Maytag MAH9700AW* - Manual (Page 20)

Troubleshooting Procedures
! WARNING
To avoid risk of electrical shock, personal injury or death, disconnect power to unit before servicing, unless testing
requires power.
20 16025909 Rev. 0 ©2005 Maytag Services
Diag.
Code
Description Trigger Action to be
taken
25
Motor tach
signal exists
without
motor
running.
Tach signal
exists without
torque
command or
when not
expected
(Abnormal
condition
only).
Displays " bE".
Replace Machine
Control Board.
26-28 Not Used
29
Sump
thermistor
failure
(Optional)
Abnormal
high/low temp
or ohm
resistance
seen
Displays " tE".
- Loose or pinched
wires
- Bad sump
thermistor
30-33 Not Used
2E
Motor Drive
failure
(Locked, Hall
sensor fault)
Machine
control is
attempting to
drive the
motor but is
not seeing
any tach
response.
Visual check
shows motor
is not moving.
Display “E3”
Evaluate wire
harness for loose or
unhooked
connections. If
machine has
separate motor
control, perform self
diagnostic motor
test. See “Board
Output Test”
34
System
Relay failure
Machine
control does
not see relay
open when it
should.
Display "Sr".
Replace machine
control board.
35 Not Used
Diag.
Code
Description Trigger Action to be
taken
36
Heater relay
failure.
Heater Relay
Check signal
not sensed.
Display "Hr".
Replace Machine
Control Board.
3E
Motor failure
(Over
current)
Over Current
is detected.
Motor won't
turn.
Displays
"3E".Check the
motor windings, the
speed sensor,
wiring connections,
or Control Board.
40-49 Not Used
91
Voltage for
motor control
bus is over
specified
limit
Voltage for
motor control
bus is over
limit
Display
"2E".Replace
Machine Control
Board.
92
Voltage for
motor control
specified
limit
Voltage for
motor control
bus is under
specified limit
Display
"2E".Replace
Machine Control
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.