Kyocera KM-C1530 - Manual (Page 210)

9 Touch Panel Messages
9-6 KM-C1530
9.2 When the Message “Please add Toner.” Appears
When toner is about to run out, the advance warning message shown
below appears. When the message appears, refill the toner according to
your maintenance agreement.
When the toner is empty, a warning message appears and copies can no
longer be made. For details on refilling the toner, refer to page 9-8.
✎
Note
Do not refill the toner until the message indicating that the toner be
refilled appears on the touch panel. In addition, do not refill the toner
of any color other than the one indicated in the message on the touch
panel.