Ubiquiti Networks UniF AP Outdoor - Manual (Page 5)

Hardware Overview
LED
LED Color Status
Flashing White Initializing.
Steady White Factory default, waiting to be integrated.
Alternating
White/Blue
Device is busy; do not touch or unplug it.
This usually indicates that a process such
as a firmware upgrade is taking place.
Quickly
Flashing Blue
This is used to locate an AP.
When you click Locate in the UniFi
Controller software, the AP will flash. It
will also display the location of the AP on
the map.
Steady Blue
Indicates the device has been successfully
integrated into a network and is working
properly.
Steady Blue
with occasional
flashing Indicates the device is in an isolated state
(all WLANs are brought down until an
uplink is found).