Press and hold the [Stop / Clear] button on the Contorl Panel, press [7] on the numeric keypad, then release both buttons. The Stop / Clear button is the second button from the right in the lower row. The symbol on the button is a circle with an inverted triangle and the letter 'C' above it.

A 3-digit number will be displayed for 4 seconds and then a second
3-digit number will be displayed. The first number displayed is the first half of the total copy count. The second number displayed is the second half. For example, if the first number displayed is 022, and the second number displayed is 474, then the total number of copies the machine has made is 22,474.