While you wait for answers, we may have found some information which could help you.
Success
Message
suprima 50?
We are not getting hot water Whymight that be?
identifying the flow and return pipe?
Potter powermax HE won't refill?
no fault code ?
threeway valve?
Potterton performa 24 boiler?
How to get hot water?
dhw working fine but chw switsh off after 10 second?
Radiators?
No heating or hot water?
changing a FP 2000 Programmer?