You do need to locate the slide "controller" -- it's a small (relatively) electronic box (...maybe 5" wide) & has LED + wires running to/from. It's likely mounted/located (may be well hidden!) behind a panel somewhere
near the slide. If (when?
) there's a failure to retract, that's probably the first place to look...and, there's a procedure for re-setting the controller to retract the slide. If that doesn't work, the next
"procedure" as already mentioned involves accessing each of the two electric motors, removing a retaining screw on each & slipping the motors out of the drive teeth...then, probably with help, push the slide in from the outside. Here's hoping that neither you (or I!
) ever have to actually experience the issue.