[RE-wrenches] Arc Fault problem in FM100

[Dana Orzel]

It’s the same fuse as in a Flluke 87 😎
Dana Orzel - dana at solarwork.com - 208.721.7003

On Mar 12, 2025, at 8:13 PM, John Blittersdorf via RE-wrenches <re-wrenches at lists.re-wrenches.org> wrote:


Dana, I'm the one feeling like an idiot.  Turns out the ground fault fuse was blown in a brand new controller.  I did't have my
meter with me to test the fuse and had to go back the next day.  I had a good fuse in the 2nd controller not yet hooked up so
I could have borrowed that one and had the system up and running. Only cost me 4 hours of drive time by not having my meter.

John Blittersdorf


On Sat, Mar 8, 2025 at 11:32 AM Dana Orzel via RE-wrenches <re-wrenches at lists.re-wrenches.org<mailto:re-wrenches at lists.re-wrenches.org>> wrote:
Pull the ground jumper in the FM100.
Double check all terminal connections in the Power center related to the FM100. Do the pull test carefully,
I once missed tightening a neutral that was passing current & then not. I finally heard a slight crackle sound as I turned the array input & battery breaker at the same time to on, did the pull test [moved wires & the Fm100 lite up], then Felt like an idiot! Tightened the neutral & all good.

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