Epson Photo 1500W - lights blinking for paper and ink, nothing I can do (CISS installed)

[avenuedelapoesie]

I've just installed this CISS, and the ink light keeps on blinking, but now also the paper light (which wasn't blinking before)
When pushing the buttons, nothing happens.
The printerutility says 'communication error'.
What can I do?

 

[Hogwild]

I have a service manual for that, if it'd help. Table 3-2 is titled "Troubleshooting of Communication error".

 

[avenuedelapoesie]

OW yes please, that might help!

 

[Hogwild]

PM me.

 

[Hogwild]

Did the service manual help?