Tesla MODEL X Owner's Manual page 238

Troubleshooting Alerts
A communication error occurred between the Wall
Connector and the vehicle.
What to do:
Try again by disconnecting the Wall Connector from the
vehicle and reconnecting. If possible, plug the vehicle
into another Wall Connector or a Mobile Connector to
determine if the vehicle is able to communicate with
other charging equipment. If the problem persists,
contact Tesla.
(CC_f020)
Unable to charge - Wall Connector
issue
Wall Connector needs service
What this alert means:
Wall Connector hardware issue. Possible issues include:
1. Contactor not working
2. Self-test of internal ground fault monitoring circuit
failed
3. Thermal sensor disconnected
4. Other hardware component issues
What to do:
An internal issue was detected by the Wall Connector.
1. Try charging again by disconnecting the Wall
Connector from the vehicle and reconnecting.
2. If the issue persists, turn OFF the circuit breaker for
the Wall Connector, wait 10 seconds, and turn the
circuit breaker ON again. Then try reconnecting the
Wall Connector to the vehicle.
3. If the issue persists, check for loose connections.
a. Make sure there is no power to the Wall
Connector.
b. Remove the face plate and inspect the wiring
terminals for any loose connections.
c. Contact an electrician if necessary to make sure
all wires are properly connected and torqued
according to the instructions in the Wall
Connector Installation Manual.
4. Once all connections have been checked and made
secure, restore power to the Wall Connector and try
charging again by reconnecting to the vehicle.
5. If the issue persists, the Wall Connector needs
service. Schedule a service appointment through
your Mobile App.
236 MODEL X Owner's Manual