Arrived for 2 Ruud systems with communication/inverter issues. Homeowner mentioned he recently opened condenser to wash the coils. After condensers were put back together is when fault codes started appearing. Inspected furnace electrical components, safety switches and thermostat. Inspected inverter driven condensers, checked refrigerant levels and fault history. No faults were stored in memory on inverter but thermostats had multiple faults, all said inverter fault communication failure. Started going through checkout procedures on thermostats and found settings went back to factory default. Programmed thermostat settings, tested system operation in cooling, heat, fan on and fan auto. Noticed the 3 ton system for second floor had a significant wobble. Recommended replacement of condenser fan blade. Will send fan blade replacement estimate once information from dealer is received.