System has 3 expansion packs and 1 itm. Issue is we changed out the itm with a new one running on version software 1.29.00.
Old itm had an issue with the touch screen. Old itm can see all 207 indoor units but when we changed to the new itm which is loaded with the same setup is does not see any units. Disconnected the expansion packs and the new itm can see the units connected directly to it but when we connect the expansion packs it doesnt see any units and goes into a system fault.
Any help would be appreciated. Thanks in advance.