Why Did My Dual Function Circuit Breaker Trip? 
Why did my circuit breaker trip? SECRET REVEALED! AMAZING TEST FEATURE on DUAL function AFCI breakers. There is a built-in test feature on essentially all Dual-Function AFCI/GFCI breakers that will tell you the cause of the trip. This test will tell you if the breaker tripped because of an arc fault, a ground fault, or because of an overcurrent event. This video shows you exactly how to perform this 5-second test. Then you will know where to go first in order to solve a repeatedly tripping dual-function breaker.