................................................ 7-7
COUNTER
WEIGHTS .................................................................................................................................................... 7-7
STRUT ASSEMBLY ........................................................................................................................................................ 7-8
Strut Displacement Switch ............................................................................................................................... 7-8
INERTIAL UNBALANCE SWITCH......................................................................................................................... 7-8
TUB DISPLACEMENT SWITCH ............................................................................................................................. 7-9
SECTION 8. MOTOR DRIVE SYSTEM ........................................................................................................ 8 - 1
DRIVE BELT ......................................................................................................................................................................... 8 - 1
DRIVE MOTOR ................................................................................................................................................................... 8 - 1
MACHINE
CONTROL .................................................................................................................................................... 8-2
MOTOR CONTROL ......................................................................................................................................................... 8-3
SECTION 9.
E L E C T R I C A L S C H E M A T I C S .................................................................................................. 9 - 1
Schematic Prior to Series 17 .......................................................................................................................... 9 - 1
Timer Chart Prior to Series 17 ....................................................................................................................... 9-2
Schematic Series 17 .............................................................................................................................................. 9-3
Timer Chart Series 17 .......................................................................................................................................... 9-4
Schematic Series 18 .............................................................................................................................................. 9-5
Timer Chart Series 18 .......................................................................................................................................... 9-6
Schematic Series 19 .............................................................................................................................................. 9-7
CONTENTS
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© 1998 Maytag Corporation
iv
SECTION 1. GENERAL INFORMATION
PRE-INSTALLATION
REQUIREMENTS
NOTE: Proper installation is the responsibility of the purchaser.
cause an extended fill time. Refer to the
troubleshooting section for more information regarding a solution for slow fill
situations.
Checkpoints for proper installation:
•
Properly grounded electrical outlet is required. Use 15 amp fuse or compatible
circuit breaker for electrical service.
•
Standpipe Drain System must accept 1½"
O.D. drain hose. Standpipe height of 36"
is recommended.
•
NOTE: If drain standpipe is in excess of 5 feet
above floor level, install pump accessory kit,
part number 22002136.
•
•
This unit is not equipped with a siphon
break, and the drain hose must be elevated
to a minimum height of 24". A 36" high
standpipe is recommended. For all installations the drain hose must be supported
by the drain hose strap on the back of the
washer.
Hot and Cold water faucets must be within
four (4) feet of the back of the washer. This
allows quick access for immediate water
shut off.
•
Water heater should be set to deliver a
minimum of 120ºF (49º C) hot water to the
washer.
•
Do not store or operate washer in temperatures below freezing. This can cause
damage to the pump, hoses and other
components.
•
Best performance is obtained with the
washer installed on a solid floor. Wood
floor constructions may need to be reinforced to minimize vibration from unbalanced load situations. Carpets and soft
tile surfaces are also contributing factors
to vibration and/or movement during the
spin cycle. Never install washer on a platform or weak support structure.
UNCRATING INSTRUCTIONS
NOTE: The following steps must be performed in the correct order to ease uncrating.
1.
Remove the carton by cutting only in
marked areas of the carton. CAUTION:
Hoses are connected to the washer.
2.
Carefully remove any packaging materials from the outside of the washer.
IMPORTANT: DO NOT cut the red straps
securing the power cord and inlet hoses
at this time. They will be removed later
during installation.
3.
Remove the accessory package from inside the tub.
4.
Remove the crate bottom from the washer
by removing crate bottom wire clips.
Water pressure of 20 - 120 P.S.I. is required
to fill the washer in the appropriate time
frame. Pressures of less than 20 P.S.I. may
16008373-01
© 1998 Maytag Corporation
SECTION 1. GENERAL INFORMATION
1-1
INSTALLATION
1.
Two separate red shipping straps are used
to secure the machine for shipping purposes and to secure the power cord with
the water inlet hoses. Remove the straps
in the following sequence:
A. Locate the metal buckles securing the red
straps which extend through slots in the
rear wall of the cabinet. The buckles are
positioned in the center of the red straps.
Carefully cut the red straps, and remove
the metal buckles. NOTE: Cut the straps
as close to the buckles as possible. Discard the buckles.
Figure 1-2
3.
Locate the two (2) ½" hex head shipping
bolts extending up through the bottom of
the base (Figure 1-4). The shipping bolts
are near the center of the base toward the
front of the washer. Remove both bolts,
freeing the tub and suspension. Do not
be alarmed should the tub assembly shift
when the last bolt is removed. Some shifting of the tub is normal.
Figure 1-1
B. Grasp each loose strap individually and
pull the strap to remove it from the cabinet. Discard the strap (Figure 1-2).
2.
Figure 1-3
Tip washer slightly forward. Loosen rear
leveling leg lock nuts. Tip washer back
slightly to loosen front leveling leg lock
nuts (Figure 1-3).
16008373-01
© 1998 Maytag Corporation
SECTION 1. GENERAL INFORMATION
1-2
Turn on the water and check for leaks (Figure
1-5). Note the H and C designations on the
water valve bracket for the Hot and Cold
hoses.
Figure 1-4
4.
Figure 1-5
Slide the washer into position and check
the levelness and stability of the washer.
If necessary, slide the washer out of position to either raise or lower the leveling
leg as required to level and stabilize the
washer securely on all four legs. Slide the
washer back into position to confirm levelness to the floor. When the washer is
level, tighten the locking nuts up against
the base of the washer. This will secure
the leveling legs in place.
5.
Install the rubber feet, found in the installation package, on all four (4) legs (Figure
1-3).
6.
Pull the drain hose vertically to the drain
strap . Then route the drain hose through
the drain hose strap on the back of the
washer and snap into the plastic hook of
the strap.
7.
Install gooseneck end of drain hose into
drain standpipe. Be sure the connection
is not airtight between the drain hose and
standpipe. Standpipe must be at least 24"
high. 36" height is recommended.
8.
Connect inlet hoses to water supply using screen washers (found in the installation package) at faucet connections, with
the domed screen facing the faucet. Attach hoses to the faucets and the water
valve.
16008373-01
NOTE: Accessory inlet hoses are available in
various lengths, up to 10 feet.
GROUNDING POLARITY CHECKS
The receptacle used for all Maytag products
operating on 120 Volts AC must be properly
grounded and polarized.
The power cord should be equipped with a
three (3) PRONG POLARIZED GROUNDING
PLUG FOR PROTECTION AGAINST SHOCK
HAZARD and should be plugged directly into
a properly grounded and polarized receptacle.
CAUTION: Do not cut or remove the grounding prong from this plug.
It is the responsibility of the person installing
the appliance to ensure it is adequately
grounded and polarized at the point of installation. Local conditions and requirements
should be taken into consideration. In cases
where only a two (2) prong receptacle is available, it is the personal responsibility of the
customer to have it replaced with a properly
grounded and polarized three (3) prong receptacle (Figure 1-6).
© 1998 Maytag Corporation
SECTION 1. GENERAL INFORMATION
1-3
Plug power cord into a properly grounded 120
volt AC-approved electrical service. This
must be protected by a dedicated 15 amp fuse
or circuit breaker.
All grounding and wiring should be performed
in accordance with national and local codes.
USE OF ADAPTERS IS NOT RECOMMENDED.
Figure 1-6
SPECIFICATIONS
CAPACITY
3.1 Cubic Feet
ELECTRICAL
120 volts, 60 Hz; Requir es 15 amp circuit br eaker or fused electrical
supply . Power cord must be connected to a properly grounded and
polarized outlet.
M OTOR
Sw itched Reluctance M otor contr olled by a micropr ocessor motor
contr ol board. Motor pulley ratio (motor to spinner RPM ) 14 to 1.
POWER U SAGE
Motor Input:
TUMBLER SPEED
Wash Tumble
Rinse Tum ble
High Speed Spin
WATER U SAGE
Water pressure should be 20-120 p.s.i. (1.06-8.44 kg/cm ) at inlet hose
connection. Total w ater usage is approximately 25 gallons; varies w ith
clothes load. Water fill in the spin basket w ith no clothes, m easured
near the rear seam of the spin basket.
WASH LEVEL
3-4 inches
RINSE LEVEL
4-5 inches
HOSE LEN GTHS
Four-foot inlet hoses w ith inlet washers and attaches to water valv e.
Dr ain hose attaches to pump and w ill accomm odate 36" dr ain stand
pipe.
DIMENSIONS
Cabinet dimensions: 27" (68.58cm) W x 27 ½” (69.85cm) D x 36"
(91.44cm )H .
WEIGHT (Approx.)
Uncar toned
Crated
SCREW & BOLT TORQUES
Bolt, Counter Weight
Bolt, Spin Pulley
Bolt, Belt Adjuster
Screw , Fr ont Baffle
Screw , Rear Baffle
Clamp, Hoses
Nuts, Spinner Support
Nuts, Suspension Struts
16008373-01
During Wash Tumble
During Rinse Tum ble
Top Spin
(Wattage readings taken with no clothes in
- 150 Watts
- 175 Watts
- 800 Watts
spinner.)
47-51 RPM
47-51 RPM
800 RPM (± 50 RPM based upon optim um
spin performance.)
190lb. (86kg.) Approx .
200lb. (91kg). Approx .
7in. lbs.
30in. lbs
90in. lbs
25in. lbs
18.5in. lbs
15+ in. lbs
18in. lbs
7in. lbs
© 1998 Maytag Corporation
(±
(±
(±
(±
(±
3in.lbs)
3in. lbs)
10in. lbs)
3in. lbs)
3in. lbs)
(± 3in. lbs)
(± 3in. lbs)
SECTION 1. GENERAL INFORMATION
1-4
WASHER CONTROLS
The control system in the Neptune horizontal axis washer generally consists of a timer and
microprocessor-based machine control. These receive input signals and send output signals to
other equipment in the washer, including the motor and motor control, user input switches,
user indicator lights, the door latch and lock assembly, water valves, drain pump, unbalance
switches, dispenser actuator wax motors, a pressure switch, and a tub light.
The machine control has direct control of these items:
-
Motor speed and direction, through signals to the motor control.
Door lock wax motor.
Hot and cold water valves, with an input signal from the timer and pressure switch.
Timer motor.
On Light.
In general, the timer dial is rotated to a desired setting, selects the cycles options using the
option switches, and starts the washer. The machine control reads the inputs from the timer,
option switches and pressure switch then send output signals to the motor control and other
components based upon those inputs. When the machine control has completed its set of
instructions for the specific timer setting, it energizes the timer motor output to advance the
timer to the next increment, reads a new set of input signals from the timer, and acts upon
them. This continues until the cycle is complete. (See Figure 1-7 & 1-8 for a generic representation of the Neptune washer control system.)
Prior To Series 17
Figure 1-7
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© 1998 Maytag Corporation
SECTION 1. GENERAL INFORMATION
1-5
Series 17 & Later
Figure 1-8
INPUT DEFINITIONS
DOOR LOCK SWITCH INPUT
When input is present, this is indication the
washer door is locked. The machine controller will not command the spinner to spin faster
than 50 rpm when the input is not present
prior to spin.
END-OF-CYCLE SIGNAL INPUT
The End-of-Cycle Signal Input is energized
through a user input switch on the control
panel. When this is energized and the cycle
has finished, the machine control will sound
the End-of-Cycle signal (See End-Of-Cycle Signal Output).
FABRIC SELECTION INPUTS
The Fabric Selection Inputs are energized
through a user input switch on the control
panel. The machine control reads these inputs to determine which cycles should be run
when the washer is started.
MAX EXTRACT INPUT
The Max Extract Input is energized through a
user input switch on the control panel. When
input is energized, the machine control will
modify the final spin profile to the max extract profile.
16008373-01
NOTE: If the user selects the Hand Washables
fabric selection, all spins will follow the Max
Extract profile regardless of whether the user
selects the Max Extract option.
OUT-OF-BALANCE INPUT
The Out-of-Balance Input Signal is provided
by three normally-closed switches wired in
sequence. If any of these switches opens due
to an out-of-balance condition, the signal will
be momentarily lost (See Unbalance Control
System).
PRESSURE SWITCH INPUT
The input signal from the Pressure Switch
serves two purposes. It supplies power for
the water valves and provides an indication
to the machine control as to whether the commanded water level has been reached.
When the timer advances into a cycle sequence that calls for water, power is supplied
through the timer to either the wash or rinse
level contacts on the pressure switch. When
the water level in the tub is below the full level
for that setting, the pressure switch circuit is
closed, supplying power for the water valves
to the machine control. When the water level
switch is satisfied, the pressure switch circuit
is opened and power for the water valves is
no longer passed to the machine control. The
© 1998 Maytag Corporation
SECTION 1. GENERAL INFORMATION
1-6
machine control interprets this loss of power
as an indication that the water level has
reached the full level.
When the washer is at the "full" level and the
timer is set in a Prewash Tumble, Main Wash
Tumble, Light Wash Tumble, or Rinse Tumble
increment, the machine control will begin the
sequence timing defined for each cycle and
fabric selection setting (See Cycle Sequence
Definitions).
During the drain and spin increments after the
main wash, first rinse, second rinse, and extra rinse increments, the wash side circuit in
the pressure switch is closed. When the water level drains below the wash full level, the
circuit will close and energize the pressure
switch input. The machine control interprets
this signal (not to energize the water valve
outputs) to measure how quickly the washer
is draining. If the machine control commands
a spin speed above 51 rpm before the pressure switch input is energized, it will drop the
speed to 0 rpm and hold there until the pressure switch input is energized. An additional
delay equal to the length of time elapsed will
occur before the pressure switch input is energized. If four minutes elapse without the
pressure switch input being energized, the
machine control will energize the timer motor output to advance the timer into the next
increment and continue with the cycle.
START/STOP INPUT
The start/stop input is energized by the momentary Push-to-Start/Stop Switch. If this input is energized when a cycle is in progress,
the machine control will disengage the line
relay, both water valve output signals, the door
lock wax motor signal, the timer motor output signal, and the on-light output signal. If
this input is energized when a cycle is not in
progress, the machine control will energize
the line relay and begin the cycle sequence as
defined by the timer and user input switches
(See Push-To-Start/Line Relay Operation).
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TACH INPUT
The tach input is a feedback signal from the
motor control. It provides eight pulses per
revolution of the switched reluctance motor.
The motor runs at 14 times the speed of the
spinner (14:1 belt ratio). The tach input is used
for monitoring speed and out-of-balance detection (See Tachometer Circuit Diagnostics).
If the machine control commands a motor
speed and direction but does not sense a tach
input signal within five seconds, it will disengage the line relay to stop the washer. This
generally indicates a locked rotor or a malfunction in the motor control.
If the machine control senses a tach input signal when it is not commanding the motor to
run, it will disengage the line relay to stop the
washer.
If the machine control commands a coast
down from final spin speed but is still receiving a tach input signal after two minutes, it
will disengage the line relay to stop the washer.
TEMPERATURE SENSOR INPUT
A thermistor is located in the water valve to
monitor the blended incoming water temperature. The machine control uses this input signal to regulate the water temperature with the
warm or cold wash or warm rinse temperature selections (See Water Valve Outputs).
TIMER INPUTS
The Timer Input signals are energized through
the cams in the timer. The timer operates with
a 30 second drive cycle and a 5.8 second advance time (See Timer Input Charts).
WATER TEMPERATURE INPUTS
The Water Temperature inputs are two separate signals defined by a user input switch on
the control panel. The machine control interprets these signals to determine what the water temperature should be for each fill (See
Water Valve Outputs).
© 1998 Maytag Corporation
SECTION 1. GENERAL INFORMATION
1-7
OUTPUT DEFINITIONS
DOOR LOCKED LIGHT OUTPUT
NOTE: This section applies only to washers
between Series 10 and 16. The "Door Locked"
lights on washers from Series 17 and after are
controlled by a "Door Locked" light switch.
The Door Locked Light Output signal powers
a 1/3 watt neon indicator lamp on the control
panel. This output is first energized when the
Door Lock Wax Motor Output is energized. At
the end of the cycle, it remains energized for
50 seconds after the Door Lock Switch Input
shuts down. This delay allows the wax motor
to fully retract and unlock the door.
NOTE: The washer will continue to tumble
at the end of cycle until this 50 second delay
is elapsed.
DOOR LOCK WAX MOTOR OUTPUT
The Door Lock Wax Motor Output signal powers a wax motor in the door lock assembly.
The wax motor extends to drive the door lock
system for the washer.
If the washer is started with the timer set in a
Prewash Tumble, Main Wash Tumble, or Light
Wash Tumble increment, the machine control
will wait for three minutes before energizing
the Door Lock Wax Motor Output. This delay
is not affected by water level. This output remains energized until the end of the cycle.
If the washer is started with the timer set in a
Prewash Drain, Bleach Dispense, Spin1, Rinse
Tumble, Spin2, or Spin3 increment, the machine control will energize this output immediately.
END-OF-CYCLE SIGNAL OUTPUT
The End-Of-Cycle Signal Output is an internal signal on the machine control between the
microprocessor and annunciator. The end-ofcycle signal sounds when a wash cycle is finished and the End-Of-Cycle Input is energized.
The end-of-cycle signal sounds as six pulses
in a 0.35 seconds on, 0.15 seconds off pattern
(See Timer Input Charts).
ON LIGHT OUTPUT
NOTE: This section applies only to washers
from Series 17 and after. The "Door Locked"
lights on washers between Series 10 and 16
are controlled by a cam on the timer.
The Door Locked Light Output signal powers
a 1/3 watt neon indicator lamp on the control
panel. This output is energized when the
washer is operating in a wash or spin cycle.
Note that the "On" light is not illuminated when
the timer is in a delay increment.
TIMER MOTOR OUTPUT
The machine control energizes the Timer
Motor Output to allow for variable-length
timer increments. If the washer is started with
the timer set in a Prewash Tumble, Main Wash
Tumble, Light Wash Tumble, or Rinse Tumble
increment, the machine control will not begin the cycle sequence timing until the water
level reaches the appropriate level. The Timer
Motor Output is disengaged during this time.
The machine control will stop the washer by
disengaging the line relay if the following occur: 1) The machine control energizes the
timer motor until it senses a timer change. 2)
The timer motor remains energized for five
minutes while the timer inputs change (See
Timer Input Charts).
The machine control will continuously energize the Door Lock Wax Motor Output during
the final (Spin 3) sequence until 30 seconds
before the washer begins to coast from the
final speed.
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© 1998 Maytag Corporation
SECTION 1. GENERAL INFORMATION
1-8
The machine control counts the number of
rinses during a normal wash cycle. In the first
and second Rinse Tumble increments, the
machine control will energize the Timer Motor Output as soon as the Pressure Switch Input is no longer energized, indicating that the
water has reached the full level. In the third
and fourth (if Extra Rinse is selected) Rinse
Tumble increments, the machine control will
energize the Timer Motor Output 30 seconds
after the Pressure Switch Input is no longer
asserted.
The machine control will energize the Timer
Motor Output when the timer is set into a
Spin1, Spin2, or Spin3 increment 30 seconds
before the end of the spin. It will remain energized until the timer inputs change.
TORQUE OUTPUT
The machine control commands motor speed
and direction through the Torque Output from
the machine control to the motor control.
This output is a pulse width modulated (PWM)
signal (See Section 2: Machine Control).
Vcc REFERENCE VOLTAGE OUTPUT
The Vcc Outputs are a reference voltage for
many of the signal outputs. On the machine
control, the Vcc outputs are 24 VDC referenced to the 120 VAC neutral line.
WATER VALVE OUTPUTS
The machine control determines whether the
hot or cold Water Valve Outputs should be energized during each timer increment, but it
only gates the power to the water valves, it
does not directly provide that power. When
the timer is in an increment calling for water,
power passes from the timer to the wash or
rinse level circuit in the pressure switch. When
the water level is below the full level, the pressure switch circuit is closed and the power
passes to the machine control. The machine
control gates the power to the hot and cold
Water Valve Outputs. When the pressure
switch senses that the full level is reached, the
16008373-01
circuit opens and de-energizes the Pressure
Switch Input on the machine control, which
de-energizes the Water Valve Outputs.
The machine control will read the Water Temperature Sensor Input to determine the
blended water temperature passing through
the water valve. In a warm wash fill, the machine control will first energize both the hot
and cold Water Valve Outputs for five seconds
then de-energize the cold Water Valve Output
and monitor the water temperature. When
the Water Temperature Sensor Input passes
the warm threshold (approx. 20 K Ohms), the
machine control will re-energize the cold output for the remainder of the fill.
In a cold wash fill, the machine control will
first energize only the cold Water Valve Output for five seconds. It then energizes the hot
Water Valve Output and monitors the Water
Temperature Sensor Input until it passes the
cold threshold (approx. 44 K Ohms), when it
de-energizes the Hot Water Valve Output for
the remainder of the fill.
If the user selects a warm rinse temperature,
the machine control will count the rinses and
allow a warm rinse fill only on the third and
fourth (if the user also selects the Extra Rinse
option) rinses. The first two rinses will be cold
only. The machine control does not regulate
water temperature during the rinses.
NOTE: If the user chooses the Easy Care/
Perm Press fabric selection, all rinse fills will
be cold regardless of whether the user also
selected the warm rinse temperature.
© 1998 Maytag Corporation
SECTION 1. GENERAL INFORMATION
1-9
CYCLE SEQUENCE DEFINITIONS
NOTE: Refer to Section 2: Timer Input Charts
for information on the timing of each cycle
sequence.
BLEACH DISPENSE
In a Bleach Dispense increment, the machine
control will follow the same tumble pattern
and speed as in a Main Wash Tumble increment.
D E L AY
During a Delay increment, the door Lock Wax
Motor Output, Door Locked Light Output (Series 17 and later only), Motor Torque Output,
"On" light (Series 10 to 16 only), and Water
Valve Outputs are de-energized. Note that the
Delay indicator is energized through a cam
on the timer.
washers only) will de-energize and the Endof-Cycle Signal will sound if the user had selected the End-of-Cycle Signal option.
LIGHT WASH TUMBLE, MAIN WASH
TUMBLE, and RINSE TUMBLE
The machine control will tumble the washer
at the pattern and speed defined by the Fabric
Selection Inputs (See Cycle Review). Each
tumble will start only after the previous
tumble has completely stopped. The machine
control will reverse the tumble direction after
each pause. The machine control will continue to tumble the washer until the timer inputs change.
In a Light Wash Tumble or Main Wash Tumble
increment, the machine control will de-energize the line relay if the washer continues to
tumble for 29 minutes. This would only occur if the timer were to stall (See Section 1:
Timer Motor Output and Section 2: Timer
Input Chart).
EXTRA RINSE
When the user selects the Extra Rinse option,
the spin increment following the third rinse
will follow the Spin2 cycle sequence. The
Timer Motor Output will be energized 60 seconds prior to the end of the spin cycle sequence and will remain energized to advance
the timer through the "Off" increment into the
Rinse Tumble increment.
PREWASH DRAIN
During a prewash drain increment, the washer
will tumble at the same speed and in the same
pattern as in the Prewash Tumble increment
for the fabric selection. The Door Lock Wax
Motor Output will be energized during this
increment (See Prewash Tumble).
If the Extra Rinse option is not selected, this
spin will follow the Spin3 cycle sequence and
the Timer Motor Output will be energized 30
seconds prior to the end of the final spin.
PREWASH TUMBLE
When the timer is set into a Prewash Tumble
increment, the machine control will tumble
at 51 rpm in the following tumble pattern:
IDLE
The Idle increment follows the final spin increment in each cycle. If the Door Lock Switch
Input is energized when the timer advances
into the Idle increment at the end of the cycle,
the machine control will tumble the washer
until 50 seconds after the Door Lock Switch
input is no longer energized. This allows time
for the Door Lock Wax Motor to fully retract.
At this time, the Door Lock Light Output
(washers between Series 10 and 16 only) or
the "On" Light Output (Series 17 and later
Cycle
Tumble-Pause Pattern
Cotton/Sturdy
6 sec. - 24 sec.
Easy Care/Perm Press
6 sec. - 24 sec.
Delicates
6 sec. - 24 sec.
Hand Washables
3 sec. - 27 sec.
16008373-01
© 1998 Maytag Corporation
SECTION 1. GENERAL INFORMATION
1-10
In a Prewash Tumble increment, the machine
control will de-energize the line relay if the
washer continues to tumble for 15 minutes.
This would only occur if the timer were to stall
(See Section 1: Timer Motor Output and Section 2: Timer Input Chart).
MISCELLANEOUS
Door Latch Switch Monitoring
At the end of a cycle, when the timer advances
into the Idle increment, the machine control
will keep the line relay energized until it loses
power when the door latch switch opens. This
guards against the switch contacts welding
closed. In this condition, the machine control will limit what additional cycles can be run
before the door is opened as follows:
Washers between Series 10 and 16
The machine control will allow the washer
to restart only if the user sets the timer
into a Rinse Tumble or Spin3 increment.
Washers from Series 17 and Later
The machine control will allow the washer
to restart in any setting. After that cycle
completes, the user must open the door
before the machine control will allow a
third cycle to start.
Door Lock/Spin Control
control will energize the timer motor output
until the timer inputs change so the washer
can proceed with the cycle.
At the end of spin sequence, if the door lock
switch input is de-energized before the washer
drops below 91 rpm, a hardware circuit on the
machine control will interrupt the torque output signal, which forces the motor control to
0 rpm, and energize the door lock wax motor
circuit to lock the door. This hardware circuit
will keep the door lock wax motor circuit energized until the door lock switch input signal
is energized.
Redistribution
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
senses a high enough variation in speed (suggesting an out-of-balance condition in the
clothing load), it will drop the spinner speed
to 0 rpm and force a short reverse tumble to
redistribute the clothing load before resuming the spin. If any of the out-of-balance
switches trip and open the out-of-balance input circuit at a speed below 500 rpm, the machine control will also drop the speed to 0 rpm
and force the reverse tumble to redistribute
the clothing load.
When the machine control begins a spin increment, it will not command spin speed
above 51 rpm unless the door lock switch input is energized. At the start of a spin increment, the machine control will drop the speed
to 0 rpm then tumble until the switch is energized. At that point, it will restart the spin sequence. If the door lock switch is not energized after 2 minutes of tumbling, the machine
16008373-01
© 1998 Maytag Corporation
SECTION 1. GENERAL INFORMATION
1-11
The following rules determine the maximum
number of redistribution attempts that will be
allowed in each spin step before the machine
control skips the step and continues with the
spin profile (See Section 2: Unbalance Control System).
STOPPING THE WASHER
1.
With the washer running, power is
supplied to the machine control and
washer from gray wire no. 26 through the
line relay.
2. When the user presses the push-to-start
button, a signal is sent to the machine control through red wire no. 28 telling the
washer to shut down.
3. The machine control opens the internal
logic switch which de-energizes the line
relay.
4. When the user releases the push-to-start
button, power is removed from the machine control and washer (Black wire no.
27).
Push-To-Start Relay Operation
STARTING THE WASHER
1.
2.
3.
4.
5.
With the door closed, press the push-to
start switch.
The red no. 28 wire sends a signal to the
machine control to start running.
120 VAC is supplied to the machine control board through black wire no. 27.
The machine control closes an internal
switch to energize the line relay.
When the push-to-start button is released,
power remains supplied to the machine
control and the washer from gray wire
no. 26 through the line relay.
MACHINE CONTROL BOARD
INTERNAL LOGIC
SWITCH
120 VAC POWER
FROM MACHINE
CONTROL BOARD
LINE
RELAY
NO
120 VAC LINE
(W hen door is
closed)
GY 26
C OM
BK 27
120 VAC Line
To Timer &
Motor Control Board
RD 28
PUSH TO START SWITCH
Figure 1-8
16008373-01
© 1998 Maytag Corporation
SECTION 1. GENERAL INFORMATION
1-12
CYCLE REVIEW
Main Wash Time/Total Cycle Time - Minutes (See Notes).
N on- M ax
Ex t ra c t
C ot t on/ S t urdy
E a sy C a r e /
Pe rm Press
D e lic a t e s
H a nd
W a sh a b l e s
H e a v y W a sh
2 3 .0 /4 9 . 0
2 0 .0 /4 5 . 5
20 /46.5
N o t A p p lic ab le
N o r m a l W a sh
1 7 .0 /4 3 . 0
1 4 .0 /3 9 . 5
1 4 .0 /4 0 . 5
N o t A p p lic ab le
Lig h t/ Q u ic k
W as h
1 1 .0 /3 7 . 0
8 . 0 / 3 3 .5
7 . 0 / 3 4 .5
N o t A p p lic ab le
Fi n a l S p i n
(R PM / M i n )
80 0/3.5
60 0/ 3. 0
50 0/4.5
N o t A p p lic ab le
M a x Ex t r a c t
C y c le s
C ot t on/ S t urdy
E a sy C a r e /
Pe rm Press
D e lic a t e s
H a nd
W a sh a b l e s
H e a v y W a sh
2 3 .0 /4 6 . 0
2 0 .0 /4 1 . 5
2 0 .0 /4 2 . 0
2 0 .0 /4 3 . 0
N o r m a l W a sh
1 7 .0 /4 0 . 0
1 4 .0 /3 5 . 5
1 4 .0 /3 6 . 0
1 4 .0 /3 7 . 0
Lig h t/ Q u ic k
W as h
1 1 .0 /3 4 . 0
8 . 0 / 2 9 .5
8 .0 /3 0 .0
8 .0 /3 1 .0
Fi n a l S p i n
(R PM / M i n )
80 0/4.0
60 0/ 3. 5
50 0/5.0
50 0/5.0
Notes:
1. The main wash times listed include 2 minutes of bleach fill and tumble time.
2.
The total cycle times are approximate and will vary based on water fill times, due to types of
clothing loads, available water pressure and the time for the door lock system to retract at
the end of the cycle.
3.
The main wash time is affected significantly if the machine control detects an excessive
amount of suds. The washer will go into a suds reduction routine, consisting of a series of
additional rinse and partial drain cycles to reduce the suds present (See Troubleshooting &
Diagnosis - Clothes Wet at End of Spin).
Tumble Pattern - Number of seconds tumbling/Number of seconds of pause between tumbles.
Cotton/ Sturdy
Easy Care/
Perm Press
Delicat es
Hand W ashab les
7/3
5/3
6/24
3/27
16008373-01
© 1998 Maytag Corporation
SECTION 1. GENERAL INFORMATION
1-13
GENERAL COMPONENT EXPLODED VIEW
16008373-01
© 1998 Maytag Corporation
SECTION 1. GENERAL INFORMATION
1-14
SECTION 2.
ELECTRICAL
ELECTRICAL COMPONENTS & TESTING
TEST
EQUIPMENT
The equipment required to service Maytag
products depends largely upon the conditions
you encounter. Locating a malfunction will
Description
Part Number
Analog Test Meter
20000005
Digital Test Meter
20001001
Clamp-On
20000002
Ammeter
AC Voltage Sensor
20000081
Analog Test Meter
can be used to check
for open or closed
circuits, measure resistance, AC and DC volts,
and temperature.
Clamp-On Ammeter
can be used to detect
shorts. Overloads on
the circuit
breaker or fuse
can be traced
to either the
washer or circuit
breaker by checking the washer
current draw.
Digital Test Meter
can be used to check for
open or closed circuits,
measure resistance,
AC and DC volts,
and temperature.
16008373-01
often require the use of electrical testing
equipment such as:
AC Voltage Sensor
can be used to alert you if
AC voltage is present so proper
safety precautions can be observed.
The tip of the sensor will glow
bright red if voltage is between
110-600 volts AC.
SECTION 2.
© 1998 Maytag Corporation
ELECTRICAL COMPONENTS & TESTING
2-1
ELECTRICAL TESTS
Water Valve Test
Warning - Always shut off
electrical power to the
unit 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.
Voltage Checks
Generally, these checks will consist of taking
readings at the wall receptacle to determine
the availability of voltage to the product. Voltage checks on individual components of a
product are not recommended due to the
possibility of electrical shock. Component part
testing is best accomplished through continuity checks with an Appliance Test Meter
(See Electrical Test Equipment).
NOTE: Use of the meter on voltage higher
than the indicated range may cause permanent damage to the meter. To prevent damage, first select the highest range and then
lower the range for readings which fall within
the lower scale.
Set up meter for use as follows:
1.
Turn selector knob to desired meter function and appropriate range.
2.
Plug black lead into socket marked black
(-).
3.
Plug red lead into socket marked red (+).
4.
Place test leads into receptacle to determine voltage available.
16008373-01
Check the water valve for electrical continuity. This check should be made with the electrical supply disconnected from the washer.
Remove the wire harness from the water valve
terminals and place the ohm meter probes on
the terminals of the water valve. The water
valve solenoid coil should have a resistance
between 500-1000 ohms. If no ohms are
shown on the display of the electrical test
meter, the solenoid coil has an open winding
and the valve should be replaced. The thermistor in the water valve changes in resistance
in direct relationship to water temperatures.
To monitor the performance of the thermistor,
run a partial hot water fill and check the ohm
resistance of the thermistor circuit. Then, run
a cold water fill and measure the resistance
again. There should be a notable difference
in the resistance readings. To check the ohm
resistance, pull the P2 wire harness connector off the machine control and locate the
P2(5) and P2(6) leads in the connector
(Figure 2-3).
Wax Motor Check - Door Lock
Mechanism
Check the wax motor for proper resistance.
This check should be made with the electrical
supply disconnected from the washer. Remove the wire harness from the wax motor
terminals and place the ohm meter probes on
the terminals of the wax motor. The wax motor should have a resistance of approximately
1900 ohms at room temperature. To check
wax motors through console, see section:
Machine Control page 2-5.
SECTION 2.
© 1998 Maytag Corporation
ELECTRICAL COMPONENTS & TESTING
2-2
Timer & Console Switches
T
C
B
The timer is located in the control console on
the back. It is composed of a series of switches
driven by an electric timer motor. The timer
motor rotates a pinion gear which then rotates
internal cams. As the cams rotate, they lift
and drop various switch contacts which ride
on the cam. The internal switches provide
cycle sequence or step inputs to the machine
control to control the pump, dispenser wax
motors, delay light, ON light and timer motor.
The timer wire harness connector can be
pulled and the individual contacts for the various circuits can be checked with an ohm
meter. As illustrated, timer contact for the
drain pump is 14T (Figure 2-1).
Figure 2-1
You can identify the wire for the drain circuit
(Figure 2-2) by tracing down the side of the
connector to contact 14, and across to align
with column T.
Contact 8B in the connector is a direct contact to the neutral leg of the timer. When an
ohm meter probe is placed into the 14T connection and the other probe is placed into 8B,
an ohm reading of the complete drain circuit
can be performed. The drain circuit should
have a resistance of approximately 18 ohms.
This is the resistance reading of the pump
16008373-01
Figure 2-2
motor windings. The following chart can be
used for checking other components via the
timer wire harness connector.
Description
Connector
Connector
Ohms
Pump
Motor
14T
10B
18
Bleach Wax
Motor
2B
10B
950-1100
Softener
Wax Motor
2T
10B
950-1100
Timer
Motor
10T
10B
5000
Timer Input Charts
As stated previously, the machine control
board receives inputs from the timer monitor
where the timer is in the cycle. The machine
control board accomplishes this by routing
four circuits through the timer. Two of the circuits (1A & 1B) are supplied with 120 VAC and
the other two circuits (2A & 2B) are 24 VDC.
The voltages for the four circuits is shown on
the timer chart of the electrical schematic
enclosed in the washer console.
SECTION 2. ELECTRICAL COMPONENTS & TESTING
© 1998 Maytag Corporation
2-3
Software in the machine control board specifically monitors the timer input circuits to
determine where the timer is in all the wash cycles and will rapidly advance the timer to
OPEN and break contacts in the timer. The timer is solely used as an off-board set of
relay switches. Note: The timer motor is hard wired to timer cams 10T and 10B in the
timer.
CYCLE SEQUENCE
TIMER 1A
(120 VAC)
PK19/P7(8)
TIM ER 1B
(120 VAC)
YL16/P7(7)
TIMER 2A
(24 VDC)
PU17/P3(3)
TIM ER 2B
(24 VDC)
BU18/P3(5)
PREWASH TUM BLE
0
1
1
0
PREWASH DRAIN
1
1
1
0
MAIN WASH TUM BLE
0
1
0
0
LIGHT WA SH TUM BLE
1
1
0
0
BLEACH DISPENSE
1
0
1
0
RINSE TUMBLE
1
0
0
1
SPIN 1
0
0
1
0
SPIN 2
0
0
0
1
SPIN 3
0
1
0
1
EXTRA RINSE
1
1
0
1
DELAY
1
0
0
0
IDLE
0
0
0
0
Key:
0 = Input Signal Not Asserted
1= Input Signal Asserted
There are conditions under which the machine control will shut the cycle down if the
timer does not advance.
-
During Extra Wash/Prewash: If the timer inputs do not change away from Prewash
Tumble for 15 minutes, the machine control will open the line relay.
-
During Main Wash: If the timer inputs do not change for 29 minutes, the machine
control will open the line relay.
-
During any increment when the machine control energizes the timer motor until it
sees the timer inputs change: If the timer inputs do not change for 5 minutes with the
timer motor continuously energized, the machine control will open the line relay.
These varying delays are to allow the washer to progress through several increments
where the timer inputs normally do not change. In these cases, the machine control
energizes the timer motor for 30 seconds, which is its advance time. It does not look for
a timer input change.
16008373-01
SECTION 2.
© 1998 Maytag Corporation
ELECTRICAL COMPONENTS & TESTING
2-4
Machine Control
The machine control microprocessor board is located in the control console, mounted to the
rear panel. The board receives input from the timer, door latch and lock switches, and unbalance and selector switches on the console. It also communicates with the motor control board
to facilitate the various cycles and drive the motor for optimum performance. Torque and
speed of the motor are monitored through the motor control board.
Prior to Series 17
Figure 2-3
Series 17 and After
Figure 2-3b
Both incoming and exiting voltage are monitored through the machine control board and the
surrounding circuitry. The following table lists the voltages for the various terminals on the
microprocessor board. If proper voltage is not present, check switches and wiring for any
loose connections or open circuits by disconnecting the power supply and performing continuity checks of individual circuits. NOTE: Connector P5 is Neutral input and L1 input is the
Line Relay Connector Comm (Gray wire), L1 output is Line Relay Connector Comm (Black
wire).
To check voltages from the board, turn timer dial to a wash cycle and press the start/off button.
This will activate the L1 relay board and apply power on the machine control.
16008373-01
SECTION 2. ELECTRICAL COMPONENTS & TESTING
© 1998 Maytag Corporation
2-5
M A C H IN E
CON TROL
BOARD
T ERM IN A L/ W IRE
M A C H IN E
CON TROL
BOARD
T ERM IN A L/ W IRE
V O L T A G EAPP R O X .
(W hen A ct i v a t e d )
T IM ER
C O N TACT
Permanent Press
(Fab ric Sw i tch )
P5 (W H11)
P3/2 (PK 37)
24 VDC
N o t Inv o lv e d
Delicates
(Fab ric Sw i tch )
P5 (W H11)
P3/6 (OR 38)
24 VDC
N o t Inv o lv e d
H a n d W ash
(Fab ric Sw i tch )
P5 (W H11)
P3/8 (BR 39)
24 VDC
N o t Inv o lv e d
C o t t on/ S t urd y
(Fab ric Sw i tch )
P5 (W H 1 1 )
P5 (W H 1 1 )
P5 (W H 1 1 )
P3/2 (PK 37)
P3/6 (OR 38)
P3/8 (BR 39)
0 VDC
0 VDC
0 VDC
N o t Inv o lv e d
Signal O N / O FF
( O p t i o n s S w i t ch )
P5 (W H 1 1 )
P2/1 (PU 21)
24 VDC - O N
0 VDC - O FF
N o t Inv o lv e d
Extra Rin se
( O p t i o n s S w i t ch )
P5 (W H 1 1 )
P7/8 (PK 19)
120 VA C
12B, 6B ,8T
M ax Extract
( O p t i o n s S w i t ch )
P5 (W H 1 1 )
P2/3 (Y L 20)
24 VDC
N o t Inv o lv e d
Push To Start
Sw it ch
(When pressed)
P5 (W H 1 1 )
P1/3 (RD 28)
120 VA C
N o t Inv o lv e d
U nbalance
C o nt r o l
P5 (W H11)
P2/4 (OR 40)
24 VDC
N o t Inv o lv e d
D o o r Lock - Sp in
P3 (1)
P3/7 (Y L 36)
24 VDC
N o t Inv o lv e d
M ot o r Control &
M a ch in e C o nt r o l
P5 (W H11)
LIN E RELA Y C O M
(BK 27 or BK1)
120 VA C
N o t Inv o lv e d
H o t W ater V a l v e
P5 (W H11)
P7/1 (OR7)
120 VA C o r
500-10 0 0 O h m s
N o t Inv o lv e d
C o ld W a t e r V a lv e
P5 (W H11)
P7/2 (BU 9 )
120 VA C o r
500-10 0 0 O h m s
N o t Inv o lv e d
D o o r Lock W a x
M ot o r
P5 (W H11)
P7/4 (BR 14)
120 VA C
N o t Inv o lv e d
Bleach W a x
M ot o r
P5 (W H11)
N o t Inv o lved
120 VA C
2T
S o ft e n e r W ax
M ot o r
P5 (W H11)
N o t Inv o lved
120 VA C
2B
D e l a y L ight
P5 (W H11)
N o t Inv o lved
120 VA C
4T
O n Li g ht
(S e r ies 17)
P5 (W H11)
P7/5 (RD 3)
120 VA C
N o t Inv o lv e d
FU N CTIO N
16008373-01
SECTION 2.
© 1998 Maytag Corporation
ELECTRICAL COMPONENTS & TESTING
2-6
DRIVE MOTOR
The drive motor is a switched reluctance type
motor. The basic operating principle of the
switched reluctance motor is direct magnetic
attraction between the stationary electromagnetic coils (stator) and a specially configured
rotor or armature (Figure 2-4). The rotor is
comprised of stacked plates or laminations
mounted on a center shaft. The shape of
these laminations are characteristic of the
switched reluctance motor. The rotor, when
viewed from the end of the rotor, has "teeth"
much like a gear. These "teeth", or pole pieces,
are pulled as the result of direct current power
through the stator coils.
The following illustration shows the motor
terminals for each of the coils involved. The
letters with positive and negative symbols indicate the motor phase circuitry of the
terminals.
Motor Harness Connector
Figure 2-5
Refer to section titled Motor Control for board
identification of A, B and C terminal/harnesses
(Figure 2-6). Also, see the wiring schematic
for harness identification.
MOTOR CONTROL BOARD
Figure 2-4
Multiple stator coils are positioned around the
rotor and are connected in three different
phased "sets" of paired coils.
Magnetic attraction causes the rotor poles to
turn toward the coils. The electronic motor
control board switches the magnetic field off
as the rotor pole piece approaches; then,
turns on another set of coils further ahead. It
is this switching action of motor phases that
determines direction and rotational speed of
the rotor (and shaft). The motor control board
changes the 120 VAC voltage line input to 170
VDC, and distributes the current phases to the
stator coil sets in sequence to the drive
motor.
16008373-01
The motor control board receives 120 VAC
voltage from the line cord and distributes DC
voltage to the drive motor. The motor control converts the voltage from single phase to
3 phase for the drive motor.
Another purpose of the motor control is to
monitor the drive motor speed through a tachometer circuit linking the motor control
board to a tachometer on the drive motor. This
is a 3-wire circuit comprised of a Black, Blue
and White wire harness. Failure of this circuit
will cause the motor to start jerking in place
or accelerate rapidly for up to 5 seconds. This
occurs whenever the tachometer in the drive
motor is trying to locate the proper shutter
and sensor sequence. For example, if the tachometer signal is lost from the motor control to the machine control just prior to spin,
the motor will ramp up for 5 seconds then
stop.
SECTION 2. ELECTRICAL COMPONENTS & TESTING
© 1998 Maytag Corporation
2-7
Motor & Motor Contr
ol TTest
est
Control
1. Set the timer knob into the delay increments.
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 machine 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 harness on front end of motor control board.
6. Plug the washer power cord into a 120 VAC
power source. The motor control will immediately 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 connector 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 motor 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 motor control/wire harness assembly complete and check motor windings for damage (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 replace motor control board connector JP4
when finished.
Motor Phase TTest
est
Figure 2-6
16008373-01
It is possible for the motor to still run under
light loads when one of the phases of the
motor is nonfunctional. One possible symptom would be a "growling" noise from the
motor. Torque is decreased when the motor
is out of phase. This could result in a customer complaint that the load is not spinning
out properly or it does not tumble consistently
with a large load (See Section 3: TTrroubleshooting).
SECTION 2. ELECTRICAL COMPONENTS & TESTING
© 1998 Maytag Corporation
2-8
To gain access to the motor control board
terminals (Figure 2-6):
1 . Disconnect power to the washer prior to
testing.
2 . Remove the two screws securing the motor control assembly to the base. Unsnap
the two twist-lock wire ties restraining the
motor to the motor control board harness
base.
windings check (See Motor Windings
Check).
10. Check Phase B by disconnecting the white
or red wire at the motor control board. If
the motor operates with a slight growling
sound, phases A and C are operating correctly.
Reconnect phase B and test with
phase A disconnected. If the motor does
not run properly, phase A or C is not functioning.
Perform the motor windings
check (See Motor Windings Check).
3 . Remove the green ground wire, line & neutral wires and the JP4 connector from the
motor control board.
4 . Carefully lift the front end of the motor
control board to disengage the rear locking tabs from the slots in the base. Slowly
drag the motor control board, with motor
harness attached, toward the front of the
washer and place in front of the washer.
5 . Remove the screw securing the splash
shield covering the face of the motor control board. Pivot the splash shield with top
screw in the motor control board metal
frame, allowing the plastic shield to become an electrical shield between the
motor control board and the base.
6 . Reconnect the ground wire, line 1 and neutral wires. Leave the JP4 connector off the
board (Figure 2-6).
1 . Disconnect power to the unit.
2 . Remove each pair of phase wires from the
motor control and perform an ohm check
of each wire leading to the motor. Each
wire pair should show 2-3 ohms resistance
(Figure 2-5).
2 . There should be no continuity between
any of the terminals and the frame of the
motor.
3 . Check that all six motor terminals are secure and at the same height in the connector housing. Replace motor if terminals are pressed into the motor.
4 . Remount the six-position motor connector onto the motor. Reassemble the drip
shield cover onto the motor control.
7 . Place the timer knob into the delay
increments.
8.
Plug the power cord into the wall socket
and press the push-to-start button.
9.
Check Phase C by disconnecting the yellow or orange wire at the motor control
board. If the motor operates with a slight
growling sound, phases A and B are operating correctly.
Reconnect phase C and
test with phase B disconnected. If the
motor does not run properly, phase A or
B is not functioning. Perform the motor
16008373-01
Motor Windings Check
5 . Reposition the motor control into the
washer when finished. Make sure the two
screws and the twistlock wire ties are fastened properly to the wire harness.
SECTION 2.
© 1998 Maytag Corporation
ELECTRICAL COMPONENTS & TESTING
2-9
PHASE
WIRE COLORS
MOTOR CONDITION
RESULT/SOLUTION
C
Yellow or Orange
Runs
-Phases A&B are operating correctly.
(Check Phase A and B)
-Phase A or B is non-functional.
(See Step 10)
Does Not Run
B
White or Red
Runs
Does Not Run
A
Black or Blue
Runs
Does Not Run
-Phases A&C are operating correctly.
(Check Phase A and C)
-Phase A or C is non-functional.
(See Step 10)
-Phases B&C are operating correctly.
(Check Phase B and C)
-Phase B or C is non-functional.
(See Step 10)
Tachometer Cir
cuit Diagnostics
Circuit
The tachometer system of the motor is comprised of a plastic wheel, called a shutter, and
an optical sensor (Figure 2-9). The shutter is
mounted to the end of the motor shaft under
the plastic endbell covering of the motor. The
edge of the shutter resembles a "picket fence"
with different size "pickets." The pattern consists of six different "pickets" which are repeated eight times. An optical sensor is
mounted to one side of the shutter and monitors the "pickets" as they pass through the
sensor.
Figure 2-9
As the "pickets" pass through the sensor field,
signals are generated and transmitted to the
motor control board through the tachometer
wire harness (Figure 2-10 and 2-11).
Figure 2-10
16008373-01
SECTION 2. ELECTRICAL COMPONENTS & TESTING
© 1998 Maytag Corporation
2-10
The following table indicates voltage checks
of the tachometer harness between the motor and motor control board.
Figure 2-11
The motor control monitors the signals and
communicates this information to the machine control. The purpose of this signal is to
tell the motor when to energize each winding
in the motor and to tell the machine control
the actual motor speed.
Note: If the machine control board does not
receive an input signal from the motor control/tachometer circuit (JP4 connector), the
motor speed will rapidly accelerate for 5 seconds then shut down. The machine control
will sense a "locked rotor" condition and the
motor will stop. If the motor control does
from
motor,,
not rreceive
eceive an input signal fr
om the motor
the motor will "jerk" for 5 seconds then shut
down.
1. Inspect the motor control wire harness for
integrity of the connections on both ends.
The harness is comprised of a White, Blue
and Black wire.
2. Set the washer into the Delay Wash cycle
and press the start/off button. The unit will
start without activating the motor. Leave
the tachometer harness on the motor control and insert the meter probes into the
back side of the tachommeter harness.
16008373-01
Tachometer
Wire Checks
Voltage Found
Condition Of
Component
White to Black
(From Motor
Control)
11 VDC
(± 2.5 VDC)
Good Motor
Control Board
White To Black
(From Motor
0 VDC
Control)
Bad Motor
Control Board
White To Black
+ 13 VDC or
(From Motor
<9 VDC
Control)
Bad Motor
Blue to Black
(From Drive
Motor)
No change in
DC volts as
motor is turned
slowly
Blue to Black
(From Drive
Motor)
Voltage
changes from 0
- 5 VDC volts as Good Motor
motor is turned
slowly.
Bad Motor
UNBALANCE CONTROL SYSTEM
The unbalance control system is comprised
of the inertial switch, outer tub displacement
switch, strut displacement switch and a cabinet vibration sensor mounted to the machine
control board. The three switches are wired
in series on a 24 VDC circuit, monitored by
the machine control board. The sensor is
mounted on the machine control board.
Software in the machine control board will
begin monitoring the switches when the spin
speed reaches 90 rpm. The inertial unbalance
switch monitors outer tub vibrations above
150 rpm. Inside the door is a cabinet vibration absorber designed to counter the vibration of the tub and serve as a tuned absorber
for the whole washer.
SECTION 2. ELECTRICAL COMPONENTS & TESTING
© 1998 Maytag Corporation
2-11
Whenever a displacement switch is tripped,
the machine stops and redistributes the
clothes load. This involves a three (3) second
pause, followed by a five (5) second reverse
tumble (47-49 rpm) to redistribute the clothes
load. The washer will pause again for three
(3) seconds, then start the distribution profile
again. To redistribute the load, the machine
tumbles the load (50-90 rpm) and again attempts to pass through critical (about 150
rpm). The machine will try to redistribute
twice as the washer attempts to spin at 800
rpm.
Tub Displacement Switch
Once the load is properly redistributed and
the speed reaches above 500 rpm, the inertial
switch and cabinet vibration sensor are used.
If the inertial switch or sensor is activated, the
washer will drop in spin speed. This is based
upon the speed at which switch activation
takes place. See Figure 2-12 outlining the spin
speed categories and the corresponding reduced speeds. If the switches are not activated, the final spin speed will reach a maximum of 850 rpm and then drop to find the
optimum performance level, based upon
readings taken by the cabinet vibration sensor. Consumers may be confused by the upand-down cycling of the motor. However, the
machine is searching for the optimal speed
performance.
1 . Disconnect power to the unit.
RPM
FUNCTION
4 7 ...........................T u m b l e
47-85 .......................Distribution
90-250 .....................Accelerate Through
Critical
250-499 ..................Accelerate Through
Critical
500-575 ..................High Speed Acceleration
- WILL DROP TO 450 RPM
600-675 ..................High Speed Acceleration
- WILL DROP TO 555 RPM
> 6 7 5 .......................High Speed Acceleration
- WILL DROP TO 650 RPM
750-800 ............. TOP SPIN SPEED
The tub displacement switch is located on the
upper right hand side of the outer tub, below
the top concrete weight, between the outer
tub and the cabinet. The switch senses the
outer tub touching the cabinet side as the
machine passes through critical. When this
switch is tripped, the machine stops and redistributes the load.
Testing the Tub Displacement Switch:
2 . Place ohm meter leads across the two terminals of the switch. Depress the button
on the switch. If the contacts open, the
switch is good. If not, replace the switch.
Strut Displacement Switch
The strut displacement switch is clipped to the
top of the left rear strut. The switch senses
the outer tub bottoming out on the strut as
the machine accelerates above 90 rpm. This
is caused by the twisting motion of the outer
tub. This additional switch is required because
the twisting motion may not trip the outer tub
displacement switch. The primary cause for
activation would be an unbalance at the front
and rear of the spinner on opposite sides.
The strut displacement switch is wired in series with the tub displacement switch and
causes the same type of redistribution.
Testing the Strut Displacement Switch:
1 . Disconnect power to the unit.
2 . Place ohm meter leads across the two terminals of the switch. Depress the button
on the switch. If the contacts close, the
switch is good. If not, replace the switch.
Figure 2-12
16008373-01
SECTION 2.
© 1998 Maytag Corporation
ELECTRICAL COMPONENTS & TESTING
2-12
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 consists 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 contacts in the switch. When the machine controller 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:
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 optimum speed on every run. The optimum speed
is between 750 and 850 rpm.
Cabinet Vibration Absorber
This is a tuned absorber mounted in the door.
The tuned absorber consists of a mass suspended by springs tuned to vibrate at approximately 800 rpm. The mass vibrates 180 degrees out of phase with the vibration of the
cabinet. This cancels out much of the vibration caused by the clothes load at 800 rpm (See
Section 5: Cabinet Assembly).
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 terminals 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.
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
16008373-01
SECTION 2.
© 1998 Maytag Corporation
ELECTRICAL COMPONENTS & TESTING
2-13
16008373-01
SECTION 2.
© 1998 Maytag Corporation
ELECTRICAL COMPONENTS & TESTING
2-14
SECTION 3.
TROUBLESHOOTING
Warning - Always shut off
electrical power to the
unit before beginning any
service repair procedures.
Shuts OFF When Push-To-Start Button Released:
Check for proper wiring of BK 27 to COMM
and GY 26 to NO. If reversed, the washer will
shut off when button is released. If wiring is
proper, replace machine control board. Line
relay may be bad (See Section 1: Push-ToStart Line Relay Operation).
Runs For Five Seconds Then Shuts OFF:
Suspect a communication problem between
motor, the motor control board and the machine control board. Check the motor and
motor control system by removing the JP4
connector on the motor control board. Set
the timer dial into the delay cycle and then
press the push to start switch. If the motor
operates and the washer goes into a 50 rpm
tumble, then the source of the problem is the
RD 30 wire leading from the motor control to
the P4(2)/RD30 connector on the machine
control board. When the machine control
tells the motor control to run the motor, it
monitors the red wire to determine if the motor is actually running. If the board does not
see a return signal, the washer will shut down.
If RD30 wire is making contact, then suspect
possible problems with timer input circuits.
(See the following section on Machine Operation Does Not Match Cycle Description):
Washer Runs Five Minutes Then Shuts OFF
OFF::
During the wash cycle, the machine control
communicates with the timer, via the timer input circuits. If the machine control board does
not see a change in timer inputs over a period
of 5 minutes, it will open the line relay and shut
the washer off. Check the timer input circuits
for poor connections at the timer and the machine control board. Replace timer if necessary (See Section 2: Timer Input Circuits).
Shuts OFF In The Middle Of The Spin Cycle:
During the spin cycle, the machine control
monitors the door lock mechanism to ensure
the door is locked. This is done through the
door lock enable switch. During "lock mode,"
the shaft of the door lock mechanism is
pressed forward by the door lock wax motor,
and the shaft presses in the button of the door
lock enable switch. If the machine control
board sees the switch OPEN during the spin
cycle, the machine control board will automatically shut the washer OFF. This is caused
by a weak spring in the door lock wax motor.
Replace the complete door lock mechanism.
Shuts OFF During Final Rinses:
The machine control board is programmed to
allow a maximum continous fill time of six
minutes or an accumulated fill time of 8 minutes for each full wash cycle. If the required
fill time exceeds the time limit, the washer will
shut down. This is to prevent flooding in the
event there is a loose hose clamp or damaged
air dome hose. Check the incoming water lines
for a minimum pressure of 20 psi. If lower,
the customer can use smaller clothes loads
and reduce the pressure to 10 psi. An alternative solution would be to change the plastic
inlet screens to metal screened washers and
remove the nozzle extender found in the water valve inlet hose near the dispener inlet.
16008373-01
SECTION 3.
© 1998 Maytag Corporation
TROUBLESHOOTING
3-1
Tumbles Only:
Excessive Vibration:
When the door lock mechanism is in the
"locked" mode, the wax motor has extended,
forcing the latch axle to engage the door lock
enable switch. This ensures the door is fully
locked and the switch can then complete the
signal back to the machine control board indicating the door is locked.
Check connector
P3(7)/YL 36 wire to verify if the terminal is
making good contact to the board terminal.
Check the door lock enable switch for continuity when the button is depressed. Replace
door lock mechanism if necessary.
Ensure that shipping bolts and straps have
been removed from the washer. Check the
levelness of the washer and ensure the leveling leg nuts are tightened up against the cabinet. Check the tightness of the upper and
lower weights on the outer tub. Check for
loose cabinet screws. Place hand on side of
cabinet to determine if vibration noise due to
cabinet flex. Apply sound dampening pad to
inner cabinet wall if necessary. Check the unbalance circuit and wiring for continuity at the
machine control (P2(4) to P3(1). Continuity
should be present. If not, check the wiring
connections at the strut, outer tub and interial
unbalance switches. If a switch is bad or a
wire off, the machine control will not know
when an unbalance occurs. The machine control board checks the state of the circuit prior
to beginning the spin cycle, then monitors the
circuit throughout the cycle. If the circuit is
OPEN, the board will not see “a change in
state” whenever one of the normally-closed
switches is activated during an unbalanced
load condition.
ContinuesTo Tumble After The Wash Cycle
Is Finished:
Check for a stuck button on the door lock enable switch in the door lock mechanism. You
can verify this at the machine control board
by checking for continuity across P3(7)/YL 36
to P3(1)/RD23. If the door is unlocked and
there is continuity, the switch button is stuck.
At the end of the wash cycle, the machine control monitors the door lock enable switch for
disengagement. If the switch is stuck, the
washer will continue to tumble till the door
unlocks, even though the door is actually unlocked. Replace the door lock mechanism.
Third Rinse Cycle Is Always Cold:
If the user rotates the timer dial to the third or
fourth rinse, the water will always be cold regardless of temperature selection. The machine control board counts the number of
rinses through the wash cycle. When the third
and fourth rinse are reached, the board will
check the rinse temperature selection for
proper fill temperature (See Section 1:Water
Temperature Inputs).
Machine Operation Does Not Match Cycle
Description:
The machine control board monitors where
the timer is in the cycle and then uses this information to start different operations, such
as drain, fill, tumble and spin. Four input wires
from the timer to the machine control board
inform the machine control board where the
timer is in the wash cycle. However, if one or
more of these wires are making an intermittant
contact with the machine control board, the
board can be “misinformed” and will not respond properly.
Check the connections of the timer input wires
leading from the timer to the machine control board ( S e e S e c t i o n 2 : T i m e r I n p u t
Charts). Also, check wiring of all console
switches to ensure no cross-wiring of 24 VDC
and 120 VAC circuits.
16008373-01
SECTION 3.
© 1998 Maytag Corporation
TROUBLESHOOTING
3-2
Door Leaks:
Dispenser Does Not Dispense
Dispense::
Usually this occurs when the door is remounted into the shroud and the technician
fully tightens the top hinge screw prior to inserting the lower screw. The technician should
fully seat the door into the shroud evenly prior
to tightening the hinge bracket screw into the
shroud. Check also for excess plastic flashing
in the tab area of the plastic shroud. Carefully remove the excess flash and remount the
boot gasket.
Examine the siphon cap to see if the cap was
twisted, causing the cap to seal the siphon
tube against the bottom of the siphon cup. Reposition cap to lift the siphon tube off the bottom of the cup. The wax motors are activated
a full 30 seconds prior to turning on the water
valves. If the timing is not correct, suspect a
bad wiring connection. Also, examine the linkage of the acutuator arm and proper location
of the spring on the wax motor (See Section
6: Water Carrying Components).
“Thumping” Noise In Spin :
Clothes Wet:
The noise could be from loose lower front
weight mounting bolts or a loose bolt securing the driven pulley. Check the belt for a weak
seam and replace if necessary. Check the
motor adjustment bolt for tightness.
"Ticking or Knocking" Noise In Spin
Spin::
The noise could be from a loose wire harness,
plastic purse-lock wire harness retainer on
upper hose hitting the topcover or a plastic
injection mold standoff on the outer tub bearing housing may possibly be interfering with
the driven pulley.
Possibly due to the washer shutting down too
soon or execessive suds present. Did the timer
advance to OFF? If yes, then excessive suds
may be the cause or the intertial unbalance
switch tripped too soon, resulting in lower spin
speeds. Change the inertial switch if suds were
Note: If the timer motor is ennot detected.
ergized for five minutes without the cycle inputs changing, the machine control board will
drop the line voltage relay.
Also, check the drive belt for a weak spot on
the belt. Ussually felt on the backside of the
belt as a "flat" spot. Replace the belt.
RF (Radio Frequency) Interference:
The interference could occur if the RPT shutter on the motor was misaligned or a motor
terminal has been pushed inward slightly
when the motor harness connector was
placed on the motor. Remove the motor phase
harness connector and check the motor terminals. Replace the motor if the motor
teminals are loose.
16008373-01
SECTION 3.
© 1998 Maytag Corporation
TROUBLESHOOTING
3-3
TROUBLESHOOTING
16008373-01
SECTION 3.
© 1998 Maytag Corporation
TROUBLESHOOTING
3-4
TROUBLESHOOTING
16008373-01
SECTION 3.
© 1998 Maytag Corporation
TROUBLESHOOTING
3-5
TROUBLESHOOTING
16008373-01
SECTION 3.
© 1998 Maytag Corporation
TROUBLESHOOTING
3-6
TROUBLESHOOTING
16008373-01
SECTION 3.
© 1998 Maytag Corporation
TROUBLESHOOTING
3-7
TROUBLESHOOTING
16008373-01
SECTION 3.
© 1998 Maytag Corporation
TROUBLESHOOTING
3-8
TROUBLESHOOTING
16008373-01
SECTION 3.
© 1998 Maytag Corporation
TROUBLESHOOTING
3-9
TROUBLESHOOTING
16008373-01
SECTION 3.
© 1998 Maytag Corporation
TROUBLESHOOTING
3-10
TROUBLESHOOTING
16008373-01
SECTION 3.
© 1998 Maytag Corporation
TROUBLESHOOTING
3-11
TROUBLESHOOTING
16008373-01
SECTION 3.
© 1998 Maytag Corporation
TROUBLESHOOTING
3-12
TROUBLESHOOTING
Use a knife or scissors to cut across the + in the center of the dial and press the template over
the timer shaft. Align the template with the OFF indicators of the Quick Wash and Regular wash
on the facia. Press the timer knob onto the timer shaft.
16008373-01
SECTION 3.
© 1998 Maytag Corporation
TROUBLESHOOTING
3-13
MISCELLANEOUS
INFORMATION
Energy Usage:
The energy usage averages up to 0.10 Kwh per cycle, when using the Regular cycle with Normal wash. Peak amperage is 7.5 amps during acceleration to high speed spin, with nominal
running amperage at a maximum of 5.0 amps.
Washer Wattages
Wattages::
The following wattages are approximate and without clothes:
Function:
Delay
Tumbling (empty) & water fill
Tumbling (Full-Wash level)
Tumbling (Full-Rinse Level)
Draining (No tumble) with water
Draining (No tumble) no water
Spinning (100 rpm)
Spin Acceleration (100-200 rpm)
Spinning (400 rpm)
Spinning (850 rpm)
Wattages:
10-15
50-70
110-120
140-150
45-50
30-35
85-90
130-150
160-170
400-410
16008373-01
SECTION 3.
© 1998 Maytag Corporation
TROUBLESHOOTING
3-14
SECTION 4.
CONSOLE
Warning - Always shut off
electrical power to the unit
before beginning any service
procedure.
5 . Push the bottom of the console toward
the back panel to disengage the six locking feet from the top cover (Figure 4-3)
4-3).
REMOVAL
1 . Disconnect power to the unit.
2 . Remove the three screws securing the console rear cover plate across the rear top
edge of the console (Figure 4-1)
4-1)..
Console
Mounting
Screws
Figure 4-3
6 . Carefully lift and roll the console forward
onto the top cover. You now have access
to the console components and wiring
(Figure 4-4).
Figure 4-1
3 . Lay a drop cloth across the top cover of the
washer.
4 . Grasp the top of the console and gently rock
Figure 4-2
the top forward (Figure
4-2).
Figure 4-4
Figure 4-2
7 . To Reinstall: Roll the console back into
an upright position, engaging the locking
feet into the slots in the top cover. Replace the three screws to attach console
back to rear panel.
16008373-01
SECTION 4. CONSOLE
© 1998 Maytag Corporation
4-1
VERTICAL
SWITCHES
(Push Button)
HORIZONTAL
SWITCHES
(Push-to-Start)
REMOVAL
REMOVAL
Depress the tab at the top of the switch with
a screwdriver to disengage the tab from the
console. Pivot the switch away from the
console to remove (Figure 4-5)
4-5).
Depress the locking tab on the switch to
disengage it from the locking tab on the
console. Pivot the switch from the console
(Figure 4-6).
REPLACEMENT
REPLACEMENT
Align the rib on the bottom of the switch with
the slot in the console. Pivot the switch up
into the console until the tab engages the
console securely. Check that the locating tabs
on either side of the switch's lower alignment
rib are in position to properly center and lock
the switch into the lower part of the switch
opening.
Position one side into the console and pivot
the other tab into the console and apply enough
pressure to engage the tab into the console.
Locking Tab
Align the Center Rib
on the bottom of the
Switch with the Slot in
the Cup on the Bottom
of the Switch Opening
on the Console
Screwdriver
Locking Tab
Locking Tab
Locking Tab
Figure 4-5
Carefully Depress
Locking Tab on
Switch to Disengage
From Console
Pivoting the
Switch Body, Lock
it in at the Top of
the Opening
on the Console.
Figure 4-6
16008373-01
SECTION 4. CONSOLE
© 1998 Maytag Corporation
4-2
TIMER
REMOVAL
1 . Disconnect power to the unit.
REPLACEMENT
2 . Carefully lift the timer knob and dial off
the timer shaft by pulling the knob away
from the face of the control console
(Figure 4-7).
1 . Align the three tabs of the timer into the
slots of the console.
2 . Insert the timer into the slots and
slightly lift the locking tab of the timer.
Slide the timer away from the endcap
until the locking tab can engage with the
square hole in the console.
3 . Replace mounting screw.
Figure 4-7
3 . Disengage the console assembly from
the top cover and roll forward (See
Console Removal)
Removal).
4 . Remove timer mounting screw on back
of timer in the console.
5 . Slightly lift the locking tab on the back of
the timer (Figure 4-8).
6 . With the locking tab lifted, slide the timer
body toward the end cap of the console.
This will disengage the retaining tabs of
the timer from the slots in the console.
Figure 4-8
7 . Lift the timer away from the console.
16008373-01
SECTION 4. CONSOLE
© 1998 Maytag Corporation
4-3
16008373-01
SECTION 4. CONSOLE
© 1998 Maytag Corporation
4-4
SECTION 5. CABINET ASSEMBLY
Warning - Always shut off
electrical power to the unit
before beginning any service repair procedures.
DOOR ASSEMBLY & HINGES
The door assembly is reversible. It contains
an inertial vibration damper comprised of a
steel plate suspended with springs. The
damper is designed to tune out excessive vibrations generated by the machine during the
spin cycle. Replacement inner door liners are
shipped with the vibration damper in place.
Figure 5-1
REVERSAL
1. Repeat the above steps and, remove the
corresponding sheet metal spacers on the
opposite side.
REMOVAL
1. Open the door and remove the center
screw of each hinge secured to the inner
flange of the front panel in the door
opening.
2. Grasp the door with both hands and lift
the hinge area slightly. Draw the door assembly away from the machine. This will
disengage the hinges from the slots in the
front shroud (Figure 5-1). If the hinges
bind, press out on the plastic shroud near
the hinge toward the cabinet.
2. Remove the hinges from the door and relocate them to the other side of the door.
3. Remount the door into the new slots and
secure with one screw into each hinge.
4. Mount the sheet metal spacers onto the
side where the hinges were previously to
cover the hinge slots in the front shroud.
DISASSEMBLY
1. Remove ten screws located across the bottom and along either side of the door
panel. The top edge of the outer panel is
folded over the inner door plug.
2. With the outer door panel removed, the
stabilizer is exposed and is attached to the
inner door plug.
16008373-01
SECTION 5. CABINET ASSEMBLY
© 1998 Maytag Corporation
5-1
Cabinet Vibration Absorber
The purpose of the cabinet vibration absorber
is to provide a dampening effect to the washer
during the spin cycle. By dampening the
machine vibration, the washer is able to maintain and achieve optimum spin performance.
The stabilizer is attached to the inner door plug
with two screws.
2. Open the door and remove the four screws
along the inside lip of the door opening.
The two that are located vertically, on either side of the door opening, secure the
front panel to the front shroud assembly
(Figure 5-3). Care should be taken when
opening and closing the door with the
screws removed.
3. Remove the door.
Door Latch Hoop
Inner Door Liner
Figure 5-3
4. To remove the front panel, open the door,
twist the upper right and left panel extensions inward by pressing in on the outer
upper edges of the front panel posts. This
will disengage the front panel posts from
clips located on the face of the cabinet
flange (Figure 5-4).
Cabinet Vibration Absorber
Figure 5-2
Door Latch Hoop
The door latch hoop is snapped into the door
liner. A spring retains the hoop in the proper
position to align with the door lock mechanism when the door is closed. A plastic support is snapped into place over the latch hoop
at add strength (Figure 5-2).
5. Tilt the top of the front panel away from
the washer. Then, remove the front panel
(Figure 5-4).
FRONT PANEL
REMOVAL
Figure 5-4
1. Disconnect power to the unit.
16008373-01
SECTION 5. CABINET ASSEMBLY
© 1998 Maytag Corporation
5-2
TOP COVER
DOOR LOCK MECHANISM
REMOVAL
1. Remove the front panel (See Front Panel
Removal).
2. Remove the four screws fastening the dispenser bezel to the top of the top cover
(See Dispenser Assembly).
3. Remove two 5/16" hex head screws securing the two hold down brackets on the top
cover (Figure 5-5).
4. To remove the hold down brackets, swing
the bracket to the outside to unhook the
bracket from the slot in the top cover lip
(Figure 5-6).
5. If the door is still positioned on the front
shroud, open the door prior to lifting the
front of the top cover and tilt the top cover
toward the rear of the machine.
The purpose of the door lock mechanism is
to secure the door during the spin cycle.
When the door is shut, the wire loop on the
door engages the rotating gear in the door
lock mechanism (Figure 5-7). When the
proper water level is reached and the pressure switch is satisfied, 120 VAC is applied to
the wax motor. The piston in the wax motor
will extend, pushing the latch axle and sliding
gear from left to right. Teeth on the face of
the sliding gear will intermesh with the teeth
on the side of the rotating gear (normally takes
about 45-60 seconds). This interlocking of
teeth provides the locking action of the lock
mechanism.
At the end of the spin cycle, when tumbler
speed drops below 90 RPM, voltage is no
longer applied to the wax motor. The wax
motor will cool and relax the piston on the
wax motor. The latch axle and sliding gear
are then pulled from right to left, disengaging
the teeth of the sliding gear from the rotating
gear (normally takes 1 - 1½ minutes). This allows the rotating gear to be in a position to
rotate if necessary, should the door be
opened.
Rotating
Gear
Wax Motor
Gear Return
Sliding Spring
Spring
Gear
Door Lock
Switch
Accessory
Cable
Latch Axle
Lamp
Holder
Axle Spring
Figure 5-5
Figure 5-6
Door Switch
Ramp
Latch
Switch
Holder
Bulb
Cover
Figure 5-7
16008373-01
SECTION 5. CABINET ASSEMBLY
© 1998 Maytag Corporation
5-3
Two switches in the door lock mechanism inform the machine microprocessor control
when the door is latched shut and when the
door is securely locked. For more information, refer to section on Electrical-Mechanical
Troubleshooting.
An emergency access cord (filament) is attached to the sliding gear, should the wax
motor fail in the extended position and entry
into the washer is necessary. To gain access
to the cable, removal of the dispenser bezel is
necessary. Once removed, the cable is exposed. By carefully applying both a steady
pull of the access cord and opening force to
the door, the wax motor is overridden and the
sliding gear is pulled from right to left away
from engagement with the rotating gear.
Thus, allowing the rotating gear to release the
wire loop of the door.
NOTE: When the cord is released, the lock
will return to a locked position (Figure 5-8).
REMOVAL
1. Remove the front panel and raise the top
cover to expose the door lock mechanism
(See Front Panel & Top Cover).
2. Remove the wires from the lock switches,
wax motor and light fixture.
3. Remove light.
4. Remove two 5/16" hex-head screws securing the switch support to the metal shroud
support (Figure 5-8).
Emergency Access Cord
Mounting Screws
Figure 5-8
FRONT SHROUD ASSEMBLY
The shroud assembly ties the sides of the
cabinet together across the front for stability and provides support for mounting of the
door assembly, front panel and door lock
mechanism. To gain access to components
behind the front shroud, the assembly can
be removed as a whole assembly and lifted
onto the top of the washer. This will allow
access to the tub cover, spin basket, sump
area and etc..
REMOVAL
1. Remove the front panel and raise the top
cover to expose the front shroud assembly (See Front Panel & Top Cover).
2. With the door open, unsnap the boot gasket from around the inside perimeter of
the door opening by pulling out on the
sealing lip of the gasket (Figure 5-9).
16008373-01
SECTION 5. CABINET ASSEMBLY
© 1998 Maytag Corporation
5-4
CABINET ASSEMBLY w/REAR
ACCESS PANEL
Removal of the access panel gains access to
the rear components of the washer
(Figure 5-11).
Figure 5-9
3. Remove the door (See Door Assembly and
Hinge Removal).
4. Removal and replacement of the screws
in the following order, as illustrated, is necessary to provide proper alignment of the
parts. Failure to do so will hinder removal
and replacement of the shroud onto the
cabinet (Figure 5-10).
Figure 5-11
REMOVAL
Remove the four hex-head screws surrounding the access panel (Figure 5-12).
Spacer
Figure 5-10
Screws
5. Place a soft cloth over the top of the concrete weight. Carefully lift and stand the
shroud assembly on top of the tub. The
assembly can lean back against the top
cover. The wire harness on the left side of
the upper cabinet is long enough to do this.
When replacing the shroud, be sure to tuck
the harness inside the upper flange of the
top cover to keep the wires from being
pinched and damaged.
16008373-01
Access Panel
Figure 5-12
SECTION 5. CABINET ASSEMBLY
© 1998 Maytag Corporation
5-5
16008373-01
SECTION 5. CABINET ASSEMBLY
© 1998 Maytag Corporation
5-6
SECTION 6.
WATER-CARRYING COMPONENTS
Warning - Always shut off
electrical power to the unit
before beginning any service repair procedures.
WATER VALVE
5. While pulling the bracket away from the
cabinet, rotate the left side of the bracket
away from the washer.
6. Remove the wire harness from the water
valve coils (Blue & White wires - Cold; Orange & White wires - Hot) and remove the
clamp from the injector hose.
7. Remove two 5/16" hex head screws securing the valve to the mounting bracket.
The water valve is accessible from the front
or rear of the machine.
FRONT REMOVAL
REAR REMOVAL
1. Disconnect power to the unit.
1. Disconnect power to the unit.
2. Shut off the water supply to the inlet hoses.
2. Shut off the water to the inlet hoses and
remove the hoses from the water valve
connections of the washer.
3. Remove the front panel.
3. Remove the two ¼" hex head screws securing the water valve bracket to the cabinet (Figure 6-1).
Injector
Hose
Mounting
Screws
4. Remove dispenser bezel and raise the top
cover to expose the upper rear cabinet area
(See Front Panel & Top Cover Removal).
5. Remove the wire harness from the water
valve coils (blue & white wires - cold; orange & white wires - hot) and remove the
clamp from the injector hose. When the
valve is replaced, the hot water valve coil
is on the left.
6. Remove the two 5/16" hex head screws securing the water valve bracket to the
cabinet.
Water
Valve
Mounting
Bracket
7. Carefully lift the valve and direct the inlet
hoses through the openings in the rear
mounting bracket.
Mounting Screws
Figure 6-1
4. While pulling the lower end of the bracket
down slightly, slide the bracket to the left.
This will allow the injector hose to clear
the rear cabinet opening.
16008373-01
8. Remove the inlet hoses from the water
valve connections. If possible, clamp the
hoses shut and/or have a towel handy in
case of overspray when water pressure is
relieved.
SECTION 6. WATER CARRYING COMPONENTS
© 1998 Maytag Corporation
6-1
WATER LEVEL PRESSURE
SWITCH
The water pressure switch is located in the
console area and mounted to a galvanized
bracket secured to the rear panel of the console. The air dome hose is inserted into the
lower end of the mounting bracket (Figure
6-2). The nipple of the pressure switch is inserted into the end of the air dome hose which
is secured by the lower mounting bracket.
Bracket
Pressure
Switch
A) Slide
Switch Off
7. To replace, insert air dome hose into the
bracket. Insert the pressure switch nipple
into the air dome hose. Press the pressure switch into the bracket until it "snaps"
into place.
AIR DOME HOSE
The air dome hose connects the pressure
switch to the air dome located in the sump
area of the outer tub. Routing of the air dome
hose passes from the console down the rear
wall of the cabinet to the rear sump area of
the outer tub. Two holding clips retain the air
dome hose to the cabinet away from the belt
and pulley.
REMOVAL FROM CONSOLE
B) Rotate
Switch
1. Disconnect power to the unit.
Air Dome
Hose
2. Remove the console (See Console
Removal).
Figure 6-2
REMOVAL
3. Slide the pressure switch up on the mounting bracket, away from the air dome hose.
The mounting bracket for the pressure
switch is secured to the rear panel of the
console (See Figure 6-2).
1. Disconnect power to the unit.
2. Remove the console (See Console
Removal).
3. Slide the pressure switch up, away from
the air dome hose.
4. Remove wire harness from the pressure
switch.
5. Rotate the pressure switch 90 degrees to
disengage locking tabs on the back of the
switch from the mounting bracket.
6. The mounting bracket for the pressure
switch is secured to the rear console panel
with one screw.
16008373-01
4. Pull the air dome hose down through the
top cover opening.
REMOVAL FROM OUTER TUB
1. Disconnect power to the unit.
2. From behind the outer tub, slide off the
retainer clip securing the air dome hose
to the rear spout of the outer tub.
3. Remove one of the rear baffles.
4. Grasp and lift the airdome hose from the
sump area (See Figure 6-3).
SECTION 6. WATER CARRYING COMPONENTS
© 1998 Maytag Corporation
6-2
5. Pull the air dome and hose out through the
sump opening in the spin basket (Figure
6-3).
5. Remove all slack in the hose between the
upper and lower clips holding the air dome
hose. This reduces the potential for noise.
REPLACEMENT/ROUTING
6. Route the air dome hose into the center
rear hole in the top cover. Route toward
the pressure switch and secure the hose
to the pressure switch.
1. Thread the narrow end of the hose through
the air dome outlet in the rear of the outer
tub (Figure 6-3). Apply alcohol to lubricate the hose to ease insertion into the
outer tub air dome outlet.
NOTE: Using soap and water may lead to a
potential leak.
Spin Basket
Sump
Opening
Exposed
Rear
Baffle
Removed
DISPENSER ASSEMBLY
The dispenser assembly is located in the left
hand side of the top cover. Three bays dispense the fabric softener, bleach and detergent into the wash load. A double wax motor
mechanism directs the flow of water into each
specific bay when required for disbursement
into the wash load. When a specific fluid is
required, the water is directed into that bay.
As water fills the bay, the fluid level rises.
When the fluid reaches a specific height, it is
siphoned out into the dispenser injector hose
to the wash load.
Air Dome
Outlet
Wax Motors
Figure 6-3
Siphon Cap
Linkage
Dispenser
Top
2. Secure the retainer clip on the outside
ridge of the air dome hose.
3. Push the bent end of the air dome down
into the sump area, below the spin basket,
making sure the flat rubber tab on the air
dome is down inside the drain sump
opening.
Rotary
Nozzle
Siphon Cup
Dispenser Bottom
Figure 6-4
4. The air dome hose is retained to the
rear wall of the cabinet with two clips.
NOTE: A silver indicator mark is located
approximately 20 inches away from the air
dome. The indicator mark must be located
under the lower clip to allow the correct
amount of slack in the hose.
REMOVAL
1. Disconnect power to the unit.
2. Remove the siphon cup and cap.
3. Remove the four screws securing the dispenser bezel and assembly to the top
cover.
16008373-01
SECTION 6. WATER CARRYING COMPONENTS
© 1998 Maytag Corporation
6-3
4. Remove the front panel and top cover (See
Front Panel & Top Cover Removal).
5. Disconnect the hoses attached to the dispenser assembly.
6. While lifting, rotate the dispenser assembly 90 degrees in a counterclockwise
direction.
NOTE: The two tabs on the side wall of the
dispenser bottom may break off if the above
procedure is not followed properly.
5. Remove the hose clamp and injector hose
from the spout on the front upper area of
the outer tub.
6. In order to provide sufficient space to remove the injector, place a 5/8" - 3/4" wedge
between the spinner and the outer tub.
7. Pinch the two tabs exposed on the outer
edge of the outer tub spout and press the
injector into the tub. Reverse the previous steps to replace the injector.
PUMP
FRONT WATER FLUME INJECTOR
As water is filling the dispenser assembly,
water is also diverted to a hose leading to the
front of the outer tub.
As the water enters
the top of the outer
tub through the hose,
it passes through a
water flume. The
flume directs the water toward the front of
the tub to saturate the
clothes load.
ASSEMBLY
The pump assembly is mounted to the right
rear area of the base.
REMOVAL
1. Disconnect power to the unit.
2. Spread a towel below the drain hoses prior
to loosening the hose clamps. This will
catch any residual water left in the hoses
and sump area.
3. Remove the hose clamps and hoses from
the pump.
Figure 6-5
4. Remove the wiring harness from the pump
motor terminals.
REMOVAL
1. Disconnect power to the unit.
2. Remove the front panel and raise the top
cover to expose the upper front
cabinet area (See Front Panel & Top Cover
Removal).
5. Rotate the pump assembly in a counterclockwise direction. The support legs of
the pump are slotted to engage in keyed
slots in the base. Reverse the steps to remount the pump.
3. Remove the front shroud assembly (See
Front Shroud Assembly Removal).
4. Remove the outer tub cover (See Outer
Tub Cover Removal).
16008373-01
SECTION 6. WATER CARRYING COMPONENTS
© 1998 Maytag Corporation
6-4
Figure 6-6
Figure 6-7
CLEANING THE PUMP
The pump assembly can also be disassembled
without removing the hoses from the pump
(See Figure 6-6).
1. Depress the locking tab on the face of the
pump housing.
2. Rotate the block portion of the pump containing the motor windings toward the
front of the washer. This will disengage
the locking tabs of the pump housing from
the pump face.
4. Position the second pump near the first
pump and connect the accessory connector to the sump intake of the second pump.
Secure with the clamp in the kit.
5. Connect the drain hose to the drain outlet
of the second pump. Secure with a clamp.
6. The second pump assembly is not secured
to the washer's base frame.
7. Installation is complete.
3. Carefully remove the pump body away
from the housing. The drain impeller is
exposed for cleaning.
Pump Accessory Kit
1. Disconnect power to the unit.
2. Disconnect the drain hose from the existing pump in the washer.
3. Attach the accessory connector to the
pump drain outlet and secure with the
clamp found in the kit.
Figure 6-8
16008373-01
SECTION 6. WATER CARRYING COMPONENTS
© 1998 Maytag Corporation
6-5
DRAIN HOSE
The drain hose attaches to the pump and is
routed through the lower rear wall of the cabinet. The drain hose is protected externally by
a shield.
Drain Hose
Access
Cover
REMOVAL
1. Disconnect power to the unit.
Figure 6-9
2. Remove the four ¼" hex head screws securing the access panel to the rear wall of
the cabinet.
3. Remove the ¼" hex head screw securing
the drain hose shield. Remove shield.
4. With access into the machine compartment, spread a towel under the connection of the drain hose to the pump. Loosen
the clamp and remove the drain hose (Figure 6-10).
5. Reverse the previous steps for
replacement.
Clamp
Drain Hose
Figure 6-10
16008373-01
SECTION 6. WATER CARRYING COMPONENTS
© 1998 Maytag Corporation
6-6
16008373-01
SECTION 6. WATER CARRYING COMPONENTS
© 1998 Maytag Corporation
6-7
SECTION 7. OUTER TUB & SPINNER ASSEMBLY
Warning - Always shut off
electrical power to the unit
before beginning any service repair procedures.
REMOVAL
1. Disconnect power to the unit.
2. Remove the front panel, top cover and
front shroud (See Front Panel, Top and
Front Shroud Removal).
BAFFLES
The baffles in the spin basket distribute and
redistribute the clothes during the tumbling
action of the washer.
REMOVAL
3. Using one of the two hold down brackets
(See Figure 5-6) or one of the two front
support springs, grasp the hook of the boot
clamp spring. With the other hand, press
the wire loop into the door boot. This will
brake the wire into the door boot and not
allow the wire to slip.
1. Disconnect power to the unit.
2. The three rear baffles within the spin basket are removed by removing the two
crosshead screws securing each baffle
from inside the spin basket.
3. The three front baffles within the spin basket are removed by removing the two ¼"
hex head screws from outside of the spin
basket. To gain access, remove the outer
tub cover. The front baffle mounting
screws can now be reached through the
sump area, using a flat ratchet with a ¼"
drive socket.
DOOR
NOTE: Be careful not to bend or crease the
wire loop. If the wire loop becomes bent, the
result will be a potential leak upon replacement of the boot seal onto the outer tub
cover.
4. Pull the boot clamp spring hook toward
the wire loop and disengage the spring
from the wire loop.
5. Carefully remove the wire loop from the
lip of the outer tub cover.
NOTE: Note the orientation ribs on the outer
tub cover and the locating notches in the door
boot seal lip.
BOOT
The door boot rubber gasket provides a seal
between the outer tub assembly and the front
shroud. The boot seal is secured to the front
shroud by locking tabs on the boot seal, which
engage with slots in the shroud. Attachment
to the outer tub is by a wire loop stretched
around the perimeter of the opening in the
outer tub cover and secured with a spring.
Locking
Tabs
Boot
Gasket
Door Shrou
d
Figure 7-1
16008373-01
SECTION 7. OUTER TUB & SPINNER ASSEMBLY
© 1998 Maytag Corporation
7-1
6. Unsnap the locking tabs of the door boot
around the inside perimeter of the door
shroud (Figure 7-1).
REPLACEMENT
1. Align the door boot with the D-shape toward the front, with the flat of the D toward the bottom. Also, locate the large
tab toward the top center of the shroud.
2. Stretch the rear lip of the door boot onto
the tub cover.
3. Move the rear door boot lip along the face
of the tub cover until the locator notches
in the door boot align with the locator ribs
in the tub cover. Check alignment of the
six rib marks and reposition if necessary.
This is necessary in order to have the locking tabs on the inside perimeter of the door
boot align with the corresponding tabs on
the front shroud.
4. Carefully loop the wire loop with spring
around the lip of the outer tub cover and
place the spring at the 11:00 o'clock position, just left of the top rib of the outer tub
cover. Hook the end of the spring over the
nearest tub cover clip to hold the spring
and wire in position for final hookup to the
other end of the wire loop.
5. Using either the hold down bracket or the
outer tub spring, grasp the hook end of
the spring and apply pressure on the
clamp wire into the door boot.
6. Pull the spring hook toward the wire loop
to engage the spring with the wire loop.
NOTE: Be careful not to bend or crease the
wire loop. If the wire loop becomes bent, the
result will be a potential leak upon replacement of the boot seal onto the outer tub
cover.
16008373-01
7. Reposition the front shroud on the front
of the washer and secure (See Front
Shroud).
8. Pull the front edge of the door boot and
locate the widest locking tabs, located
at the 12, 4 & 8 o'clock positions. Insert
the locking tabs into the large interlocking slots in the shroud. (Spraying the
surface with window cleaner or a soap
solution aids reinsertion of the tabs into
the plastic front shroud.) Press the thick
rubber section of the door boot into the
groove in the shroud so the locking tabs
engage in the slots.
9. Press the remaining locking tabs into the
perimeter of the shroud.
OUTER TUB COVER
The outer tub cover has a gasket seal embedded in the outer flange of the cover to
seal the cover to the outer tub. The cover is
secured to the outer tub by means of twelve
(12) locking clips evenly spaced around the
perimeter of the cover. When the outer tub
cover is removed, access to the sump area
and the front injector flume is possible.
REMOVAL
1. Disconnect power to the unit.
2. Remove the front panel, top cover and
front shroud (See Front Panel, Top
Cover, and Front Shroud Removal).
3. Using a flathead screwdriver, slide under the clip and pry to remove. Remove
the remaining clips from the outer tub
cover.
4. Remove the cover from the outer tub.
This exposes the sump area on the floor
of the outer tub and the water injector
flume on top of the outer tub.
SECTION 7. OUTER TUB & SPINNER ASSEMBLY
© 1998 Maytag Corporation
7-2
REMOVAL
1. Disconnect power to the unit.
2. Remove the front panel, top cover, front
shroud, outer tub cover and rear baffles
(See Front Panel, Top cover, Front Shroud,
Outer Tub Cover and Rear Baffle
Removal).
3. To separate the spinner tub support from
the spinner, remove the three rear baffles
within the spin basket by removing the two
screws securing each baffle (See Baffle
Removal).
Figure 7-2
SPIN BASKET ASSEMBLY
w/BALANCE RING
The balance ring is securely fastened to the
spin basket and cannot be obtained as a separate repair part. To obtain, order complete
spin basket assembly. The balance ring is
filled with a calcium chloride solution and
baffles.
4. Remove the three locking type nuts (½"
socket) securing the spin basket to the spider assembly (Figure 7-5).
Figure 7-4
Figure 7-3
within the ring allow the fluid to disperse
within the ring evenly. By rotating the spin
basket, you can hear the fluid dispersing
within the baffles of the balance ring. This
sound is normal.
The spin basket is mounted to the spinner support by means of threaded studs on the support extending through the spin basket and
secured with nuts. The mounting nuts are
concealed under the rear baffles (Figure 7-4).
16008373-01
SECTION 7. OUTER TUB & SPINNER ASSEMBLY
© 1998 Maytag Corporation
7-3
Profile
Washer
Spinner
Support
Washer
Locking Nut
Figure 7-5
Figure 7-6
5. Remove the spin basket by lifting it off the
threaded bolts of the spinner support.
REPLACEMENT
6. When replacing the spin basket onto the
spinner support, replace the washers under the three locking type nuts. Secure
the ½" nuts firmly (18 in. lbs. torque).
DRIVE PULLEY
The drive pulley can be accessed via the rear
access panel of the washer. The pulley is secured to the shaft of the spider assembly by a
bolt. The direction of pulley rotation controls
the spin action of the spin basket.
1. Slide pulley on shaft.
2. Insert new tabbed washer and secure the
bolt with a 9/16" socketed ratchet wrench
(30 in. lbs. torque).
NOTE: If the washer is cupped, flip the
washer on the pulley so the cupped portion
extends away from the shaft. Failure to do
so can result in a binding of the spinner support shaft and seals.
1. Disconnect power to the unit.
2. Remove the rear access panel from the
washer to access the pulley area.
3. Remove the bolt and the spider shaft will
be exposed. Carefully slide the pulley off
the spider shaft, using a "rocking/side-toside" motion. If the pulley has a snug fit,
use your Spanner Wrench to apply enough
leverage to pry the pulley off the shaft
(Figure 7-6).
16008373-01
SECTION 7. OUTER TUB & SPINNER ASSEMBLY
© 1998 Maytag Corporation
7-4
SPINNER TUB SUPPORT
The spinner tub support attaches to the spin basket and the shaft of the spider extends through
a seal system to the exterior of the outer tub with a pulley attached to the end of the shaft
(Figure 7-7). This assembly supports the spin basket and transfers the rotation of the drive
pulley directly to the rotation of the spin basket.
NOTE: When the spinner tub support is removed, the shaft seal system should be replaced.
Plastic
Washer
Spin
Basket
Seal
Spacer
Sleeve
(See Figure 7-5)
Spinner
Support
Figure 7-7
REMOVAL
1. Disconnect power to the unit.
2. Remove the front panel, top cover, front shroud and outer tub cover (See Front Panel, Top
Cover, Front Shroud and Outer Tub Cover Removal).
3. Remove the drive pulley (See Pulley Removal).
4. With the pulley removed, the spin basket with the spider shaft can be pulled from the front
of the outer tub assembly.
5. To separate the spinner tub support from the spinner, remove the three rear baffles within
the spin basket by removing the two screws securing each baffle (See Baffle Removal).
6. Remove the three locking nuts (½" socket) securing the spin basket to the spider assembly.
7. Remove the shaft seal (Figure 7-8).
REPLACEMENT
1. Reverse the previous steps.
2. IMPORTANT: Secure the three locking nuts (½" socket) on the spinner tub support studs
(18 in. lbs. torque).
16008373-01
SECTION 7. OUTER TUB & SPINNER ASSEMBLY
© 1998 Maytag Corporation
7-5
SEAL SYSTEM
A multi-lipped water seal is positioned on the
tub support shaft leading to the outer tub bearing. This prevents water inside the tub from
reaching the bearings. The water seal is accessed by removing the tub support shaft. It
is comprised of a stainless steel seal face positioned on the tub support shaft, which mates
with a rubber gasket. Grease on the face of
the rubber gasket provides lubricant for the
steel seal face. The steel seal face provides
the rotating seal surface against the circular
rubber ribs in the face of the rubber seal. This
makes for three rib contacts at various diameters, providing three seals.
REMOVAL
1. Disconnect power to the unit.
2. Remove the spinner tub support with spinner (See Spinner Tub Support Removal).
Figure 7-9
4. Reach inside the outer tub bearing area
and remove the rubber seal. Discard both
the steel seal washer and the rubber seal
(Figure 7-9).
5. Position the spacer, replacement rubber
seal and steel seal washer into the outer
tub bearing area.
6. Position the spinner with spinner support
shaft into the outer tub and insert the shaft
through the seal in the rear of the outer
tub until the spinner support shaft seats
into place.
7. Reposition the drive pulley with tabbed
washer onto the spinner support shaft.
Insert the retaining bolt and tighten securely (30 in. lbs. torque). This will draw
the shaft and seals into proper alignment.
Figure 7-8
3. With a flathead screwdriver, pry the seal
carefully off the tub support shaft (Figure
7-8).
16008373-01
SECTION 7. OUTER TUB & SPINNER ASSEMBLY
© 1998 Maytag Corporation
7-6
REMOVAL OF UPPER WEIGHT
OUTER TUB ASSEMBLY
1. Disconnect power to the unit.
The outer tub assembly is suspended from two
springs positioned toward the upper front of
the cabinet and supported in the rear by two
struts which are secured to the base frame.
Two counter weights are mounted to the outer
tub from above and below the tub. The aluminum bearing housing retains both inner and
outer bearings for the spinner tub support
shafts.
2. Lift top cover (See Top Cover).
3. Remove the two ½" counter balance bolts
securing the weight to the top of the outer
tub assembly.
NOTE: The bolts screw into two nuts below
the weight, under the tub mounting pad (Figure 7-11).
Counter
Balance
Bolt
Front
Water
Flume
Upper
Weight
Displacement
Switch
Upper
Weight
Nut
Figure 7-11
REMOVAL OF LOWER FRONT WEIGHT
1. Remove the front panel (See Front Panel).
Figure 7-10
2. Remove the two bolts securing the weight
to the outer tub assembly. Use a 9/16"
socket (Figure 7-12).
BEARINGS
The bearings are not repairable or replaceable.
Replacement of the complete outer tub assembly is required.
3. Lower the front weight and guard against
hitting the motor control microprocessor
board mounted to the base assembly.
Front
Weight
COUNTER WEIGHTS
Two counter weights are secured to the outer
tub assembly. One is secured to the top of
the tub assembly and the other is secured to
the bottom of the tub assembly.
Strap
Counter Balance
Bolt
Figure 7-12
16008373-01
SECTION 7. OUTER TUB & SPINNER ASSEMBLY
© 1998 Maytag Corporation
7-7
STRUT ASSEMBLY
Isolator
Strut
Two struts are mounted to the base and inserted into rubber isolators in the rear of the
outer tub assembly. The struts provide suspension support to the outer tub assembly.
Push Rod
REMOVAL
1. Disconnect power to the unit.
Rear Strut
2. Remove the front panel, top cover and
front shroud (See Front Panel, Top Cover
and Front Shroud Removal).
3. Disconnect dispenser hoses and injector
hose connections to the outer tub.
Isolator
Lower Strut Washer
Locking Nut
4. Lean the cabinet forward to access the two
locking nuts that secure the struts to the
bottom of the base frame assembly. Use
an 8mm or ½" socket. Remove the locking nuts and lower strut washers.
5. With the washer standing upright, roll the
washer forward and off the struts, which
mount into the rubber isolators inserted
into the rear of the outer tub.
Figure 7-13
4. Release the small locking tab on top of the
switch and rotate the switch to disengage
the switch from the strut.
5. To Reinstall: Reverse the aforementioned
steps.
6. To Reinstall: Reverse the previous steps.
INERTIAL UNBALANCE SWITCH
Strut Displacement Switch
1. Disconnect power to the unit.
2. Remove the rear access panel for immediate access or remove the front panel.
3. Remove the wires to the switch.
16008373-01
The purpose of the switch is to monitor the
lateral horizontal movement of the outer tub
during spin (above 500 RPM), versus the vertical movement. When a severe amount of
motion is detected, the machine control will
implement a reduction in speed or start a redistribution of the clothes load. This is done
by gradually stopping the motor. After the
motor stops, the tumbler will alternately
tumble, first in one direction then another. After a brief time, the machine will again work
up to a full spin. Should the machine detect
another unbalance, the control will implement
another redistribution of the load.
SECTION 7. OUTER TUB & SPINNER ASSEMBLY
© 1998 Maytag Corporation
7-8
REMOVAL
REMOVAL
1. Disconnect power to the unit.
1. Disconnect power to the unit.
2. Remove the front panel and lift the top
cover (See Front Panel & Top Cover
Removal).
2. Remove the front panel and lift the top
cover (See Front Panel & Top Cover Removal).
3. The switch is located on the upper right
hand side of the outer tub assembly (Figure 7-14).
3. The switch is located on the upper right
hand side of the outer tub assembly, directly behind the right upper front suspension spring (Figure 7-15).
4. Remove the two screws securing the
switch to the outer tub assembly.
4. Remove the screw and flat washer securing the switch in place.
5. Using a flathead screwdriver, pry the
switch body from the outer tub assembly.
Outer Tub
Figure 7-14
TUB DISPLACEMENT SWITCH
Switch
The displacement switch is located on the
right hand side of the outer tub assembly, below the upper weight. The location of the
switch on the outer tub will activate the switch
whenever the outer tub assembly makes contact with the wall of the cabinet. Should contact with the cabinet occur before the machine
reaches 500 rpm, the machine control is
alerted and will reduce speed to implement a
redistribution program.
16008373-01
Figure 7-15
SECTION 7. OUTER TUB & SPINNER ASSEMBLY
© 1998 Maytag Corporation
7-9
16008373-01
SECTION 7. OUTER TUB & SPINNER ASSEMBLY
© 1998 Maytag Corporation
7-10
SECTION 8.
MOTOR DRIVE SYSTEM
Warning - Always shut off
electrical power to the
unit before beginning any
service procedures.
The motor drive system tear-down procedure
covers all components related to the drive
system, such as the drive motor, drive belt,
motor control, machine control and accelerometer switch.
Figure 8-1
DRIVE BELT
DRIVE
The drive belt has six (6) ribs which mate
with the face of the motor pulley. The belt
encircles the motor pulley and the drive
pulley of the spinner.
The drive motor is hinged into the left bottom
area of the outer tub and secured to the outer
tub by the bolt on the belt adjustment wheel.
A slot in the mounting bracket of the outer
tub allows the motor to pivot and allows
adjustment of the drive belt tension.
REMOVAL
1.
Disconnect power to the unit.
MOTOR
REMOVAL
2 . Roll the belt off the drive pulley and remove from the motor pulley.
1 . Disconnect power to the unit.
2 . Remove the front panel, rear access panel
and the front weight (See Front Panel &
Rear Access Removal).
ADJUSTMENT
Check belt tension. If loose, remove the belt,
loosen the belt adjustment wheel bolt and
rotate the wheel one notch in a clockwise
rotation. Check belt tension again. The belt
should experience no more than 1" deflection
when depressed toward the inside
(Figure 8-1).
3 . From the rear, locate the belt adjustment
wheel and note the adjustment number
aligned with the rib of the outer tub. This
will help later when the belt adjustment
wheel is placed back onto the outer tub
and the belt is remounted on the motor
and drive pulley. Remove the bolt securing the belt adjustment wheel
(Figure 8-2).
16008373-01
SECTION 8.
© 1998 Maytag Corporation
MOTOR DRIVE SYSTEM
8-1
4 . Lift the motor slightly to disengage the belt
from the motor pulley. Place motor on the
base frame.
Figure 8-3
Figure 8-2
5 . From the front, remove the wire harnesses
from the back of the motor.
MACH IN E
6 . Grasp the motor and slide it carefully from
the pivot hang holes in the outer tub.
The machine control is located in the control
console and is secured to the rear cover.
REPLACEMENT
REMOVAL
1 . Reverse the previous procedures to remount the motor.
1 . Disconnect power to the unit.
NOTE: Prior to hanging the motor, reconnect motor wire harnesses and ground wire.
2 . Prior to hanging the motor on the outer
tub, check the positioning of the rubber
motor mounts.
3 . Check belt tension. If loose, loosen the belt
adjustment wheel bolt and rotate the
wheel one notch in a clockwise rotation.
Check belt tension again. The belt should
experience no more than a 1" deflection
when depressed to the inside.
16008373-01
CO N T R O L
2 . Remove the control console (See Control
Console Removal).
3 . Remove the wiring from the machine control, paying close attention to the wire harness hookup to the control board.
4 . Remove the two 5/16" nuts securing the
board to the rear console panel.
5 . Reverse the previous procedures to remount the board.
SECTION 8.
© 1998 Maytag Corporation
MOTOR DRIVE SYSYTEM
8-2
MOTOR
CONTROL
The motor control is located behind the front
panel in the lower right hand side of the
cabinet. The assembly comprises of the
circuit board, control cover, mounting plate
and motor wire harness.
REMOVAL
1 . Disconnect power to the unit.
Figure 8-4
2 . Remove the front panel (See
See Front Panel
Removal).
3 . Remove the shield/cover from the motor
control board by depressing the locking
tab found along the lower left side of the
motor control base plate.
4 . Remove the wire harness leading to the
control console (Figure 8-4).
5 . Remove the wire harness from the motor.
6 . Remove two mounting screws in front of
the motor securing the assembly to the
base. A rear locating tab on the motor
control base engages with a slot in the
base frame.
7 . To replace, reverse the previous steps.
16008373-01
SECTION 8.
© 1998 Maytag Corporation
MOTOR DRIVE SYSTEM
8-3
16008373-01
SECTION 8.
© 1998 Maytag Corporation
MOTOR DRIVE SYSYTEM
8-4
SECTION 9. ELECTRICAL SCHEMATICS & TIMER
INFORMATION
Prior to Series 17
16008373-01
SECTION 9.
© 1998 Maytag Corporation
ELECTRICAL SCHEMATICS
9-1
TIMER CHART - Prior to Series 17
16008373-01
SECTION 9.
© 1998 Maytag Corporation
ELECTRICAL SCHEMATICS
9-2
ELECTRICAL SCHEMATIC - Series 17
16008373-01
SECTION 9.
© 1998 Maytag Corporation
ELECTRICAL SCHEMATICS
9-3
TIMER CHART - Series 17
16008373-01
SECTION 9.
© 1998 Maytag Corporation
ELECTRICAL SCHEMATICS
9-4
ELECTRICAL SCHEMATIC - Series 18
16008373-01
SECTION 9.
© 1998 Maytag Corporation
ELECTRICAL SCHEMATICS
9-5
TIMER CHART - Series 18
16008373-01
SECTION 9.
© 1998 Maytag Corporation
ELECTRICAL SCHEMATICS
9-6
ELECTRICAL SCHEMATIC - Series 19
16008373-01
SECTION 9.
© 1998 Maytag Corporation
ELECTRICAL SCHEMATICS
9-7
NOTES:
16008373-01
SECTION 9.
© 1998 Maytag Corporation
ELECTRICAL SCHEMATICS
9-8
INTRODUCTION
Attached is supplement three (16008373-03) for service manual 16008373, which
replaces supplement two (16008373-02). This Maytag Washer Service Manual
supplement covers Models MAH4000 & MAH5500A. We suggest you file this with your
16008373 Manual for reference.
Models covered in this manual supplement:
MAH4000 MAH5500A
CONTENTS
SECTION 1. MAH4000/MAH5500A CONTROL FACIA ........................................ 1
SECTION 2. SPECIFICATIONS ............................................................................. 2
SECTION 3. BASIC MACHINE OPERATION ........................................................ 3
SECTION 4. WASHER CONTROLS OVERVIEW .................................................. 3
SECTION 5. CYCLE REVIEW ................................................................................ 4
Stain Cycle........................................................................................ 4
Cycle Times ...................................................................................... 6
SECTION 6. GENERAL COMPONENT - EXPLODED VIEW ................................ 7
SECTION 7. ELECTRICAL INFORMATION .......................................................... 8
SECTION 8. WATER CARRYING COMPONENTS ............................................... 9
WATER VALVE .................................................................................. 9
DISPENSER ASSEMBLY ................................................................ 9
RECIRCULATION PUMP .................................................................. 10
DETERGENT HOSE .......................................................................... 11
SECTION 9. WIRING INFORMATION .................................................................. 14
For additional information on material covered in this manual, including safety issues,
contact:
Maytag Appliances Sales Company
240 Edwards Street, S.E.
Cleveland, TN 37311
Phone: 423-472-3333
16010199 (16008373-03)
Revised 7/00
©2000 Maytag Appliances Sales Company
1
(The following information is supplemental to the information found in the basic
manual part number 16008373.)
SECTION 1. MAH4000/MAH5500A CONTROL FACIA
SECTION 2. SPECIFICATIONS
CAPACITY
3.1 Cubic Feet
ELECTRICAL
120 Volts, 60 Hz; Requires 15 amp circuit breaker or fused electrical supply.
Power cord must be connected to a properly grounded and polarized outlet.
M O TO R
Switched Reluctance Motor controlled by a microprocessor motor control board.
Motor Pulley Ratio (Motor to Spinner RPM) 14 to 1.
Motor Input:
POWER USAGE
TUMBLER SPEED
During Wash Tumble - 170 Watts
During Rinse Tumble - 195 Watts
Top Spin - 800 Watts
(Wattage readings taken with no clothes in spin.)
Wash Tumble
Rinse Tumble
High Speed Spin
47 - 51 RPM
47 - 51 RPM
800 RPM (+ 50 RPM based upon optimum spin
performance)
WATER USAGE
Water pressure should be 20 - 120 P.S.I. (1.06-8.44 kg/cm) at inlet hose
connection. Total water usage is approximately 25 gallons, varies with clothes
load. Water fill in the spin basket with no clothes, measured near the rear seam
of the spin basket
WASH LEVEL 3-4 inches
RINSE LEVEL 4-5 inches
HOSE LENGTHS
Four foot inlet hoses with inlet washers and attached to water valve.
Drain hose attached to pump and will accommodate 36" drain stand pipe.
DIMENSIONS
Cabinet Dimensions: 27" (68.58cm) W x 271/2" (69.85cm) D x 36" (91.44cm)H
WEIGHT (Approx.)
Uncartoned 190 lb. (86 kg.) Approx.
Crated 200 lb. (91 kg.) Approx.
SCREW & BOLT
TORQUES
Bolt, Counter Weight
Bolt, Spin Pulley
Bolt, Belt Adjuster
Screw, Front Baffle
Screw, Rear Baffle
Clamp, Hoses
Nuts, Spinner Support
Nuts, Suspension struts
(+ 3 in. lbs.)
(+ 3 in. lbs.)
(+ 10 in. lbs.)
(+ 3 in. lbs.)
(+3 in. lbs.)
16010199 (16008373-03)
Revised 7/00
7 in. lbs.
30 in. lbs.
90 in. lbs.
25 in. lbs.
18.5 in. lbs.
15 + in. lbs.
18 in. lbs.
7 in. lbs.
(+ 3 in. lbs.)
(+ 3 in. lbs.)
©2000 Maytag Appliances Sales Company
2
SECTION 3. BASIC MACHINE OPERATION
The model MAH4000 and MAH5500A are similar to the MAH3000 washer, with the exception
being the MAH4000 and MAH5500A have a recirculation pump in series between the outer
tub outlet and the drain pump. When the water pressure switch becomes satisfied (Series 11
and later on the MAH4000 and all the MAH5500A), power is then applied to the recirculation
pump. The recirculation pump draws water from the bottom of the outer tub and circulates the
water up through the detergent hose, then into the top of the outer tub. By doing this, the
washer is able to provide a more even distribution of detergent throughout the wash load.
SECTION 4. WASHER CONTROLS OVERVIEW
The software of the MAH4000 and MAH5500A models is slightly different than the software
used in the MAH3000 washer. Fabric Selections on the control console were changed from
Cotton/Sturdy to Whites, Easy Care/Perm Press to Colors, Delicates remained the same.
Series 10 of the MAH4000 washer allowed the recirculating pump to be directly controlled by
the timer. (Figure 4-1)
Series 10
(MAH4000 only)
Figure 4-1
Series 11 & Later
(MAH4000 & MAH5500A)
Figure 4-2
16010199 (16008373-03)
Revised 7/00
©2000 Maytag Appliances Sales Company
3
A new Stain Cycle and revised tumble patterns were introduced and will be described
in the following pages.
At series 11 the timer was changed, wire harness revised and the schematic was
changed. The timer cams were changed in the timer, the wire harness changed to pull
wires out of the timer connector and the pump is now in series with the pressure
switch, also an extra wire was jumpered across the pressure switch. Now the recirculating pump is controlled through the pressure switch (Figure 4-2). This was done to
force the washer to fill with water prior to starting the recirculation pump.
SECTION 5. CYCLE REVIEW
Figure 5-1
Cycles on the Fabrics switch now list the cycles according to how clothes are
sorted. This simiplifies how to select the cycles in doing the wash. A new
Stain Cycle was added to the Option Switch which adds cycle wash time, various tumble patterns and an additional rinse with longer tumble times during the
rinse. (See Figure 5-1)
16010199 (16008373-03)
Revised 7/00
©2000 Maytag Appliances Sales Company
4
Cycle Times:
All Wash Time/Total Wash Cycle
Non-Max
Extract
Cotton/Sturdy
Easy Care/
Perm Press
Delicates
Hand Washables
Heavy Wash
23.0/49.0
20.0/45.5
20/46.5
Not Applicable
Normal Wash
17.0/43.0
14.0/39.5
14.0/40.5
Not Applicable
Light/Quick
Wash
11.0/37.0
8.0/33.5
7.0/34.5
Not Applicable
Final Spin
(RPM/Min)
800/3.5
600/3.0
500/4.5
Not Applicable
Heavy Wash
23.0/46.0
20.0/41.5
20.0/42.0
20.0/43.0
Normal Wash
17.0/40.0
14.0/35.5
14.0/36.0
14.0/37.0
Light/Quick
Wash
11.0/34.0
8.0/29.5
8.0/30.0
8.0/31.0
Final Spin
(RPM/Min)
800/4.0
600/3.5
500/5.0
500/5.0
Notes:
1. The main wash times listed include 2 minutes of bleach fill and tumble time.
2. The total cycle times are approximate and will vary based on water fill times, due to
types of clothing loads and the time for the door lock system to retract at the end of
the cycle.
3. The main wash time is affected significantly if the machine control detects an excessive amount of suds via a loss of motor torque. The washer will go into a suds
reduction routine, consisting of a series of additional rinse and partial drain cycles to
reduce the suds present. (See Troubleshooting & Diagnosis - Clothes Wet at End
of Spin)
Tumble Pattern - Number of seconds tumbling/
Number of seconds of pause between tumbles.
Cotton/Sturdy
Easy Care/
Perm Press
Delicates
Hand Washables
7/3
5/3
6/24
3/27
16010199 (16008373-03)
Revised 7/00
©2000 Maytag Appliances Sales Company
5
Stain Cycle:
General overview of Stain Cycle:
1) Tumble in the “normal” tumble pattern until it has completed filling
plus 3 minutes.
2) Tumble for an additional 15 minutes with a 6T/24P tumble pattern.
3) Return to selected tumble pattern and proceed with remainder of the
wash time preselected.
4) Bleach fill and first rinse fill temperature will be the same as the wash fill
temperature.
5) Rinse times (including fills) are now 5-1/2 minutes, 4 minutes, 4
minutes and 4-1/2 minutes.
6) The fourth rinse is forced, which would be warm if warm rinse selected.
(Colors will not default to cold on the 4th rinse.)
The following is an example of a Stain Cycle:
Whites, Warm/Cold, Stain Cycle selected on timer, Extra Rinse not selected.
C yc l e
Function
Stain Cycle Option Switch
"Not selected"
Fill Time
20 Minutes @ 7T/3P
(7T=7 second tumble, 3P=3 second
pause)
Stain Cycle Option Switch
"Selected"
Fill Time
3 Minutes @ 7T/3P
15 Minutes @ 6T/24P
17 Minutes @ 7T/3P
Bleach/
Tumble
2 Minutes
2 Minutes
1st Rinse
2 Minutes Fill & Tumble
5-1/2 Minutes Fill & Tumble
2nd Rinse
2 Minutes Fill & Tumble
4 Minutes Fill & Tumble
3rd Rinse
2-1/2 Minutes Fill & Tumble
4 Minutes Fill & Tumble
Fill/Wash
4th Rinse
4-1/2 Minutes Fill & Tumble
Final Spin
6-1/2 Minutes
6-1/2 Minutes
Total Run
Time:
__________
46 Minutes
_________
74 Minutes
Suds detection during stain cycle:
1. Torque baseline is set during the first 3 minutes of Wash cycle after the washer is
filled.
2. Suds detection is frozen during 15 minutes of the 6/24 tumble action during Wash/
Fill cycle.
3. Suds detection begins when cycle resumes the initial selected tumble pattern .
16010199 (16008373-03)
Revised 7/00
©2000 Maytag Appliances Sales Company
6
SECTION 6. GENERAL COMPONENT - EXPLODED VIEW
Component Identification & Location:
16010199 (16008373-03)
Revised 7/00
©2000 Maytag Appliances Sales Company
7
SECTION 7. ELECTRICAL INFORMATION
FUNCTION
MACHINE
CONTROL
BOARD
TERMINAL/WIRE
MACHINE
CONTROL
BOARD
TERMINAL/WIRE
VOLTAGEAPPROX.
(When Activated)
TIMER CONTACT
Colors
(Fabric Switch)
Line Relay NO
(GY 26)
P3/2 (PK 37)
24 VDC
Not Involved
Delicates
(Fabric Switch)
Line Relay NO
(GY 26)
P3/6 (OR 38)
24 VDC
Not Involved
Hand Washables
(Fabric Switch)
Line Relay NO
(GY 26)
P3/8 (BR 39)
24 VDC
Not Involved
W hites
(Fabric Switch)
Line Relay NO
(GY 26)
P3/2 (PK 37)
P3/6 (OR 38)
P3/8 (BR 39)
0 VDC
0VDC
0VDC
Not Involved
Signal ON/OFF
(Options Switch)
Line Relay NO
(GY26)
P2/1 (PU 21)
24 VDC - ON
0 VDC - OFF
Not Involved
Extrac Rinse
(Options Switch)
P5 (W H 11)
P7/8 (PK 19)
120 VAC
12B (GY 22)
Stain Cycle
(Options Switch)
Line Relay NO
(GY 26)
P3/* (BR39)
24 VDC
Not Involved
Max Extract
(Options Switch)
Line Relay NO
(GY26)
P2/3 YL 20)
24 VDC
Not Involved
Push To Start
Switch
(W hen Pressed)
P5 (W H 11)
P1/3 (YL 28 or
RD 28)
120 VAC
Not Involved
Unbalance Control
Line Relay NO
(GY 26)
P2/4 (OR 40)
24 VDC
Not Involved
Door Lock - Spin
P3 (1)
P3/7 (YL 36)
24 VDC
Not Involved
Machine Control &
Motor Control
Power
P5 (W H11)
Line Relay Com
(BK 27)
120 VAC
Not Involved
Hot Water Valve
P5 (W H11)
P7/1 (OR7)
120 VAC or
500-1000 Ohms
Not Involved
Cold Water Valve
P5 (W H11)
P7/2 (BU 9)
120 VAC or
500-1000 Ohms
Not Involved
Door Lock Wax
Motor
P5 (W H11)
P7/4 (BR 14)
120 VAC
Not Involved
Bleach Water
Valve
P5 (W H11)
Not Involved
120 VAC
2T (BR 5)
Softener Water
Valve
P5 (W H11)
Not Involved
120 VAC
2B (YL 6)
Delay Light
Line Relay NO
(GY 26)
Not Involved
120 VAC
4T (OR 2)
16010199 (16008373-03)
Revised 7/00
©2000 Maytag Appliances Sales Company
8
SECTION 8. WATER CARRYING COMPONENTS
Warning - Always shut off
electrical power to the unit
before beginning any service repair procedures.
&2,/:$7(59$/9(
7+(50,6725
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WATER VALVE
The water valve is accessible from the
front of the machine. The flow rate of the
dispenser 3 gpm.
Removal
1. Discontinue power and water to the
machine.
2. Remove the front panel and lift the top
cover.
3. Remove the wire harness connections
to the water valve solenoids.
4. Loosen and remove the hose clamps
on the inlet hoses leading away from
the water valve.
5. Locate and loosen the valve mounting
screw by turning the screw at least
three full turns.
NOTE: The mounting screw serves
as a locating pin to hold the valve in
position on the mounting bracket. By
partially removing the screw, the
water valve can now be slid to the
left and removed from the bracket
(Figure 8-1).
16010199 (16008373-03)
Revised 7/00
02817,1*
6&5(:
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:DVK
Figure 8-1
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 water valve.
8. To reinstall, reverse the aforementioned procedure.
DISPENSER ASSEMBLY
The wax motor and linkage system designed for proper dispersing of the water
into the bleach and fabric softener dispensing cups has been eliminated. The
new system uses a 4 coil water valve with
designated inlet hoses leading to each
dispensing cup. The 4 coil water valve
operates like a 2 coil water valve. The
two water valve coils are individually
dedicated to dispensing water through
the bleach and fabric softener dispensing
cups. When either of these valves is
open, part of the flow will be routed
through the dispenser cup. A portion of
the flow will still be routed through the
detergent wash area.
9
©2000 Maytag Appliances Sales Company
DISPENSER
FLUME
FABRIC
SOFTENER
INLET HOSE
DISPENSER
BOTTOM
DETERGENT
WASH INLET
HOSE
RECIRCULATION PUMP
The Recirculation Pump is accessible
from the front or the rear of the machine.
The pump is connected in series with the
outer tub pump hose and the drain hose.
(See Figure 8-4)
BLEACH
INLET HOSE
Figure 8-2
As a result of this revision, a new dispenser bottom, water valve and hoses
were introduced. (See Figure 8-2)
OPERATION:
When Bleach or Fabric Softener is required to dispense, the dedicated solenoid on the water valve is activated the
same as the previously used wax motor.
Water is directed to dedicated spouts on
the dispenser bottom. (See Figure 8-3)
Inside the dispenser bottom, water is
directed into the designated channels
leading to the siphon cup assembly.
FABRIC
SOFTENER
BLEACH
Figure 8-4
1. Disconnect power and water to the
machine.
2. Remove the front panel.
3. Lay a towel under the tub to pump
hose and loosen the clamp on the
pump connection to the hose.
4. Loosen the clamp on the detergent
hose connected to the side of the
recirculation pump.
5. Lift the recirculation pump at an angle
to disengage the locating tab of the
mounting bracket from the baseframe.
(See Figure 8-5)
DISPENSER
BOTTOM
(TOP VIEW)
NOZZLE WAS
REMOVED
Figure 8-3
16010199 (16008373-03)
Revised 7/00
©2000 Maytag Appliances Sales Company
10
DETERGENT HOSE
The detergent hose leads from the recirculation pump up the rear of the washer
cabinet and leads to the top of the outer
tub assembly. The hose provides a path
for the water to recirculate from the lower
part of the outer tub assembly to the
enter on top of the outer tub assembly.
Note: Small indicator marks are painted
on the hose to locate and properly position the metal mounting clips onto the
hose.
Figure 8-5
DETERGENT HOSE
6. To remove the pump from the mounting bracket, pull down on the mounting tabs and slide the pump off the
mounting bracket. (See Figure 8-6)
INDICATOR
MARK
RECIRCULATION PUMP
Figure 8-7
Removal
Figure 8-6
1. Disconnect power and water to the
washer.
2. Remove the detergent hose from the
recirculation pump.
NOTE: Indicator mark on hose for
reinstallation.
16010199 (16008373-03)
Revised 7/00
©2000 Maytag Appliances Sales Company
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 Figure 8-8)
Note: When reinstalling clip to
cabinet ensure the clip is approximately 1 inch up from the inside
corner of the access opening to
prevent kinking of the hose.
5. The detergent hose then goes vertically to the upper right rear flange of
the cabinet and is retained by two
metal clips. Indicators are on the hose
showing the proper positioning of the
clips on the hose.
NOTE: The upper left clip should be
positioned directly above the top air
dome hose retainer.
(See Figure 8-11 & 8-12)
Figure 8-10
Figure 8-8
4. Follow the detergent hose vertically up
to the air dome hose mounting bracket.
The detergent hose is tucked behind
the air dome hose. (See Figure 8-9)
Figure 8-11
Figure 8-9
16010199 (16008373-03)
Revised 7/00
6. The detergent hose turns 90 degrees
toward the front of the washer and
passes through the saddle horn on the
top of the outer tub. Unsnap the hose
from the saddle horn.
(See Figure 8-12)
©2000 Maytag Appliances Sales Company
12
Figure 8-12
7. The saddle horn is secured to the top
of the outer tub with a screw.
NOTE: The upper wire harness for
the unbalance circuit is snapped into
the saddle horn with the detergent
hose.
8. Loosen the clamp on the detergent
hose on the outer tub and remove the
hose.
9. To reinstall, reverse the removal steps
taking note of the indicators on the
hose in reference to the mounting
clips, making sure the hose does not
kink above the recirculation pump.
16010199 (16008373-03)
Revised 7/00
©2000 Maytag Appliances Sales Company
13
SECTION 9. WIRING INFORMATION
Please refer to the technical schematic packed in the control console in the washer for
up to date wiring information for the product your are servicing. The schematics on the
following pages are only a general reference at the time this manual was printed.
16010199 (16008373-03)
Revised 7/00
©2000 Maytag Appliances Sales Company
14
SERIES 10 - SCHEMATIC (MAH4000 only)
16010199 (16008373-03)
Revised 7/00
©2000 Maytag Appliances Sales Company
15
SERIES 11 (MAH4000 and MAH5500)
16010199 (16008373-03)
Revised 7/00
©2000 Maytag Appliances Sales Company
16
SERIES 10 - TIMER CHART (MAH4000)
16010199 (16008373-03)
Revised 7/00
©2000 Maytag Appliances Sales Company
17
SERIES 11 - TIMER CHART (MAH4000 & MAH5500A)
16010199 (16008373-03)
Revised 7/00
©2000 Maytag Appliances Sales Company
18
16008373-05
MAYTAG
New Century
Neptune Washer
Service Manual
Supplement
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.
16010486
(16008373-05)
©2001 Maytag Appliances Sales Company
INTRODUCTION
Attached is supplement five (16008373-05) for service manual 16008373, which in
addition to supplement three (16008373-03). This Maytag Washer Service Manual
supplement covers Models MAH5500B & MAH7500A. We suggest you file 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 issues,
contact:
Maytag Appliances Sales Company
240 Edwards Street, S.E.
Cleveland, TN 37311
Phone: 423-472-3333
16010486 (16008373-05)
Revised 02/01
©2001 Maytag Appliances Sales Company
iii
16010486 (16008373-05)
Revised 02/01
©2001 Maytag Appliances Sales Company
iv
SECTION 1. GENERAL INFORMATION
MAH5500B CONTROL FACIA
(LED Screen)
MAH7500 CONTROL FACIA
(LCD Screen)
SPECIFICATIONS
CAPACITY
3.1 C ubic Feet
ELECTR ICAL
120 Volts, 60 Hz; Requires 15 amp circuit breaker or fused electrical supply.
Power cord must be connected to a properly grounded and polarized outlet.
MOTOR
Switched Reluctance Motor controlled by a microprocessor motor control
board. Motor Pulley Ratio (Motor to Spinner RPM) 14 to 1 (MAH5500B) 14.1 to
1 (MAH7500A)
Motor Input:
POWER US AGE
TUMB LER S PEED
During Wash Tumble - 170 Watts
During Wash Tumble w/heater - 1300Watts
During Rinse Tumble - 195 Watts
Top Spin - 800 Watts
(Wattage readings taken with no clothes in spin.)
Wash Tumble
Rinse Tumble
High Speed Spin
47 - 55 RPM
47 - 55 RPM
800 RPM (+ 50 RPM based upon optimum spin
performance) LED Washer (MAH5500B)
1000 RPM No tuning of system at 1000 rpm.
LC D Washer (MAH7500A)
WATER US AGE
Water pressure should be 20 - 120 P.S.I. (1.06-8.44 kg/cm) at inlet hose
connection. Total water usage is approximately 25 gallons, varies with clothes
load. Water fill in the spin basket with no clothes, measured near the rear seam
of the spin basket
WASH LEV EL 2-3 inches
RINSE LEV EL 3-5 inches
HOS E LENGTHS
Four foot inlet hoses with inlet washers and attached to water valve.
Drain hose attached to pump and will accommodate 36" drain stand pipe.
D IMENS IONS
C abinet Dimensions: 27" (68.58cm) W x 271/2" (69.85cm) D x 36" (91.44cm)H
WEIGHT (Approx.)
Uncartoned 177 lb. (80kg.) Approx.
C rated 187lb. (85kg.) Approx.
S CR EW & B OLT
TOR QUES
Bolt, C ounter Weight
Bolt, Spin Pulley
Bolt, Belt Adjuster
Screw, Front Baffle
Screw, Rear Baffle
C lamp, Hoses
Nuts, Spinner Support
Nuts, Suspension struts
(+ 3 ft. lbs.)
(+ 3 ft. lbs.)
(+ 2 ft. lbs.)
(+ 3 in. lbs.)
(+3 in. lbs.)
16010486 (16008373-05)
Revised 02/01
7 ft. lbs.
38 ft.lbs.
22 ft. lbs.
25 in. lbs.
18.5 in. lbs.
15 + in. lbs.
18 ft. lbs.
7 ft. lbs.
(+ 3 ft. lbs.)
(+ 3 ft. lbs.)
Section 1. General Information
©2001 Maytag Appliances Sales Company
1-1
BASIC MACHINE OPERATION
Models MAH5500B and MAH7500 are similar to the MAH4000 washer, with the exception
being they do not have recirculation of the wash water. A special sump cap is placed directly
above the sump area which catches the detergent and allows for a better mixing of the
detergent and the wash water. The door lock mechanism was updated from a wax motor
system to a solenoid, resulting in faster locking and unlocking of the door. The water level
pressure switch was relocated from the console to the top of the pump, thus eliminating the
airdome hose. The motor drive system was changed to a sensorless system, thus eliminating
the tach sensor in the motor in the harness leading to the motor control board. Heater with
thermistor was added to the sump area of the tub to heat the wash water on the MAH7500A
model.
General Flow Of A Complete Wash Cycle
There are several user selections which modify the main wash. Fabric selection impacts tumble
pattern. Wash/rinse temperature selection determines water fill temperature. Soil level and
quick wash selections determine wash time. The Stain cycle and Presoak options add additional time with a special tumble pattern to the main wash. The stain cycle option also adds
rinse time to non-heavy cycles and some warmer rinses. The Quick cycle reduces wash time
and only has two rinses. For this cycle, less detergent 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 the user selections.
5) After 30 seconds the door will be locked and the machine will tumble at the Handwash wash
tumble pattern (less aggressive) until the machine is at wash level. The exception would be
if the Cotton/Sturdy is selected or Quick cycle and the washer would have a 7/3 tumble
pattern. Note: No permanent locking, tumbling, or spinning shall be done for 30 seconds
after any cycle is started or re-started. Filling and draining will be allowed in this initial
period. Once filled, the tumble pattern and the total wash time depends on the user selections. A Wash Tumble Flush occurs shortly after the water reaches the wash fill level. A
Wash Tumble Flush will have special tumbling speed to ensure the proper mixing of the
detergent.
7) Shortly before the end of the wash cycle bleach will be dispensed.
8) The washer will then drain and spin.
9) The washer will fill tumble, drain, and spin repeatedly to rinse the clothes. The number of
rinses and spin speeds will be dependent on user selections. Toward the end of the wash
and rinse spin, the cold water valve will be turned on for 6 seconds. During the final rinse the
machine will perform a tumble flush to clean the machine.
10) A final drain and high speed spin will be performed to extract the water from the clothes.
16010486 (16008373-05)
Revised 02/01
Section 1. General Information
©2001 Maytag Appliances Sales Company
1-2
CYCLE SEQUENCES
Basic Tumble Patterns:
Wash Time Tumble:
Wash S elections
Tumbling Time
a) Extra Heavy
(LC D Model Only)
32 minutes
wash tumble
2 minute bleach
fill.
27 minutes
wash tumble
2 minute bleach
fill.
b) Heavy
14 minutes
wash tumble
2 minute bleach
fill.
c) Normal
8 minutes wash
tumble
2 minute bleach
fill.
d) Light
3 minutes wash
tumble
2 minute bleach
fill.
e) Quick
Rinse Tumble Times:
R inse
S elections
Tumbling Time
1st Rinse - 3 minutes
a) Normal or
2nd Rinse - 3 minutes
Light, no stain Extra Rinse - 3 minutes
3rd Rinse - 3 minutes*
b) Stain, Extra
Heavy or
Heavy
c) Quick
d) Rinse
16010486 (16008373-05)
Revised 02/01
B asic Tumbling
Pattern and S peed
a) C otton/Sturdy
7/3 at 47 rpm for
b) Wrinkle Free
5/3 at 51 rpm
c) Delicates
6/24 at 51 rpm
d) Handwash
3/27 at 51 rpm
e) Fill for all except 3/27 at 51 rpm
C otton/Sturdy and
Quick Wash
f) Quick Wash
(regardless of all
fabric selections)
1st Rinse - 2 minutes
Extra Rinse - 2 minutes
2nd Rinse - 2 minutes*
All Rinses - 3 minutes
7/3 at 51 rpm
Note: “7/3” means 7 seconds on, 3 seconds off,
reverse direction and repeat.
Number of Rinses:
Extra Quick R inse S pin Extra- - S tain
Heavy,
R inse
Heavy,
normal,
or light
X
No. of
R inses
3
X
2
X
1st Rinse - 4.5 minutes
2nd Rinse - 4.5 minutes
Extra Rinse - 4.5 minutes
3rd Rinse - 4.5 minutes*
Note: The final rinse time does not include the
Tumble Flush time. Tumble Flush time will add a
minimum of 30 seconds to a maximum of 60
additional seconds to the final rinse time. (See
definition of Tumble Flush)
*
Fabric S elections
X
3
X
1-4
X
0
X
X
X
X
X
X
X
X
X
Section 1. General Information
©2001 Maytag Appliances Sales Company
4
X
4
X
4
2
MAH5500B
2-4
MAH7500
1-3
The water temperature entering the washer during rinse is tempered. The following
table shows the temperature based on the user selections.
INPUT WATER TEMPERATURE
Extra H eavy, Quick,
heavy, normal, or light
Option Selected
Selected
Temperature
R inse
Stain
C y cle
R inse w ater
temperature
Y
H/C , W/C , and
C /C
N
N
Non-te mpe re d cold.
Y
W/W
N
N
80°F for the final rinse
only. Non-te mpe re d cold
for all othe r rinse s.
N
H/C , W/C , and
C /C
Y
N
Non-te mpe re d cold
N
W/W
Y
N
All rinse s 80 °F
H/C , W/C , and
C /C AND W/W
N
Y
The first rinse is the
same as the wash
te mpe rature . The re st of
the rinse s are the same
as if stain cycle was not
se le cte d.
Y
(he avy, normal, and light
only, quick is not allowe d
with stain)
ON/OFF SEQUENCE OF PUMP DURING SPIN CYCLE
S pin S peed
D rain Pump
a) <540 rpm
On continuous
b) <100 rpm when in redistribution.
Off
c) >=540 rpm and during the first
minute
15 second on and 15 second off
duty cycle.
d) >=540 rpm and 30 seconds after
the machine has reached the target
sp e e d .
15 second on and 45 seconds off
duty cycle.
e) C oast down during final spin
Off until machine reaches 300 RPM
and then on until the machine
reaches 0 RPM.
f) C oast down during all other spins
On continuous until next step in the
cycle
16010486 (16008373-05)
Revised 02/01
Section 1. General Information
©2001 Maytag Appliances Sales Company
1-4
SECTION 2. WASHER CONTROLS OVERVIEW
The software for the MAH5500B and the MAH7500 is different than the MAH4000
washer. The new controls operate via a membrane pad on the MAH5500 and a touch
screen/membrane pad on the MAH7500 washer.
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 remembered and based on
the previous fabric type selected.
• The user can select another wash cycle
during the operation and the control will
determine the completion of the cycle.
• The control panel displays the estimated
time remaining in the cycle
• The control panel stores codes to aid the
service person in diagnostics.
• The control panel detects hose reversal
and changes the fills as necessary.
Features of MAH7500 (LCD Washer):
• A membrane switch (keyboard) with a
LCD display and touch screen.
• The user can select a delay start.
• The wash/rinse temperatures and wash
cycles are remembered and based on
the previous fabrics type selected.
• The control panel drives a heater located
in the sump.
• 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.
BASIC CONTROL BOARD PHILOSOPHY FOR BOTH WASHERS:
Figure 1
16010486 (16008373-05)
Revised 02/01
Section 2. Washer Controls Overview
©2001 Maytag Appliances Sales Company
2-1
USER INTERFACE
SELECTIONS: (LED Washer)
machine at night or some other time to
better suit the needs of the household.
The user can select the setting of several
features while in the User Interface Active
Mode or the Main Wash Cycle. The user
sets the features by pressing a key on the
keypad and the machine goes into the set
mode. If the machine is in the main wash
cycle, additional criteria may be applied
prior to changing the feature. The modes
to set a feature are:
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.
•
•
•
•
•
•
Fabric Mode
Temperature Mode
Cycles Mode
Delay Mode
Signal Mode
Options Mode
FABRIC MODE
When a Fabrics key is pressed, the last
cycle that was not a Quick, Rinse, or Spin
cycle, will be recalled. Each Fabrics key
(Cotton/Sturdy, Wrinkle Free, Delicates,
Handwash, ) remembers the wash/rinse
temperature settings, max extract option,
extra rinse option, and wash settings.
TEMPERATURE MODE
Four discrete wash/rinse temperature
selections are provided, each with an
associated LED. Up and down arrow keys
are used to make the wash/rinse
selection. Holding down one of these
keys will advance at a rate of one level per
half second. Wash/rinse selection will not
wrap around.
CYCLES MODE
When a wash key is selected (heavy,
normal, light, quick, rinse, or spin), the
LED shall be lit and remain lit until another
wash cycle is selected. The wash LEDs
do not change during the wash cycle.
DELAY MODE
The delay start option is primarily used
when a person wants to run the washing
16010486 (16008373-05)
Revised 02/01
The delay time (in hours) shall be shown
in left digit and an ‘H’ (for hours) shall be
shown in the right digit of the display.
If delay wash has been selected, but Start/
Pause has not been pressed to initiate it,
then the Start/Pause LED will flash off and
on to indicate that it must be pressed.
The Start/Pause key must be pressed to
initiate a delay wash cycle. Once it has
been pressed, the Start/Pause LED will
stay on constant and the time will begin to
count down and the display will indicate
hours of delay remaining. When one hour
of the delay is reached, the time will be
shown in minutes in the two digits of the
display.
Note: If a regular cycle has been
running for more than five seconds, the
delay wash key will be locked out.
SIGNAL MODE
The volume level of the end of cycle
signal is adjustable. The sound ranges
from “off” to “3” in increments of 1. The
user will be able to select the plus (+) to
increase the volume level. The user will
be able to select the minus (-) to decrease
the volume level. When the user first
presses either of these keys, the current
end of cycle signal will be demonstrated.
Subsequent presses of either the plus or
minus button within 5 seconds of the
previous key press will increase or
decrease one level. The new end of cycle
shall sound.
Section 2. Washer Controls Overview
©2001 Maytag Appliances Sales Company
2-2
OPTIONS MODE
When the extra rinse key is selected, an
extra rinse is added for the wash cycles.
(Page 1-3 Extra Rinse Table)
When max extract speed key is selected,
the max extract profile will be used for
spin cycle based on the fabric selection.
When the stain cycle key is selected, the
water input temperature, the wash time,
the tumbling pattern, speed, and amount
of rinses may be modified.
When the presoak key is selected, a
presoak is added before the main wash
cycle.
DISPLAY CHARACTERISTICS
Door Locked LED:
When the door is finally locked, the door
locked LED is lit. When the door is finally
unlocked, the door locked LED is not lit.
Two Digit Display:
The display shows the estimated time
remaining in the total cycle in minutes.
This time will count down during the total
time cycle.
If the selected Wash cycle button is
pushed, the estimated time remaining in
that wash cycle shall be displayed for 5
seconds and the associated Wash level
LED will flash. After 5 seconds, the
estimated time remaining for the total
cycle will be displayed and the wash level
LED will return to being on constant.
16010486 (16008373-05)
Revised 02/01
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
recalculated and displayed. The
remaining time is calculated by applying
the actual time in the new cycle. If the
user had originally selected Heavy wash
and 3 minutes has elapsed and the user
then selects Normal wash, the time
remaining will be 12 minutes. (e.g. 15
minutes Normal wash minus 3 actual
minutes = 12 minutes). If the user had
originally selected Quick wash, 1 minute
had elapsed, and then the user selects
Heavy wash, the new remaining time will
be 19 minutes (20 minutes heavy wash
minus 1 minute actual time).
The main Wash key may not be changed if
there is less than 2 minutes time
remaining in the wash cycle (Bleach Fill).
Although the button can be depressed,
the LED status will change but the time
remaining or wash cycle will not change.
USER INTERFACE SELECTIONS:
(LCD Washer)
All selections described under the LED
washer section are familiar except in the
Delay mode. In this mode, time is
increased in 15 minute increments up to
12 hours.
Section 2. Washer Controls Overview
©2001 Maytag Appliances Sales Company
2-3
INPUT MODIFICATIONS DEFINED
PRESSURE SWITCH INPUT
The pressure switch is a two level pressure switch. (Figure 4-2) The low level contacts
provide a path for a 24 VDC sensing circuit, the high level contacts provide an electrical
path for 110 VAC to the water valve relays on the board. Another sensor on the board
monitors the high level circuit to determine when the high level is reached and the
circuit is opened. Thus, shutting off the water valve relays.
During wash fill, the low level of the pressure switch is sensed with 24 VDC and provides
an indication to the control board the water level has satisfied the low level. Once
satisfied, the 24 VDC circuit is opened. The board then opens the water valve relays and
shuts off the water valves.
During rinse fill, 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. The machine control uses
this input signal to regulate the water
temperature with the warm or cold wash
and warm rinse temperature selections
(See Water Valve Outputs).
On the MAH7500 model, another
thermistor is located on the heater
assembly. The machine control board
uses this input signal to maintain the
water temperature in the sump area of
the outer tub, by cycling the heater on/
off.
16010486 (16008373-05)
Revised 02/01
DOOR LOCK SWITCH INPUT
When input is present, this is indication
the washer door is locked. The machine
controller will not command the spinner
to tumble or spin when the door lock
input is not present.
If the door is opened during a cycle,
the control will pause the cycle on the
MAH5500B.
Section 2. Washer Controls Overview
©2001 Maytag Appliances Sales Company
2-4
START/PAUSE INPUT
The start/pause input is selected on the
membrane switch for both washers. If
this input is initially selected the machine
control will begin the wash cycle
sequence as defined by the user input
selections. If this input is selected when a
cycle is in progress, the machine control
will pause the cycle and unlock the door
when it is safe to do so.
(Note: Machine control board is
powered up all the time. There no
longer is a line relay used, as opposed to
the MAH3000, 4000 and 5500A models.)
TACH INPUT
The tach input is a feedback signal from
the motor control. It provides eight
pulses per revolution of the switched
reluctance motor. The motor runs at 14
times the speed of the spinner (14:1 belt
ratio). The tach input is used for
monitoring speed and out-of-balance
detection (See Tachometer Circuit
Diagnostics).
If the machine control commands a motor
speed and direction but does not sense a
tach input signal within 2 or 3 seconds, it
will assign a HELP code number and
perform 10 retries. If unsuccessful, this
generally indicates a locked rotor or a
malfunction in the motor control.
If the machine control commands a coast
down from final spin speed but is still
receiving a tach input signal after two
minutes, it will log appropriate service
codes.
OUTPUT MODIFICATIONS
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
terminals on the solenoid. Power is not
continuously applied to the solenoid,
because this would damage the solenoid.
END-OF-CYCLE SIGNAL OUTPUT
The End-Of-Cycle Signal Output is an
internal signal on the machine control
between the microprocessor and
annunciator. The end-of-cycle signal
sounds when a wash cycle is finished.
The end-of-cycle signal sounds as four
pulses on the MAH5500B and 3 pulses on
the MAH7500 in a 0.5 second intervals. If
the door is opened right at the end of the
cycle or during the end of cycle beeps,
then the signal will stop on the MAH5500B
only. If the start/pause key is pressed
near the end of the cycle, the end of cycle
signal will not occur unless the cycle is
restarted and allowed to finish. If the Off
key is pressed, the end of cycle signal will
not occur. The end of cycle signal will
occur when the door is unlocked and
ready to open on the MAH5500B. On the
MAH7500, the signal sounds then the
door is unlocked.
HEATER OUTPUT (LCD Washer only)
The machine control board turns the
heater on to heat the wash water during
the main wash until the temperature
reaches the targeted main wash
temperature. The heater is turned back
on at any point the temperature falls 5º F
16010486 (16008373-05)
Revised 02/01
Section 2. Washer Controls Overview
©2001 Maytag Appliances Sales Company
2-5
below the main wash target temperature.
The heater monitors the water
temperature through the thermistor in the
heater assembly. Selecting the energy
saver, will turn off the heater and will not
affect tumble patterns.
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(3) to the
individual outputs.
Main Wash Target Temperatures
WATER VALVE OUTPUTS
The machine control determines whether
the hot or cold Water Valve Outputs
should be energized during the wash
cycle based upon the user selections.
When water fill is required, the machine
control board will activate relays on the
board, supplying power to the water
valves.
The heater will not be turned on if the
following conditions exist:
1. Low level of the water pressure switch
is not satisfied.
2. The door is open.
3. During the Bleach fill.
4. Energy Saver on.
Us e r
S elections
Input water
te m p e re d
Maximum
h e a te r o n
time
C old Wash no heater
C old water
Tempered
wash
N/A
C old Wash
with stain
cycle option &
heater.
65°F, W ill heat
Main
water to 65°F if wash time
necessary.
Warm Wash no heater
Warm water
Tempered
warm
N/A
Warm Wash
with stain
cycle option
and heater.
105°F, will heat
to 105°F if
necessary
Main
wash time
Hot Wash - no
heater
Hot water
N/A
Hot Wash with Hot water, then
stain cycle and heat to 130°F if
heater.
necessary
Main
wash time
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.
16010486 (16008373-05)
Revised 02/01
The machine control gates the power to
the hot and cold Water Valve Outputs.
When the pressure switch senses that the
full level is reached, the circuit opens and
the machine control de-energizes the
Water Valve Outputs.
The machine control will monitor the
thermistor resistance and fill time to
achieve proper wash temperatures.
During a warm wash the cold may be
cycled off periodically to achieve the
desired water temperature.
On a cold wash the hot valve may be
cycled on and off.
CYCLE SEQUENCE DEFINITIONS
IDLE/PAUSE MODE (LED Model)
After pressing the Off key, the entire
washing machine will shut down after
unlocking the door and will be in the Idle
Mode. In the idle mode all the outputs are
de-energized, all the LEDs and display are
off.
Section 2. Washer Controls Overview
©2001 Maytag Appliances Sales Company
2-6
If the Start/Pause key is pressed during
the wash cycle the washer shall stop all
the functions of the washer, placing the
washer in the Idle Mode. The Start/Pause
LED will flash indicating the pause mode.
The current place in the cycle will be
saved.
If the Start/Pause key is pressed the door
will not be unlocked until the spin speed
is 0 rpm.
If the Start/Pause key is pressed while
flashing (in pause mode), the machine
shall return to the start of the cycle step
when paused and the time displayed be
recalculated to the start of the cycle step.
The Start/Pause LED will stay on
whenever the machine is running in a
cycle. Note: The door must be closed
prior to resuming the cycle.
BLEACH DISPENSE
The Bleach Fill occurs 2 minutes prior to
the end of the wash portion of the cycle. A
bleach fill consists of turning the bleach
water valve and the appropriate fill water
valve(s) on until the water reaches high
water level or for 24 seconds, whichever
comes first. This is to ensure the bleach is
used completely during this wash. The
fill temperature during the Bleach fill shall
be based on the user selections. If stain
cycle is selected then bleach fill and final
rinse are based on user selections. If stain
cycle is not used, then only the final rinse
is affected.
REDISTRIBUTION
As the machine is accelerating into spin, if
it detects that the clothes load is
unbalanced and would cause excessive
vibration, it will decelerate and tumble the
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
16010486 (16008373-05)
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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
senses a high enough variation in speed
(suggesting an out-of-balance condition in
the clothing load), it will drop the spinner
speed to 0 rpm and force a short reverse
tumble to redistribute the clothing load
before resuming the spin. If any of the
out-of-balance switches trip and open the
out-of-balance input circuit at a speed
below 500 rpm, the machine control will
also drop the speed to 0 rpm and force
the reverse tumble to redistribute the
clothing load before resuming the spin.
SUDS DETECTION
The suds detection feature tries to
eliminate excessive suds during the main
wash or rinse cycles. Suds detection is
disabled during a stain cycle tumble
pattern.
If suds are detected, the estimated time
left on the wash cycle will be modified to
account for 4 additional rinses.
The washer will try twice in early spins
and 21 times when in the final spin.
LCD Washer: If four out of seven cycles
have suds detected, “Too many Suds
detected” should be displayed on the
screen.
LED Washer: If suds are still detected, the
“rinse” LED shall blink, 3 seconds on, 3 seconds off and "sd" will be displayed.
TUMBLE FLUSH (Two types of flush)
Wash tumble is a higher tumble speed
than normal while the machine is filled
with water. The purpose of this function is
to clean the machine. Rinse tumble flush
is performed during the final rinse to
reduce the chance of suds creation.
Section 2. Washer Controls Overview
©2001 Maytag Appliances Sales Company
2-7
MISCELLANEOUS
DOOR LOCK PHILOSOPHY
The door lock mechanism is checked
by the machine control board for
proper operation. This is done in the
following manner.
1. The door will be locked. If the door
does not lock on the first try, a help
code 47 is logged into the control
memory. The display will show the
door has not locked.
2. If the door lock switch check shows
that the door is locked, then the door
will be unlocked and the cycle will
continue unless the door fails to
unlock. If the door fails to unlock, the
cycle will be paused until the door is
able to unlock for 30 seconds and lock
again.
DOOR LOCK OPERATION
1. By closing the door, the door lock
hoop rotates the catch cam and the
door actuator is depressed actuating
the door open/closed microswitch.
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. The slider will actuate the door lock/
unlock microswitch in the locked
position and the washer will begin the
wash cycle.
6. When the wash cycle is finished an
impulse from the machine control
board to the unlocking solenoid
unlocks the door by pulling the slider
away from the door latching
mechanism and the lock/unlock
microswitch.
7. The consumer can now open the door.
8. By opening the door, the open/closed
microswitch is open.
Rotating
Cam
Emergency
Cord
Door
Cam
Lock/Unlock
Mechanical
Support
Solenoid
Opener
Solenoid
Push-Rod
Locking
Lever
16010486 (16008373-05)
Revised 02/01
Door Lock/
Unlock
Switch
Door Lock
Spring
Door Open/
Closed
Switch
Door Actuator
Lamp Socket
& Lamp
Section 2. Washer Controls Overview
©2001 Maytag Appliances Sales Company
2-8
POWER LOSS/FAILURE
Power-up after a power-loss during a main
wash cycle. The machine cycle will resume at the appropriate cycle step after
the Start/Pause key has been pressed. The
control recovers the saved information on
power-up after a power loss. The recovery will be to the appropriate step in the
cycle and within 3 minutes of the cycle
step where the power loss occurred. The
LCD display will be reset to the appropriate time left after the Start/Pause key has
been pressed and not indicate a power
failure at that point. The main wash cycle
will resume immediately after the Start/
Pause key has been pressed.
MAH5500B:
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.
MAH7500A:
Continuously monitors and saves information to memory every minute or as
cycle selection change.
Power-up after a power-loss during service
mode, continuous mode, or advertising
mode will cancel these modes.
SPECIAL FEATURES
These modes will not resume after the
power-up until the user selections are
pressed again.
If a power outage occurs during a cycle the
washer will come back up in the paused
state. When paused (either by a power
outage or by the user), the washer will
remember where it was. The machine will
not automatically time-out and cancel a
cycle while paused. The display will remain on for 10 minutes after it is paused
with no activity. After 10 minutes of no
activity, the display will turn off, but the
machine will remember where it was and
the display will be turned back on with any
user activity.
16010486 (16008373-05)
Revised 02/01
Information S aved:
Ca u s e :
The beginning of the Last
cycle step performed.
Power-loss
C urrent User Interface
selections
Power-loss
Diagnostic codes, the total W hen occurred
number of the diagnostics
since diagnostic number
has been cleared.
The number of cycles run
End of a
completed
wash cycle.
The LCD and LED washers come with
several new features not available with the
earlier versions of the Neptune washers.
By pressing a combination of keys, the
washer can be placed into an Advertising
Mode or into a Service Mode for the
service technician.
ADVERTISING MODE
This mode will continuously display the
LEDs on the keyboard or illuminate the
LCD touch screen.
Section 2. Washer Controls Overview
©2001 Maytag Appliances Sales Company
2-9
LED Washer
Pressing the heavy soil and cotton/
sturdy keys for 3 seconds shall start the
washer in the Advertising mode. No
functions will be run except illuminating
the LEDs.
press and hold both the back key and the
favorites key for 3 seconds.
After 5 minutes of inactivity in the interactive mode, the control will time out and
return to Advertising Mode and the advertising 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 Advertising mode lights the LEDs in a
row and proceed in row order. The segments on the display are turned on in
unison.
LCD Washer
This mode will continuously display the
touch screen on the keyboard.
Pressing the favorites and back keys for 3
seconds shall start the washer in the
Advertising mode.
While in advertising mode, the display will
cycle through several screens. If the
touch screen or any key (except off) is
pressed, the advertising sequence will be
temporarily interrupted and the control
will go to the Interactive State.
When this occurs, the user is able to
navigate through the control as normal
(including setting favorites, setting preferences, etc.), but the machine will not be
allowed to run a cycle. The only methods
of exiting the advertising mode are to
remove power from the machine or to
16010486 (16008373-05)
Revised 02/01
The service mode provides service personnel 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 can start special service tests such
as a service cycle, user interface check,
quick spin, and control system diagnose
mode or advance the washer to the next
step in the wash cycle. (See Service Mode
Table) The information will be displayed
and a variety of other information about the
machine can be accessed via the Help and
Diagnostic codes.
To aid the service technician, special
software was incorporated into the control boards of the MAH5500B & MAH7500
washers. The software is used to monitor
several functions of the washer during
operation and identify any abnormalities
as they arise. These abnormalities can be
monitored in the Service Mode and the
board will list previously identified failures as either a Help or a Diagnostic code.
The Help codes are generally logged
when the severity level of the abnormality
is not sufficient enough to shut down the
washer or require service.
The Diagnostic codes are generally
logged dentified when the severity level
of the abnormality detected is higher and
service may be required.
2-10
Section 2. Washer Controls Overview
©2001 Maytag Appliances Sales Company
NOTE: Due to the various differences
in the two washer control systems, the
following pages will focus first on the
LED washer then the LCD washer.
Membrane Pad Check
While in service mode, pressing the
wrinkle free key will start a membrane
pad switch check.
The Help and Diagnostic code lists are
stored in separate permanent memories
with a maximum of nine codes per list.
LED WASHER:
Accessing Service Mode:
Pressing down the delicates and heavy soil
keys for 3 seconds places the machine in
the service mode.
SPECIAL TESTS
The following table lists the various tests
available while in the Service Mode, which
can be accessed by pressing the following
keys:
SERVICE MODE TABLE
LED Washer:
P re s s K e y s
S pecial Test/Function
Normal
Shows Motor Torque
Wrinkle Free
Membrane Pad C heck
Quick
Fast Time Down Test
Spin
Quick Spin Test
Light Soil
Displays Software Revision
Number
Delicates
Quick Service C ycle
Rinse
Board Output Test
Stain C ycle
Help C odes
Presoak
Diagnostic C odes
Hand Wash
Board Input Tests
16010486 (16008373-05)
Revised 02/01
The membrane check involves turning all
the embedded LED on the membrane
pad off except for the wrinkle free key. All
the LED’s can be toggled by pressing the
key associated with the LED.
At any point, if there are 5 seconds of
inactivity, then this test will exit without
any display.
The off key must be pressed twice within
30 seconds in order to cancel this test.
FAST TIME DOWN TEST
While in service mode, the pressing of
quick key will advance the program to
the next portion of the wash cycle. (Refer
to page 1-2)
QUICK SPIN TEST
While in service mode, the pressing of
spin key shall start the washer in the
quick spin mode.
Section 2. Washer Controls Overview
©2001 Maytag Appliances Sales Company
2-11
The following Quick Spin test steps are as
follows:
1)
2)
3)
4)
5)
6
7)
Lock the door.
Spin to 350 rpm and hold for 6 seconds.
Spin to 550 rpm and hold for 6 seconds.
Spin to 600 rpm and hold for 6 seconds.
Spin to 650 rpm and hold for 6 seconds.
Spin to 800 rpm and hold for 6 seconds.
Spin to 1000 rpm and hold for 6
seconds.
If the Spin key is pressed again during the
Quick Spin test, the current speed will be
held indefinitely. Pressing the Spin key again
will allow the quick test to proceed as listed
above.
When the washer is in the spin cycle
during the Service Mode, the speed will
be displayed as follows.
S peed R ange
a) 0-99 rpm
b) 100-999
rp m
QUICK 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.
D isplayed
5. Turn the drain on.
0-99 (actual)
6. Spin to 800 RPM using default rates.
7. End spin and Coast down.
Speed / 10
8. Unlock the door when the RPM is zero.
1st digit
A >=1000 or <1000 RPM
B >=1100 or <1200 RPM
c) 1000 + rpm C >=1200 or <1300 RPM
2nd digit - tens
Example: A2 = 1020 RPM
B6 1160 RPM
9. Display a ‘PA’ on continuously for 10
seconds if no diagnostic codes were
logged during this test.
The up arrow if pressed will advance to
the next step. The right most dot should
be turned on as an indication of failure and
stay on until quick service cycle test has
reached the end. Any diagnostic code
logged during this test should result in
failure of the test, but should not necessarily stop the test.
If any steps in the quick service cycle fail,
then a service mode is entered, and the
first diagnostic code that was logged
would be displayed.
16010486 (16008373-05)
Revised 02/01
While in quick service cycle, the pressing
of the hand wash will suspend the machine at this step until the Hand Wash key
is pressed again up to 30 minutes. All
2-12
Section 2. Washer Controls Overview
©2001 Maytag Appliances Sales Company
LED’s will flash on and off while the cycle
is paused.
BOARD INPUT TEST
While in service mode press the hand
wash key places the washer into the
Board Input Test.
K e y P re s s e d :
Function:
F e e d b a ck:
C otton/Sturdy Door Position "d0" Open
"d1" C losed
Delicates
Latch Position "L0" Unlocked
"L1" Locked
Wrinkle Free
High Water
Level
"~0" Below Level
"~1" Above Level
Hand Wash
Low Water
Level
"_0" Below Level
"_1" Above Level
Temp Down
Unbalance
C ircuit
"u0" Balanced
"u1" Unbalanced
Temp Up
Water
Temperature
Degrees * F.
Spin
V ibration
Signal
0-255 *
Rinse
Brown Out
Level
0-225 *
Quick
Acceleromet- PA = Passes
er circuit
FA = Fails
K e y P re s s e d :
Function Performed
C otton/sturdy
Hot Water Valve
Wrinkle Free
C old Water Valve
Delicates
Bleach Valve
Hand Wash
Fabric Softener Valve
Presoaks
Drain Pump
Stain C ycle
Motor C ontrol
Extra Rinse
Max Extract
Unlock Door (Sends a pulse
every 2 seconds)
Lock Door (Sends a pulse
every 2 seconds)
HELP CODES
When the washer performs differently
from design, a Help code is identified and
assigned. The severity level is generally
less than that of a diagnostic code.
Accessing The Help Codes
Place the washer into the service mode,
then press the stain cycle key. A ‘h’ will
display and turn the LED on above the
Stain Cycle key.
*Two digit display =0-99; max extract LED=100;
Max extract LED and extra rinse LED=200.
BOARD OUTPUT TEST
While in service mode, pressing the rinse
key places the washer into the Board
Output test. This test will turn on a specified output after a key press. All output
will be turned off after 10 minutes. or if
another output is selected.
16010486 (16008373-05)
Revised 02/01
The Help codes can be reviewed by using
the arrow keys. The up/down arrow will
go track up/down the list one code at a
time. The first code to display will be the
latest code generated. The oldest code
will be on the bottom of the list. If there
are no help codes available, ‘- -‘ will be
displayed. If the code happened on the
previous cycle, then the rightmost dot will
be turned on.
Section 2. Washer Controls Overview
©2001 Maytag Appliances Sales Company
2-13
Number of Cycles Since Code Assigned
Accessing Diagnostic Codes
While this help code is displayed, if the
extra rinse key is pressed and held, the
machine shall display the number of
cycles ago the Help code occurred while
the key is held. Also, while this key is
being held, the LED will be turned on by
the key. When this key is let up, then the
help code is again displayed. If there are
no help codes available, ‘- -‘ will be
displayed while this key is pressed. If the
code is over 99 cycles ago, then ‘- -‘ will
be displayed.
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.
Clearing the Help Codes
The list of Help Codes can be cleared from
the memory of the board, by pressing
heavy soil and stain keys for 3 seconds
while viewing the list.
For a listing of available Help codes, see
Section 5: DIAGNOSTIC/HELP CODE
TABLES.
DIAGNOSTIC CODES:
When a problem with the wash system is
detected a diagnostic code is assigned
and logged into the control board
memory with the last cycle count at which
it occurred. Diagnostic codes are
generally more severe than a Help code.
In some cases, when the washer shuts
down, something shall be displayed on
the display until the consumer presses a
key or opens the door. See the table for
specific actions or references to where
the proper action is defined.
The first time the down arrow key is
pushed, the newest code is displayed
The up arrow will go up the list one code
each time it is pushed with no wrap. The
topmost will be a ‘d’. The bottommost
will be the oldest code. If there is no
diagnostic codes available, ‘- -‘ will be
displayed for the diagnostic code. If the
code happened on the previous cycle,
then the rightmost dot should be turned
on.
Number of Cycles Since Code Assigned
While this diagnostic code is displayed, if
the cotton/sturdy key is pressed and
held, the machine shall display the
number of cycles ago the diagnostic code
occurred while the key is held. Also,
while this key is being held, the LED
should be turned on by the key. When
this key is let up, then the diagnostic code
is again displayed. If there is no
diagnostic codes available, ‘- -‘ will be
displayed while this key is pressed. If the
code is over 99 cycles ago, then ‘- -‘ will
be displayed.
Clearing Diagnostic Code List
The diagnostic code list can be cleared
from memory, by pressing heavy soil and
presoak keys for 3 seconds while viewing
the list.
16010486 (16008373-05)
Revised 02/01
Section 2. Washer Controls Overview
©2001 Maytag Appliances Sales Company
2-14
ACCESSING SERVICE MODE
Service Tests
LCD WASHER:
Press and hold the back and help keys for
5 seconds to enter the Service Mode.
Pressing the Service Mode keys again,
will take the machine out of the Service
Mode.
The following screen will appear on the
touch screen.
####RPM
####torque
unbalance
system check
diagnostic codes
1...
2...
3...
4...
service cycle
quick spin test
advance to
next step
system check
exit service
tests
The service tests are identical to the LED
washer, except instead of pressing LED
keys, the technician can touch any of the
screens on the washer control panel to
initiate.
upper
left
If the washer is in operation when the
service mode is activated, the current
spinner RPM, torque and unbalance will
be listed.
The diagnostic codes listed are the last
four codes assigned by the washer.
User Interface
Test
upper
right
Touch the four corners and center of the touch
screen in any order.
center
exit service mode
The Service Mode screen lists four
different touch panels; service tests, RPM/
torque, unbalance diagnostic codes and
exit service mode. Pressing any of the
touch screens will activate a different
screen dedicated to that function, except
RPM/torque.
16010486 (16008373-05)
Revised 02/01
user interface test
User Interface Tests
Service Mode
service test
Service Tests
lower
left
exit user
interface test
lower
right
This will check the touch screen. The
service technician is prompted to “Touch
the four corners and center of the touch
screen in any order." When each area is
pressed, the button display will reverse
image. If all areas are sensed, the control
will display “Touch screen test passed." If
any area(s) is not sensed within 10
seconds, the technician will be prompted
to “Touch the area(s) not highlighted." If
the area can still not be sensed within 10
seconds, the control will display “Touch
Section 2. Washer Controls Overview
©2001 Maytag Appliances Sales Company
2-15
screen test failed." In either case the
screen will step to the next screen to
check the membrane switches.
Service Cycle
start service
cycle
User Interface
Test
Touch screen test passed.
Press the switches in any order.
home
favorites
back
help
start/pause
off
exit user
interface test
This test checks the membrane switches
on the console pad.
The screen displays the status of the
touch screen test that was just performed.
The technician is then prompted to
“Press the 5 keypads in any order." When
each key is pressed, it will display in
reverse image and remain that way. If all
keys are sensed, the control will display
“Membrane switch test passed." If any
key(s) is not sensed within 10 seconds,
the technician will be prompted to “Touch
the key(s) that are not highlighted." If
key(s) again are not sensed within 10
seconds, the control will display which
key(s) failed.
Press "start
service cycle"
or start/pause
button to
begin service
cycle
system check
cancel & exit
service cycle
To start a wash cycle in the Service Cycle:
If the washer is not operating in a wash
cycle, touch the icon start service cycle
or start/pause key to begin the service
cycle.
During a cycle:
While the washer is running, and service
cycle is selected, the following screen will
display and you can perform system
checks of the various inputs and outputs
of the washer by selecting system check.
(See System Check)
Service Cycle
cancel cycle
system check
The last step of the user interface test is to
display the entire screen in reverse image
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.
cancel & exit
service cycle
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.
16010486 (16008373-05)
Revised 02/01
Section 2. Washer Controls Overview
©2001 Maytag Appliances Sales Company
2-16
The service cycle will advance the washer
through various parts of the wash cycle
and will display the following on the
control panel.
• “Cold water fill”
• During the second step of the test, the
technician will be prompted to “Open
and close the door and then restart by
pressing start/pause”.
• “Locking the door”, “Cold water and
bleach fill” and “Warm water and bleach
fill”
• “Tumble”
• “Hot water fill”
• “Hot water and fabric softener fill” and
“Warm water and fabric softener fill”
• “Static drain”
• “Spin”
• “Coast down and unlock at 0 RPM”
• “Service cycle complete”
Advance to next step: When this icon is
selected during the cycle, it will advance
to the next step in the service cycle.
Note: This selection is valid only if a
cycle is running.
Quick Spin
Test
Press "start quick spin test" or start/pause
button to begin quick spin test
skip tuning
algorithm
start quick
spin test
enable plaster
unbalance
detection
cancel & exit
quick spin test
Select start quick spin test or start/
pause key to begin quick spin test.
The default is that the tuning algorithm will
apply, but it can be skipped. Plaster
detection will default to disabled, but can
be enabled.
16010486 (16008373-05)
Revised 02/01
The following will be displayed during
the quick spin test:
“Locking the door”
“Spin to 350 RPM”
“Spin to 550 RPM”
“Spin to 600 RPM”
“Spin to 650 RPM”
“Spin to 800 RPM”
“Spin to 1000 RPM”
“Coast down and unlock at 0 RPM”
Quick spin test complete”
Any of the steps in this test can be held or
paused up to 30 minutes, by touching the
start/pause key..
Skip tuning algorithm: When selected,
the tuning algorithm will be skipped. This
must be selected before tuning.
Enable plaster unbalance detection:
When selected, plaster unbalance
detection will be enabled. This must be
selected before spin starts.
Cancel & exit quick spin test: this
returns you to the service tests screen.
If the washer is already running and the
quick spin test is selected on the service
test screen, the above screen will be
displayed.
Quick Spin Test
cancel cycle
cancel & exit
quick spin test
Section 2. Washer Controls Overview
©2001 Maytag Appliances Sales Company
2-17
SYSTEM CHECK
DIAGNOSTIC/HELP CODES
System checks can be run when the
washer is running a wash cycle or not. If
the washer is not in a wash cycle, the
following screen will display and allow the
technician to toggle 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.
To toggle outputs,
press PAUSE and select output below
Output Status
hot water on
cold water on
bleach valve on
fabic softener on
drain on
motor control
on heat on
Input Status
door closed
door locked
unbalance detected
wash level (low) speed
rinse level (high) sensed
fill temperature
sump temperature
ambient temperature
RPM
cancel cycle
exit system check
software version Diagnostic/Help
XXXX
Codes
diagnostic codes:
1...
2...
3...
4...
5...
6...
7...
8....
9...
clear
diagnostic codes
cycle count
XXXX
help codes:
1...
2...
3...
4...
5...
6...
7...
8....
9...
exit diagnostic/
help codes
clear
help codes
Diagnostic codes: Display all diagnostic
codes.
Help codes: Display all help codes.
Software version: Display current
software version.
Cycle count: Display the cycle count
exit diagnostic/help codes: Return to
previous screen.
Clear diagnostic codes: Clear the entire
list of diagnostic codes.
Cancel & exit quick spin test: this
returns you to the service tests screen.
Clear help codes: Clear the entire list of
help codes.
Cancel cycle: This will stop the current
cycle.
Software version: Display current
software version
Exit system check: This will exit the
system check screen and revert back to
the previous screen shown on the display
panel..
For a listing of available diagnostic and
help codes, see Section 5: DIAGNOSTIC/
HELP CODE TABLES.
16010486 (16008373-05)
Revised 02/01
Section 2. Washer Controls Overview
©2001 Maytag Appliances Sales Company
2-18
Section 3: DIAGNOSTIC/HELP CODE TABLES.
HELP CODES LISTING:
Help
D escription
Co d e
01
Plaster Unbalance
Load Detected.
02
Reset Seen
Trigger
Unbalance load
condition existed
during initial ramp up
or spin cycle.
Resulted in
redistribution cycle.
Electrical noise
detected by machine
control board.
Action to be Taken
Informative only; non-critical condition
Identify where specifically in the cycle
this occurred, to aid in identifying which
components may have been initially
actuated. C heck for loose connections
of these components and correct if
necessary. If random, suspect incoming
power supply to washer.
03-06 (Not Used)
07
Slow Drain
08
One locked rotor
09
Fill hoses are
re v e rs e d
10
11
Locked rotor
condition during a
spin
(Not used)
12
(Not used)
13
Low Speed
Unbalance
Detected.
14
(Not used)
15
(Not Used)
16010486 (16008373-05)
Revised 2/01
Low water level
contacts of pressure
switch not seen as
resetting at end of
drain cycle.
During startup, the
Spinner did not reach
10 rpm within 2 sec.
(During Wash/Tumble)
Water valve
thermistor readings
are contrary to what
is being demanded
by washer control
board.
Locked rotor
condition during a
spin.
Opening of unbalance
switches at speed
<500 rpm
C heck for restricted drain system,
kinked/plugged drain hose or pump.
C heck pump for proper function. May
see diagnostic code 01.
Informative only; non-critical condition.
Informative only; (LED washer only)
Informative only; non-critical condition.
Informative only; not-critical condition.
Section 3. Teardown & Wiring Information
©2001 Maytag Appliances Sales Company
3-1
Help
D escription
Co d e
16
Spin suds lock
17
(Not used)
18
(Not used)
19
Power down
20
(Not Used)
21
Fast fill
22
(Not used)
23
Too much power
at 450-850 rpm
Trigger
Action to be Taken
Suds lock, full on for
1 second within a
spin at less than 500
rpm during a spin
cycle
Too much detergent; non-HE detergent
with suds suppressor being used;
washing clothes with minimal amount of
soils present with normal measure
amount of detergent
L o ss o f p o we r
LED washer will also display"PF"
Fill level reached
within 2 seconds of
fill initation
Possible slow drain scenario present or
customer interrupted wash cycle and
started washer over again. C heck for
Diagnostic C ode 08
Motor on at full
Informative Only
power for 30 seconds
between 450-850 rpm
24-29 (Not used)
30-32 (Not used)
33
34
35
36
37
Excessive Subs
Detected During
wash/tumble
C ontrol board detects Too much detergent; non-HE detergent
motor torque
with suds suppressor being used;
fluctuations dropping washing clothes with minimal amount of
in torque readings
soils present with normal measure
amount of detergent
Too much power
Maximum torque
Perform Diagnostic Motor/Motor
at start of spin
requested in spin less C ontrol Board test. C heck wire harness
connections at motor, motor control
than 450 rpm
board (JP4 connector) and machine
control board connection
Too much power
Maximum torque
Perform Diagnostic Motor/Motor
during
requested in
C ontrol Board test. C heck wire harness
wash/tumble
wash/tumble
connections at motor, motor control
board (JP4 connector) and machine
control board connections
Motor still running Motor still running
Informative only
after 120 seconds after 120 seconds of
of coast down
coast down after a
after a spin
spin
Motor running too 1 minute after start of Informative only
fast during tumble tumble, if speed is >
8 5 rp m .
for too long
16010486 (16008373-05)
Revised 2/01
Section 3. Teardown & Wiring Information
©2001 Maytag Appliances Sales Company
3-2
Help
D escription
Co d e
38-39 (Not Used)
40
Motor running and
the Door is not
locked
41
No tach signal
during door
unlock sequence
42
Motor control not
powered during
unlock
43
Tach signal
unexpectedly
present during
unlock
44
Unlocking
attempts
disallowed
because tach
signal continues
after tach
verification
Door locked when
not expected
C abinet impact
sensed
45
46
47
Door did not lock
after the first try
16010486 (16008373-05)
Revised 2/01
Trigger
Action to be Taken
Motor running and
Perform Diagnostic Motor/Motor
the door is not locked C ontrol Board test. C heck wire harness
connections at motor, motor control
board (JP4 connector)
Informative only; Refer to Diagnostic
C ycle was paused
due to failure to verify code 62 (LC D Only)
tack signal during
unlock request
C ycle was paused
Informative only; Refer to Diagnostic
because motor
code 62 (LC D Only)
control not powered
during unlock request
C ycle was paused
Informative only; Refer to Diagnostic
code 62 (LC D Only)
because the tach
occurred when the
motor control was
powered during
unlock request
No tach signal
Informative only; Refer to Diagnostic
observed when
code 62 (LC D Only)
motor control is
powered at the end
of the failed fast
powerup and unlocks
retries
C heck door lock switch for welded
contacts
C abinet impact
Informative only
detected by the frame
vibration sensor
The door lock switch C heck for loose wire connections and
did not go from
for bad door lock sense switch
unlocked to locked
when the door lock
output was energized
Section 3. Teardown & Wiring Information
©2001 Maytag Appliances Sales Company
3-3
DIAGNOSTIC CODES LISTING:
D iag.
Co d e
01
D escription
Trigger
No drain
The water level fails
to drop below the
low water level in
final spin
02
The door fails to
unlock
Door failed to unlock
after 11 attempts
03
No fill
C ontinuous fill of 12
minutes.
04
The door fails to
lock
Door failed to lock
after 11 attempts
05
C ontinuous
unbalanced circuit
See section for
unbalanced loads.
(During spin only)
06
Locked rotor
Locked rotor is still
locked after 10
consecutive retry
attempts
07
Heater is not
heating
Heater has been on
for 10 min and water
temperature has not
increased
16010486 (16008373-05)
Revised 2/01
Action to be Taken
LED - W ill display "nd"
LC D - Display washer will not drain
C heck for:
•Restricted drain system
•Kinked/plugged drain hose or pump
•Faulty pump
•Loose wire connections
•Bad control board
LED - W ill display "LO"
LC D - Display washer will not unlock
C heck for:
•Faulty door lock solenoid
•Loose wire connections
•Faulty door lock switch
•Faulty door lock sense switch
•Bad control board
LED - W ill display "nF"
LC D - Display washer will not fill
C heck for:
•C logged inlet screens
•Water Available
•Loose wire connections
•Pressure switch contacts
•Bad control board
LED - W ill display "FL"
LC D - Display washer will not lock
C heck for:
•Faulty door lock solenoid
•Loose wire connections
•Faulty door lock switch
•Faulty door lock sense switch
•Bad control board
C heck for:
•Faulty unbalance switches
•Loose wire connections
•Bad control board
LED - W ill display "Lr"
LC D - Display motor is not working
C heck for:
•Perform Diagnostic motor/motor
control test
•Loose wire connections
•BInded spinner shaft bearings
C heck for: (LC D only)
•Loosed wire connections to heater and
thermistor
•Faulty thermistor
•Faulty heater
•Perform System C heck (page 14)
Section 3. Teardown & Wiring Information
©2001 Maytag Appliances Sales Company
3-4
D iag.
Co d e
08
D escription
Trigger
Action to be Taken
Water sensor level The low water level
fault
are not satisfied
before the high water
level contacts are
made in the pressure
switch
(Not Used)
C heck for:
•Perform special tests (LED) or system
checks (LC D)
•Loose wire connections
•Faulty pressure switch
10
L o w rp m
unbalanced load
Never reached 400
rpm due to an
unbalanced load
11
Non-volatile
m e m o ry e rro r
Difficulty in reading
m e m o ry
C heck for:
•Loose wire connections
•Faulty unbalance switches
•Unlevel washer; leveling legs not
locked
•Weak floor
1. C lear diagnostic codes
2. Unplug and replug in power cord
washer at power supply outlet
3. If a condition still exists, replace
machine control board.
09
12-14 (Not Used)
15
Stuck key
16
High speed not
achieved due to
high motor torque
17
Door switch was
not seen open
since the last final
spin
18
Door lock switch
seen open during
cycle
16010486 (16008373-05)
Revised 2/01
A key is sensed to be
pressed more than 75
seconds, the key shall
be assumed to be
stuck
Speed never went
over 400 rpm during
a main wash cycle
because the max
torque was seen for
too long
The door has not
been opened after a
complete wash cycle.
Door switch was not
seen open since the
last final spin
Door lock switch is
read as open with
motor running
1. Perform membrane pad check
2. Replace console w/membrane pad
assembly if necesary
C heck for:
• Excessive suds
• Faulty pump
• Tight bearings on spinner shaft
• Tight bearings on motor shaft
• Bad motor or machine control board
LED - W ill display "od"
LC D - Indicate door was not seen open
between wash loads
C heck for:
• Faulty door switch (welded contacts)
•C ustomer may have tried to repeat
wash cycle without opening door
• C heck for loose wire connections
• C lear the diagnostic code and
recheck; if re-occures, perform
diagnostic motor/motor control board
test
•C heck for faulty motor relay on the
machine control board
Section 3. Teardown & Wiring Information
©2001 Maytag Appliances Sales Company
3-5
D iag.D escription
Trigger
Co d e
19
Door lock sense or Door lock sense
switch on machine
motor control
control board is read
relay failed
as open with motor
running
Action to be Taken
(LED Washer only)
See list for diagtnostic code 18
20
Door switch input
seen open during
cycle
Door switch is open
21
Door sense switch
failed on machine
control board
22
Door switch seen
open during cycle
23
Door failed to
unlock
24
Motor over speed
25
Motor tach signal
exists without
motor running
See diagnostic code 20 or 22
Door sense switch is
read as open and the
door locked switch is
read as locked
Door switch is read as • C lear the diagnostic code and
recheck; if reoccurs, perform
open and the door
diagnostic motor/motor control
locked switch is read
board test
as locked
• C heck for faulty motor relay on the
machine control board
• Loose wire connections
• Faulty door switch
• Faulty door lock sense switch
Door lock is locked
• Faulty door lock solenoid
and a user tries to
start a cycle
1. Replace motor control board
Motor tach signal is
seen at maximum
sp e e d
1. Replace motor control board
Tach signal exists
without torque
commanded.
(Abnormal condition
only)
26
(Not Used)
28
Valve thermistor
failure
29
Sump thermistor
failure
61
Door lock switch
sensed locked
during cycle when
not expected
C onditions for
unlock not met
during cycle
62
16010486 (16008373-05)
Revised 2/01
Abnormal high/low
temperature or ohm
resistance seen
Abnormal high/low
temperature or ohm
resistance seen
Door became locked
during 30 second
unlocked period at
beginning of cycle
(See Help C odes 41,
42, 43)
(LED Washer only)
• Loose wire connections
• Faulty door switch
• C ustomer tried to forcibly open
door while locked
• Loose or pinched wires
• Bad water valve
• Loose or pinched wires
• Bad water valve
(LC D Only)
• Faulty door lock sense switch
• Faulty door lock solenoid
(LC D Only)
• Faulty door lock solenoid
• Loose wire connections
• Faulty door lock switch
• Faulty door lock sense switch
• C heck for bad motor control board
(LC D Only)
Section 3. Teardown & Wiring Information
©2001 Maytag Appliances Sales Company
3-6
GENERAL COMPONENT - EXPLODED VIEW
Component Identification & Location:
16010486 (16008373-05)
Revised 2/01
Section 3. Teardown & Wiring Information
©2001 Maytag Appliances Sales Company
3-7
Glossary of Terms
Add Fill – This is the additional filling of the
water after the first initial fill to bring the
water level back up to the appropriate level
after the clothes have absorbed the water.
Bleach water valve – This is the coil and
valve assembly that allows water to enter
the bleach dispenser when this coil is
energized. In order for water to flow, this
coil needs to be energized in conjunction
with a fill water valve.
Cold water valve – This is the coil and
valve assembly that allows cold water to
enter the machine when this coil is
energized.
Diagnostic code – A problem with a
system that is severe enough that the cycle
was stopped and it is recommended the
machine be serviced.
Distribution – A special acceleration profile
used between the spinner speeds of 50
rpm and 85 rpm which is designed to
evenly distribute the clothes load.
Help code – A system responded
differently than expected, but in most
cases did not cause the cycle to stop.
Hot water valve – This is the coil and valve
assembly that allows hot water to enter the
machine when this coil is energized.
Intermediate Rinse – This is a rinse that
falls between the first rinse and the final
rinse.
Fill water valve – This is a Cold water valve
or a Hot water valve.
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 touchscreen press.
Non-tempered cold – This will only have
the cold water valve energized.
Non-tempered warm – This will have both
the cold water valve and the hot water
valve energized.
Non-tempered hot – This will only have
the hot water valve energized.
Plaster – This is the point at which the
centrifugal force of the spinning action is
greater than the force of gravity so that the
clothes no longer tumble, but are kept
plastered against the spinner.
User activity – Any key press or door
opening or closing.
Redistribution – As the machine is
accelerating into spin, if it detects that the
clothes load is unbalanced and would
cause excessive vibration, it will decelerate
and tumble the clothes in an attempt to
redistribute them in a more uniform
manner so that vibration is reduced.
Softener water valve – This is the coil and
valve assembly that allows water to enter
the fabric softener dispenser when this coil
is energized. In order for water to flow, this
coil needs to be energized in conjunction
with a fill water valve.
Final Rinse – This is the last rinse of the
cycle just preceding the final spin portion
of the cycle.
16010486 (16008373-05)
Revised 2/01
Section 3. Teardown & Wiring Information
©2001 Maytag Appliances Sales Company
3-8
Spin – This is the process of rotating the
clothes at a high speed so that the
centrifugal force extracts the water from
the clothes so that it can be drained from
the machine.
Spin Speed – This is the speed of the
washer spinner during extraction.
Spinner – This is the wash basket that
holds the clothes and is turned by the
motor.
Static Drain – This is a drain with no
tumble action.
Tempered – This refers to fills which cycle
the cold or hot water valve to achieve a
desired final temperature.
Tumble Flush – This is a tumble at a higher
tumble speed than normal while the
machine is filled with water. The purpose
of this function is to clean the machine, mix
detergent and during the final rinse to
reduce chance of suds creation.
Tumble Speed – This is the speed of the
washer spinner.
Tumble drain – When the drain pump is on
while the machine is tumbling at the
specified tumble pattern for the cycle.
Wrinkle Free – This is both a type of fabric
selection (such as with cotton/sturdy,
Delicates, and Hand Wash) and a spin
speed setting.
Tumble – This is the 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).
16010486 (16008373-05)
Revised 2/01
Section 3. Teardown & Wiring Information
©2001 Maytag Appliances Sales Company
3-9
16010486 (16008373-05)
Revised 2/01
Section 3. Teardown & Wiring Information
©2001 Maytag Appliances Sales Company
3-10
SECTION 4. ELECTRICAL COMPONENTS & TESTING
Door Lock Test
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
Cold
Bleach
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.
Hot
Thermistor
4 Coil Water Valve
Figure 4-1
The thermistor is on NTC and will drop in
resistance when the temperature
increases.
16010486 (16008373-05)
Revised 02/01
Section 4. Electrical Components & Testing
©2001 Maytag Appliances Sales Company
4-1
DOOR LOCK MECHANISM
Emergency
Cord
Door
Lock/Unlock
Solenoid
Rotating
Cam
Door Open/
Cam
Door Lock Closed Switch
Mechanical
Support Spring
Opener
Solenoid
Push-Rod
Locking
Lever
Door Lock/
Unlock
Switch
Door Actuator
Lamp Socket
& Lamp
Figure 4-2
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. The control
also communicates with the motor control board to facilitate the various cycles
and drive the motor for optimum performance. This is done by monitoring
torque and speed of the motor through the motor control board.
Figure 4-3
Both incoming and exiting voltage is monitored through the machine control board and
the surrounding circuitry. The following table lists the voltages for the various terminals
on the microprocessor board. If proper voltage is not present, check switches and
wiring for possible loose connections or open circuits by disconnecting the power
supply and performing continuity checks of individual circuits. NOTE: Connector P8(2)
(White wire) is Neutral input and L1 input is the connector P6(2) (Black wire), L1 output is
connector P6(3) (Black wire).
The 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.)
16010486 (16008373-05)
Revised 02/01
Section 4. Electrical Components & Testing
©2001 Maytag Appliances Sales Company
4-2
INPUT/OUTPUT VOLTAGES (LCD Washer)
D escription
Bleach water valve output
Co n n e c t o r /
Pin Number
P1(5)
Co n n e c t o r /
Pin Number
P8(2)
Voltage
120 VAC
Co m m e n ts
C hassis Ground
P3(1)
C old water valve output
P1(4)
P8(2)
120 VAC
Ground
500-1K ohms
60 millisecond pulse
Door Lock output
P1(1)
P8(2)
120 VAC
Door lock switch input
P2(3)
P3(8)
24 V DC
Door switch input
P8(1)
P8(2)
120 VAC
Door unlock output
P8(3)
P8(2)
120 VAC
Drain pump output
P6(4)
P8(2)
120 VAC
Heater - Neutral
P6(1)
P8(1)
120 VAC
High water level - input
P1(8)
P8(2)
120 VAC
Hot water valve output
P1(3)
P8(2)
120 VAC
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 V DC
Motor control tach
P2(1)
P2(3)
24 V DC
Neutral (120 VAC )
P8(2)
Unbalance input
P2(3)
P3(4)
24 V DC
Softener water valve
P1(6)
P8(2)
120 VAC
Sump thermistor
P5(3)
P5(4)
V DC
Torque PW M
P2(2)
P2(3)
24 V DC
Water valve thermistor
P3(6)
P3(7)
5 V DC
60 millisecond pulse
MAH7500 Only (~14 ohms)
500 - 1K ohms
Neutral
NTC device (see thermistor
temperature chart - page 4-8 LC D
model only (3K-18K ohms)
10K-85K ohms)
INPUT/OUTPUT VOLTAGES (LED Washer)
D escription
Bleach water valve output
C hassis Ground
Co n n e c t o r /
Pin Number
P1(5)
Co n n e c t o r /
Pin Number
P8(2)
P3(1)
Voltage
Co m m e n ts
120 VAC
Ground
C old 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 V DC
Door switch input
P8(1)
P8(2)
120 VAC
Door unlock output
P8(2)
P8(2)
120 VAC
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
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 V DC
Motor control tach
P2(1)
P2(3)
24 V DC
Neutral (120 VAC )
P6(3)
Unbalance input
P2(3)
P3(4)
24 V DC
Softener water valve
P1(6)
P8(2)
120 VAC
Torque PW M
P2(2)
P2(3)
24 V DC
Water valve thermistor
P3(6)
P3(7)
5 V DC
16010486 (16008373-05)
Revised 02/01
60 millisecond pulse
500 - 1K ohms
Neutral
(10K-85K ohms)
Section 4. Electrical Components & Testing
©2001 Maytag Appliances Sales Company
4-3
Membrane 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 Check)
On both washers, you can check the membrane pads, by pulling the P7 connector from
the machine control board and locating the corresponding switch pin numbers in the
ribbon harness.
LCD Washer
Membrane Pad
Pin Number
Pin Number
Home
P7(3)
P7(5)
Favorites
P7(4)
P7(5)
Back
P7(3)
P7(6)
Start/Pause
P7(3)
P7(7)
Off
P7(4)
P7(7)
Help
P7(4)
P7(6)
Pin Number
Pin Number
C otton/Sturdy
P7(4)
P7(10)
Wrinkle free
P7(5)
P7(10)
Delicates
P7(6)
P7(10)
Hand wash
P7(6)
P7(11)
Wash/rinse +
P7(4)
P7(12)
Wash/rinse -
P7(5)
P7(11)
Spin
P7(5)
P7(12)
Rinse
P7(6)
P7(12)
Quick
P7(4)
P7(11)
Light soil
P7(4)
P7(13)
Normal soil
P7(6)
P7(13)
Delay wash
P7(5)
P7(13)
Heavy soil
P7(6)
P7(14)
Presoak
P7(5)
P7(6)
Stain C ycle
P7(6)
P7(14)
Extra Rinse
P7(5)
P7(15)
Max extract
P7(6)
P7(15)
Start/pause
P7(4)
P7(16)
Off
P7(5)
P7(16)
Signal -
P7(6)
P7(15)
Signal +
P7(6)
P7(16)
LED Washer
Membrane Pad
16010486 (16008373-05)
Revised 02/01
Section 4. Electrical Components & Testing
©2001 Maytag Appliances Sales Company
4-4
DRIVE MOTOR
MOTOR CONTROL BOARD
The drive motor is still a switched reluctance type motor. (For more information,
please refer to manual 16008373, Section 4; Drive Motor.)
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 and
then timing the echo signal. By doing this,
the motor control is able to deterimine
the motor speed and direction. This
information is then calculated to determine the motor speed.
The new motor is a sensorless motor
drive system. The word "sensorless"
indicates that motor direction and speed
detection are performed electrically
without the aid of the sending device.
Meaning, the sensor was eliminated from
the end of the motor along with the wire
harness leading to the RPT connection on
the motor control board.
Motor Control Access
Slight modifications were made to the
motor control bracket and the plastic drip
shield.
Drip Shield Removal
1. Push the plastic shield on either side of
the locking tab to buckle and unlock
the shield from the motor control
bracket. (Figure 4-4)
The motor control has a software switch
in it that will turn off all power devices for
as long as the main voltage is above 133
VAC. Once the mains voltage drops
below that voltage, the power devices will
be re-enabled and the motor control will
resume normal operation.
2. The motor control board bracket is
secured with two screws in front and
secured to the baseframe via a tab on
the bracket inserted into a slot in the
baseframe.
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)
16010486 (16008373-05)
Revised 02/01
Figure 4-5
Section 4. Electrical Components & Testing
©2001 Maytag Appliances Sales Company
4-5
Motor Drive System Test
To check the system, check the board for
proper output to the motor control. This
is done by performing a board output
check. Then perform the Motor And
Motor Control Test.
Machine Control Board Output Test
1. Place the washer into Service Mode.
(See Section 2; Accessing Service
Mode)
2. LED Washer: Access Board Output
Test and press Stain Cycle. This will
send a signal to the motor control to
operate the motor. This will test the
board relay for 120 VAC output to the
motor control board. Motor will not
operate, because the door is not
locked.
LCD Washer: Access Service Tests
and press system check. Touch the
screen to toggle the motor control on.
This will test the board relay for 120
VAC output to the motor control
board.
Motor Phases
With the introduction of the sensorless
motor, the Motor Phase Test is no longer
required. 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 activate Service Mode.
16010486 (16008373-05)
Revised 02/01
Figure 4-6
5. LED Washer: Select Board Output
Test; close door or push door
acturator button; touch the stain cycle
membrane switch.
LCD Washer: Select System Check;
close door or push door actuator
button: touch Toggle Motor Control
On
6. The motor control will immediately
execute a test routine and the motor
should run, rotating the spinner at 50
rpm.
7. 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 connector to the
motor control.
If the motor runs, and the spinner
does not rotate: Check for missing
belt.
8. 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, replace
motor control/wire harness assembly
completely. (Figure 4-7)
Section 4. Electrical Components & Testing
©2001 Maytag Appliances Sales Company
4-6
HEATER ASSEMBLY
The heater assembly located in the sump
area of the outer tub is only on the
MAH7500, LCD washer only. A thermistor
located in the heater assembly monitors
the water termperature in order to cycle
the heater on/off to regulate the proper
temperatures.
Figure 4-7
b. If the fuse is functioning, check the
six semiconductors on the heat sink
visually for any damage. If damaged,
replace motor control/wire harness
assembly complete.
c. If no visible damage is present,
check motor windings for any open
circuits. (See Figure 4-8 & 4-9) Replace motor if necessary.
After the wash level has been reached, the
control will turn the heater on until the
heater thermistor indicticates the temperature reaches or exceeds the target main
wash temperature. Then the control will
de-energize the heater. The heater will be
turned back on when the heater thermistor
indicates the temperature falls below the
target main wash temperature – 5°F during
the main wash. The control will cycle the
heater off again when the temperature
reaches the target wash temperature.
The intent is to keep the temperature
between the target main wash temperature and 5°F below that. When the heater
is off, it will remain off for at least 10 seconds, and when the heater is turned on, it
will remain on for at least 10 seconds. The
heater should be turned off and will remain off when the maximum heater on
time limit is reached (37 minutes), or the
end of the wash period is reached. The
heater will be turned off at the beginning
of bleach fill at the end of main wash. The
heater will be turned off during add fills.
Figure 4-8
Heater Will Not Turn On
1 The heater will not turn on if the door is
not closed or if there is a problem with
the door sense circuit.
Figure 4-9
9. Unplug the washer power cord and
replace motor control board connector JP4 when finished.
16010486 (16008373-05)
Revised 02/01
Section 4. Electrical Components & Testing
©2001 Maytag Appliances Sales Company
4-7
2 The heater will not turn on if there is a
problem with the low water level
sense. The control is required to see
the low water level go from not satisfied to satisfied at the beginning of the
cycle before the heater is turned on.
The heater will be turned off within 30
seconds whenever the wash water
level becomes not satisfied.
3 The heater will never turn on for more
than the maximum heater on time of
37 minutes, and will not turn on outside of Presoak and the main wash
period.
Thermistor Temperature Chart
User S elections
a) C old wash - with
energy saver selected
Main Wash Tempering,
B ased on the Water
Valve Thermistor
(Min.-Max. Ohms)
(Min./Max. Ohms)
65º F/18º C
(65K-72K ohms)
No Heating
b) C old wash - with
energy saver de-selected
c) Warm wash - with
energy saver selected
Heat to 65º F/18º C
(15.3K - 16.8K ohms)
105º F/40.5º C
(20K-30K ohms)
d) Warm -with energy
saver de-selected
e) Hot wash - with energy
saver selected
f) Hot wash - with energy
saver de-selected
16010486 (16008373-05)
Revised 02/01
Heating Targets Using
the Heater B ased on the
Heater Thermistor
No Heating
Heat to 105º F/41º C
(6.2K-6.6K ohms)
Hot water
No Heating
Heat to 130º F/54º C
(3.9K-4. 1K ohms)
Section 4. Electrical Components & Testing
©2001 Maytag Appliances Sales Company
4-8
SECTION 5. TEARDOWN & WIRING INFORMATION
Warning - Always shut off
electrical power to the unit
before beginning any service repair procedures.
The replacement console assembly consists
of the console, medallion and membrane
pad.
CONSOLE REMOVAL
1. Disconnect power to the unit.
5. For reinstallation, reverse the aforementioned steps.
MICROPROCESSOR BOARD REMOVAL
1. Disconnect power to the washer.
2. Remove the console assembly.
3. Carefully remove the membrane pad
harness and other wires from the microprocessor board.
2. Remove the four screws securing the
console to the rear cover plate.
Figure 5-1
Figure 5-3
LCD MODEL
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 5-4
LED MODEL
Figure 5-2
16010486 (16008373-05)
Revised 10/00
Section 5. Teardown & Wiring Information
©2001 Maytag Appliances Sales Company
5-1
4. Remove the four mounting screws
securing the board to the console.
5. Remove the board from the console.
6. Note: To avoid the potential for accidental static discharge damage to the
replacement board, you must be
properly grounded prior to handling
the board. This can be accomplished
by using a special grounded strap tied
on your wrist and grounded to the
product, or simply touching a
grounded source to discharge any
static charge build up on your person.
7. Insert the replacement board into the
console and secure the mounting
bracket to the console.
8. Reattach wire harnesses and membrane pad harness to the replacement
machine control board.
CABINET ASSEMBLY
The overall cabinet assembly design is
identical to the MAH4000 washer, except
for the revised door lock mechanism,
door latch hoop and front shroud. for
simplicity reasons, we will address only
the exceptions in this chapter.
DOOR LATCH HOOP
The latch hoop was redesigned, eliminating the latch hoop support and spring.
REMOVAL
1. Remove the door assembly from the
washer.
2. Dissassemble the door assembly by
removing the outer door panel.
3. Locate the locking tab on the door
latch hoop and pry the tab up.
CONSOLE 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.
4. Squeeze the side tabs to disengage
the locating pins on the sides of the
latch hoop from the door liner.
5. Reinstallation is a reversal of the
aforementioned steps.
Figure 5-5
The cover plug simply fills a void area in
the console for cosmetic purposes only.
16010486 (16008373-05)
Revised 10/00
Figure 5-6
Section 5. Teardown & Wiring Information
©2001 Maytag Appliances Sales Company
5-2
DOOR LOCK MECHANISM
The door lock mechanism is now locked
and unlocked via solenoids, resulting in
faster locking and unlocking of the washer
door. The mechanism is a non-repairable
assembly and must be replaced as an
assembly.
An Emergency Access Cord is available
and is accessible by removing the dispenser 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.
DOOR LOCK MECHANISM
Emergency
Cord
Door
Lock/Unlock
Solenoid
Rotating
Cam
Door Open/Closed
Cam
Door Lock Switch
Mechanical
Support Spring
Opener
Solenoid
Push-Rod
Locking
Lever
Door Lock/
Unlock
Switch
Door Actuator
Lamp Socket
& Lamp
Figure 5-7
Removal
1. Disconnect power to the washer.
2. Remove the front panel, dispenser
bezel and lift the top cover to expose
the door lock assembly.
3. Remove the individual wire harnesses
from the assembly and the two mounting screws.
4. Roll the top of the door lock assembly
forward and lift from the front shroud
assembly.
16010486 (16008373-05)
Revised 10/00
Figure 5-8
Section 5. Teardown & Wiring Information
©2001 Maytag Appliances Sales Company
5-3
REAR ACCESS PANEL
5. Locate and loosen the valve mounting
screw by turning the screw at least
three full turns.
Removal of the access panel gains access to
the rear components of the washer
(Figure 5-9).
NOTE: The mounting screw serves as a
locating pin to hold the valve in position
on the 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.
Figure 5-9
WATER SYSTEM COMPONENTS
Warning - Always shut off
electrical power to the unit
before beginning any service repair procedures.
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 water valve.
WATER VALVE
The water valve is accessible from the
front of the machine. The flow rate of the
valve is 4 gpm.
Removal
1. Discontinue power and water to the
machine.
2. Remove the front panel and lift the top
cover.
3. Remove the wire harness connections
to the water valve solenoids.
4. Loosen and remove the hose clamps
on the inlet hoses leading away from
the water valve.
16010486 (16008373-05)
Revised 10/00
8. To reinstall, reverse the aforementioned
procedure.
PRESSURE SWITCH
The pressure switch was relocated from
the console and mounted to a bracket
extension molded as part of the pump
assembly. A vertical outlet on the pump
has a rubber cap positioned over the outlet
with a spout and is clamped into position.
The nipple of the pressure switch is inserted into the rubber spout. Pressurization in the vertical outlet of the pump
actuates the pressure switch and determines proper fill levels.
5-4
Section 5. Teardown & Wiring Information
©2001 Maytag Appliances Sales Company
REMOVAL
1. Remove the rear access panel or the
front panel to access the pressure
switch.
REINSTALLATION
1. Reverse the aforementioned steps 1-4.
2. IMPORTANT: Reposition the plastic bag
back onto the pressure switch.
2. Place a towel beneath the pump.
PUMP ASSEMBLY
3. Remove the plastic bag covering the
pressure switch. Press in the locking
tabs on the back of the pressure switch
and pivot the pressure switch off the
pump bracket.
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.
4. Grasp the pressure switch and lift the
nipple of the pressure switch from the
pump cap.
HEATER ASSEMBLY
Figure 5-13
Figure 5-11
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 temperature of
the heater to maintain proper water temperature when selected. The heater is
secured to the tub cover by means of
rubber compression. An inner mounting
plate is located opposite of the external
mounting plate with a layer of rubber
between. When the nut is secured, the
rubber is compressed and expands to seal
the heater entry hole in the tub cover.
Heater resistance is 14 ohms.
Figure 5-12
16010486 (16008373-05)
Revised 10/00
Section 5. Teardown & Wiring Information
©2001 Maytag Appliances Sales Company
5-5
REMOVAL
1. Disconnect power to the washer.
2. Remove the wires leading to the heater
assembly.
ture the detergent dispensed into the top
dispenser. By capturing the detergent, the
washer can provide a better mix of water
and detergent in the wash water. During
normal operation, the sump cover is
flushed of detergent during the wash cycle.
3. Locate the mounting nut and loosen the
nut by turning the nut in a counter
clockwise direction. This will
uncompress the rubber.
REMOVAL
4. Carefully remove the heater assembly
from the tub cover. (If the heater has
been in place for a period of time, the
rubber may have taken a set. Then a
complete tub cover removal would be
deemed necessary to push the heater
assembly out of the tub cover.)
2. Remove the mounting screw securing
the cover to the outer tub.
1. Remove the front panel, tub cover and
the spinner.
Figure 5-15
3. Lift the front of the sump cover and
disengage from rear lip of outer tub.
Figure 5-14
Thermistor Removal
The thermistor is press fitted into the
rubber seal of the heater. To remove,
simply push the thermistor out and reinsert
the replacement thermistor.
Figure 5-16
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 cap16010486 (16008373-05)
Revised 10/00
Section 5. Teardown & Wiring Information
©2001 Maytag Appliances Sales Company
5-6
WIRING INFORMATION
Please refer to the technical schematic packed in the control console in the washer for up to
date wiring information for the product your are servicing. The schematics on the following
pages are only a general reference at the time this manual was printed.
MAH5500B
16010486 (16008373-05)
Revised 10/00
Section 5. Teardown & Wiring Information
©2001 Maytag Appliances Sales Company
5-7
MAH7500
16010486 (16008373-05)
Revised 10/00
Section 5. Teardown & Wiring Information
©2001 Maytag Appliances Sales Company
5-8
Maytag Appliances Sales Company
Customer Service
240 Edwards Street, S.E.
Cleveland, Tennessee 37311