Confirm that a qualified electrician has verified the facility grounding and input voltage are within specifications, ruling out external wiring issues.
If the CC_a004 error persists after confirming external infrastructure is sound, the internal ground fault monitoring circuit is confirmed as defective.
Contact Tesla Support to initiate a warranty claim or hardware replacement process for the Wall Connector unit.
Ensure a qualified electrician performs the removal of the faulty unit and the installation of the replacement unit according to the official Tesla installation guide.
Comments
Sign in to join the conversation
Sign InNo comments yet. Be the first to share your thoughts!