I have an e-tron 3.6kW charger/EVSE that won't power up. It worked fine until yesterday. I plugged it in and started charging at work, but at the end of the day I went out to discover that the car had not charged much and the EVSE seems to be dead. I was using a 220V circuit, but have also tried plugging it into a 110V circuit with no luck. Is there any reset procedure or anything I should try?