My treadmill is displaying a code on the screen E11. It runs for awhile then it stops. It is a tracker 3510 series made by keys fitness. I don't have a users manual.

Serina, February 2009

E11 - Lack of speed feedback data from belt motor. Attempt re-calibration. See Calibration
Sequence section in your user manual for detailed information.
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You can acquire a user manual for your series treadmill at:
http://www.keysfitness.com/index.php?menu=manual
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