Welcome to the new Schneider Electric Community

It's your place to connect with experts and peers, get continuous support, and share knowledge.

  • Explore the new navigation for even easier access to your community.
  • Bookmark and use our new, easy-to-remember address (community.se.com).
  • Get ready for more content and an improved experience.

Contact SchneiderCommunity.Support@se.com if you have any questions.

Close
Invite a Co-worker
Send a co-worker an invite to the Exchange portal.Just enter their email address and we’ll connect them to register. After joining, they will belong to the same company.
Send Invite Cancel
84475members
353691posts

New BX900R-CN with very loud hum- Help requested

APC UPS for Home and Office Forum

Schneider Electric support forum for our APC offers including Home Office UPS, Surge Protectors, UTS, software and services and associated products designed to share knowledge, installation, and configuration.

Solved
Fenian_apc
Crewman
Crewman
0 Likes
1
93

New BX900R-CN with very loud hum- Help requested

This was originally posted on APC forums on 12/3/2010


Hi all. I purchased a BX900R-CN UPS today on blowout from a local store. I currently have it plugged in and charging after connecting the battery.

My problem is that the UPS is producing a very distinct, very loud humming noise that I can easily hear 20 ft away from the unit. It is at least 30 decibels.

There are no devices connected to it at present as it is in its initial charging cycle.

The noise is the hum of a transformer, it sounds just like an electrical box or a hair clipper. It is plugged directly into a properly grounded wall socket.

Is this normal for one of these devices? I would hate to return it as I got an amazing price for it, but I already know that I could not tolerate this noise for long as it would be easily audible from my bed.

The serial # is 3B0949X10397. If I return it I cannot get another as this was the last one in-store.

Any help would be greatly appreciated.

Regards,

Fenian


Accepted Solutions
Fenian_apc
Crewman
Crewman
0 Likes
0
94

Re: New BX900R-CN with very loud hum- Help requested

This was originally posted on APC forums on 12/3/2010


A few other notes after disconnecting the unit:

1) A very loud hum persists even after unplugging unit from wall, even with the UPS power turned off.

Unit is very warm to the touch and has that "hot" electronics smell that rarely means anything good.

I have unplugged the unit + disconnected the battery for now.

Regards,

Fenian

See Answer In Context

1 Reply 1
Fenian_apc
Crewman
Crewman
0 Likes
0
95

Re: New BX900R-CN with very loud hum- Help requested

This was originally posted on APC forums on 12/3/2010


A few other notes after disconnecting the unit:

1) A very loud hum persists even after unplugging unit from wall, even with the UPS power turned off.

Unit is very warm to the touch and has that "hot" electronics smell that rarely means anything good.

I have unplugged the unit + disconnected the battery for now.

Regards,

Fenian