Samsung SL-M4020ND-TAA - Manual (Page 94)

Understanding the status LED
94 4. Troubleshooting
Eco Green
On Eco mode is on (see "Eco printing" on page 49).
Off Eco mode is off.
a. Estimated cartridge life means the expected or estimated toner cartridge life, which indicates the average capacity of print-outs and is designed pursuant to ISO/IEC 19798. The number of pages
may be affected by operating environment, percentage of image area, printing interval, graphics, media and media size. Some amount of toner may remain in the cartridge even when red LED
is on and the printer stops printing.
b. Some LEDs may not be available depending on model or country (see "Control panel overview" on page 22).
c. When the imaging unit has reached its end of life, the machine will stop printing. In this case, you can choose to stop or continue printing from the SyncThru™Web Service (Settings > Machine
Settings > System > Setup > Supplies Management> Imaging Unit Stop) or Samsung Easy Printer Manager (Device Settings > System > Supplies Management > Imaging Unit Stop).
Turning off this option and continuing to print may damage the device’s system.
LED Status Description