Complete 3 system a/c repair and preventative maintenance check. Indoor; cleaned drain line and changed filters, checked electrical connections, amp draw, and capacitor. Found rusted/corroded coils, dirty blower assemblies, and capacitors all reading low on all three units with no water safety for any unit. Outdoor; cleaned condenser coils and checked refrigerant pressures, checked electrical connections, amp draw, and capacitor. Found all three units with low pressures, and duel run capacitors reading low. All systems are back on, but not cooling efficiently or at all. Sending comfort advisor out for a quote on replacing.