Two days ago it stopped running with a lo pressure fault. I checked the system and found a burned and loose wire that connects the low and hi compressor contactors. I replaced and tightened the wire. Also found a blown fuse at main disconnect. Replaced fuse. When I try to restart the unit the water flow begins as normal and the unit clicks but compressor does not start. Heat Pump breaker trips when trying to restart.

Nope,
You need a technician unless you are prepared to replace a compressor your self.