You should first probably check the tightness of the chain. On one end of the cable, where it meets the chain, there is a turnbuckle style tightener. Don't overtighten, I think there is a set-nut for keeping things in place once you tighten it. I only mention this b/c it might be the reason for why it jumped the track.
Top and bottom position set:
- First set the bottom position. Press and HOLD the bottom set button, then while holding that in use the move down and up buttons to bring the door down to touch the concrete. Do it so that the pipe that the chain goes around bends up just a little from the down force. Once in the proper down position then let go of the bottom set button. - Then do the same for the up position.
- Then operate the door using your hardwired buttons for at least two full down up cycles to make sure it is fully "learned". If it doesn't stay down but bounces back up automatically then do it all over again, setting down and then up but do it so the pipe doesn't bend up quite so high. NOTE: make sure there is no dirt or leaves or debris built up where the door hits the ground first. Then, you need to re-check your down and upforce settings to make sure they are only just high enough for the door to operate. First check that the door automatically bounce back up off the floor if you put a 2x4 flat on the ground under it, or if you trip the re laser light sensor. Then make sure you can easily stop it from going down with your hands at about waist height, stopping it - don't do this from outside as you could get pinched and crush your fingers. If you arent' comfortable doing this then get someone else - BE CAREFULL!! If you can't do any of the previous then lessen the downforce. Test the upforce by trying to stop the door going up at about chest height with your hands. Can you stop it easily? Would a 40 lb. child caught by the hood string reverse it so he won't be strangled to death? - see these things ARE important. Lower the upforce so it is only as strong as you need it. Also, you should check to make sure the springs are firm enough to at least hold the door up from falling when about 1/2 way open. This adjustment can be EXTREMELY dangerous so don't attempt it unless you know what you are doing. If your springs aren't set right and pulling evenly then it can overtax the motor and/or require an unsafe amount of upforce, etc.. The remote button I think you press it and then press your remote button while it is still flashing so that the frequency is learned, something like that. PLEASE make an effort to get a new copy of the manual because it insures that this is run safely. Lots of people don't realize how dangerous these things can be if not maintained.