Tesla MODEL S 2021 - Troubleshooting Alerts (continued); (UMC_a015) Wall plug adapter error - Charge rate reduced; (UMC_a017) Charge rate reduced - Wall plug temperature high

• If you find excessive moisture, wait and let both the inside area of the charge port and the exposed portion of the
charge handle dry suciently before trying again.
Inspect the charge equipment for damage.
• If the cable is in any way damaged or deteriorated, do not use it. Try dierent charging equipment instead.
•
If the cable is in good condition, try charging again with the same Mobile Connector.
If the issue persists and prevents charging, try charging with dierent charging equipment.
As this alert is usually specific to external charging equipment and power sources, and it does not typically indicate
an issue with your vehicle that can be resolved by scheduling service, it is recommended that you:
•
Try charging with multiple, dierent types of charging equipment.
You can also try charging your vehicle using a Tesla Supercharger or Destination Charging location, all of which can
be located through the map on your vehicle's touchscreen display. See Maps and Navigation on page 131 for more
details. Additional third-party charging stations may also be available in your area to help you to pinpoint the issue.
For more information on troubleshooting Mobile Connector status lights and charging issues, refer to the product's
owner's manual.
(UMC_a004)
Unable to charge with Mobile Connector
Voltage too high / Try a dierent wall outlet
The vehicle cannot charge, or charging is interrupted, because either the Mobile Connector:
•
Detects the wall outlet voltage is too high.
OR
•
Detects an unexpected increase in supply voltage from the wall outlet.
Try charging the vehicle with a dierent wall outlet.
If the vehicle starts to charge, the issue was likely with the original wall outlet. It is recommended that you contact
an electrician to inspect the building wiring connection to that outlet.
If the vehicle still does not charge when you try a dierent wall outlet, try charging at a dierent location.
As this alert is usually specific to external charging equipment and power sources, and it does not typically indicate
an issue with your vehicle that can be resolved by scheduling service, it is recommended that you:
•
Try charging with dierent wall outlets.
•
Try charging with dierent charging equipment.
You can also try charging your vehicle using a Tesla Supercharger or Destination Charging location, all of which can
be located through the map on your vehicle's touchscreen display. See Maps and Navigation on page 131 for more
details. Additional third-party charging stations may also be available in your area to help you to pinpoint the issue.
For more information on troubleshooting Mobile Connector status lights and charging issues, refer to the product's
owner's manual.
Troubleshooting Alerts
246 MODEL S Owner's Manual