I have a Scantronic 9651 system in my home. I’ve just replaced the battery with a similar 12V 3.2Ah battery because the keypad was emitting a continuous tone. (Old battery was 7 years old). Got it all working okay for the last couple of days but when I came back in today the alarm was unset, the clock had reverted back to it’s default time and there’s a continuous tone from the keypad which isn’t silenced by a user code. It’s not a constant beeping but a continuous tone. (There was no mains interruption). The user manual doesn’t mention a continuous tone fault. I’m aware that a constant beeping usually means a low battery fault but it’s just been replaced. Any ideas anyone?