Ignore GTS answer, the Scantronic 9651 and other models are designed to bleep in a mains failure, If your battery was faulty the keypad would display this on the LCD display.
You need to enter the user code to stop this, but since you dont know it, the panel needs a first stage default, which is so easy to do, even you the customer can do with instruction over the phone.
This first stage de-fault will take the panel back to factory codes.
Give me a call and i will talk you through it.
Regards
Nick 07842 480037
Nick, October 2010