Here are the 6 things that can cause a CH arc fault to trip. If they would hold, the blinking light on it would tell you which of the 6 items is the issue. However, see items 4 and 6, as they can occur with no load wires connected.
0 Mechanical Disconnect. The breaker has detected an overload, short circuit, or was manually turned off
1 Low Current Arc. A low current “series” arc has been detected within one of the current pathways. These arcs are typically found in worn or degraded appliance and extension cords, poor connections in appliances or fixtures, or in contacts within equipment
2 High Current Arc. A high current “parallel” arc has been detected between two conductors. These arcs are usually found in installed wiring where the wire has been compromised by a nail or screw, tight staple, damaged insulation.
3 Short Delay. Short delay is an electronic backup to the short circuit mechanism The breaker does not record short-circuit, or overcurrent trips, nor does it record trips caused by pressing the TEST button, or manually switching the breaker off.
4 Overvoltage. The breaker will trip if it experiences voltage of 160V RMS or greater. The breaker can be reset and the “TEST” button can be pushed to verify the breaker is working properly.
5 Ground fault. Current has found an alternate path to ground.
6 Self Test Failure. The breaker continually tests the internal electronics and software to ensure the arc fault detection technology is working properly. If the self diagnostics fail, the breaker will trip
