Please paste the entire line. If i assume that the log you are referring to something similar here - https://forums.ruckuswireless.com/ruc...
then it means that wireless is being disconnected or removed from AP by AP due to reason X or Y or Z. this could happen due to many reasons. AP support file may throw some insights into why this may happening plus some background info from you on the site where AP is used, type of devices in use, type of application, potential interference source etc
hope this helps.