GFCI Trip Issues

If the GFCI Trip feature does not trip the GFCI, but the GFCI is installed properly, verify the following:

Be sure the system box is grounded properly.

On early versions of the Mach III EL Boards, verify there is a jumper on J89 of the System Board. More recent versions of the Mach III Boards do not require verification of this jumper.

For more detail, refer to the Error Code Diagnostics website Here.

Review the "No Power at System Board" topic.
Review the "Check GFCI" topic.
Review the "GFCI Trip Feature" topic.