Hello all, I’ve been working on a 3 stop KCM831 with a KDL16L drive.
About every two weeks I will find the car 4 inches above top landing on final. Only error shown in fault log is 21. I have found a little oil on the tach wheel that’s on the motor. Could this be a possible cause?

Any other ideas as to why I’m only logging a safety fault?
The only write up I have for this controller are the error codes. If anyone has any other write the may be able to help. I would be greatly appreciative.

And how would one go through properly cleaning oil on the sheave. I don’t have an access door to the motor. And with the motor in the shaft, I’m limited to the amount I can clean from the car top.