After reviewing your order history, I see you purchased R3000 refillable carts individually between Jan and April of this year, which was during our transition period of moving from battery to non-battery style chips.
I see your PK, C, VLM and LLK carts have the battery style chips, and others (LC, LK, VM, Y and MK) have the current NON-battery chips attached.
Did you print full sheets of pure channel flush images, or 8-channel flush to work on all at once? If all at once, about how many and what size black flush images did you print?
Did you remove the cartridge at all after filling and installing it for the first time?
Are you certain the cartridge was totally full to start with?
The printer can not detect cartridge levels, other than reading the chip, so it's important to totally fill a new cartridge so the physical ink level matches the chip read level, and reset the chip when a cartridge is refilled. As per our instructions, the five carts with non-battery style chips will automatically reset when they read empty in the printer, and removed, refilled + reinstalled (removing + reinserting a cart that reads empty will tell the printer a new/full cart in installed, so it must be refilled at this point, or the cartridge will run dry). The first four carts with battery chips can be manually reset whenever you feel like refilling the carts.
To purge air from your ink lines, and refill the line with ink, you will need to refill the cartridge and make sure the exit chamber is correctly filled for proper ink flow. After reinstalling the refilled cart, print black flush images thru QTR calibration mode or do an Initial Fill thru the Adjustment Program (but make sure all other carts have enough ink/flush first).
I hope this helps.
Best regards~ Dana