National Time & Signal NAC Panel Trouble

Not sure how many people on here are familiar with National Time & Signal systems but I am at a loss on how to fix the issue I am having.

I am getting a trouble on one of the NAC panels whenever the system is in alarm condition, system is normal otherwise. The NAC Panel is showing a short on one of the two output circuits. I originally thought it was one of the devices that was causing the issue, but could not locate any. I then removed the wires from the troubled circuit and fired the system again, the NAC circuit still showed up as having a short. I ordered a new panel thinking the issue was within the panel itself. I just finished swapping all the parts from within the panel and I am getting the same issue. Any thoughts?