Tub Displacement Switch; Strut Displacement Switch - Maytag Neptune MAH3000 Service Manual

Whenever a displacement switch is tripped,
t h e m a c h i n e s t o p s a n d r e d i s t r i b u t e s t h e
clothes load. This involves a three (3) second
pause, followed by a
tumble (47-49 rpm) to redistribute the clothes
load. The washer will pause again for three
(3) seconds, then start the distribution profile
again. To redistribute the load, the machine
tumbles the load (50-90 rpm) and again at-
tempts to pass through critical (about 150
rpm). The machine will try to redistribute
twice as the washer attempts to spin at 800
r p m .
Once the load is properly redistributed and
the speed reaches above 500 rpm, the inertial
switch and cabinet vibration sensor are used.
If the inertial switch or sensor is activated, the
washer will drop in spin speed.
upon the speed at which switch activation
takes place. See Figure 2-12
speed categories and the corresponding
duced speeds. If the switches are not acti-
vated, the final spin speed will reach a maxi-
mum of 850 rpm and then drop to find the
o p t i m u m p e r f o r m a n c e l e v e l , b a s e d u p o n
readings taken by the cabinet vibration sen-
sor. Consumers may be confused by the up-
and-down cycling of the motor.
machine is searching for the optimal speed
p e r f o r m a n c e .
R P M F U N C T I O N
4 7 ...........................T u m b l e
47-85 .......................Distribution
90-250 .....................Accelerate Through
Critical
250-499 ..................Accelerate Through
Critical
500-575 ..................High Speed Acceleration
600-675 ..................High Speed Acceleration
> 6 7 5 .......................High Speed Acceleration
750-800 ............. TOP SPIN SPEED
Figure 2-12
1 6 0 0 8 3 7 3 - 0 1
five (5) second reverse
This is based
outlining the spin
re-
However, the
- WILL DROP TO 450 RPM
- WILL DROP TO 555 RPM
- WILL DROP TO 650 RPM
© 1998 Maytag Corporation

Tub Displacement Switch

The tub displacement switch is located on the
upper right hand side of the outer tub, below
the top concrete weight, between the outer
tub and the cabinet.
outer tub touching the cabinet side as the
machine passes through critical.
switch is tripped, the machine stops and re-
distributes the load.
Testing the Tub Displacement Switch:
1 . Disconnect power to the unit.
2 . Place ohm meter leads across the two ter-
minals of the switch.
on the switch. If the contacts open, the
switch is good. If not, replace the switch.

Strut Displacement Switch

The strut displacement switch is clipped to the
top of the left rear strut.
the outer tub bottoming out on the strut as
the machine accelerates above 90 rpm.
is caused by the twisting motion of the outer
tub. This additional switch is required because
the twisting motion may not trip the outer tub
displacement switch.
activation would be an unbalance at the front
and rear of the spinner on opposite sides.
The strut displacement switch is wired in se-
ries with the tub displacement switch and
causes the same type of redistribution.
Testing the Strut Displacement Switch:
1 . Disconnect power to the unit.
2 . Place ohm meter leads across the two ter-
minals of the switch.
on the switch. If the contacts close, the
switch is good. If not, replace the switch.
SECTION 2. ELECTRICAL COMPONENTS & TESTING
The switch senses the
When this
Depress the button
The switch senses
This
The primary cause for
Depress the button
2 - 1 2