Geovanni,
Welcome to the adventure! The step is controlled by 3 variations. If you are parked and want the step to stay out, there is a switch near the entry door inside that turns off the controller and leaves the step out. If you were to leave that switch off and get ready to depart and forget to turn the switch back on and start the engine with the door closed it will automatically retract the step. If you stop the vehicle and open the door, it will extend the step "one time only". This is so you don't fall out and hurt yourself.
When you log into the Beaver website, click on technical banner and then scroll down to "coach assist" it will take you to our library of all the information about your coach, including your step, batteries, charging systems and so on. Hope this helps, Fred Brooks