Maytag MAT12PDSA, MAT12PRSA Technical Information

Technical Information – Top Load Washer

MAT12PDSA*, MAT12PRSA*

• 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.

!

To avoid risk of electrical shock, personal injury or death; disconnect power to washer before servicing, unless
testing requires power.

Models MAT12PDSA*, MAT12PRSA*
Power Source

Voltage AC 120 VAC
Fuse Requirement 15 Amp
Frequency 60 Hz
Motor HP (single-phase, reversible) 1/2 HP

Cabinet Dimensions

Height Overall (including lid open) 52” (132.1 cm)
Height of Machine 44-7/8” (114 cm)
Width 25-1/2” (64.8 cm)
Depth 26-3/4” (67.9 cm)

Weight

Crated (lbs/kg) 224-lbs (102-kg)
Uncrated (lbs/kg) 198-lbs (90-kg)

Water Temperatures
Water Levels

Overall Gallons (liters) 31.5 (119.2)
Adjustable Gallons (liters) 29 (109.0)

Inlet Hose Length
Drain Hose Length
Tub Capacity cubic feet (cubic meters)
Inner Tub (spin speed)
Agitation Speed (oscillations per minute)

WARNING

3
2

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.

December 2003 16022846 Rev 0

1

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 Test Procedure Results

1

WH 2 L2 3 RD

4

RD 5 RD 6 WH

8

7

BR 9 BU

YL

A

PU

B

GY

Control Board Proper grounding is necessary when

Touch Pad

handling microprocessor board to
prevent damage from static electricity.

Depress the proper button, checking
for continuity.

Whites

Colors
Bright colors
Permanent Press
Wool
Delicate & Knits

Motor Relay Relay Coil: Grey to Orange/Black ------

Reversing Relay

Vault and Service
Switch

Switch Terminals: Common to N.O.----

Relay Coil Energized-----------------------

Relay coil: Purple and Gray (A to B)----

Terminals and Wires:
Agitate (1) White to (7) Yellow---------­ (3) Red to (9) Blue--------------­ (7) Yellow to (4) Red------------­ (9) Blue to (6) White-------------

Disconnect wire terminals from switch.
Check for continuity between
terminals: Common to N.O.

See Control Board Connections
Section.

Continuity, if not replace.

1 to 3
1 to 2
1 to 4
5 to 3
5 to 2
5 to 4

Approx 350 – 450 Ω

Internal switch circuit is open. If switch
is welded closed, replace switch.

24VDC. Check for signal from control
board if not present.

Approximately 350 – 450 Ω

Closed circuit
Closed circuit
Open circuit
Open circuit

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--------------------

Full (Run) 20 to 15 -------------------------

Coin Drop Check for coin Movement.

Diameter of Coin---------------------------­Thickness of Coin--------------------------­Rear of Chute (Penny Window)----------

Resistance above 2 Ω indicates dirty

switch contacts.

Closed circuit

Open circuit

Restricted: Clean and adjust if
necessary.
Adjust guide rail if necessary.
Examine Pinch adjustment.
Bend two deflector scoops if necessary.

16022846 Rev 0 December 2003

2

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 Test Procedure Results

Step-Down
Transformer

Coin sensor Check for coin registering.

Water Valve Measure resistance across the

Motor Type of Motor:

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------------------------------

Coin Sensor Voltage Checks:

1) Blocked- White to Red-----------------

2) Unblocked- White to Red--------------

3) Continuously- Blue to White /Blue---

terminals of each coil on the valve.

Measure resistance across thermistor

terminals water temperature (60°F ­140°F degrees).

Single speed (Split phase)

120 VAC

2.65 VAC

2.65 VAC

5.3 VAC

22.5 VAC
Display flashes an “*” in “Service Mode”.

23 VDC

0.6 VDC

1.5VDC Note: Replace sensor if voltage
is 23VDC (Open Diode),or 0 VDC
(Shorted Diode),

Approximately 850-950 Ω

Approximately 10K-85KΩ

See “Motor Testing” section for
correct wiring contact.

Pump Verify drain pump is not clogged or

damaged.

Transmission Type of transmission (orbital):

618 r.p.m. Spin
150 o.p.m. Agitate

Check wattage with full tub of water
only (Use Wattage Meter).

Belts Check belt for excessive wear or being

burnt and cracking.

Lid Switch (series 15) Check for Continuity between the

following terminals:

Line to Machine (Lid Open) -------------­Line to Motor (Lid Closed)---------------­Line to Machine (Lid open or Closed)--

1) Remove clog and verify proper
operation.

2) Replace drain pump if damaged.

See section on “Transmission”
disassembly procedures in base
manual.

380 to 420 watts

Replace if belt if damaged.

Closed Circuit
Closed Circuit
Closed Circuit, If not replace lid switch.

December 2003 16022846 Rev 0

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Component Testing Procedures

Agitation

!

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.

WARNING

Spin

Windings Wiring Harness Connections Readings

Run Winding Red to White or Black
Start Winding Yellow to Blue
Over-load White to Black

1.5Ω
3Ω
0 Ω

16022846 Rev 0 December 2003

4

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 EE1

Connector-

Pin

AA1-1 Black Vault Switch AA5-1 Blue Anode coin #1 L.E.D.
AA1-2 Yellow Service switch AA5-2 Red Collector Photo transistor
AA1-3 Orange Common (AA1-1 to AA1-2) AA5-3 White Emitter Photo transistor

AA5-4 White/Blue Cathode L.E.D.

AA2-1 -- --
AA2-2 -- -­AA2-3 -- -- AA6-1 -- Center Tap
AA2-4 -- -- AA6-2 -- 5.3 VAC (AA6-2 to AA6-5)
AA2-5 Purple 24 VDC Reversing Relay AA6-3 -- 22.5 VAC (AA6-3 to AA6-6)
AA2-6 -- -- AA6-4 -- -­AA2-7 -- -- AA6-5 -- 5.3 VAC (AA6-5 to AA6-2)
AA2-8 -- -- AA6-6 -- 22.5 VAC (AA6-6 to AA6-3)
AA2-9 -- -- --
AA2-10 Pink Power for off board relay
AA7-1 -- --

AA3-1 -- Available 2 AA7-3 Orange Hot Water Valve Coil
AA3-2 -- Available 1 AA7-4 Brown #15 Pressure Switch

AA3-3 -- Enable 1 AA7-5 Red 120 Neutral
AA3-4 -- Enable 2 AA7-6 Black Motor Sense
AA3-5 -- Debit Power AA7-7 Purple 24 VDC Motor Relay1
AA3-6 -- Debit Ground AA7-8 Blue Cold Water Valve Coil

AA4-1 Blue Anode coin #1 L.E.D. EE1-1
AA4-2 Red Collector Photo transistor EE1-2
AA4-3 White Emitter Photo transistor EE1-3 -­AA4-4 White/Blue Cathode L.E.D. EE1-4

Wire Color Description Connector-

Service and Vault Switch

Relays

Debit Card Connections

Coin Sensor #1 Battery

AA4 AA7AA6 AA3

Pin

AA7-2 Grey #20 120 Line/ Lid Switch

Wire Color Description

Coin Sensor #2

Board Power Source

Power and Main Components

+

--

−

Positive Side

Negative Side

December 2003 16022846 Rev 0

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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 DISPLAY EXPLANATION

607 6 REGULAR CYCLE PRICE

07 Represents the number of coins. See value of Coin 1 and Coin 2. Adjustable from 0-39 coins by

710 7 WASH & AGITATION CYCLE

10 This is the number of minutes for Wash. Adjustable from 8-15 minutes by pressing the Permanent

811 8 RINSE CYCLES

Represents the length and number of rinses (except “woolens” and “delicates”). The middle digit

900 9 CYCLE COUNTER OPTION
00 “OFF."

OC ON." Press Delicates & Knits keypad three consecutive times to select "OC" and three

1.00 1. MONEY COUNTER OPTION
00 “OFF”

2.00 2. SPECIAL PRICING OPTION.
00 "OFF."

3.07 3. SPECIAL CYCLE PRICE

5.00 5. MINUTES

6.00 6. HOUR

7.00 7. SPECIAL PRICING STARTING HOUR

0C “ON”. Press Delicates & Knits keypad three consecutive times to select "OC". Counter resets by

C0 To select “On” and not turn off. First select “ON”, then within two seconds press Delicates & Knits

SP "ON." Press Delicates & Knits keypad once to select "SP."

07 Represents the number of coins. Adjustable from 0 - 99 by pressing the Permanent Press

00 This is the selection "MINUTES" of the time of day clock. Adjustable from 0 to 59 by pressing the

00 This is the selection "HOUR" of the time of day clock using military time (24 hour clock).

00 This is the selection of the hour using military time (24 hour clock) that the Special Pricing will

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.

Press keypad.
Press Woolens keypad once to advance to next code.

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.

consecutive times to turn “OFF” ("00"). Reset counter by going from "OC" to "00."
Press Woolens keypad once to advance to next code.

going from “OFF” to “ON”.

twice, Permanent Press Once, and exit the setup mode.

Steps "3." thru "9." codes are skipped if mode "2.00" is selected.
Press Woolens keypad once to advance to next code.

keypad.
Press Woolens keypad once to advance to next code.

Permanent Press keypad.
Press Woolens keypad once to advance to next code.

Adjustable from 0 to 23 by pressing the Permanent Press keypad.
Press Woolens keypad once to advance to next code.

"begin “. Adjustable from 0 to 23 by pressing the Permanent Press keypad.
Press Woolens keypad once to advance to next code.

16022846 Rev 0 December 2003

6

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 DISPLAY EXPLANATION

8.00 8. SPECIAL PRICING STOPPING HOUR
00 This is the selection of the hour using military time (24 hour clock) that the Special Pricing will "stop."

9.10 9. SPECIAL PRICE DAYS

10

A.00 A. VAULT VIEWING
00 "OFF."

SC

b.05 b. VALUE OF COIN 1 (QUARTER DROP)

05

C.20 C. VALUE OF COIN 2 (DOLLAR DROP)

20

d.00 d. COIN SLIDE OPTION
00 "OFF"

E.00 E. ADD COINS OPTION

F.00 F. ENHANCED PRICING OPTION
00 “OFF”
CP Cycle Based Pricing-- Allows configuration of different prices for cold, warm and hot water cycles.

H.01 H. SUPER CYCLE UPGRADE PRICE (Skipped unless super cycle pricing is selected “F.Su”.)

01

CS

00
AC

Su

Adjustable from 0 to 23 by pressing the Permanent Press keypad.
Press Woolens keypad once to advance to next code.

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.

"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

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.

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.

"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.

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.

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.

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.

December 2003 16022846 Rev 0

7

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 DISPLAY EXPLANATION

h.01 h. 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:

J.Cd J. COIN/DEBIT OPTION

Ed

L.00 L. PRICE SUPRESSION OPTION

00 “OFF”

n.CE n. CLEAR ESCROW OPTION

00 “OFF”

U.00 U. PENNY INCREMENT OFFSET

00

01

Cd
C_
_d

PS

CE

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.

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.

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”.

“ON”
Press Woolens keypad once to advance to the next code.

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”.

“ON”
Press Woolens keypad once to advance to the next code.

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.

16022846 Rev 0 December 2003

8

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.

With entire display blinking on
and off, if any segments of the
entire display are not working,

replace the control board.

Does cold water run when "C"

is in the display?

Does hot water run when "C" is

in the display?

No

Yes

Enter operator mode using service

switch. Push the delicates and
knits program keypad for more

than one second.

Push the woolens program

keypad to start the diagnostic

program.

Yes

Push the woolens program keypad

to stop / start the diagnostics in the

current phase.

The hoses may be crossed or

the water valve miswired.

Does "C" appear in the

display?

Does "A" appear in the

display?

Water level looks full; Go

to "A".

No

Yes

No

If washer will not fill, agitate or

spin, unplug washer and check for

continuity of lid switch.

Does hot water run when "H" is in

the display?

Check wiring and terminations

between water valves, pressure

switch and control board.

Yes

Warm water runs when "Ch" is in

the display.

No

Does switch check closed with

lid closed?

Push the woolens program keypad

to stop / start the diagnostics in

the current phase.

Does 115VAC appear between the

brown and red wires on connector

Yes

AA7?

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

Yes

Adjust lid switch or replace

switch if necessary.

Check water shutoff valves,

filter screens and hose routing.

No

Replace pressure switch or

No

Replace control boardReplace water valve.

hose.

Yes

December 2003 16022846 Rev 0

9

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"

Does 25 VDC appear across the

reversing relay?

Yes

Replace reversing relay.

is in the display?

No

No

Yes

Push the woolens program keypad

to stop the diagnostics in the

current phase.

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

motor relay coil?

Does washer spin when "A" is

No

Replace control board.

in the display?

No

Replace control board. Replace motor relay.

Does washer spin when "S" is

in the display?

No

Push the woolens program keypad

to stop / start the diagnostics in the

current phase.

Yes

Does 25 VDC appear across the

Washer checks ok.

reversing relay coil?

Yes

Check wiring and terminations

between the control board and spin

relay. Make sure motor is not bad

or tripped out on thermal protector.

No

Yes

Replace reversing relay.

No

If desired push the delicates and

knits program key pad to cancel

the diagnostic program any time.

Exit operator mode using

service switch.

Replace control board.

16022846 Rev 0 December 2003

10

Component Testing Procedures

!

To avoid risk of electrical shock, personal injury or death; disconnect power to washer before servicing, unless
testing requires power.

WARNING

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. The help modes are followed by the Energy
Saving indication screen (displayed as hE.ES), the software version, and finally the water temperature sensing
(displayed as Exxx). Press the Permanent Press keypad at anytime to exit help mode.

The Energy Savings indication screen (hE.ES) and temperature sensing screen (Exxx) will only be displayed if the
water is configured for energy saving operation. The water temperature sensing screen(displayed as Exxx) is not a

measure of water temperature in °F, but higher numbers do correspond to higher temperature water.

Display Symbol Inputs and Output Function

WASH Water sensed at wash level
* Low voltage present (approx 90 VAC)
Circle above digit Lid closed
OR Motor sensed running
COLD Cold water relay on
HOT Hot water relay on
DETERGENT Motor relay on
SPIN Spin(reversing) relay on
AVAILABLE Energy savings strap present

WASHER HELP CODES

Code Problem Description

20 Filling too quickly during cycle Pressure switch opens sooner then expected
21 Losing water during cycle (siphoning) Added more water during agitation

DIAGNOSTIC CODES

Diagnostic Codes

d1 Water level circuit failure on control board
d3 Water temperature sense error
d4 Lid switch circuit failure on control board
d5 Blocked coin 1 or coin drop control circuit failure
d7 Slow fill detected; fill time greater than 7 minutes
d8 Slow drain detected; drain time greater than 2 minutes

d9 Low voltage detected; less than 90 volts AC
d12 Motor sensor circuit failure on control board
d13 Blocked coin 2 or coin drop control circuit failure
d16 Control board not receiving communication from debit card reader

Description

December 2003 16022846 Rev 0

11

Component Testing Procedures

!

WARNING

To avoid risk of electrical shock, personal injury or death; disconnect power to washer before servicing, unless
testing requires power.

Try to clear diagnostic

d1

d3

d4

d5

d7

code by pushing delicate
and knits keypad for one

second.

Check wiriing and

terminations on water

valve thermistor.

Try to clear diagnostic
code by pushing delicate
and knits keypad for one

second.

Check wiring and

terminations between

first coin drop and

control board.

Check for plugged

screen on fill hoses

Did diagnostic code

cancel?

Did diagnostic code

cancel?

Check for object blocking

first coin drop optic

sensor. Then check

transformer for loss of 24

volt circuit.

This diagnostic code will appear routinely

if washer fills slowly and may be ignored if

the water pressure is very low

Yes

No

Yes

No

False diagnostic indication.

Control board is ok.

Replace control board.

False diagnostic indication.

Control board is ok.

Replace control board.

Replace first coin drop

optic sensor if it still

appears in display.

d8

d12

d9

d13

d16

Check drain hose for

being plugged or kinked

This diagnostic code indicates a

low voltage condition has occurred.

check installation to insure proper

power to washer.

Try to clear diagnostic code by
pushing delicate and knits keypad

for one second.

Check wiring and terminations

between second coin drop and

control board.

Is card reader

installed?

No

Install reader or use PDA to change mode

out of Gen 2 debit mode.

Check wiring between debit card

reader and control board.

Check pump belt for

proper tension

Did failure code cancel?

Check for object blocking

second coin drop optic

sensor.

False failure indication

control board is ok.

Yes

No

Yes

Power down and

up machine to

reset card

reader.

This failure code will

appear routinely if

washer drains slowly.

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.

Replace second coin drop

optic sensor if F13 still

appears in display.

Replace card

reader or control

board.

16022846 Rev 0 December 2003

12

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

Enter operator mode
using service switch.

Does display contain a

diagnostic code?

Is voltage correct on

secondary side of the

transformer?

Yes

Yes

No

Does 115 VAC

appear across the

primary of the

transformer?

Enter diagnostic

code trouble

shooting guide

Display is

Blank

Make sure washer

is plugged in to

live power source

No

Unplug washer and check

wiring and termination

between transformer, service

switch and control board

Initiate the manual

reset sequence

Abnormal
display or

function

Initiate the manual

reset sequence

If problem still
exists replace

control board

Clean lint off of

control board
display wires.

No

Check wiring to

transformer and

power at outlet

Replace the transformer.

Inspect control board for
burned components and

replace it if damaged.

Shorted diodes will

damage new transformer.

If problem still
exists replace

control board

Yes

December 2003 16022846 Rev 0

13

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

Lift washer lid. Did

display change?

Yes

The washer lid must be
opened after a program
ends before the washer

will operate again

display

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?

Yes

Check wiring and

termination between lid

switch and control board

Plug in washer. If

problem still exists

replace control

board

Control does not

respond to

program key

inputs

No

Adjust lid switch or

replace it if

necessary

Does display show

"select cycle"?

No

Put proper number

of coins into coin

drop

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

If problem still

exist replace

control board

16022846 Rev 0 December 2003

14

Component Testing Procedures

!

WARNING

To avoid risk of electrical shock, personal injury or death; disconnect power to washer before servicing, unless
testing requires power.

Check optic

window for

obstructions, dirt,

or scratches.

If problem still
exists replace

control board

Is coin slide option

selected?

Timings for the coin

slide mode will cause

coins to not be

recognized. Deselect

the coin slide mode.

Will not respond

to handheld PDA

No response to

coin 1

Does PDA

respond to other

machines?

No

PDA has failed.

Is display blank?

Yes No

Yes

No Yes

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.

If problem still

exists replace first

coin optic sensor

No

Check the coin
mechanism for

proper adjustment.

Check wiring and

termination between first

coin drop and control

board

Unplug washer and check

resistance between the

red wire and the white

wire in connector

AA4. Is resistance

greater than 10K ohms?

Yes

Reconnect

connector and

plug in washer

If problem still

exist replace

control board

December 2003 16022846 Rev 0

15

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?

Yes

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

No

Check the coin
mechanism for

proper adjustment.

Check wiring and

termination between

second coin drop and

control board

Unplug washer and check

resistance between the

red wire and the white

wire in connector

AA4. Is resistance

greater than 10K ohms?

Yes

Reconnect
connector and
plug in washer

Will not keep

during power

interruptions

time of day

If problem still
exists replace

second coin optic

sensor

Is a battery

installed?

No

A battery must be
installed in order to keep
time of day during power

interruptions.

Yes

Does greater than 3.4 VDC

appear between the red and

black wires of the battery?

Yes

Check battery

connector and

terminations

If problem still

exists replace

control board

No

If problem still

exist replace

control board

Replace battery

16022846 Rev 0 December 2003

16

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

Cannot enter or

cannot exit operator

mode

Unplug washer check

wiring and terminations

between lid switch and

control board

Adjust lid switch or

replace it if

necessary

Check for proper

adjustment of service

switch

Check continuity of

lid switch as lid is

raised and lowered

Does switch open

and close

properly?

Check wiring and

terminations between

service switch and control

board

Plug in washer

YesNo

replace control board

if problem still exists

Operator options
revert to defaults

Replace control

board

Setup operator options as
desired unplug washer for

2 minutes then plug in

washer

Yes

Does service switch

open and close

properly?

If problem still exists

replace control board

No

Replace service

switch

December 2003 16022846 Rev 0

17

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

Water runs

without program

selected

Check for proper

adjustment of

vault switch

Replace control

board

Unplug washer.
Does water still

run?

No

Check wiring and

terminations between

vault switch and control

board

Does vault switch

open and close

properly?

Check wiring and

terminations between

control board and water

valve

NoYes

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

Replace vault

switch

If problem still
exists replace

control board

No hot water or

cold water

Spin instead of

agitating

No spin or

agitate

Yes

Replace water

valve

Run washer

diagnostics

program

Run washer

diagnostics

program

Run washer

diagnostics

program

16022846 Rev 0 December 2003

18

Wiring Diagram

46513

2

(-)

342

1

(+)

OVERLOAD

PROTECTOR

(SEE CIRCUIT BOARD)

(SEE CIRCUIT BOARD)

EXTERNAL DEBIT CARD

WATER LEVEL

MOTOR RELAY

25A3614

3

15 BR

GY 20

GY 20

GY 20

5.3VAC

LID

RDRDRDBKBKBKGYBKPU/WH

PU/WH

15 BR

GND

t°

YLYLYLYLYLYLYLGYGY

!

WARNING

To avoid risk of electrical shock, personal injury or death; disconnect power to washer before servicing, unless
testing requires power.

MAT12PDSA* SCHEMATIC

BATTERY

OPTIONAL

DEBIT POWER

A1

E2

E1

COMMON

A2

CONNECTOR EE1

SWITCH

FULL

RL-9

L1
N

LINE

CONNECTOR

RD

WH

TRANS-

FORMER

22.5
VAC

RD

WH

SWITCH

RD

RL-9

OFF BOARD

DEBIT GROUND

CONNECTOR AA3

(OPTIONAL)

20

PU/WH

CONNECTOR AA6

COIN SENSOR # 1

CONNECTOR AA4

VAULT

SERVICE
SWITCH

SWITCH

3 2 1

CONNECTOR AA1

REVERSING RELAY

CONTACT

2WH1

WH

4RD5

RD

7

8

BR-RD

YL

A

PU

- INSULATED TERMINAL

COIN SENSOR # 2

(OPTIONAL)

CONNECTOR AA5

REVERSING

RELAY

RD

6

WH

9

BU

B

PK

BR

8 B 9 7

WH WH

CONNECTOR AA2

CENT

SW

WH

START

WH

RUN

WATER

VALVE

RD

DRIVE

MOTOR

HOT

OR

OR

CONNECTOR AA7

COLD

BU

BU

RD

December 2003 16022846 Rev 0

19

Wiring Diagram

46513

2

D

OVERLOAD

PROTECTOR

(SEE CIRCUIT BOARD)

(SEE CIRCUIT BOARD)

WATER LEVEL

MOTOR RELAY

25A3614

15 BR

GY 20

GY 20

GY 20

5.3VAC

LID

RDRDRDBKBKBKGYBKPU/WH

PU/WH

PU/WH

15 BR

t°

GYGYYLYLYLYLYL

YL

LINE

!

WARNING

To avoid risk of electrical shock, personal injury or death; disconnect power to washer before servicing, unless
testing requires power.

MAT12PRSA* SCHEMATIC

L1
N

CONNECTOR

WH

22.5
VAC

RD

SWITCH

EXTERNAL DEBIT CARD

20

RD

RL-9

OFF BOARD

RD

DEBIT POWER

A1

DEBIT GROUN

A2

E2

E1

CONNECTOR AA3

(OPTIONAL)

RL-9

COMMON

SWITCH

FULL

CONNECTOR AA6

(SEE CIRCUIT BOARD)

BATTERY

OPTIONAL

(-)

(+)

342 1

CONNECTOR EE1

3

2 1

CONNECTOR AA1

REVERSING

RELAY

REVERSING RELAY

CONTACT

2L21

WH

4RD5

8

7

BR-RD

YL

A

PU

- INSULATED TERMINAL

TRANS-

FORMER

3

RD

6

WH

9

BU

B

PK

BR

8 B 9 7

WH WH

CONNECTOR AA2

CENT

SW

START

WH

WH

GND

RUN

WATER

VALVE

RD

DRIVE

MOTOR

HOT

OR

OR

CONNECTOR AA7

COLD

BU

BU

RD

16022846 Rev 0 December 2003

20