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H. ROTATIONAL SENSOR ASSEMBLY
The rotational sensor is a self-contained, motion detector proximity sensor, designed to detect a predetermined
stopped drum (basket/tumbler) condition. The rotational sensor is used as a safety device, once the drum has
stopped rotating for more than 12-seconds. After this 12-second interval has been reached, the sensor goes into
an open state, removing power to PLC (Programmable Logic Controller) input #10. This interruption of power to
input #10 signals the PLC that there is a tumbler (basket) fault. This turns control relay #6 (CR6) off, which
opens the heat circuit. When the rotational sensor is active (closed) the indicator on the sensor is on. The
rotational sensor drops approximately 4 VAC when the dryer is active. When the rotational sensor is off, the is
an approximate 120 VAC voltage drop.
WARNING: UNDER NO CIRCUMSTANCES SHOULD THE OUTPUT OF THE
ROTATIONAL SENSOR BE GROUNDED. DAMAGE WILL RESULT. A
CURRENT LIMITING DEVICE IS REQUIRED.
1. Rotational Sensor
a. Rotational Sensor Replacement
1) Discontinue electrical service to the dryer.
2) Remove the tumbler (basket) section bottom left hand panel.
a) Remove the four (4) 5/16-18 x 2-1/4" bolts.
b) Remove the panel.
3) Remove the left tilt guard.
a) Remove the six (6)
5/16-18 x 3/4" tap
bolts.
b) Remove the guard.
4) Remove the cover from the tumbler
(basket) junction box.
5) Remove the two (2) wires that go to the
rotational sensor from the tumbler (basket)
junction box.
6) Remove the adjustment/mounting nut.
7) Cut tie wraps holding cable.
8) Remove rotational sensor.
9) To install new rotational sensor, reverse Step #8 thru Step #4.
10) Reestablish electrical service to the dryer.
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