[RE-wrenches] Outback radian inverter with FM 100 ground fault

[Dana Orzel]

Yes I have 2 FM100s
Dana Orzel
C: 208.721.7003
E- dana at solarwork.com

On Jan 18, 2025, at 7:08 PM, Kirpal Khalsa via RE-wrenches <re-wrenches at lists.re-wrenches.org> wrote:


Dana...
Do you have multiple FM 100s? If so only one should have the GFI fuse.
Broken panel with water getting into glass?
Turn it off and wait 5 min and turn it on.  Usually clears it especially if it's a faulty nuisance trip.
Have had numerous FM 100s give faulty afci errors.  Removing the.afci boards always resolved this issue.  But of course check all you connections leading to and from the cc.
Keep a few extra 1A gfi fuses handy....you may need a couple to test it all out.
Keep us posted.
Good luck
Kirpal


On Sat, Jan 18, 2025, 2:40 PM Dana Orzel via RE-wrenches <re-wrenches at lists.re-wrenches.org<mailto:re-wrenches at lists.re-wrenches.org>> wrote:
Hey, all you wise ones,
37 years in the business and I’ve never had a ground fault ever in any installation I’ve done or my home systems. I went out to my system here an hour ago and one FM 100 is completely turned off claiming ground fault on the mate 3S.
I guess my first question is :

Is this really a ground fault ?

I had removed the ground fault breaker when I upgraded due to space considerations

In my entire time in this business, I’ve never had to deal with the ground fault any suggestions on how I should be tracing this?

Has anybody seen this in an FM 100 when it wasn’t a ground fault?

I do own a megger&  I’ve never had to use it. I only bought it about three months ago cause it seemed like a good idea and I might need to use one someday, Maybe I’m psychic ?
now if I could just figure out how to trace this out.
All suggestions welcome thanks all!

Dana Orzel
C: 208.721.7003
E- dana at solarwork.com<mailto:dana at solarwork.com>
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