Ups gave long continuous sound - APC Back-UPS XS900 (BX900) UPS System

Hi there,

A couple of things, first, are there any high-load devices plugged into the battery backup side of the unit? (Microwave, laser printer, and so on.) If so, there's your problem :). These devices cause a BIG load on your power system and need to be on the "surge protection only" side of the unit or plugged in to another surge suppressor.

If that isn't the case, it sounds like the UPS battery is bad. Here's something to try:

1. Shut the UPS off when this happens.
2. Take ALL load of of the "battery backup" plugs by unplugging them.
3. Start the UPS.
4. After the short self-test (the light blink and a few clicks are heard, in most cases), you should see a green light.
5. Plug in the loads that you unplugged from the battery backup side one at a time.
6. As you plug each one in, leave the ups turned on, but yank the power cord from the wall (unplug the ups from the wall while powered on and plugged in with a device drawing backup power from the unit)
7. Then, if the alarm goes off, you've confirmed that the battery can't take the load. So, it'll need to be replaced.

You can obtain ups batteries just about anywhere. (e.g www.planetbattery.com) All you need is the model number off of the battery and you can order a new cartridge. Make SURE the battery looks like and has the same voltage as the bad one to be sure your new one will function properly. Your manual should cover opening the battery door and replacing the battery.

Regards,

cyan990