Tesla Gen 3 Wall Connector, Manual, Page: 29 / 35

Fault Codes
All red blink codes pause for one second, and then repeat.
Lights What It Means Details
No lights 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 wirebox 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 step-
down 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
wirebox 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 wirebox 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.
WALL CONNECTOR LEDS
27 Gen 3 Wall Connector Manual