Troubleshooting Procedures

!WARNING

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

Diag.

Description

Trigger

Action to be

Code

 

 

taken

 

 

Tach signal

 

 

 

exists without

 

 

Motor tach

torque

Displays " bE".

 

signal exists

command or

25

without

when not

Replace Machine

 

motor

expected

Control Board.

 

running.

(Abnormal

 

 

 

condition

 

 

 

only).

 

26-28

 

Not Used

 

 

 

 

 

Sump

Abnormal

Displays " tE".

 

high/low temp

- Loose or pinched

 

thermistor

29

or ohm

wires

failure

 

resistance

- Bad sump

 

(Optional)

 

seen

thermistor

 

 

30-33

 

Not Used

 

 

 

 

 

 

Machine

Display “E3

 

 

control is

Evaluate wire

 

 

attempting to

harness for loose or

 

Motor Drive

drive the

unhooked

 

motor but is

connections. If

 

failure

2E

not seeing

machine has

(Locked, Hall

 

any tach

separate motor

 

sensor fault)

 

response.

control, perform self

 

 

 

 

Visual check

diagnostic motor

 

 

shows motor

test. See “Board

 

 

is not moving.

Output Test

 

 

Machine

Display "Sr".

 

System

control does

34

not see relay

Replace machine

Relay failure

 

 

open when it

control board.

 

 

should.

 

35

 

Not Used

 

 

 

 

Diag.

Description

Trigger

 

Action to be

Code

 

 

 

taken

36

Heater relay

Heater Relay

 

Display "Hr".

failure.

Check signal

 

Replace Machine

 

not sensed.

 

Control Board.

 

 

 

 

 

 

 

Displays

 

Motor failure

Over Current

 

"3E".Check the

3E

(Over

is detected.

 

motor windings, the

Motor won't

 

speed sensor,

 

current)

 

 

turn.

 

wiring connections,

 

 

 

 

 

 

 

or Control Board.

40-49

 

Not Used

 

 

 

 

 

 

Voltage for

Voltage for

 

Display

 

motor control

 

91

motor control

 

"2E".Replace

bus is over

bus is over

 

Machine Control

 

specified

 

 

limit

 

Board.

 

limit

 

 

 

 

 

 

Voltage for

Voltage for

 

Display

92

motor control

motor control

 

"2E".Replace

specified

bus is under

 

Machine Control

 

 

 

limit

specified limit

 

Board.

Exit Service Mode

To exit:

1)Press Chime and Extra Rinse keys for 3seconds again, or

2)Press Off, or

3)Unplug the machine. After five (5) minutes of inactivity (user key presses) in Service Mode, the machine will exit the Service Mode and resume normal operations. Pressing the Off key will completely exit Service Mode. If a cycle is running, cancel the cycle. Pressing the Rotary Selector knob while running a test will pause the individual test, while remaining in Service Mode. A power loss during Service Mode will cancel this mode.

20

16025909 Rev. 0

©2005 Maytag Services

Page 20
Image 20
Maytag MAH9700AW* manual Output Test, Diag Description Trigger Action to be Code, Exit Service Mode