I have a site with 4 20 ton RTU's with Simplicity boards. We have been having problems from day one with these units. We will see points randomly change without being written to from the BAS. I noticed that all of the factory wiring to the 1A board is shielded wire and is grounded to the chassis. There are however, 2 pairs of wires that were field installed by the ATC contractor that are not shielded at all. Could this be causing some of the failures? Is there any installation manuals for the 1A boards? Thanks in advance.