CEPS-A GFCI Troubleshooting
If the GFCI on the blue inverter is tripping, there are two things that can
cause this: a crossed neutral (dangerous) or inrush current (not
dangerous). This simple test will help you to determine which it is.
#1) Get an amp/current meter
#2) Measure the red OUTPUT wire coming out of the inverter. Write
down how many amps________
Measure the white/red stripe OUTPUT wire coming out of the inverter.
Write down how many amps_________
#3) The two amp readings should be equal (within 0.1A preferred). If it
is equal and GFCI still strips, proceed to step #4. If it is not equal, there
is a problem with your output neutral wiring. It needs to be a
dedicated neutral wire going out to your lights and cannot touch the
building neutral anywhere. Usually one of the emergency fixtures in
the field has been incorrectly connected to a normal building neutral
wire. As a result, some of your neutral current is returning to your
building neutral instead of your inverter neutral. This is a code issue
and if the imbalance is large enough it can also damage the inverter.
#4) If the currents are balanced please call tech support at 1-800-982-
4587 and reference this troubleshooting guide, they will assist with
next steps.
