XW6048 -F39 : AI Under Voltage

fca1 · December 2014

Hi there my grid this winter is getting a strange behavior in peak times i mean got several times my voltage dropping bellow 198V (i'm in europe it should be 220v).

When this happen my xw trigger a fault:

Local Time: 2014/12/04 06:48:06
Device Name: XW6048
Firmware Version: V01.07.00-0005
FGA #: 865-1035
Fault Detail:
F39 : AI Under Voltage
Cause: Under-voltage anti-islanding. Solution: No action required. The inverter stops selling and disconnects from the grid. When the fault clears, a five-minute timer begins counting down. The inverter does not sell again until grid voltage and frequency are within range for five minutes.

I don't want to keep receiving these alerts/emails and so i changed in the AC1 settings "AC1 Low Voltage " to 192V, but it doesn't seem to change this fault from appear.

Its possible to change the value that triiger this fault from 198v ? if yes where ?

PS: yes i will open a claim in the grid supplier as the 196v is to low for what they should supply, i guess that if didn't have the xw on the middle my house lights and appliances would fail

BB. · December 2014

Re: XW6048 -F39 : AI Under Voltage

I don't think you have any problem with your Inverter/Solar RE power system.

It is the AC mains falling out of nominal specifications. And the XW is supposed to disconnect at that point (protect linemen from getting shocked and/or your system powering the neighborhood).

Assuming you are using lots of electric heat? If so, you should go around with a volt meter and make sure that the input to your main panel (from the meter) is either low (not your problem) or if nominal, then you may have a bad electrical connection in your home (I have had water leaks get into electrical panels/boxes and cause corrosion at breaker/fuse connections, wire nuts, etc.).

If you can go to a friendly neighbor and measure their voltage--That would probably confirm a utility problem if their voltage is low too.

-Bill

fca1 · December 2014

Re: XW6048 -F39 : AI Under Voltage

Hi Thanks
I know its not "real " xw6048 problem. When i have these low voltages I measured it on the main panel and it confirms .

Even that I have my ac units direct to the main panel before the xw this never happened before .
Will try the neighbor test .

t00ls · June 23

I am having the same problem with my NA XW pro 6848
all connections are tight, voltages are good, I cant find the problem....there are other codes also

I am connected to the grid,but not selling, I have solar which I use to keep batteries charged and do self consumption, which lowers my bill

my firmware version is 2.04

Dave Angelini · June 23

You did XWP commissioning right? Set grid code et al.

t00ls · June 24

I was trying to use the old config tool, but after reading a lot more, evidently the gateway and insight home gateway have more functionality than it

I didnt want to have to get another piece of tech for this....but I just ordered one on sale at us solar...$145....so

let me see what happens after that...I'll update

maybe in another 5 years I will have to buy the boost schneider home thing LOL...ahhh aint tech grand

Dave Angelini · June 24

Download the commissioning guide! XWP has to have insight local to commission! The grid codes need to be set especially if you have the grid😉 You should find out what your utility wants also!
Usually the California grid code will be fine.

Since you said you are not selling, have you tried just wiring the grid into AC2?

XW6048 -F39 : AI Under Voltage

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