I'm on site. The problem is it will not stop at the 2nd floor (it will latch a 2nd floor call, but will continually run past) which is also the home park floor. It will run 1st to 3rd and 3rd to 1st with no problems. As soon as the doors close while it is at the 1st or 3rd floor, and there is no registered call, it tries to home park and gets stuck in a loop running top to bottom unable to find the 2nd floor (it doesn't slow down at the 2nd floor in either direction). I have swapped all of the relays related to the 2nd floor (2S, 2C, 2L) with no change. I also checked the vanes at the second floor.
All the relays appear to be working. The latching relays, the flip flop relays, the s relays and the c relays. STU, STD, STX are all functioning. Only thing I'm seeing is SST doesnt energize so CA can't drop out. it will occasionally stop at the 2nd floor, but it's probably less than 10% of the runs.