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