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Tesla Wall Connector Gen 3 Flashing Red Light Fault Troubleshoot
Power supply issue, charging disabled. Verify that the power supply is turned on. If the issue persists, have an electrician remove the Wall Connector from the wirebox and confirm that voltage is present at the terminal block using a multimeter. Record the voltage readings for the following: L1 to L2/N, L1 to Ground, L2/N to Ground. Solid Red Internal fault, charging disabled Turn the circuit breaker off, wait 5 seconds, and turn it back on. If solid red light remains, document part number and serial number, then contact Tesla.
One (1) red blink:
Ground fault circuit interruption due to unsafe current path, charging disabled Inspect the handle, cable, Wall Connector, and vehicle charge port for damage or signs of water ingress. Have an electrician check that earth ground is not directly connected to a conductor wire in the branch circuit.
Two (2) red blinks:
Ground assurance fault, high ground resistance detected, charging disabled Verify that the Wall Connector is properly grounded. The Ground connection must be bonded in the upstream power supply for proper operation. Check all physical connections, including the wire box terminals, electrical panel(s), and junction boxes. In residential power supplies, check the bond between Ground and neutral at the main panel. If connected to a stepdown transformer, contact the transformer’s manufacturer for direction on how to bond the ground connection.
Three (3) red blinks:
High temperature detected; charging limited or disabled Check the faceplate and cable handle for excessive warmth. Have an electrician remove the Wall Connector from the wire box and verify that the conductors used are sized correctly and that the terminal block is torqued to specification.
Four (4) red blinks:
Internet connection lost, online features disabled Check for objects that could interfere with the area’s Wi-Fi signal strength. Confirm that the local Wi-Fi router is operational. If the Wi-Fi password was changed recently, follow the commissioning process on your mobile device to update the Wi-Fi settings.
Five (5) red blinks:
Power-sharing communication issue, charging reduced Check for objects that could interfere with the area’s Wi-Fi signal strength. Follow the commissioning process on your mobile device to re-link the Wall Connectors for power-sharing.
Six (6) red blinks:
Overvoltage or poor grid quality detected, charging disabled Verify that the power supply is nominal 200-240 volts. If the issue persists, have an electrician remove the Wall Connector from the wire box and confirm that voltage readings are as expected at the terminal block using a multimeter. Record the voltage readings for the following: L1 to L2/N, L1 to Ground, L2/N to Ground.
Seven (7) red blinks:
Vehicle overcurrent detected Reduce the vehicle’s charge current setting. If the issue persists and the attached vehicle is manufactured by Tesla, record the vehicle’s VIN and approximate time of the fault and contact Tesla. If the vehicle is not manufactured by Tesla, contact the vehicle’s manufacturer.