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1.4 Display and Buttons
The status of SMART-21 is displayed on the Watchman program of the Windows tray.
The simple status of SMART-21 is displayed by color of LED. It is red when boot up.
It is changed to ‘System Ready’ if the printer is fine. It is change to ‘Printing’ when the printer
is working. In case of sensing an error, it is changed to ‘Error’ status. Whenever the top
cover is opened, the operation is stopped and the status is ‘Top Cover Open’.
Figure 7 Watchman Pop-up