Just To Get an AFCI model up and running

Discussion about the FM100 AFCI Charge Controller
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The Electron
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Just To Get an AFCI model up and running

Post by The Electron »

Hello all:) Have 2 new units, firmware 2.0.1 AFCI version, that i need to patch in to replace a couple burnt controllers.

First off, one had a jumper on the (aux) terminals, (the other didn't), the unit with the jumper faulted out with fault for that, removed jumper, now it's happy just booting up (Outback installing those little wire jumpers from the 2nd to the 3rd terminals from the right? How's come? Just curious:)

The CT for AFCI simply generates current if the the PV inputs become imbalanced, correct? So, will the controller work without routing the PV wires thru it? (not routed thru the CT for now due to stiff cold wires that barely reached the terminals, upgrade to bigger yet more flexible wire forthcoming)

Will it work with the BTS unplugged?

Had to install these last night in the dark, they happily connected to the mate3, and i can see them on optics remotely. But the status says they are "Silent" - before i head up there, any settings i am unaware of keeping these chargers asleep?

Tnx much!!
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Re: Just To Get an AFCI model up and running

Post by fcwlp »

The Electron wrote: Tue May 09, 2023 2:06 pm The CT for AFCI simply generates current if the the PV inputs become imbalanced, correct? So, will the controller work without routing the PV wires thru it? (not routed thru the CT for now due to stiff cold wires that barely reached the terminals, upgrade to bigger yet more flexible wire forthcoming)
The coil is attached to chassis with a zip tie that you are supposed to cut. Should be easy to reposition even with short wires.
The Electron wrote: Tue May 09, 2023 2:06 pm Will it work with the BTS unplugged?
No issue with BTS unplugged
.
Your profile sounds like some of my customers. :eek:
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Re: Just To Get an AFCI model up and running

Post by JRKsolar »

Unit will work without wires through the donut, but won't have at afci function. If you can get one wire through it'll work with lower sensitivity. If you use both wires, check the manual because they have to go through in opposite directions.
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Re: Just To Get an AFCI model up and running

Post by EA6LE-ONE »

The Electron wrote: Tue May 09, 2023 2:06 pm Hello all:) Have 2 new units, firmware 2.0.1 AFCI version, that i need to patch in to replace a couple burnt controllers.

First off, one had a jumper on the (aux) terminals, (the other didn't), the unit with the jumper faulted out with fault for that, removed jumper, now it's happy just booting up (Outback installing those little wire jumpers from the 2nd to the 3rd terminals from the right? How's come? Just curious:)

The CT for AFCI simply generates current if the the PV inputs become imbalanced, correct? So, will the controller work without routing the PV wires thru it? (not routed thru the CT for now due to stiff cold wires that barely reached the terminals, upgrade to bigger yet more flexible wire forthcoming)

Will it work with the BTS unplugged?

Had to install these last night in the dark, they happily connected to the mate3, and i can see them on optics remotely. But the status says they are "Silent" - before i head up there, any settings i am unaware of keeping these chargers asleep?

Tnx much!!
The jumper between 2 and 3 is needed for the CC to function. is removed if you have OutBack Power RSI or another protection system. all CC should come with a jumper between 2 and 3, i had one that came without, just installed a jumper and was working fine.
The Electron
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Location: Northwest Montana

Re: Just To Get an AFCI model up and running

Post by The Electron »

Thanks Eagle, strangely the one with the jumper was the one registered a fault, removed it, fault cleared, so not sure why that was occuring, but will def try that next trip up there!

Anyone run into this before?
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EA6LE-ONE
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78 x PANASONIC VBHN325SA17 325W

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Re: Just To Get an AFCI model up and running

Post by EA6LE-ONE »

The Electron wrote: Fri May 12, 2023 7:01 am Thanks Eagle, strangely the one with the jumper was the one registered a fault, removed it, fault cleared, so not sure why that was occuring, but will def try that next trip up there!

Anyone run into this before?
Be sure the each CC has its own PV array, you can't connect 2 CCs on the same array.
I don't have the FM100 with AFCI. Read the manual how multiple CCs should be installed. I think only one FM100 should have the GFDI fuse installed. I don't see any use for CTs with the FM100afci in the manual.
The Electron
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Re: Just To Get an AFCI model up and running

Post by The Electron »

Oh, they def have their own arrays. Some inconsistency with that jumper for sure, any info OB? I'll hit the book tonite, on a road trip, tnx much guys
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Re: Just To Get an AFCI model up and running

Post by raysun »

I don't see any use for CTs with the FM100afci in the manual.
Is it possible the "CT" is an RF sensor for the AFCI function? Most arc fault detectors are actually detecting low frequency AM RF emitted by the arc and impressed on the conductors.
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EA6LE-ONE
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My RE system: System 1:
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6 x FLEXmax 100, HUB10,
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1 x FLEXnet DC, 6 x FLEXware ICS Plus,
78 x PANASONIC VBHN325SA17 325W

System 2:
MATE3s, Radian GS8048A,
2 x FLEXmax 100, HUB10
1 x EnergyCell 48V 2700RE,
1 x FLEXnet DC, 2 x FLEXware ICS
21 x PANASONIC VBHN325SA17 325W
Location: Providenciales, Turks & Caicos Isl.

Re: Just To Get an AFCI model up and running

Post by EA6LE-ONE »

raysun wrote: Fri May 12, 2023 11:57 am
I don't see any use for CTs with the FM100afci in the manual.
Is it possible the "CT" is an RF sensor for the AFCI function? Most arc fault detectors are actually detecting low frequency AM RF emitted by the arc and impressed on the conductors.
There is a sensing coil inside the FM100AFCI. no other external sensor.

From the manual:
"The AFCI function requires the PV wires to pass through the sensing coil. The AFCI function performs optimally with positive and negative wires inserted in opposite directions through the coil. If only one wire fits, it should be the non-grounded conductor. "
raysun
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2 Midnite Solar MNPV6 combiners w/20A DC disconnects.
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Re: Just To Get an AFCI model up and running

Post by raysun »

Thanks for the clarification.
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