Diagnostic on attic system, Called tech support and ran many tests, per tech support we must install an electronic bypass and connect it to zone 3. Performed cooling maintenance and cleaning on 2 Hvac system. Flushed the condensation drain line and cleaned the condenser coils, checked refrigerant pressures, found little low in refrigerant added refrigerant then cycled the system. * R 410 a refrigerant recharge by super heat and sub cooling