You can continue to use the product even if one or more ink tanks are not filled all the way. However, for the most accurate ink level monitoring, fill all the ink tanks up to the top line. For optimum printing results, refill the ink tanks to the upper line at least once a year.
Visually check the ink levels in the product’s ink tanks to confirm the actual ink levels. Continued use of the product when the ink is expended could damage the product.