Scooters have a built-in diagnostic system that will show a code should there be a malfunction. In most cases the code will be an audible beep and/or the left-most LED light of the battery gauge will blink. The beeping/blinking will be in a noticeable pattern that can then be used to determine what the malfunction is all about.
But if your scooter should just beep once every 30-45 seconds, however, that is not a mechanical fault. Rather, it's indicating that the scooter batteries are approaching depletion. The battery gauge may or may not show the batteries are discharged when you hear this beep.
When you get this widely spaced beep tone, charge the batteries completely until the light on the charger indicates they're fully charged, disconnect the charger and then ride the scooter. If the beep every 30-45 seconds continues to occur, the batteries should be replaced.