i am working on an old honeywell fire system in a 20 story building. i keep getting an a/c power loss error but i am not losing a/c power. i put a fluke recorder on both the 120v input and 29vdc output and havent seen more than a .3v change in either. ive tryed new power supplies, boards, and input power source. any ideas what might be causing this?
16 years ago