B069-S: BMM nedap start error

These error indicate that the PowerRouter has no connection with the Li-ion battery manger (BMM).

1. To rule out any software errors, the PowerRouter needs the latest official firmware.
2. Verify the data connection between PowerRouter and BMM.
3. Restart the BMM, and then reset the PowerRouter.

If the problem remains:

Cold start the PowerRouter (disconnecting Solar, Grid, Batteries and wait 10min before reconnecting them and starting the PowerRouter).