EG4-6000XP W001 AFCI communication fault - what does it mean ? Won't clear.

[EPicTony]

I can't seem to get rid of this AFCI communication fault and therfore always have this: which is annoying.

Any info as to what it is and why I can't get it to go away ? I have restarted the inverter a few times without success.
Thanks

 

[Bananaman321]

I can't seem to get rid of this AFCI communication fault and therfore always have this: View attachment 247516which is annoying.

Any info as to what it is and why I can't get it to go away ? I have restarted the inverter a few times without success.
Thanks

Recheck all your connections you may actually have to take some of them apart wire brush them apply some no ox inhibitor and then reassemble and torque them to spec.

This detects an arc waveform which means you have a fault in your system somewhere most likely in your electrical connections,

 

[EPicTony]

Recheck all your connections you may actually have to take some of them apart wire brush them apply some no ox inhibitor and then reassemble and torque them to spec.

This detects an arc waveform which means you have a fault in your system somewhere most likely in your electrical connections,

Checked and torqued the battery connections yesterday. Are you referring to PV connections or something else ?

 

[Bananaman321]

Checked and torqued the battery connections yesterday. Are you referring to PV connections or something else ?

If you discover any connections that were arching at one point and possibly corrected this by retorking the connection they need to be taken apart and cleaned before assembling and retorking you can also disable our fault protection in the inverter menu.

However this does not resolve any issues just prevents the inverter from looking for problems. (ark faults)

 

[TM48]

I'm not sure what a AFCI Com fault is but it definitely is on the PV. If you're sure everything is OK with your panels and wiring you could turn off the Arc fault until you get word from EG4

 

[EPicTony]

I'm not sure what a AFCI Com fault is but it definitely is on the PV. If you're sure everything is OK with your panels and wiring you could turn off the Arc fault until you get word from EG4

Turned off the arc fault enable and pressed clear arc fault, wala the arc fault is gone and I have a solid green light on the inverter for the first time.

 

[TM48]

Turned off the arc fault enable and pressed clear arc fault, wala the arc fault is gone and I have a solid green light on the inverter for the first time.

Just be sure everything is OK with your wiring/panels.

 

[wpns]

Turned off the arc fault enable and pressed clear arc fault, wala the arc fault is gone and I have a solid green light on the inverter for the first time.

I'd think it would be "the inverter can't communicate with the Arc Fault Subsystem", but if you disable that function then it doesn't throw an error.

in fact, looking over my code, there are separate warning bits for:
"AFCI communication failure",
"AFCI High",
So it's probably the former.

 

[EG4TechSolutionsTeam]

These would be the first steps to take if you had these warnings.



We are currently looking into this for you.

 

[EPicTony]

I only get the 01 AFCI com failure, restarted inverter many times but it won't clear. Disable the arc fault is the only way to get rid of it.

 

[TM48]

Hopefully it's just a software issue and your inverter doesn't have a problem. BTW what rev are you on?

 

[EPicTony]

Hopefully it's just a software issue and your inverter doesn't have a problem. BTW what rev are you on?

ccaa-190D0E and it's been reflashed by tech support. I do have a spare inverter that I could try but I want to hear back from tech support first.

 

[TM48]

I'm running the same firmware but my AFCI has been off.

 

[EPicTony]

I'm running the same firmware but my AFCI has been off.

Why is it off ? Is there a good reason to turn it on ? I have 3 inverters in parallel, 2 are fine and 1 has the afci issue.

 

[TM48]

I'm not sure. It was either never on or was turned off when I upgraded the firmware initially. After reading your initial thread I checked and saw it was off. I left it that way. If your resolution is software I may do the same. I have two in parallel.

 

[Tripplett]

These would be the first steps to take if you had these warnings.

View attachment 247740

We are currently looking into this for you.

I’m having this now too. Started a few months ago and I’ve reset the router a few times. It goes away for a while then comes back.

Single 6000XP (firmware ccaa-190D0E),
2 LL batteries,
eight 545w bifacial panels.

 

[EG4TechSolutionsTeam]

I recommend making sure that all neutral and ground connections are properly torqued. Also, how is the system grounded?

 

[Tripplett]

I recommend making sure that all neutral and ground connections are properly torqued. Also, how is the system grounded?

I’ll check all that again tomorrow, but this is a AFCI communications fault, not an AFCI fault. System was fine for 6 months before the communication errors started. All connections were torqued in Feb 2024.

Inverter and sub panel are both grounded to the main panel that is 2 foot away from them. That is grounded to the house’s ground rods.

 

[TM48]

Any correlation to firmware upgrades in the last 6 months?

 

[EG4TechSolutionsTeam]

Also, check the connection to the communication board for the AFCI module. It should be located at the top right of the board, with a label reading "AFCI" beneath the port.

 

[Brian-CC]

So was this resolved....? I have a customer with same issue. I don't see any other reply's after this last post. It seems like more of a communication error and not a physical error. Inverter is up to date on the firmware. Connection or AFCI have been checked for solid connection along with PV connections checked.

 

[Joq]

I have the same issue

 

[Joq]

I have the same issue. Out of my two paralleled units, one keeps showing this problem. The only way I can stop it is by disabling PV Arc Fault. I believe this is a hardware issue.

 

[ncgat]

I'm having the same issue. Has anyone found a resolution to this?

 

[wpns]

I'm having the same issue. Has anyone found a resolution to this?

Other than disabling the too-sensitive sensor? Even the mfr stopped looking.