Hi all - long time youtube watcher, new-comer to the forums!
I have a server rack at home that has an APC Smart-UPS 3000XL in it. It's a 120v UPS that I run. Recently, a fan inside starting making an annoying noise. Now, I've read that the unit is not "user serviceable" but these are fans - how hard could it be? I am cautious because I know there is an inverter inside, etc. to charge the batteries and all. So, my plan would be to disconnect the battery module, disconnect service power, open the top lid, and see if I can deduce which fan is making noise. I could, perhaps, even power it up on the bench to hear the fan with the lid off. Either way, is this insane or anything? I am suspecting there are either 120v fans or 12v fans inside - a read on a forum that it's dangerous but I can't deduce if its a true risk or if someone is overly cautious. The internal temperature indicated by the network management card is 68F so no worries there.
I've built wiring harnesses for race cars, wired 240v 50A circuits for my welder/plasma cutter, etc. Am I being ignorant here?
Attached a youtube video for reference to the sound
Thanks all!