I have the same issue happening, always around the third landing. We have the encoder running on the rail for positioning. Was told the change of direction fault could be caused by clipping the door lock. Was also told to look for dirt on the rail or it could be ropes jumping on sheave, i don’t believe that one. We have cleaned off the rail and adjusted the door lock at the 2nd and third. According to the tenants they have only noticed an issue in the up direction. Is your fault happening throughout the hoistway or only in one area?
