System be inside unit and outside unit was not running. Four codes were showing a communication error with the indoor blower motor and thermostat. I cycled power at the electrical panel to reset the unit. The unit restarted. Went back through the fault codes and showed that the history of default codes was communication error. Both system and system B currently has 18 gauge six wire install throughout with multiple spices. It is my recommendation to replace those wires with communicating wires as recommended by the manufacture.