My e-tron is 3 days old and I just had a 240V outlet installed. When I plug in the Audi home charger directly into outlet, the control unit goes all red which according to the manual means: "The charging infrastructure of the power supply/household connection is insufficient: the ground conductor is interrupted or not present. Have the control unit checked by dealer and have the power supply checked by electrician." The dealer gave me a new control unit to try, same problem. The electrician confirms that it is grounded. But he also noted that power coming into the house is 210 not 240. Has anyone experience ALL RED errors on charging control unit? Thanks!