Gentleman, first time poster here but looks like a helpfull bunch of guys.
As the subject line says, I'm upgradeing an old otis 7777 screw drive resistance control operator to a Otis AT400. The install went fine but after wiring up everything as the cut in prints say to, no commutation between the LRV 3 controller and the AT400. Door takes and holds a learn run but that's it. Also, and I have no clue way,The car won't run on normal just car top inspection. Unitech is no help past the door operator and as this is my first one, it's driving me nuts. I would be forever grateful for any insight anyone would have. Thanks for even reading this.