I'm sorry to hear you're experiencing trouble with two of the chips/carts from the set of R3000 refillable carts you recently purchased.
To get a better understanding of your situation so I can determine the best/fastest way to remove this issue and get you back to happily printing, please answer a few questions:
Do you have the full set of refillable carts installed in your printer, and have an error with both the VLM and PK positions, or have you only installed a few refillable carts as your Epson carts empty, and still have some refillable carts that haven't been installed yet? What is the exact error displayed on your printer's LCD panel for the VLM and PK position refill carts? Please look at the two cartridge chips to make sure they're clean and there's nothing on the gold contacts that could interfere with the printer's ability to read them.
Please let me know right away so we can resolve this for you.
Best regards~ Dana