Cooling preventative maintenance performed on three Daikin systems Check filter - x3 210 popup filters new today Set up thermometers on each system to verify delta T Rinse down all outdoor coils with garden hose Clean ERV pre filters and main core by blowing out outside then vacuuming clean. Did not hookup guages because I was the installing technician and know leak down/pressures were proper upon install and there are no current issues system wide Delta T - 18° main - 21° master - 20° 2nd floor All three furnaces and A/C’s are in optimal running conditions.