DCM9 complete; AC; (8) 20x20x2, (4) 20x25x2, (3) 16x25x2, (1) 20x25x1, (1) 16x25x1, (1) 16x20x1, (1) 10x45x1 replaced (2) Washable filters cleaned. All systems are cooling, most units were still on Heat mode, tested systems and returned them to Heat mode.. Outdoor temperatures were a little low for proper testing procedures but refrigerant pressures and temperatures were appropriate for indoor and outdoor conditions. Kitchen unit is cooling, system was extremely low on refrigerant, added 4 lbs of R22 refrigerant. Compressor runs, then binds, shuts down and restarts and repeats the sequence. System cooled the kitchen from 95* to 78* during location maintenance.