There are chips on the end of each cartridge which have a 'memory' of how much ink you have used. Printers also have a 'memory' of your usage. These memory systems assume you've run out of ink when you have consumed a certain amount. They don't realise that you have a large external tank feeding your cartridges. So after some time you'll get a message on your PC screen telling you to replace your cartridges. Check your ink level in the external tanks. Most likely there will still be a ink in these tanks. If this is the case, you'll need to reset the chips using the little White/Black reset button on the cartridge. Simply press and hold the white reset button on the cartridge for 3-4 seconds. when cartridges are in the change position.
Please see video below:
Please Note: Just shape of the tank is different.
Warning : Never rise the external tank higher than your printer (even temporarily)!
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