The controller thinks the car doors are open when the hall doors are locked. Does this always happen at the same floor or different floors? Have you already changed the GL, HWM, FG Relay?
What kind of door operator do you have? You could be losing the DOL signal intermittently. Or the hall door could be uncoupling from the clutch. I would look at all these different scenarios. Good Luck!
The tech has already replaced the GL,HWM and FG relay. The door operator is new otis unit. We did this upgrade to all 6 unit in the building at the same time. But this unit is the only one that is having this issue. I will pass this info to my tech. Thank for all the help.
