A bunch of years ago we installed a burg/access system in a commercial building. No real problems. When a new tenant moved it we upgraded the system to make access management easier. About a year after they moved in we got a call that the alarm was flaking out. Condensation from the air conditioner on their communication room was flooding down the wall on the inside. I pointed out the problem and that they needed to remember to blow out the condensation line when they serviced it. Six months later they called again. Same problem. Both times I recommended moving the panel, but they decided not to pay the expense.
Now mind you the previous occupant had a burg access control panel in the exact same location for more than a decade, and they had never had a problem.
I received a call on Sunday. Yep. You guessed it. A plastic drip tray screwed to the wall in front of the AC over flowed because... the condensation line was plugged up again...
Now, I haven't verified that everything works yet, but the last two times it happened I blew out the water, let it dry, and powered it back up. Everything worked like a champ. That is an X255. Near the higher end of Napco panels.
Spare the judgmental comments please. There was no air conditioner in that location when the panel was originally installed, and I recommended moving the panel every time I was there after it was. The original occupant just kept everything serviced and it was never a problem. Today I finally get to move the panel.
WAIT!!! There's more!
Last year we had some pretty bad storms here in the desert. One of my customers had some damage and water ran through their P801 control panel. Not just a little. I was afraid to walk in the room as there was standing water still coating the floor. When I pointed out the problem they blew it out and powered it down themselves. They powered it back up and I started receiving signals again. A few weeks later a driving rain blew MORE water in through their not yet repaired damage and the panel flaked out again. Same thing. Its been working perfectly for a year after the powered it back up again. The P801 is near the low end of Napco panels.
I don't know if that is just luck or if Napco really builds their panels to withstand a flood, but...