Switch the unit off. Physically disconnect all AC inputs and Outputs. Switch it back on.
If the problem persists, it is damaged. If it does not then:-
Get a GX device and use that for further system monitoring. It is so much easier than dealing with codes, it shows on screen in plaon language and you can see if you are overloading as well as monitoring the battery.
GX device is a system controller that can be set up to give you internet reporting via Victron's VRM web site. Look up/download the manual for Victron Cerbo GX or colour control GX. You'll need a data connection on site, of course.
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