The ink was too low in PK to switch from MK. Now the auto fill does not work. How can I fill the PK on the P600 when this occurs?
You need to either get a second backup PK chip from us or an OEM PK cartridge so you can temporarily switch back.
In future if your active black ink is low, always print until it re-sets back to full so you don’t get stuck. it’s a limitation of the ARC chip technology and we put this warning on the product website page in red.
Epson forces customers to simply buy a new cartridge when they get to this point . . .