Aha, you mean the Pramac agent? There is not one in Trinidad, the nearest listed is in the Dominican Republic. See here
http://www.pramac.com/worldwide
.
The first thing I would look for would be internal fuses blown. This sounds like a 460 volt 12,000 watt industrial generator and you probably should call the installing contractor for service. My 15,000 watt generator is over 30 years old and has less than 700 hours on it and those are mostly test-run hours.