Please see below the status of your UniFi access point if you suspect issues are arising from an access point that may be malfunctioning or offline:
Flashing White / Off Every 1/2s
The device is initializing and booting up.
Steady White
The device is ready for adoption.
Steady Blue
The device is adopted and is in normal operating mode. Access Point is broadcasting WiFi.
Strobing White / Off
If this happens, power cycle the Access Point.
Quickly Flashing White / Blue
The device firmware is currently being upgraded - do not interrupt the process.
Blue and Flashing Off Every 5s
Access Point has lost network connectivity and is searching for a wireless uplink.
LED Off
The device is offline.