Accelerometer - GE WPRB9250 Technical Service Manual

board.
To test the speed sensor:
1. Place the unit in service mode and index to the
Spin Fast Test.
2. Press the START pad and monitor the DSSD.
An rpm displayed on the DSSD indicates an operating
speed sensor. No rpm displayed on the DSSD
indicates a faulty speed sensor or faulty wiring.
When replacing the transmission, the speed sensor
and magnets must be transferred to the replacement
transmission.
To remove the speed sensor:
1. Disconnect power to the unit and rotate the
transmission by turning the belt to allow access to
the speed sensor.
2. Remove the 7/16-in. speed nut fastening the
sensor to the brake assembly.
3. Remove 1 T-10 torx screw fastening the magnets
to the transmission and remove the magnets.

Accelerometer

The accelerometer is located at the front, bottom
center of the outer tub. The accelerometer monitors
the unit for radial and vertical acceleration and
transmits this information to the electronic control
board. The electronic control board uses this
information to monitor and control the spin basket for
an out-of-balance condition during spin. If an out-of-
balance condition is detected, the electronic control
board will reduce the spin rpm. If, after lowering the
speed, an out-of-balance condition is still detected, the
control will again lower the spin rpm. The control will
lower the spin rpm at the following intervals:
850, 700, 630, 550, 450, 350, 150. Should an
excessive out-of-balance condition occur, such as one
caused by a broken suspension rod, the unit will step
down to 130 rpm, then terminate spin; however, the
cycle will continue without spin until completed.
Should the accelerometer fail, the electronic control
board will limit spin speed to a maximum of 630 rpm
and a spin speed error code will be logged.
To test the accelerometer:
1. Place the unit in service mode.
2. Index to the accelerometer test.
3. Shake the spin basket back and forth by hand
while monitoring the DSSD. If the display
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