We may have found other answers which could help you.
Click here for Ravenheat Hot Warmpressure dropping on openning the hot water in my ravenheat csi 85 aboiler?
Central heating but no hot water?
Ravenheat CSI 85 Red Light?
ravenheat csi 85 b (t) hot water no central heating?
Faulty Ravenheat condensing boiler?
What is wrong with my ravenheat white star combination boiler,?