GE Spacemaker GTUP270EMWW, Service Manual

Page: 69 / 101

Copyright General Electric 2010
Washer Motor & Transmission
• The speed sensor in the motor operates on a 10 vdc signal from the control board. The
control board reads the pulses from the motor to determine proper operation. This signal
can not be read with a conventional multi-meter while operating. Besides diagnostic error
code mode
– disconnect the sensor harness from the control and read AC millivolts on the
sensor harness while rotating the spin basket CCW.
• In wash mode, after the water valve turns off, it is normal for the motor to operate in a short
stroke pattern before the regular agitation cycle begins. The motor will then run in both
clockwise and counter clockwise rotation to provide 180 degrees of agitator arc.
• In the spin/rinse mode, the motor runs only in counter clockwise rotation. At spin startup it is
normal for the motor to pulse a couple of times in each direction
– this assures the shifter
gear is set for spin. A clunking noise is normal during this startup routine.
• In spin the control will perform two ramp ups in speed to 290 rpm and then turn the motor
off until 0 rpm is reached. The control will then energize the motor for full spin.
Final Spin speed is 670 rpm for 27" and 710 rpm for 24"