[RE-wrenches] Arc Fault problem in FM100

[Jerry Shafer]

John, Wrenches,
Did you install and wire the FM100, Here is what l have found, wires not
stripped back far enough and the fasteners screwed down hit the insulation
and the wire will arc on the terminal causing an arc fault and shutting
down the CC
Fun times

On Fri, Mar 7, 2025, 8:17 PM John Blittersdorf via RE-wrenches <
re-wrenches at lists.re-wrenches.org> wrote:

> Hello Wrenches,
>     I just fired up a new off grid solar array with the FM100 arc fault
> version.  RIght off I got the
> arc fault/ground fault red light. It was the end of day with 145 V from
> the array but no current.   Question is, if I want to disable the function,
> will simply not passing wires through the current transducer effectively
> defeat the fault. or does the circuit board have to be pulled as well.  I
> have a new FM100 that I bought on Ebay that I just hooked up to my home
> system.  It is dark so I won't know until tomorrow if it is good but at
> least no red light and I simply did not pass wires through the ring. If it
> works tomorrow, is this a reasonable way to leave it wired up. Solar array
> in both cases are pole mounts. I pulled the arc fault circuit board on the
> customer's system but still a fault light.
>
> John Blittersdorf
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