Performed pm on all units on site. Found User interface for Desert Aire 1 not showing but still following program, office will follow up with quote to replace. Found Tandem Compressors for Desert Aire 2 tripping contactor because they are grounded, need to be replaced. Office will follow up with quote. Found humidifier Solenoid for unit 3 not feeding water, quoting to replace. Found carrier HeatPump Outdoor fan running loud and overamping, quoting to replace. Finally, I found capacitors for Units 1, 2, 3, 5, and 6 out of spec, quoting to replace. All units are heating normally besides Desert Aire 2.