At that point, I decided it was retirement-and-teardown time for this unit, albeit preceded by a bit more experimentation (only during waking hours, mind you…the ongoing noise was getting my wife really annoyed). The next day, I turned the UPS back on and…it was fine for a couple of days, when it again woke me up in the middle of the night. So, I manually shutdown any devices connected to the UPS that wouldn’t respond well to an abrupt power outage, then powered the UPS itself off. Too much current being pulled through one (or multiple) of the device’s battery-backed AC outputs, when the sound’s not accompanied by topside flashing lightsĪgain, it was the middle of the night, and I (deludedly, as it turned out) aspired to get back to sleep.A dead (or disconnected or otherwise not present, for what it’s worth) battery, when the alert sound is accompanied by topside flashing lights, or.And this time it was a constant and piercing tone, coming from one of my uninterruptable power supplies ( UPSs) there, which if you reference the user manual, means one of two things: More recently, the din happened again, this time in my office next door to the master bedroom. I didn’t realize my error until after I unhooked it and still heard the beeping going off. I was so groggy, as you’ll see from reading my tale of woe, that I at first thought the sound source was the smoke detector wired up at the ceiling. It happened last year, when a carbon monoxide detector downstairs, plugged into an AC wall outlet, decided that it’d gotten too old and was due for retirement and replacement. I don’t know why…maybe I’m just a “lucky” guy…but it always seems that devices capable of audibly alerting me when something’s wrong with them always seem to “sound off” in the middle of the night, while I’m sound asleep.
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