10-3-23 Performed summer light check out. filter replacement, and visual 6 Daikin rooftop units 1 Daikin server room, mini split Replaced all filters in the rooftop units and dated. Checked the server room mini split, washable filter was clean RTU-2.1 There is a communication fault code. Daikin service tech is on site, taking care of it. All other Units are working properly.