MY frig keeps popping 10 amp fuse in the supply pack. If I disconnect the 4 wire harness that go to fan ,compressor, thermo,etc. and the only thing pluged in is the power supply,the 10 ampfuse still pops. my questions are:

1) can I put 12volts directly to the compressor or do i need to use 24 volts . I want to do this just for a test to make sure the compressor is ok before i buy a new power supply.
2) Would any bad part in frig burn out the suppy pack.
3) I'm not sure if I quick charged the boat without turning off the frig. I understand this could burn out the supply pack.
4) what else should I check.
5)Is there anyone I could call to discuss the with. so far I cant find anyone and norcold says call a dealer and I can't get anyone to help me with my questions.
6) the fris in question is a norcold model# dc451

thank you
dom