If you look in the service manual for that slide system, there is a service function you can access thru the controller in the basement. There's a little button that you press X-number of times to get different functions. Had to make use of the manual function last spring as when we got ready to leave the bedroom/washer-dryer slide would come all the way in. Got it into manual mode, slide in, and repaired later that morning (a pin had pulled out of the connector housing) along with the yearly inspection.
Michelle & Ann
2018 Chevy 3500HD Crew Cab High Country DRW, D/A, 2016 RW39MB, Dual ACs, Auto Level, Auto Sat Dish, Stack W/D, King Sleep #, 17.5" Sailuns w/Disc, MORryde IS & Pin, Comfort Ride Hitch, 5.5 Onan, Res Fridge & Induction Cook Top