Troubleshooting
3-3
Other errors
The following errors occur as a result of a potential equipment failure or utility failure.
FAULT
RELAY STUCK OPEN / FOR ASSISTANCE CALL ...
Cause/Other Symptoms: When attempting to charge a vehicle, this message will be displayed if the
relay is stuck open. When the relay is stuck open, the charging station can not provide power and
therefore you can not charge a vehicle.
Solution/Action: Restart the charging session by momentarily returning the charging connector to its
holster. If the message continues to be displayed, press and hold the STOP button for 10 seconds to
reboot the CT500. If the message is still displayed, call Coulomb Customer Support at
1-888-758-4389.
FAULT
RELAY STUCK CLOSED / FOR ASSISTANCE CALL ...
Cause/Other Symptoms: When attempting to end a charging session, this message will be displayed if
the relay is stuck closed. A new charging session can not be started until this error is resolved.
Solution/Action: Restart the charging session by momentarily returning the charging connector to its
holster. If the message continues to be displayed, press and hold the STOP button for 10 seconds to
reboot the CT500. If the message is still displayed, call Coulomb Customer Support at
1-888-758-4389.
