Ink warning on canon mx394 printer

SOURCE: Generic ink problem Canon mp530 printer

The solution is to press the button with the button with the triangle on it for five seconds (the reset button? I can't remember off the top of my head, but one of the main buttons). It switches off the warning system and the gauging system. The plus side is that you can reuse the cartridges indefinitely even if it has a chip in it, the downside is that the computer/printer will no longer tell you what level your ink is at.

SOURCE: Having reset ink tank warning block. The

OK.... The canon print head is a very very delicate thing. The smaller canon printers are often referred to as DIPOSABLE printers.
The head of your printer has RETIRED. It can be replaced but at almost (if not more) the price of a new exact canon printer. Answer therefore is.... A new Printer would be your solution

SOURCE: Printer shows warning

plz check the website http://www.fixyourownprinter.com/forums/inkjet/50418#1

SOURCE: low ink warning

In short, yes. The way printers often track ink levels is by counting the number of pages printed so you have to reset this when you put in a new cartridge. As canon uses a number of cartridges be sure to do this only for the one replaced. You will get more functionality when this is done via the computer software for printing but as you don't say which O/S you are using I cannot give details.