Had a Vista 20P panel lock up on me at a job in Springfield yesterday

I was programming a new install and the keypad just went blank mid-setup. Tried power cycling it three times and nothing. Turns out the backup battery was totally dead and the transformer had a loose neutral from the factory. Ended up swapping the whole panel out since the board was clearly fried. Has anyone else seen this happen with the newer Vista boards or was I just unlucky?

2 comments

2 Comments

riveradams11d ago

Wait, the neutral was loose from the factory? That's wild, I've never heard of that before. Usually it's something dumb like the battery terminals being corroded or a bad power cycle, but a factory defect on the neutral is next level. Bet that was a nightmare to troubleshoot, having to pull the whole transformer out just to see the loose wire. Honestly kinda scary that they're shipping boards with issues like that, makes you wonder what else is getting missed in QA these days.

allen.ivan11d ago

That's not quite the full picture on how this goes down. Pulling the whole transformer isn't the standard approach for a loose neutral. Usually you'd just open up the junction box on the unit and check the connections there first. The transformer itself is just a coil and some windings, not something you'd dig into for a loose wire on the neutral side. More often its a terminal screw that wasn't tightened all the way or a wire that got pinched during assembly. Factory defects do happen, but its usually something more basic like a cold solder joint or a connector that didn't seat fully. Still a pain to find, but you don't have to yank the whole transformer out to spot it.