Digital Pre Infusion Kit Error Code

Matt Segall

I installed the Digital Pre Infusion kit yesterday and all seems to be working well. However, this morning for a moment on the display popped the error: Check Expvalve

It disappeared and went back to showing the Bar and Set value

Anything I need to worry about?

Frans Goddijn

It's just a message, not an alarm, not an urgency. Its a hint to check at what pressure the expansion valve drips water back into the water reservoir. Reiss has explained on the forum how to adjust the valve to have the pressure max at about 11.5 bar and then this message won't appear.

Reiss Gunson

hi matt

yes, frans is exactly right

the instructions you require for adjusting the expansion valve are here; https://londiniumespresso.com/permanent-file/1336-does-the-pump-stutter-on-and-off-repeatedly-when-the-lr-is-idle

let me know if you need help

kind regards

reiss.