NTTL0961 Nordic Track EXP 1000X MC-80 Motor Controller LEDs

Oct 25, 2020

The MC-80 motor controller is used on this treadmill. It has four LEDs that can be used to help +troubleshoot electrical problems with this treadmill. Each LED, and its meaning, is described below:

+12V. This LED indicates the controller is outputting 12 VDC to the speed pot. If this LED does not light when        voltage is applied, replace the controller.

SPD SIG. This LED indicates a speed control signal is being received from the console. The LED will flicker when a speed signal is present, but the intensity will vary depending on the speed setting. If this LED does not light, but +12V does, it indicates a problem with the speed pot or pot wire.

SCR TRIG. This LED indicates that the SCR is triggering on the controller. If this light is out, no voltage will be sent to the motor. This LED will vary in brightness depending on the speed setting. If  this LED does not light when the safety key is inserted and SPD SIG is lit, the controller will need to be replaced.

CL. This LED lights only when the amperage draw of the treadmill is near the current limit setting. If this LED lights frequently, it indicates a worn walking belt or board, or a tight walking or drive belt.