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