The switches I was thinking about were the 14 and 15 switches. The core can unscrew and the switches pick up partway and don't make aand break the contacts properly. This throws the compounding out of whack. Also, if the 14 and 15 don't pick at the proper times, you could have the same result. If you don't have motor field, there is a relay that wont let you run at all. If your shunt field is too low, you will drift up, not run up. Has anyone actually witnessed the elevator have this problem? Or are you seeing the end result and not what is actually happening. When it gets to the top floor, does it slow down normally, or does it come in hot. You had said that the problem only exists if it makes a run to the top floor. If it stops at 5, and then continues to 6, the problem doesnt exist?? Put a diode from 6c to 5c, so if someone or something sets up 6, the car will first stop at 5. Before you jump the final, what motion relays are in? When you jump the final, do the motion relays come in or are they already in? Have you checked for continuity on the directional limit when it is on the final? Paper the directional, if it still moves with motion relays, something is shorting into the up motion circuit. It will be interesting to find out what it was.
