Digging into an old-ish Cyberpower UPS that periodically (every few hours) faults out with beeps and an LED indication. The manual simply says 'UPS FAULT' which of course is not helpful.
The batteries are brand new and in general, it works normal, until the fault shows up a few hours later. I don't think that I have much of a chance to track this down without a block diagram and schematic. Hopefully some description of what faults will trigger this error.
Has anyone ever found schematics for these units?
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