The most frequently replaced items on the parts list are the filters. Neglecting these is the primary cause of compressor failure.
When looking at a parts list, most maintenance managers look for "Service Kits." For the 2011 GA 75 VSD FF, Atlas Copco typically groups parts into maintenance intervals: -2011- atlas copco ga 75 vsd ff spare parts list
Do not run a 2011 VSD on dirty power. If your facility has harmonics, install a line reactor. The IGBT modules in the 2011 drive cannot withstand modern switching transients as well as new drives. The most frequently replaced items on the parts