Maybe this can help you?
12v battery is at a too low a voltage.
check that first needs to above 12.2- 12.4v for it to charge. Common fault.
I tried to do everything but still not working, I took the car to the dealership they don’t know what’s the problem, and they tell maybe the big battery, it will cost me around 6190 euro !!!
That’s exactly wat iI saw the day my charger died. 12V batery is fine and the traction batery seems ok said mr. Renault. It will set me back a litle over 1000 euro if the failing charger did not do more evil.
Charger is still in back order, by the way, exactly for one week now.
God luck with your repair!
I know that this is difficult, but You need to get the CAN communication. If You send me the CAN Frames I can answer what is wrong
How can i do that , can you tell me how i will send you