How to replace the socket:
Open the service door.
Disconnect the charger's power from the panel board feeding the charger.
Unscrew the screws that are holding the socket against the metal plate (4 pcs.).
Detach the pipe just by pulling it out after you have cut the cable ties.
Disconnect OUT L1, L2, L3, N and PE cables from the charge controller.
Slide the CT-ring out.
Detach the CP and PR wires (white and red).
Detach 2 pcs. of blue wires. (check the order of the colors, the other one has yellow stripe (lower) and the other one has green stripe (upper)).
Detach emergency opener wires (2 pcs.) pin 9 and 10. (check the order of the colors, the other one has brown stripe (lower) and the other one has red stripe (upper))
Then you can pull out the whole socket and replace with a new one.