Maytag MED5920TW0 Parts Diagram

TECH SHEET - DO NOT DISCARD PAGE 1

WARNING

Electrical Shock Hazard

Disconnect power before
servicing.

Replace all parts and
panels before operating.

Failure to do so can result
in death or
electrical shock.

IMPORTANT

Electrostatic Discharge (ESD)

Sensitive Electronics

Do not open package until it is time to
install the electronic board.

ESD problems are present everywhere.
ESD may damage or weaken the
electronic board. The new board may
appear to work well after repair is
finished, but failure may occur at a later
date due to ESD stress.

Use an anti-static wrist strap. Connect

■

wrist strap to green ground connection
point or unpainted metal in the
appliance

Touch your finger repeatedly to a green
ground connection point or unpainted
metal in the appliance.

■

Before removing the part from its
package, touch the anti-static bag to a
green ground connection point or
unpainted metal in the appliance.

■

Avoid touching electronic parts or
terminal contacts; handle electronic
board by edges only.

■

When repackaging failed electronic
board in anti-static bag, observe above
instructions.

-OR-

DIAGNOSTIC GUIDE

Before servicing, check the following:

Make sure there is power at the wall

■

outlet.

Has a household fuse blown or circuit

■

breaker tripped? Time delay fuse?

Is dryer vent properly installed and

■

clear of lint or obstructions?

All tests/checks should be made with

■

a VOM (volt-ohm-milliammeter) or
DVM (digital-voltmeter) having a
sensitivity of 20,000 Ω per volt DC or
greater.

Check all connections before

■

replacing components. Look for
broken or loose wires, failed terminals,
or wires not pressed into connectors
far enough.

A potential cause of a control not

■

functioning is corrosion on
connections. Observe connections
and check for continuity with an
ohmmeter.

Connectors: Look at top of connector.

■

Check for broken or loose wires.
Check for wires not pressed into
connector far enough to engage metal
barbs.

Resistance checks must be made with

■

dryer unplugged or power
disconnected.

LESS DRY TEST

Begin with a fully assembled, empty dryer
with clean lint screen. Be sure dryer is
connected to a known good power source.

1. Set the following configuration:

■

Door - must be closed

■

Timer - Less Dry

■

Temperature switch - High

■

End of Cycle Signal switch - On

2. Press the Push to Start (PTS) switch.
After approximately 16 seconds, the
Timer will start to advance to the Off
position. If this function does not occur,
proceed to the Diagnostic Test.

DIAGNOSTIC TEST

This diagnostic test allows factory/service
personnel to test and verify all inputs to the
electronic control. The basic operation of this
test is to notify the operator with an audible
beep every time the status of an input to the
control changes state.

This test is performed with a fully assembled
dryer, connected to a known good power
source.

Activating the Test Mode

1. Set the following configuration:

Door - must be open

■

Temperature switch - Air Fluff

■

End of Cycle Signal switch - On

■

Timer - Timed Drying or Sensor Drying

■

selection

2. Turn the Wrinkle Prevent switch from Off
to On three times within a five second
period. A single beep, a pause, then a
single beep will sound to indicate that the
test mode is activated.

NOTE: If any of these initial conditions are
not satisfied, the control will not enter the
test mode.

Test Mode Functionality

When the control is in test mode, every input
change of state will result in an audible beep
(with the exception of the End of Cycle Signal
switch). This includes:

■

Door switch

■

Moisture Sensor (short/open Sensor
will result in a beep)

NOTE: A moistened finger or damp
cloth may also be used.

■

Temperature switch

■

Wrinkle Prevent switch

■

Push to Start (PTS) switch (with the
door switch closed)

■

Timer (any cam input change will result
in a beep)

NOTE: Timer will advance during test.

If any of the inputs do not result in a beep,
proceed to the corresponding component
tests, beginning on page 4.

FOR SERVICE TECHNICIAN’S USE ONLY PART NO. W10114943A

PAGE 2 TECH SHEET - DO NOT DISCARD

Electric Dryer Wiring Diagram

L1 LINE – BK – LINE L2R

BK

R

BK

R

TCO

310°F

(154°C)

R-W

R-W

PTS

TIMER

BU

BU

COM

BK

BU

NO

COM

BU

BK

BU

BK

HEATER

MOTOR

RELAY

BR

BK

RELAY

NO

BU-BK

DRUM LAMP

BU

V

R

W

PK-BK

DL

ELECTRONIC CONTROL

PT-1

TIMER

P1-1

MTR

P1-2

T2

P1-3

T3

P1-4

T4

P3-1

48 VDC

R-W

HEATER HI

R-W

HEATER

P3-2

LOW

48 VDC

P2-7

MOTOR
START

PK-BK

P1-5

START
SENSE

120 VAC RLY DR.

DOOR

MOIST

GND

MOIST.

TEMP.

MODEL

NEUTRAL

WPREVENT

FS-1

FS-2

FS-3

LOUD

MODEL
MODEL

L1-RTN

P2-6

P2-5

P2-4

P2-3

P2-1

P3-8

P3-7

P3-6

P3-5

P3-4

P4-4
P4-3
P4-2
P4-1

OR

G-Y

Y-R

R

W

GY

1

T

3

V

2

OR

1

1

T-W

HEATER RELAY

WRINKLE
PREVENT

SENSOR

FABRIC

SIGNAL

AC COIL

240 VOLTS
120 VOLTS

4

5

4

4

G-Y

THERMISTOR

10 kΩ

BR

BR

W– NEUTRAL

MAIN

2.4–3.6
START

2.4–3.8

1/3 H.P.

BU

W

5400 WATT
2700 WATT

EACH LEG

DOOR
SWITCH

5M

3M

CENTRIFUGAL SWITCH

6M

BU

W-R

W

BU

THERMAL FUSE

196 °F (91°C)

BU

DRIVE MOTOR

R-W

BR

NEUTRAL
TERMINAL

W

LINKED TO
CABINET

W

HIGH LIMIT

THERMOSTAT

180°F (82°C)

W

R

2M

1M

R

NC

7

4

PS02

1

8

PS03

5

1

14

Electronic Control Assembly

Contacts

Function

1M 2M 3M 5M 6M

Start

Run

=

Contacts closed

Centrifugal Switch (Motor)

Blue

Pink­Black

PT-1

Pink­Black

Blue

Motor Relay

Red-White

Drum Size:

7 cubic feet

Blue White

Black

Red

Drum Speed:

48 ± 3 RPM CW

Start Winding

Main Winding

Violet

Green-

Yellow

Red

Red-

White

1

Red-

White

Pluggable Drive Motor Switch

PS01

5

PS04

D.C. Heater Relay

Brown

Brown

A.C. Heater Relay

Red-White

Brown

Brown

Timer

Wire Colors

PT-1

BU BK R V W

Blue Black Red Violet White

R

W

U

K

V

DATE

B

B

Timer

PART NO. W10114943A FOR SERVICE TECHNICIAN’S USE ONLY

TECH SHEET - DO NOT DISCARD PAGE 3

MOTOR STRIP CIRCUIT

L1 LINE – BK

TIMER

BK

BU

MOTOR

RELAY

BU-BK

PK-BK

NO

BU

BU

PTS

BK

BU

BU

BK

BU

COM

BK

HEATER STRIP CIRCUIT

L1 LINE – BK

THERMAL

CUT-OFF

(TCO)

310 °F (154°C)

R-W

COM

HEATER

RELAY

NO

BR

ELECTRONIC CONTROL

PT-1

P1-1

P3-2

P2-7

PK-BK

P1-5

TIMER

MTR

HEATER
LOW

MOTOR
START

START
SENSE

DOOR

ELECTRONIC CONTROL

NEUTRAL

48 VDC
HEATER
HI

HEATER
LO W

120 VAC

RLY DR

L1-RTN

HEATER RELAY

R-W

R-W

P3-1

P3-2

TEMP.

AC COIL

P2-6

P2-3

P2-1

P4-1

P4-2

W

R – LINE L2

NEUTRAL
TERMINAL
LINKED TO
CABINET

W

2M

1M

240 VOLTS

120 VOLTS

BU

THERMAL FUSE

196 °F (91°C)

W – NEUTRAL

BU

BU

2.4–3.8

DRIVE MOTOR

MAIN

2.4–3.6

START

1/3 H.P.

BU

DOOR
SWITCH

W

5M

CENTRIFUGAL SWITCH

6M

3M

R – LINE L2

240 VOLTS

120 VOLTS

THERMISTOR

R

W

BR

BR

10 kΩ

W-R

R-W

BR

W – NEUTRAL

5400 WATT
2700 WATT

EACH LEG

5M

3M

HIGH LIMIT

THERMOSTAT

180°F (82°C)

CENTRIFUGAL SWITCH

6M

NC

NEUTRAL
TERMINAL
LINKED TO
CABINET

R

2M

1M

MOISTURE SENSOR STRIP CIRCUIT

L1 LINE – BK

120 VOLTS

TIMER

BK

BU

ELECTRONIC CONTROL

BK

PT-1

BU

P1-1

TIMER

MTR

MOIST

GND

MOIST.

NEUTRAL

P2-5

P2-4

P2-1

G-Y

SENSOR

Y-R

G-Y

W

W – NEUTRAL

FOR SERVICE TECHNICIAN’S USE ONLY PART NO. W10114943A

NEUTRAL
TERMINAL
LINKED TO
CABINET