Is your AP configured to work with some controller? It seems AP can't reach the controller and reboots. It's normal behavior. You probably just need to configure AP (or network) properly.
Anyway, if you ask for help, please, specify your setup in more detail, nobody can give you really useful advice when your setup is completely unclear.
Unleashed is product solution name and master AP is the base of an Unleashed network (acts as controller for rest of the Unleashed network).
Please provide more info, as asked by Eizens.