In the elevator trade, the words were a running joke. They usually meant a single, photocopied sheet of paper loosely inserted into the back of the binder, often written by an engineer who had since retired, died, or been promoted to a windowless office. It was the industry's way of saying, We made a mistake in the book, good luck finding it.
Elevator stops between floors. UPD display shows "OC1". Controller shows "Drive Fault". xizi otis elevator manual upd
A central part of the manual is the calibration procedure. Users must toggle specific settings (like CHCS and DDO NORM ) to perform a hoistway learn run, which maps the floor positions. In the elevator trade, the words were a running joke