On my arrival I replaced the condenser coil, biflo filter drier, and defrost sensor. The extra parts were provided with the replacement coil. I performed a nitrogen pressure test on the system at 300 psi for 30 minutes. I vacuumed the system to 450 microns and held for 45 minutes. Reassembled the condenser and started the system. I added 4 pounds of r-410a refrigerant to make system operational. The system is operating with a 18° split. I checked the drain also and brushed the trap. The system is operating as it should @this time.