Performed preventative maintenance on a DAIKIN 2 head mini split system. Upon arrival both heads were off. Turned both on with the single remote. For the bedroom coil, I opened the panel and removed the washable filters. Went outside and washed them off. Checked the louvers to make sure they were operating per the remote. Cleaned off any dust build up on the coils and the grates in front of the coils. Poured water into the coils and watched the water drain properly. Placed filters back on unit and closed the panel. Turned the unit back on and watched it run. For the spare room coil, I opened the panel and removed the washable filters. Went outside and washed off the filters. Checked the louvers to make sure they were operating per the remote. Brushed out any dust build up on the louvers and the metal grate in front of the coils. Brushed off the coils. Poured water into the coils and watched it drain properly. Placed the filters back on the unit. Closed the panel and watched the unit ru