This is displayed when there is an invalid token and occurs when authentication fails.
The following could be the reasons why the token is invalid:
- The Meter serial number on the token does not match the physical Meter number on the Meter.
- The tariff index on the token is not the same as the tariff index programmed in to the Meter.
- The supply group code that the token was made on differs from the supply group code in the Meter.
- The token was entered into Meter incorrectly.
- The key revision number of the token differs to the key revision as programmed in the Meter.