Secure Liberty 100 Technical Reference Manual page 90

An invalid refund UTRN will display any one of the displays shown below followed by the 'key locked' message
which will timeout after 20 seconds and then resumes the default auto-cycle display:
The displays followed by switch UTRN:
A valid switch UTRN from this mode will change the meter's main switch state to READY or Off; if it is already
on then the UTRN will switch it off and vice versa. The UTRN authentication will be followed by any one of the
following displays:
Page 90 of 116 Liberty 100 Smart Electricity Meter Technical Reference Manual
The display 'Rejected' indicates that the refund UTRN
is invalid and will be followed by the reason for
rejection.
Followed by
'Duplicate' indicates UTRN is rejected because a used
UTRN is re-entered.
Or
'Invalid' indicates UTRN is rejected because the UTRN
Or
is not meant for the meter.
'Incorrect' indicates UTRN is rejected because it is a
Or
wrong UTRN.
'Incomplete' indicates UTRN is rejected because it is
not in multiples of 20-digit.
Or
'Account Low' indicates UTRN is rejected because the
vend amount is not sufficient to run the meter.
(timeout 4 secs) Or
The display 'Key Locked' indicates that the user has
entered five (5) consecutive invalid UTRN and this
(timeout 20 secs)
locks key 'A' for the configured timeout period.
The display 'Accepted' indicates that the switch UTRN
is valid and thus changes the meter's main switch state
to on or off depending on its current state.
Or
The display 'Rejected' indicates that the switch UTRN
is invalid and will be followed by the reason for
rejection.
Followed by
'Duplicate' indicates UTRN is rejected because a used
UTRN is re-entered.
Or
'Invalid' indicates UTRN is rejected because the UTRN
Or
is not meant for the meter.
BGX501-767-R02