Honestly, in the Med, we've never turned on our a/c. Ours is currently underperforming, but I don't plan on wasting any money
fixing the a/c until we leave the Med.
The water here is a very comfortable 72-78 degrees F (not sure what that is C), so the inside temp of the boat remains very comfortable all the time even without fans. We even have heat absorbing teak
Basically, I wouldn't even worry about fixing your system. Just wear less clothing
and enjoy the med climate.
BTW: Nice boat, we almost bought a Jeaneau 54DS, awesome cockpit