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Look in Airport Utility preferences and see if you have this check marked. If you do, it will make AU popup when a problem is detected, and that sounds like what you have going on. Does the Airport seem to be working okay when this happens?
Screen_Shot_2015-10-23_at_11_57_40_AM.png
 
Thank you. I have taken your suggestion. I hope it works. My AirPort seems to be working ok, but it is a big net so who knows what is going on with each component!!
 
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