Swapped both CR relays and CC relays from working car, I'll double relay bases next week.

Do the calls cancel at the exact same time? If they do, there must be some continuity between CCR & UCT/DCT, maybe a short or jumper in UX or DX relay or base. There should be no continuity with both UX & DX dropped or with them removed. If the far call cancels early, I'd be curious if it cancels before CR picks, maybe something jumping around The CR contact. You may want to block CR contact 1 from closing to prove that the call is dropping through that path. CC is a black 32vdc relay right?

CC relay coil is 32VDC. Calls do not cancel at the same time, call ahead cancels later, but before doors begin to open.

Is UX/DX re-picking before the doors open? Maybe a problem with the CS relay could cause UA/DA to pick as son as LUD dropped. CS should stay picked until door open time expires.

Newmech,
I've been following this thread from when you first wrote. Have you found what is causing the trouble yet?

Not yet, took a four day weekend. Should have some help this week, I'll be sure to post the resolution.

Did u fix it

Problem has not been resolved. Issue appears to be caused by V relay picking and dropping. We started pulling wires, we have three sets of prints and none of them match our controller. The customer needs to purchase prints.

You may want to check how your V relay contact in you CS circuit holds in CS for your first slowdown before a call is canceled.

Resolved

Finally got job specific prints. 10A2 was not picking because..............of a bent contact in the relay base. Bent the contact back into place and all is well.

Peski bent contact!