HOW I CAN REMOVE THE ERROR l5 CODE?

Hi! i have a treadmill free spirit series club, and when i change de belt, i start the treadmill whit no belt. So after 2 minutes running, the error L5 code its appear..My question his, how i could reset or restart the treadmill, because, now, when i turn on the treadmill, the motor dont running, and after 1 minute, the ERROR L5 code come again....???

allan
September 2016