The franking machine warns when the postage in the machine reaches a certain amount. This Low Funds Warning acts as a reminder to add more postage to the franking machine. The funds value at which the franking machine displays a warning can be customized.
To set or change the Low Funds Warning value on your franking machine:
Press the Options key.
Select "Setup".
Select "Postage Limits".
Select "Low Funds".
Enter the desired amount (the funds value below which the franking machine will give a warning).