Hi
Just looked in my manual for you. it says:
E1: No feedback from controller or speed sensor
1) check the condition of cables and ensure that all plugs are connected between the motor controller and display.
2) Check that the speed sensor and magnet are in correct alignment and that there are no obstructions on the magnet (the magnet can be found on the front roller near the motor belt).
3) If the running belt moves then displays the E1 error replace the speed sensor.
4) If the running belt does not move replace the controller.
Hope this helps.
Barry, June 2011