What's the nature of the alarm light? If it's the power light blinking blue and red in alternation - you can look in the manual about what the alarm is based on the speed of the blink and the number of blinks for each color.......

I have two different SL1100 that blink a pattern with no reference in the manual. I have reported to tech support and not gotten any help. There are no issues with either system though, so I guess we are chalking it up to something in the software........so, I just let em blink.