Technical Information – Top Load Washer
MAT12PDBA*, MAT12PDCB*, MAT12PRBA* MAT12PSBA* MAT12PDDA*, MAT12PDDB*,
MAT12PSDA*, MAT12PRDA*
• Due to possibility of personal injury or property damage, always contact an authorized technician for servicing or
repair of this unit.
• Refer to Service Manual 16022842 for detailed installation, operating, testing, troubleshooting, and disassembly
instructions.
!
CAUTION
All safety information must be followed as provided in Service Manual 16022842.
!
WARNING
To avoid risk of electrical shock, personal injury or death; disconnect power to washer before servicing, unless
testing requires power.
Models
Power Source
Voltage AC
Fuse Requirement
Frequency
Motor HP (single-phase, reversible)
Cabinet Dimensions
Height Overall (including lid open)
Height of Machine
Width
Depth
Weight
Crated (lbs/kg)
Uncrated (lbs/kg)
Water Temperatures
Water Levels
Overall Gallons (liters)
Adjustable Gallons (liters)
Inlet Hose Length
Drain Hose Length
Tub Capacity cubic feet (cubic meters)
Inner Tub (spin speed)
Agitation Speed (oscillations per minute)
December 2003
MAT12PDBA*, MAT12PDCB*, MAT12PRBA*,
MAT12PSBA*, MAT12PDDA*, MAT12PDDB*,
MAT12PSDA*, MAT12PRDA*
120 VAC
15 Amp
60 Hz
1/2 HP
52” (132.1 cm)
44-7/8” (114 cm)
25-1/2” (64.8 cm)
26-3/4” (67.9 cm)
224-lbs (102-kg)
198-lbs (90-kg)
3
2
31.5 (119.2)
29 (109.0)
4 feet (1.22 m.)
4 feet (1.22 m.)
2.5 cu.ft (0.07 cu.m.)
618 r.p.m.
150 o.p.m.
1
16022844 Rev 0
Component Testing Procedures
!
WARNING
To avoid risk of electrical shock, personal injury or death; disconnect power to washer before servicing, unless
testing requires power.
Illustration
Component
Control Board
Test Procedure
Proper grounding is necessary when
handling microprocessor board to
prevent damage from static electricity.
Results
See Control Board Connections
Section.
Touch Pad
Depress the proper button, checking
for continuity.
Continuity, if not replace.
Whites
Colors
Bright colors
Permanent Press
Wool
Delicate & Knits
Motor Relay
Reversing Relay
1
2
3
WH
L2
RD
4
5
6
RD
7
YL
RD
WH
8
9
BR
BU
A
B
PU
GY
Relay Coil: Grey to Orange/Black ------
Approx 350 – 450 Ω
Switch Terminals: Common to N.O.----
Internal switch circuit is open. If switch
is welded closed, replace switch.
Relay Coil Energized----------------------Relay coil: Purple and Gray (A to B)----
24VDC. Check for signal from control
board if not present.
Approximately 350 – 450 Ω
Terminals and Wires:
Agitate (1) White to (7) Yellow---------(3) Red to (9) Blue--------------(7) Yellow to (4) Red------------(9) Blue to (6) White-------------
Closed circuit
Closed circuit
Open circuit
Open circuit
Vault and Service
Switch
Disconnect wire terminals from switch.
Check for continuity between
terminals: Common to N.O.
Circuit is open until switch plunger is
depressed. If not, replace switch.
Pressure Switch
Disconnect wire terminals from switch.
Measure resistance across the
following terminals:
Empty (Filling) 20 to 15--------------------
Resistance above 2 Ω indicates dirty
switch contacts.
Full (Run) 20 to 15 -------------------------
Open circuit
Check for coin Movement.
Restricted: Clean and adjust if
necessary.
Adjust guide rail if necessary.
Examine Pinch adjustment.
Bend two deflector scoops if necessary.
Coin Drop
Diameter of Coin---------------------------Thickness of Coin--------------------------Rear of Chute (Penny Window)----------
16022844 Rev 0
1 to 3
1 to 2
1 to 4
5 to 3
5 to 2
5 to 4
2
Closed circuit
December 2003
Component Testing Procedures
!
WARNING
To avoid risk of electrical shock, personal injury or death; disconnect power to washer before servicing, unless
testing requires power.
Illustration
Component
Step -Down
Transformer
Coin Sensor
Test Procedure
Check voltage.
Primary Side:--------------------------------Secondary Side:
AA6-1 to AA6-2-----------------------------AA6-1to AA6-5 ----------------------------AA6-2 to AA6-5----------------------------AA6-3 to AA6-6-----------------------------Check for coin registering.
Coin Sensor Voltage Checks:
1) Blocked- White to Red-----------------
Results
2.65 VAC
2.65 VAC
5.3 VAC
22.5 VAC
Display flashes an “*” in “Service Mode”
when coin is inserted.
23 VDC
2) Unblocked- White to Red--------------
0.6 VDC
3) Continuously- Blue to White /Blue---
1.5VDC Note: Replace sensor if voltage
is 23VDC (Open Diode),or 0 VDC
(Shorted Diode).
Approximately 850-950 Ω
120 VAC
Water Valve
Measure resistance across the
terminals of each coil on the valve.
Motor
Type of Motor:
Single speed (Split phase).
See “Motor Testing” section for
correct wiring contact.
Pump
Verify drain pump is not clogged or
damaged.
1) Remove clog and verify proper
operation.
2) Replace drain pump if damaged.
Transmission
Belts
Lid Switch
Type of transmission (orbital):
618 r.p.m. Spin
150 o.p.m. Agitate
Refer to section on “Transmission”
Disassembly Procedures in base
manual.
Check wattage with full tub of water
only (Use Wattage Meter).
Check belt for excessive wear or being
burnt and cracking.
380 to 420 watts
Check for Continuity between the
following terminals:
Line to Machine (Lid Open) -------------Line to Motor (Lid Closed)---------------Line to Machine (Lid open or Closed)--
December 2003
Replace if belt if damaged.
3
Closed Circuit
Closed Circuit
Closed Circuit, If not replace lid switch.
16022844 Rev 0
Component Testing Procedures
!
WARNING
To avoid risk of electrical shock, personal injury or death; disconnect power to washer before servicing, unless
testing requires power.
MOTOR TESTING
All four leads of the test cord are required to test the washer drive motor. The following drawings show installation of the test
cord on the drive motor. Reversing the motor to agitate or spin is accomplished by reversing wires B and C.
Agitation
Spin
Windings
Run Winding
Start Winding
Over-load
16022844 Rev 0
Wiring Harness Connections
Red to White or Black
Yellow to Blue
White to Black
4
Readings
1.5Ω
3Ω
0Ω
December 2003
Component Testing Procedures
!
WARNING
To avoid risk of electrical shock, personal injury or death; disconnect power to washer before servicing, unless
testing requires power.
Control Board
AA2
AA5
AA1
ConnectorPin
Wire Color
EE1
AA4
Description
AA1-1
AA1-2
AA1-3
Service and Vault Switch
Black
Vault Switch
Yellow
Service switch
Orange
Common (AA1-1 to AA1-2)
AA2-1
AA2-2
AA2-3
AA2-4
AA2-5
AA2-6
AA2-7
AA2-8
AA2-9
AA2-10
----Purple
----Pink
Relays
----24 VDC Reversing Relay
----Power for off board relay
Debit Card Connections
Available 2
Available 1
Enable 1
Enable 2
Debit Power
Debit Ground
AA3-1
AA3-2
AA3-3
AA3-4
AA3-5
AA3-6
-------
AA4-1
AA4-2
AA4-3
AA4-4
Coin Sensor #1
Blue
Anode coin #1 L.E.D.
Red
Collector Photo transistor
White
Emitter Photo transistor
White/Blue
Cathode L.E.D.
December 2003
AA6
AA3
AA7
ConnectorPin
AA5-1
AA5-2
AA5-3
AA5-4
AA6-1
AA6-2
AA6-3
AA6-4
AA6-5
AA6-6
AA7-1
AA7-2
AA7-3
AA7-4
AA7-5
AA7-6
AA7-7
AA7-8
EE1-1
EE1-2
EE1-3
EE1-4
5
Wire Color
Description
Coin Sensor #2
Blue
Anode coin #1 L.E.D.
Red
Collector Photo transistor
White
Emitter Photo transistor
White/Blue
Cathode L.E.D.
--------
Board Power Source
Center Tap
5.3 VAC (AA6-2 to AA6-5)
22.5 VAC (AA6-3 to AA6-6)
-5.3 VAC (AA6-5 to AA6-2)
22.5 VAC (AA6-6 to AA6-3)
Power and Main Components
--Grey #20
120 Line/ Lid Switch
Orange
Hot Water Valve Coil
Brown #15
Pressure Switch
Red
120 Neutral
Black
Motor Sense
Purple
24 VDC Motor Relay1
Blue
Cold Water Valve Coil
+
−
Battery
Positive Side
--Negative Side
16022844 Rev 0
Component Testing Procedures
!
WARNING
To avoid risk of electrical shock, personal injury or death; disconnect power to washer before servicing, unless
testing requires power.
PROGRAMMING PROCEDURES
CODE
607
DISPLAY
6
07
EXPLANATION
REGULAR CYCLE PRICE
Represents the number of coins. See value of Coin 1 and Coin 2. Adjustable from 0-39 coins by
pressing the Permanent Press keypad. NOTE: PS MODELS ONLY- Represent the number of
push-in actuations of the coin slide.
Press Woolens keypad once to advance to next code.
710
7
10
WASH & AGITATION CYCLE
This is the number of minutes for Wash. Adjustable from 8-15 minutes by pressing the Permanent
Press keypad.
Press Woolens keypad once to advance to next code.
811
8
RINSE CYCLES
Represents the length and number of rinses (except “woolens” and “delicates”). The middle digit
is length of rinse agitation (1 to 4 minutes) and the last digit is number of rinses (1or 2). Advance
rinse option by pressing Permanent Press keypad.
Press Woolens keypad once to advance to next code.
900
9
00
OC
CYCLE COUNTER OPTION
“OFF."
ON." Press Delicates & Knits keypad three consecutive times to select "OC" and three
consecutive times to turn “OFF” ("00"). Reset counter by going from "OC" to "00."
Press Woolens keypad once to advance to next code.
1.00
1.
00
0C
MONEY COUNTER OPTION
“OFF”
“ON”. Press Delicates & Knits keypad three consecutive times to select "OC". Counter resets by
going from “OFF” to “ON”.
To select “On” and not turn off. First select “ON”, then within two seconds press Delicates & Knits
twice, Permanent Press Once, and exit the setup mode.
C0
2.00
2.
00
SP
SPECIAL PRICING OPTION.
"OFF."
"ON." Press Delicates & Knits keypad once to select "SP."
Steps "3." thru "9." codes are skipped if mode "2.00" is selected.
Press Woolens keypad once to advance to next code.
3.07
3.
07
SPECIAL CYCLE PRICE
Represents the number of coins. Adjustable from 0 - 99 by pressing the Permanent Press
keypad.
Press Woolens keypad once to advance to next code.
5.00
5.
00
MINUTES
This is the selection "MINUTES" of the time of day clock. Adjustable from 0 to 59 by pressing the
Permanent Press keypad.
Press Woolens keypad once to advance to next code.
6.00
6.
00
HOUR
This is the selection "HOUR" of the time of day clock using military time (24 hour clock).
Adjustable from 0 to 23 by pressing the Permanent Press keypad.
Press Woolens keypad once to advance to next code.
7.00
7.
00
SPECIAL PRICING STARTING HOUR
This is the selection of the hour using military time (24 hour clock) that the Special Pricing will
"begin “. Adjustable from 0 to 23 by pressing the Permanent Press keypad.
Press Woolens keypad once to advance to next code.
16022844 Rev 0
6
December 2003
Component Testing Procedures
!
WARNING
To avoid risk of electrical shock, personal injury or death; disconnect power to washer before servicing, unless
testing requires power.
CODE
8.00
DISPLAY
8.
00
EXPLANATION
SPECIAL PRICING STOPPING HOUR
This is the selection of the hour using military time (24 hour clock) that the Special Pricing will "stop."
Adjustable from 0 to 23 by pressing the Permanent Press keypad.
Press Woolens keypad once to advance to next code.
9.10
9.
SPECIAL PRICE DAYS
Represents the day of the week and if special pricing is to occur on that day of the week. The last
digit is "0" for OFF or "S" for ON.
Press the Delicates & Knits keypad once to select "0" and once for "S."
Press Permanent Press keypad to advance to next day of the week.
Press Woolens keypad once to advance to next code.
10
A.00
A.
00
SC
VAULT VIEWING
"OFF."
"ON." Press Delicates & Knits keypad once to select "SC." The money and/or cycle counter will be
viewable when the vault is opened. If "00" is selected, the service door will need to be opened to
activate, to view the money and/or cycle counter.
Press Woolens keypad once to advance to next code.
b.05
b.
VALUE OF COIN 1 (QUARTER DROP)
Represents the number of nickels given to the value of each coin in code 607 "regular cycle price" or
"special cycle price." For example: b.05 equals five nickels or one quarter. Press Permanent Press
keypad to advance from 1 to 99 in nickels.
Press Woolens keypad once to advance to next code.
05
C.20
C.
20
VALUE OF COIN 2 (DOLLAR DROP)
Represents the number of nickels given to the value of each Dollar dropped in the dollar coin slot.
For example: C.20 equals twenty nickels or one dollar. Press Permanent Press keypad to advance
from 1 to 99 in nickels.
Press Woolens keypad once to advance to next code.
d.00
d.
00
CS
COIN SLIDE OPTION
"OFF"
"ON”. Press Delicates & Knits keypad once to select "00" when coin drop is used, and "CS" for
models not using coin drops.
Press Woolens keypad once to advance to the next code.
E.00
E.
ADD COINS OPTION
This option causes the customer display to show the number of coins (coin 1) to enter, rather than
the dollar and cents amount.
“OFF”
“ON”. Press Delicates & Knits keypad 3 consecutive times for this selection.
Press Woolens keypad once to advance to the next code.
00
AC
F.00
F.
00
CP
Su
ENHANCED PRICING OPTION
“OFF”
Cycle Based Pricing-- Allows configuration of different prices for cold, warm and hot water cycles.
Super Cycle Pricing-- This allows customers to upgrade cycles by depositing extra money. Setup
codes “H” and “h” will only display when this option is turned “ON”.
Press Delicates & Knits keypad 3 consecutive times for this selection.
Press Woolens keypad once to advance to the next code.
H.01
H.
SUPER CYCLE UPGRADE PRICE (Skipped unless super cycle pricing is selected “F.Su”.)
This represents the number of coin 1 required to upgrade a base cycle to super cycle. Advance
from 0-39 by pressing Permanent Press keypad.
Press Woolens keypad once to advance to the next code.
01
December 2003
7
16022844 Rev 0
Component Testing Procedures
!
WARNING
To avoid risk of electrical shock, personal injury or death; disconnect power to washer before servicing, unless
testing requires power.
CODE
h.01
DISPLAY
h.
01
J.Cd
J.
Cd
C_
_d
Ed
L.00
L.
00
PS
n.CE
n.
00
CE
U.00
U.
00
EXPLANATION
SUPER CYCLE TYPE (Skipped unless super cycle pricing is selected “F.Su”.)
This represents the super cycle upgrade option. Press Permanent Press keypad to step through
upgrade option 1 through 3 as follows:
01-enhanced wash, extra 3 minutes of wash tumble in addition to programmed wash time.
02- extra rinse for all cycles, final warm rinse for WHITES, COLORS, and DELICATE & KNITS.
03- both 01 and 02.
Press Woolens keypad once to advance to the next code.
COIN/DEBIT OPTION
Press Delicates & Knits keypad 3 consecutive times for this selection
Both coin and debit turned “ON”.
Coins selected, debit disabled.
Debit card selected and coins disabled.
Enhanced debit is self-selected when a Generations 2 card reader is installed in the washer. The
“Ed” option cannot be manually turned “ON” and “OFF”.
Press Woolens keypad once to advance to the next code.
PRICE SUPRESSION OPTION
This option causes the customer display to show “ADD or “AVAILABLE” rather than the amount of
money to add (Used mainly in debit installation). Press Delicates & Knits once to turn “ON” or “OFF”.
“OFF”
“ON”
Press Woolens keypad once to advance to the next code.
CLEAR ESCROW OPTION
When elected, money held in escrow for 30 minutes without further escrow or cycle activity will be
cleared. Press Delicates & Knits once to turn “ON” or “OFF”.
“OFF”
“ON”
Press Woolens keypad once to advance to the next code.
PENNY INCREMENT OFFSET
This represents the penny increment price offset used un Generation 2 (enhanced Debit) PR
models. Choose from 0-4 pennies by pressing the Permanent Press keypad.
Press Woolens keypad once to advance to the next code.
WASHER DIAGNOSTIC CYCLE
The mode is entered by depressing Delicates & Knits keypad for one second while in any of the set-up modes one
through six or with a diagnostic code present. Diagnostic codes are cleared on entry and all display segments
should flash. If a diagnostic code persists, it must be corrected before the diagnostic cycle will start. With all
segments flashing, depressing the Woolens keypad starts the diagnostic cycle.
Display
Function
Time Length
C
Cold Fill
3 seconds
H
Hot Fill
3 seconds
CH
Warm Fill
3 seconds
A
Agitation
3 seconds
S
Spin
9 Seconds
Note: 1) Woolens keypad can be used to pause/resume the diagnostic cycle.
2) Delicate & Knits keypad will cancel the cycle and exit the diagnostic mode.
3) Permanent Press keypad, “CC”(Free cycle) will be displayed. When you exit the service mode
“Select Cycle” will be displayed.
16022844 Rev 0
8
December 2003
Component Testing Procedures
!
WARNING
To avoid risk of electrical shock, personal injury or death; disconnect power to washer before servicing, unless
testing requires power.
Washer
diagnostic
Program
No user program should be in
progress. The lid should be
closed and the washer tub
should be empty before running
this test.
Enter operator mode using service
switch. Push the delicates and
knits program keypad for more
than one second.
With entire display blinking on
and off, if any segments of the
entire display are not working,
replace the control board.
Push the woolens program
keypad to start the diagnostic
program.
Does "C" appear in the
display?
Yes
Does cold water run when "C"
is in the display?
No
Does "A" appear in the
display?
Push the woolens program keypad
to stop / start the diagnostics in the
current phase.
No
Water level looks full; Go
to "A".
Does hot water run when "C" is
in the display?
The hoses may be crossed or
the water valve miswired.
Yes
No
Yes
If washer will not fill, agitate or
spin, unplug washer and check for
continuity of lid switch.
Does switch check closed with
lid closed?
Adjust lid switch or replace
switch if necessary.
No
Yes
Does hot water run when "H" is in
the display?
Push the woolens program keypad
to stop / start the diagnostics in
the current phase.
No
Check wiring and terminations
between water valves, pressure
switch and control board.
Does 115VAC appear between the
brown and red wires on connector
AA7?
Check water shutoff valves,
filter screens and hose routing.
Replace pressure switch or
hose.
No
Yes
Yes
Replace water valve.
Yes
Does 115VAC appear between the
blue and red wires (cold water
check) or orange and red wires
(hot water check) on the control
board edge connector AA7?
No
Replace control board
Warm water runs when "Ch" is in
the display.
Yes
December 2003
9
16022844 Rev 0
Component Testing Procedures
!
WARNING
To avoid risk of electrical shock, personal injury or death; disconnect power to washer before servicing, unless
testing requires power.
Does washer agitate when "A"
is in the display?
No
Push the woolens program keypad
to stop the diagnostics in the
current phase.
Does washer spin when "A" is
in the display?
Yes
Check wiring and terminations
between control board, motor relay
and motor. Make sure motor is not
bad or tripped out on thermal
protection.
Does 25 VDC appear across the
reversing relay?
No
No
Yes
Replace reversing relay.
Yes
Does 25 VDC appear across the
motor relay coil?
Yes
Replace control board.
Does washer spin when "S" is
in the display?
No
No
Replace control board.
Replace motor relay.
Check wiring and terminations
between the control board and spin
relay. Make sure motor is not bad
or tripped out on thermal protector.
Push the woolens program keypad
to stop / start the diagnostics in the
current phase.
No
Yes
Does 25 VDC appear across the
reversing relay coil?
Yes
Replace reversing relay.
Washer checks ok.
No
If desired push the delicates and
knits program key pad to cancel
the diagnostic program any time.
16022844 Rev 0
Exit operator mode using
service switch.
10
Replace control board.
December 2003
Component Testing Procedures
!
WARNING
To avoid risk of electrical shock, personal injury or death; disconnect power to washer before servicing, unless
testing requires power.
WASHER HELP MODE
The mode is entered by depressing Permanent Press keypad while in special pricing option Step 2.XX(or while dAS
displays if operation with Maytag Data Acquisition setup). In help mode , the Woolens keypad can be used to
advance through three help codes(displayed as 1h.XX, 2h.XX, and 3h.XX). Pressing Delicates & Knits keypad
while any of the help codes are displayed clears the three help codes.
Display Symbol
WASH
Inputs and Output Function
Water sensed at wash level
*
Circle above digit
OR
COLD
HOT
DETERGENT
SPIN
Low voltage present (below 90 VAC)
Lid closed
Motor sensed running
Cold water relay on
Hot water relay on
Motor relay on
Spin(reversing) relay on
WASHER HELP CODES
Code
20
21
Problem
Filling too quickly during cycle
Losing water during cycle (siphoning)
Description
Pressure switch opens sooner then expected
Added more water during agitation
DIAGNOSTIC CODES
Diagnostic Codes
d1
d4
d5
d7
d8
d9
d12
d13
d16
December 2003
Description
Water level circuit failure on control board
Lid switch circuit failure on control board
Blocked coin 1 or coin drop control circuit failure
Slow fill detected; fill time greater than 5 minutes
Slow drain detected; drain time greater than 2 minutes
Low voltage detected; less than 90 volts AC
Motor sensor circuit failure on control board
Blocked coin 2 or coin drop control circuit failure
Control board not receiving communication from debit card reader
11
16022844 Rev 0
Component Testing Procedures
!
WARNING
To avoid risk of electrical shock, personal injury or death; disconnect power to washer before servicing, unless
testing requires power.
d1
Try to clear diagnostic
code by pushing delicate
and knits keypad for one
second.
False diagnostic indication.
Control board is ok.
Yes
Did diagnostic code
cancel?
No
d4
Try to clear diagnostic
code by pushing delicate
and knits keypad for one
second.
Replace control board.
False diagnostic indication.
Control board is ok.
Yes
Did diagnostic code
cancel?
No
d5
Check wiring and
terminations between
first coin drop and
control board.
d7
Check for plugged
screen on fill hoses.
d8
Check drain hose for
being plugged or kinked.
d9
Replace control board.
Check for object blocking
first coin drop optic
sensor. Then check
transformer for loss of 24
circuit .
Check transformer for
loss of 24 VDC circuit.
This diagnostic code will appear routinely
if washer fills slowly and may be ignored if
the water pressure is very low.
This failure code will
appear routinely if
washer drains slowly.
Check pump belt for
proper tension.
This diagnostic code indicates a
low voltage condition has occurred.
check installation to insure proper
power to washer.
False failure indication
control board is ok.
Yes
d12
Try to clear diagnostic code by
pushing delicate and knits keypad
for one second.
This failure does not affect the
operation of the control. It will only
affect no run counts in an Accutrac
environment. It can be corrected by
replacing the control board.
Did failure code cancel?
No
d13
d16
Check wiring and terminations
between second coin drop and
control board.
Is card reader
installed?
Check for object blocking
second coin drop optic
sensor.
Check wiring between debit card
reader and control board.
Yes
Power down and
up machine to
reset card
reader.
Replace second coin drop
optic sensor if F13 still
appears in display.
Replace card
reader or control
board.
No
Install reader or use PDA to change mode
out of Gen 2 debit mode.
16022844 Rev 0
12
December 2003
Component Testing Procedures
!
WARNING
To avoid risk of electrical shock, personal injury or death; disconnect power to washer before servicing, unless
testing requires power.
TROUBLESHOOTING CONTROL BOARD FLOW CHART
Display is
Blank
Enter operator mode
using service switch.
Does display contain a
diagnostic code?
Make sure washer
is plugged in to
live power source
Enter diagnostic
code trouble
shooting guide
Yes
No
Unplug washer and check
wiring and termination
between transformer, service
switch and control board
Is voltage correct on
secondary side of the
transformer?
No
Yes
Does 115 VAC
appear across the
primary of the
transformer?
Initiate the manual
reset sequence
No
Check wiring to
transformer and
power at outlet
If problem still
exists replace
control board
Yes
Replace the transformer.
Inspect control board for
burned components and
replace it if damaged.
Shorted diodes will
damage new transformer.
Abnormal
display or
function
December 2003
Initiate the manual
reset sequence
Clean lint off of
control board
display wires.
13
If problem still
exists replace
control board
16022844 Rev 0
Component Testing Procedures
!
WARNING
To avoid risk of electrical shock, personal injury or death; disconnect power to washer before servicing, unless
testing requires power.
Washer stuck
with 0 minutes
remaining in
display
Lift washer lid. Did
display change?
Yes
The washer lid must be
opened after a program
ends before the washer
will operate again
Yes
Check wiring and
termination between lid
switch and control board
No
Unplug washer
and check
continuity of lid
switch as lid is
raised and lowered
Does lid switch
open and close
properly? Is lid
switch wet?
Plug in washer. If
problem still exists
replace control
board
No
Adjust lid switch or
replace it if
necessary
Control does not
respond to
program key
inputs
Does display show
"select cycle"?
Yes
Check touch pad in service
mode. Does control board
respond? Unplug washer
and check membrane switch
tail connection. Plug washer
back in .
If problem still exist
replace membrane
switch
No
Put proper number
of coins into coin
drop
16022844 Rev 0
If problem still
exist replace
control board
14
December 2003
Component Testing Procedures
!
WARNING
To avoid risk of electrical shock, personal injury or death; disconnect power to washer before servicing, unless
testing requires power.
Will not respond
to handheld PDA
Does PDA
respond to other
machines?
Check optic
window for
obstructions, dirt,
or scratches.
Yes
No
No response to
coin 1
PDA has failed.
If problem still
exists replace
control board
Is display blank?
Is coin slide option
selected?
No
Yes
No
See blank display
section in trouble
shooting guide
Check the coin
mechanism for
proper adjustment.
Timings for the coin
slide mode will cause
coins to not be
recognized. Deselect
the coin slide mode.
Yes
Check wiring and
termination between first
coin drop and control
board
Check lighting. Too
much ambient light in
the coin drop will cause
coins not to be
recognized.
No
Yes
Reconnect
connector and
plug in washer
If problem still
exist replace
control board
If problem still
exists replace first
coin optic sensor
December 2003
Unplug washer and check
resistance between the
red wire and the white
wire in connector
AA4. Is resistance
greater than 10K ohms?
15
16022844 Rev 0
Component Testing Procedures
!
WARNING
To avoid risk of electrical shock, personal injury or death; disconnect power to washer before servicing, unless
testing requires power.
No response to
coin 2
Is display blank?
No
Check the coin
mechanism for
proper adjustment.
Yes
Check wiring and
termination between
second coin drop and
control board
See blank display
section in trouble
shooting guide
Check lighting. Too
much ambient light in
the coin drop will cause
coins not to be
recognized.
No
Unplug washer and check
resistance between the
red wire and the white
wire in connector
AA4. Is resistance
greater than 10K ohms?
Yes
If problem still
exists replace
second coin optic
sensor
Will not keep
time of day
during power
interruptions
Is a battery
installed?
Reconnect
connector and
plug in washer
If problem still
exist replace
control board
Yes
Does greater than 3.4 VDC
appear between the red and
black wires of the battery?
No
Replace battery
No
Yes
A battery must be
installed in order to keep
time of day during power
interruptions.
Check battery
connector and
terminations
If problem still
exists replace
control board
16022844 Rev 0
16
December 2003
Component Testing Procedures
!
WARNING
To avoid risk of electrical shock, personal injury or death; disconnect power to washer before servicing, unless
testing requires power.
"Unbalance"
stays in display
Unplug washer check
wiring and terminations
between lid switch and
control board
Adjust lid switch or
replace it if
necessary
Cannot enter or
cannot exit operator
mode
December 2003
Does switch open
and close
properly?
No
Plug in washer
replace control board
if problem still exists
Yes
Check wiring and
terminations between
service switch and control
board
Check for proper
adjustment of service
switch
Replace control
board
Operator options
revert to defaults
Check continuity of
lid switch as lid is
raised and lowered
Does service switch
open and close
properly?
Yes
Setup operator options as
desired unplug washer for
2 minutes then plug in
washer
No
Replace service
switch
If problem still exists
replace control board
17
16022844 Rev 0
Component Testing Procedures
!
WARNING
To avoid risk of electrical shock, personal injury or death; disconnect power to washer before servicing, unless
testing requires power.
Display flashes in
user Mode
Replace control
board
Water runs
without program
selected
Unplug washer.
Does water still
run?
Unplug washer and connector AA1.
Check for continuity between orange
wire on connector AA1-3 and orange
wire on connector AA1-1 while
cycling vault switch
Check wiring and
terminations between
vault switch and control
board
Check for proper
adjustment of
vault switch
Yes
Does vault switch
open and close
properly?
No
Check wiring and
terminations between
control board and water
valve
No
Replace vault
switch
If problem still
exists replace
control board
Yes
Replace water
valve
No hot water or
cold water
Spin instead of
agitating
No spin or
agitate
16022844 Rev 0
Run washer
diagnostics
program
Run washer
diagnostics
program
Run washer
diagnostics
program
18
December 2003
Wiring Diagram
!
WARNING
To avoid risk of electrical shock, personal injury or death; disconnect power to washer before servicing, unless
testing requires power.
LID
SWITCH
BATTERY
OPTIONAL
A2
DEBIT GROUND
DEBIT POWER
E2
E1
A1
MAT12PDBA*, MAT12PDCB*, MAT12PSBA*, MAT12PDDA*, MAT12PDDB*,
MAT12PSDA* SCHEMATIC
(-)
(+)
4
6
4
3
2
2
1
1
CONNECTOR EE1
(SEE CIRCUIT BOARD)
CONNECTOR AA3
EXTERNAL DEBIT CARD
(OPTIONAL)
LINE
CONNECTOR
L1
N
5
3
WATER LEVEL
SWITCH
FULL
20 GY
RD
WH
GY 20
RD
TRANSFORMER
WH
RD
15 BR
RL-9
COMMON
PU/WH
RL-9
OFF BOARD
MOTOR RELAY
22.5
VAC
GY 20
PU/WH
BK
5.3VAC
BK
BK
BR
COIN SENSOR # 1
DRIVE
MOTOR
OVERLOAD
PROTECTOR
COIN SENSOR # 2
(OPTIONAL)
RUN
START
CENT
SW
WH
CONNECTOR AA4
CONNECTOR AA5
2
3
2
1
CONNECTOR AA1
REVERSING
RELAY
8
B
5
A
9
3
RD
7
6
1
WH WH
WATER
VALVE
- INSULATED TERMINAL
December 2003
OR
4
RD
BU
BU
RD
REVERSING RELAY
CONTACT
1
2
3
WH WH RD
4
5
6
RD RD WH
7
9
8
YL BR-RD BU
A
B
PU
PK
HOT
SERVICE
SWITCH
COLD
VAULT
SWITCH
PU/WH
BK
WH
RD
GND
RD
GY 20
OR
15 BR
CONNECTOR AA2
(SEE CIRCUIT BOARD)
CONNECTOR AA7
(SEE CIRCUIT BOARD)
19
16022844 Rev 0
Wiring Diagram
!
WARNING
To avoid risk of electrical shock, personal injury or death; disconnect power to washer before servicing, unless
testing requires power.
LID
SWITCH
6
4
3
2
1
CONNECTOR AA3
EXTERNAL DEBIT CARD
(OPTIONAL)
LINE
CONNECTOR
L1
N
5
A2
DEBIT GROUND
DEBIT POWER
E2
E1
A1
MAT12PRBA*, MAT12PRDA SCHEMATIC
WATER LEVEL
SWITCH
FULL
20 GY
RD
WH
GY 20
RD
15 BR
RL-9
COMMON
PU/WH
RL-9
OFF BOARD
MOTOR RELAY
RD
GY 20
PU/WH
BK
22.5
VAC
5.3VAC
BK
BK
CONNECTOR AA6
(SEE CIRCUIT BOARD)
BR
TRANSFORMER
CENT
SW
1
CONNECTOR AA1
(SEE CIRCUIT BOARD)
RUN
2
START
3
DRIVE
MOTOR
OVERLOAD
PROTECTOR
WH
BATTERY
OPTIONAL
(-)
(+)
4
3
2
1
2
8
B
5
A
9
3
RD
7
6
1
WH WH
WATER
VALVE
HOT
REVERSING
RELAY
OR
4
RD
1
2
3
WH L2
RD
4
5
6
RD
WH
7
8
9
YL BR-RD BU
A
B
PU
PK
- INSULATED TERMINAL
16022844 Rev 0
BU
BU
RD
REVERSING RELAY
CONTACT
COLD
CONNECTOR EE1
(SEE CIRCUIT BOARD)
PU/WH
BK
WH
RD
RD
GY 20
OR
15 BR
GND
CONNECTOR AA2
(SEE CIRCUIT BOARD)
20
CONNECTOR AA7
(SEE CIRCUIT BOARD)
December 2003