Quattro Inverting no detecting any ACin entry

Hi all! We are in a installation in Africa with 3 Quattros 48/8000/110 and batteries BYD. The problem we are having is that the quattro is not detecting any ACin entry. In the console appears like disconnected (Acout2 is not open the). We have try with both entries ACin1 and ACin2 with the same resutl. No alert or message is shown in the console. It behaves like no connection in. But we can messure in the Inverter, in the connexions points that 230V is there. Any orientation about the problem? In the console we can see that Acin L1 is alwways 0V and L2 and L3 are fluctuating between 0v and 235V. In thhe widget L1 appears with 0V and the rest, as shown in the pictures, but this mesure is like no real (compare with the one we take with the voltage meter)

Many thanks for any orientation you could offer!!!

Regards,

If AC voltage, frequency etc is outside of thresholds, or grid code settings, the quattro will reject mains.

If you use veconfigure, grid tab, NS log → it will show the reason for disconnect/rejection.

Always a good idea to double check wiring and connections as well.

Are you using the internal metering on the inverter or external?

Thanks Nick for your quick response! We are using the internal meetering. Unfortunatley I have not here the MK3 cable to connect. Only have access to the VRM. What we use is a multimeter to check the entry and even if it is true that L1 has low voltage than L2/L3 (230v vs 234), it should be enough according to the broad limits we have in the configuration.

Anyway, It is clear that we would need a cable :pensive_face:

Thanks!!!

You would need to set the system up to not switch as a group, if you want each phase to switch to mains independently

I personally would check why L1 voltage is low, and why L2+L3 are fluctuating. To me this sounds like a floating/ungrounded neutral point in the mains

Thanks Chrigu!

What we also did is to test with the Generator instead of grid and still same problem with L1 undetected. It seems more a problem with the Quattro. It is ttue that it seems that we don’t have the fluctiation with L2 and L3 in the case of the generator.

We Will have to do as you mention a test as monlfasic to confirm the failure of the inverters.