Fuse Panel and 240v power

Hello everyone. I hope you are enjoying some quality sailing. Towards the end of an extended trip this week, the fuse panel light f8 came on permanently and when I connected to shore power I was getting a red light instead of green and getting power through the 12v system but not the 240v connections. I suspect these two things are indicators of the same problem.

F8 is a custom button, check if you have anything programmed on it, but if it flashes once every second or so, this means the fuse is blown. And Gregg is right about reverse polarity, it also happens in many places in Caribbean where they make 240V out of two opposite 120V, making both lines hot. Your boat however should have curicuit breakers on both lines, somewhere close to the shore power plug, maybe in one of the cockpit lockers. Nothing to worry about unless someone somewhere was messing up with your boat electrical and attached  ac neutral to dc negative.