I have an EVSE version without a display.
When I connected the device temporally with a power cord, the system worked fine. The car started to charge.
Now I installed in a permanent box (with thick cable from the power distribution box), it does not work.
When I apply power to the board, within a couple of seconds I hear and see the contactor to briefly switch on and off (that is the test of the return power to the EVSE board). After that I connect the car, and nothing happens.
When I force the contact manually to apply power to the car, the red light goes on the car, meaning error.
I tried it with an Audi e-tron and a Volvo V60. Both do not charge.
What kind of troubleshooting can I do? I do have a USB programmer. I bought it to reprogram the EVSE to use 16A.
I also have a oscilloscope (Fluke 123), if needed.
I have version EVSE version 4.