Your details are sketchy. Regardless of what you had it set to, if it came on and popped a fuse, you should have it checked out. Replace the fuse (Please unplug it 1st!! ; ) with the same rated fuse and try again. If it fails a second time, you need to pull it out and consider it deadly poison!..Ok, well, not deadly poison, but it surely has a short in there and needs serviced. If the issue is that it ran and never shut off then popped a fuse, you may indeed may either have a problem with the chiller itself (Freon anyone?) *or* its way too under rated for the job. HVAC devices do have duty cycles associated with them and its important not to run them 24/7..Not to mention your electric bill..
Do be careful..