I’m in the process of flushing an Epson 9900 to prep it for Piezography. The printer was giving perfect nozzle checks with OEM inks. Nozzle checks after the first Init. Fill looked perfect as well, but some color was still visible in the nozzle check, so I ran a second Init. Fill after letting the printer sit for a few days. All traces of the OEM ink seem to have been cleared out, but now my nozzle check is perfect except for the orange channel that is almost completely absent.
I ran two paired cleanings (Orange and Green) and one Power Clean cycle, and things improved, but only barely. At first I thought it was an air block in the lines, but I’ve inspected the lines and can’t see any bubbles. After three cleaning cycles I decided to let the printer sit overnight for fear of damaging the head. I know the head is (or was) in good shape from the earlier checks, and the color is looking good on all other channels so I’m tempted to just run the first Init. Fill with the PiezoPro cartridges and hope for the best.
I found a very similar post using the search tool, and it seemed to validate my theory. I guess I’m asking if this is a horrible idea, and if I should keep running Init FIlls of Piezoflush until I have all channels back online.