Home + Control app
Click on the red banner “[name of the AC Controller] cannot be reached”, then on the “Wi-Fi configuration” button, and follow the instructions. It is also possible to launch the configuration from the settings: Settings > Manage my home > [Controller room] > [Controller name] > Configure network.
Remark
If the configuration procedure is not successful, reboot the smartphone and try again, making sure that its Bluetooth and GPS modules are activated before starting the Wi-Fi configuration.
Updated