Do they preventative maintenance on a four zone mini split heat pump. During the maintenance I cleaned all filters in the air handler‘s. Then turned on the heat to make sure they were all working properly. Then went outside borrow the heat pump check temperatures and pressures to make sure all the refrigerant was good which it was. Made sure all drains were unclogged. System is running properly at this time. M#ASU9RLF1 s#MXA 252562 m#ASU7RLF1 s#MWA 179202 m#ASU7RLF1 s#MWA 179677 m#ASU15RLF1 s#JWA 015314 m#AOU36RLXFZ1 s#LXN 058129