Panel Not Responding indicates that your panel is not able to communicate with the network and may not trigger an alarm or signal for help in an emergency. This can be caused by the panel not being powered on, problems with the cellular network or cellular radio.
Check if the panel is currently powered on. If the panel has not been powered on for a long period of time, power it back on. After 5 minutes, test the communication by sending a command to arm or disarm the system using the Frontpoint App. The Radio Not Responding message may take about an hour to clear once it is powered on again.