Hello. My name is Michael. I will be helping you with your question today.
This procedure is only if you want to run the Treadmill in Demo mode - it is meant for when they are on store display to demonstrate the features, but rarely used otherwise. Are you sure that this is what you want to do?
To do it, you should be able to enter demo mode by pressing and holding the stop button while putting in the key. Let me know if that answers your question or if you need additional informaiton.