I was in the process of vacuuming down a new R410a system and down to 340 microns when the vacuum pump tripped the breaker and lost power. By the time I got the hose valves shut off it had already drawn vacuum pump oil into the lineset. I disconnected gauge set, hoses and cleaned gauges and hoses with alcohol and used nitrogen to clean hoses. I also pressurized the lineset to 100 psi and removed all oil that i could by opening and closing hose valves. Reconnected pump and was only able to vacuum down to 1400 microns and held with no leaks. Added refrigerant for length of line set, opened condensor valves and started system. System seems to run fine, cooled well. Question is will oil in the refrigerant cause problems and if so how do I clean the system without damage to the compressor?