Just got to experience the "manual override" this past weekend as the roof wouldn't go down. When we bought our 2015 Jayco 1207 last year I was most nervous about the remote/electric raise and lower feature. And unfortunately, my fears have been confirmed... twice. Shame on me for not being prepared (my Boy Scout leaders would have scolded me), but since it was "new", I didn't bring along the drill, extension and 1/4" bit in case I had to raise/lower the roof due to electronic failure. So I was doing this with a ratchet. FYI; the motor is geared to move the roof 1" for every 80 rotations. That equals a long time and sore shoulders. My dealer (Burlington RV in SE Wisconsin... who have been great) DID explain the need for a drill to manually raise and lower the roof. Unfortunately, I assumed that Jayco was smarter than me and the system was solid. I've been bit twice now and am awaiting a call back from Jayco to see if I can have my 2015 1207 retrofitted with an old school crank.
Anyway, that's been my experience. Good luck to you!