This was a reply I received from Fance last year when I ran into the JCI wall.
The maximum AV is around 2000, sorry about this Bret. We’d change it right away but the changes run pretty deep, we’ll at least have T3000 show an error message when it encounters this situation. And we’ll add it to the todo list for the upcoming ESP32 based unit which will be in production in a month or two.