I have a 50 ucl. When it first starts in the morning it will make 3-6 trips fine. After that intermittently it will run up and down on leveling speed. Motor fields good. All contactors are up. I believe that the problem is in the loop circuit, but I'm not sure the sequence and have some conflicting prints for this job. Are there any old otis guys that have info on this? Or a write up?

thx.