why my new UPS is noisy?, or maybe its normal?

[Anonymous user]

I just buy the apc Power Saving Back-UPS 750 and it works great.

The only problem I have now is the noise of the ups whether or not Im using my pc, even when the ups is off, with nothing connected to it and the ups connected to the wall outlet, the ups sounds always have similar noises like the ups in this video:

http://www.youtube.com/watch?v=jw14sS2EntM

At the first hours of using my ups , it almost sounds like the ups of this video (40% less noisy) , but later the noise became more constant (without pauses which is a little better). Edit: the noise with pauses came back.

Is the ups damage? because my last cheap ups was noisy ONLY when my pc was using its battery, or this noise is normal?.

Message was edited by: Chapapa07

[BillP]

It is possible the ups is trickle charging the battery, so give it a few days see if it goes away 😛

Get back to us

-Wwallender

[Anonymous user · Accepted solution]

Exactly, the manual says that it needs to charge 16 hours.

10 hours later, the noise disappeared !.

The problem was solved, the ups now is silent! .