PRODUCT OVERVIEW Ground Fault Circuit Interruption Integrated ground fault circuit interruption (GFCI) protection automatically detects a current mismatch between power delivery conductors that would indicate that current is flowing through the ground (PE) conductor. If a ground fault occurs after 10 seconds of charging, Wall Connector will wait 15 minutes before automatically re-attempting to charge. Up to four attempts to charge will be made before user interaction is required. If a residual current fault occurs within 10 seconds of charging, Wall Connector will lock out and user interaction is required to restore charging functionality. Recommended interaction includes pressing the button on the charging handle, or removing the charging handle from the vehicle and reinserting it. If this does not resolve the issue, look for a ground fault issue such as water ingress. Ground Assurance Wall Connector continuously checks for the presence of a safe ground connection and automatically recovers from faults. Ground assurance operates by injecting a small amount of current into the ground conductor in order to measure the impedance between line and ground. If high impedance is detected, the Wall Connector will lock out charging and display a fault code of two (2) red blinks. See Fault Codes on page 27 for a full list of fault codes. One leg of the distribution transformer must be ground-bonded (Neutral) for the ground assurance detection to function properly. Residential power supplies typically bond ground to neutral at the main electrical panel, while commercial sites must provide a ground bond at the transformer. Ground bond should only occur at one location in a site's electrical system. Wall Connector ground assurance does not support an IT grid configuration. Temporary problems such as ground faults or utility power surges are resolved automatically. Power Outages If there is a power outage while Wall Connector is charging a vehicle, charging will automatically resume within 1 to 3 minutes after power restoration. The Wall Connector will display a solid blue light on the faceplate to indicate that it is communicating with the vehicle and waiting to resume charging. Alternatively, pressing the button on the charging handle after power restoration will cause Wall Connector to resume charging immediately. Firmware Updates Firmware updates will be automatically applied to the Wall Connector to improve the user experience and introduce new features. Connect Wall Connector to Wi-Fi for access to the most recent firmware update. See Commissioning Procedure on page 22. Tesla vehicles can provide firmware updates to Wall Connectors. 8 Gen 3 Wall Connector Manual