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Hi! I have an APC Back-UPS NS 1250. Recently we moved and I am unable to find the manual. I need to turn off the audible alarm (we use it for our lcd tv and it's annoying when it runs it's checks). Would you be kind enough to tell me how I might turn off the alarm? Thanx! Bob

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Bob, check the links here: BackUPS NS 1250 Manual and Specs .

Posted on Mar 14, 2011

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The unit beeps

I am getting these directly from the user manual (available here:

Issue: On Battery - UPS is supplying battery power to the load connected to the Battery outlets.

Visual Indication: Power On LED - ON (off during beep)

Audible Indication: Beeping 4 times every 30 seconds

Stops When: UPS transfers back to Power On operation, or when UPS is turned off.

- OR -

Issue: Sleep Mode - During On Battery operation the battery power has been completely exhausted and the UPS is waiting for utility
power to return to normal.

Visual Indication: None

Audible Indication: Beeping once every 4 seconds

Stops When: Utility power is restored, or if utility power is not
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