Back-UPS Pro 900 end noise?

Anonymous user · ‎2021-06-29

I have buy a Back-UPS pro 900 but when i turn it on emits an continuos noise is normal? Noise should issue only when running on battery and not with operation from 230v mains. I buy it because my Apc RS 800 is ko ! The 800 when run on 230 volt main supply do not emits any noise. The 800 emit noise only when work on battery.

Thank you

Message was edited by: fbassini

Anonymous user · ‎2021-06-29

Hi fbassini, it sounds like this ups could be overloaded. If there too much equipment being plugged into this ups, it will emit a loud constant tone when on battery. I would suggest trying to remove a few devices and then see if the constant tone goes away when the UPS is operating on battery. Hope this helps.

See Answer In Context

Anonymous user · ‎2021-06-29

Hi fbassini, it sounds like this ups could be overloaded. If there too much equipment being plugged into this ups, it will emit a loud constant tone when on battery. I would suggest trying to remove a few devices and then see if the constant tone goes away when the UPS is operating on battery. Hope this helps.