Epson Stylus Color 980 Manual page 166

4. Follow the on-screen instructions.
The P power light flashes while the printer performs the
cleaning cycle. This takes about one minute to complete.
c
5. When the P power light stops flashing, click Print nozzle
check pattern in the Head Cleaning dialog box to confirm
that the head is clean and to reset the cleaning cycle.
Below are nozzle check patterns:
Good sample
Print head needs to be cleaned
The above sample is in black and white, but the actual check pattern prints
in color.
If you find that any segments are missing from the nozzle check
pattern, you may need to repeat the head cleaning and print the
pattern again.
9-6
Maintenance
Caution:
Never turn off the printer while the P power light is flashing.
Doing so may damage the printer.
Segments are missing