Please check if your Coway Airmega is powered on and if the Wi-Fi LED is on.
Note: If the Wi-Fi LED is blinking, your internet network may have a problem. Please make sure your router is powered on and that you can access the internet using Wi-Fi.
There could be a delay between the Mobile App and the purifier because of the network condition. Please retry the action or restart the Mobile App after a force quit.