Performed maintenance on all 3 systems. Cleared drain lines, cleaned condensing coils, adjusted blower speed on downstairs system to medium high, and checked refrigerant charge on all systems. Adjusted charge on downstairs system (used 1lb of 410a). Downstairs system is also pulling high start amps on compressor. Recommend adding a hard start kit for compressor. Upstairs system is low on r22 and evaporator has the wrong piston in it. Recommend replacing equipment. Master bedroom unit is low on r22. Will email quotes on equipment for upstairs and Master bedroom units.