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You need to clean your waste ink i think.
For troubleshooting purposes, please perform the following: 1. Open the printer and remove all ink tanks. 2. Insert a single ink tank in the printer then close the cover. 3. Confirm whether the printer recognizes the installed tank properly. If it does, it will indicate it does not detect the other ink tanks, as they are not currently installed in the printer. 4. Repeat steps 1-3 with another ink tank. 5. If the printer at any time indicates two of the same ink tanks are installed, the cause will be the last tank installed. For example, if you inserted an ink tank earlier, and you later inserted another ink tank, and it said two of the same inks were installed, the cause of the issue is the last ink tank.
Error U071 : More than one ink tank of the following color is installed. U071.
Action : Confirm that the ink tanks are installed in the appropriate positions.
The machine will not print if the wrong type of ink tank is used, or if it is installed in the incorrect position.
Be sure to install the ink tanks in the correct order. The proper arrangement from the left is Black (CLI-8BK), Black (PGI-5BK), Yellow (CLI-8Y), Magenta (CLI-8M), Cyan (CLI-8C).
Replacing the five ink tanks (cyan, yellow, magenta, black dye, and black pigment) is a simple task. The top of the printer flips up to reveal the ink tanks and the printheads, and by flipping a lever, you can pull out each tank individually. Being able to replace individual tanks is a boon, as you won't waste colors you use less frequently. Also, you won't need separate photo ink to print photos, which we appreciate. Canon ships the Pixma MP830 with full ink tanks. Replacement color and dye-based black ink tanks cost $14.25 apiece, while the pigment-based black ink tank costs $16.25. Canon estimates the cost per page for both black text and color text to be an inexpensive 2 cents.
Have you checked the ink tanks to verify that they are OK. If 1 of them is empty that could trigger the messages. Look in the user's guide starting at pg 161 for a list of messages. let me know if you need any further assistance. i've pasted the user's guide address link just in case you don't have it.
New Page 1
More Than One of the Same Ink Tank is Installed
installing or replacing an ink tank, only one of the following ink
tanks should be installed. If the ink tank is not installed correctly,
an error message will display.
Confirm that the printer is powered on and press the Open button. (The paper output tray will open.)
Lift the scanning unit (printer cover) completely. (The print head will move to the replacement position.)
When the scanning unit (printer cover) is opened more than ten minutes,
the print head moves to the right side. If this occurs, close the
scanning unit (printer cover), and open it again.
Open the inner cover.
on the tab to release the ink tank, then remove it from its slot. If
you are replacing multiple ink tanks, make sure to replace one by one.
Insert the ink tanks into the print head. Note: Press the mark "PUSH" on the ink tank firmly until you hear a click.
Ensure that all the ink tanks are installed properly and the ink tank lamps light red.
<7> The ink tanks are installed properly.
<8> The ink tanks are not installed properly.
Note: Ink Tank LampYou can check the status of each ink tank according to the way its lamp flashes.
- On: The printer is ready to print.
- Slow flashing (at about three second interval): Ink is low. Prepare a new ink tank.
- Fast flashing (at about one second interval): Ink tank is empty, or the printer is not ready due to an error.
- Off: An error has occurred and the printer is not ready to print.
Close the inner cover and the scanning unit (printer cover). Note:
When closing the scanning unit (printer cover), be careful not to jam your finger.
When starting printing next time, the print head cleaning launches automatically.