Preventative maintenence inspection on three Lennox AC s0lit systems. Replaced all air filters, and shut humidifier dampers. Tested blower motor capacitors. Visually inspect indoor air coils, and flush out drain pans. Check thernostats for any warnings or battery level indicators with none found. Run test each unit in cooling mode from respective thermostat. All systems are operating within specs for refrigerant pressures/temperatures and supply air delta t specifications. Tested dual run capacitors on each AC. All are within spec. All condenser fan motors and refrigerant compressors are operating properly within Amp draw specifications. No issues found or suspected while performing inspections. Systems are operating properly, efficiently and ready for Summer.