My UPS keeps screwing up

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Hello, I have a Schneider UPS That I bought last June and it has now taken to screwing up at in opportune times.

We had a power outage at the cottage when I was not there, and I could tell it was not working because I could not access my thermostat via the UPS. So, I had someone go in and check, and the UPS was screaming with a loud tone, which is unsure some sort of alarm, and of course, the wifi which was connected to it was not functioning.

There is a reset button on the front that my friend held down until the tone stopped, and then everything was functioning fine.

Now it is not working again, and there's no Power Outage, so that could not be the cause.

Any ideas?

Thanks,
James.

 

[Oaktree]

What's plugged into it, and how close to the UPS's rated load is it? A printer or something with a motor in it might have a larger start-up draw than the UPS is rated for.

 

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Very little is plugged in to it. Just the wifi and a cordless phone.

 

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Btw it is a good-sized UPS

SCHNEIDER Model BN1350M2 by APS

 

[John0829]

When mine start screaming it is a sign the battery inside has failed. On average I get about 3 years per UPS and I have four of them.

 

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When mine start screaming it is a sign the battery inside has failed. On average I get about 3 years per UPS and I have four of them.

Well, that is a bummer. I just bought this last June!