When the ink level is below the lower
line on an ink tank, you need to refill it.
Before checking the ink level or refilling an ink tank
as described here, be sure to read the ink safety precautions.
Caution:
If the ink level is below the lower line
on the ink tank, fill it to the upper line on the ink tank.
Continued use of the product when the ink level is below the lower
line on the tank could damage the product.