I have a KCM831 3 stop hydro on my route that has had numerous callbacks for fault 0001 = low oil timer. This is a twin post with a Saturn drive and a GMV 3010 valve. When the 0001 fault happens the car stays at the the middle floor with the doors open till the power is cycled which is weird because I thought low oil returned to the lowest floor.for starters I changed the ADON board because I know your car speeds are read through that. Well it came in again tonight and I have to go tomorrow to troubleshoot. Any ideas ? DRV Board ? Soft starter? Door locks are clear also.

Is the middle floor the fire floor?

Know this sounds stupid,,but is there enough oil in tank?

The car will return to the bottom floor if it is between floors. Have you tried to make the car re-level at the middle floor. you may have tight or dry rails, or the valve relief is not set right.

Broken 30 wire. Used a spare ..... Never came back in