Began by picking up compressor from trane. I then arrived on site and got all parts and materials ready before I recovered the refrigerant from the system. Once refrigerant was recovered I cut out the old compressor and drier. Once it was cut out and removed we set the new compressor and drier in place. We flushed the refrigerant lines and made sure they were clean. We then brazed in the compressor and drier while flowing nitrogen. We inspected the welds and pressure tested the unit with 415psi of dry nitrogen to check for leaks and there were no leaks present. After pressure held for 15 minutes, I changed vacuum pump oil and put the system in a vacuum to removed all non-condensables and moisture from the system. I cleaned up the work space, got new schrader cores and setup the nitron gauge and let the system pull down to 420 microns after a decay test. We then weighed in factory charge and tested the system in heating and cooling. The system initially went into a soft lockout due to s