That was some nice information, Mahesh, which would definitely come in handy. A related query - where or how can we access the logs?
The following information, though a bit off-topic, can come in handy for taking out the maximum number of printouts.
The quantity of color ink is far too less as compared to the black one. So, it gets used up too early. Even if you are not taking out a color print, the color cartridge is constantly being used even in the black printouts. If the users do not need color printouts that frequently then the printer can be used to run on single cartridge mode (black) too. Just remove the used up cartridge (color, in this case) and print on single cartridge (black) mode. Keep a color cartridge in stock and load it when you need a color print. It can be removed after the use and can be reloaded when the need arises again. Just keep the partially used color cartridge in an air tight container such as a zip lock bag to avoid the blocking of ink holes.
Secondly, never print directly from World Doc or any other format than a PDF format, the reason is explained in the #3 below. Try saving every file in PDF format.
Thirdly, use Acrobat DC to take printouts. On the printing option page of Acrobat DC, there are two options towards the top center- a) print in gray scale & b) save ink toner, Just check both the boxes and you will be saving around 20 - 25% of the ink, hence making the black cartridge print more number of printouts. That is if you can do with a lighter printout and do not need jet black printouts, which normally is the case with everybody.
When you talk, you are only repeating what you already know. But if you listen, you may learn something new!