I have a Sea-doo challenger 180 (2007). I purchased it last year and it ran fine all summer. It was stored over the winter and did great when put back in the water. Now there is an ear piercing beeping noise which occurs very 5-30 sec. I have scoured the owners manually. Battery checked out. Filled the antifreeze. Check the oil. Any ideas what the beeping is about? The boat runs fine otherwise.