Cracks in wallbox pulsar plus front cover

Going to revive my old post about the wallbox as it suddenly started giving trouble. Copied my post from fb:

I have an almost 5 yo wallbox pulsar plus which worked flawlessly until Friday night /Sat morning (15 to 16 of May). It tripped the breaker 2h into charging. I was able to power it up once in the morning (only after isolating it from the mains power). Then I tried to charge the car, but it tripped again a few seconds. Now even if I reset the breaker and energised it I get an instant trip of the breaker (its hager in case someone asks). No visible damage on the MB inside, but definitely a distinct burned smell on the right hand side of the charger. I filled in a contact form on the wallbox website but the charger is almost 5 yo and the warranty is 3 years so no luck there. I feel that I might be in for an expensive birthday present next week.

UPDATE over w/e: While opening the charger the 2nd time the cover has craked and chipped a piece off. It started showing signs of sun damage again 2 years after i replaced it under warranty. The charger started working again just before i went to bed on Saturday and i managed to charge the car overnight w/o issues (i though i had some overloading issues so charged at 30A). But during sunday afternoon the RCBO tripped again when the charger was idling and not connected to the car. What I have noticed yesterday when I tried to reset the rcbo was that the earth fault indicator was on (see photo below). I didnt pay too much attention to it on Saturday. I just isolated the mains power to the charger and rcbo then reset. Now the fault indicator is back on again. A wiring problem somewhere? Can't re-energize the charger once again, instant trip of the RCBO witht the earth fault indication. Probably time to start looking for a local spark to have a look at the wiring. Also the smell i mentiomed earlier could've come from some high voltage component inside the charger as i see no physical damage on any of the components. And the rust around the ring at the mains cables was there 3 years ago (see previous photos in the post).

UPDATE Monday: Wallbox came to with questions about the rcbo and the timing of tripping events. They're also asking for photos of the charger itself so I'm expecting the conversation going about the chipped cover which only appeared after I tried to open the charger after it stopped working.