Error Messages22Treadmill Error Messages.Your treadmill is equipped with a software package that enables error messages to be displayed when there isa problem. The following error codes will be displayed in the console display windows.Safety Interlock Error MessagesSI 1 - Safety key missing, replace and try again.SI 2 - Over voltage protection trip. Notify Keys Fitness Customer Service.Other Error MessagesE11 - Lack of speed feedback data from belt motor. Attempt calibration. See Calibration Sequence section onpage 19 of this Owners Manual for detailed information.E22 - Under Speed condition detected from the belt motor. Attempt calibration. See Calibration Sequence sec-tion for detailed information.E33 - Over Speed condition detected from the belt motor. Attempt calibration. See Calibration Sequence sec-tion for detailed information.E44 - Stuck key detected at power up, Notify Keys Fitness Customer Service.To avoid possible damage to the treadmill and the possibility of injury, do not operate the treadmilluntil the problem is corrected. Call Keys Customer Service at 888-340-0482.