1689CausePrinter detected ink out condition.What to DoReplace the ink tank and close the scanning unit / cover.An ink tank that was once empty is installed.If you want to continue printing, you need to disable the function for detecting the remaining ink level. Todisable this function, touch Stop on the printer for at least 5 seconds, and then release it.With this operation, disabling the function for detecting the remaining ink level is memorized.Please be advised that Canon shall not be liable for any malfunction or trouble caused by using a non-genuine Canon ink tank or by using non-genuine Canon ink.Note• If the function for detecting the remaining ink level is disabled, the ink tank is displayed in white onthe touch screen when the current ink level is checked.568

Canon TR8660 Online Manual