2 beep alarm @ 2 min intervals

[captsavvy]

So my 2004 maxum 2400se with a 5.0 mpi mercruiser bravo 3. We were cruising around the harbor, all was well for 45 minutes. I start to get an alarm code with 2 beeps around 2 minute intervals. Would anyone recognize this code and if there are any links to where I could download a pdf list of all the codes, I need to be aware. Thank you.