Ideal logic 30 f1 fault wont pressure up from fill from loop

[Rumples22]

i have this boiler and have the F1 error i looked in the boiler manual on the fault and what to do topped up the water pressure with the filling loop and boiler worked fine for 5 days then the same problem occurred tried using the filling loop again but when i open the valves blue fully and then the black slowly nothing happens no soundsof water rushing through or anything.its as if there is no pressure/water. Ive been without heat or hot water for two days and would be grateful if anyone could advise on what may be the problem thanks . Jo.

 

[hammers4spanner]

How long has it been installed for ?

 

[Rumples22]

Hi two and a half years.

 

[MrMeek]

is all valves open on the cold and return side (the loop on the right) theres four in total, ps you've got a leak somewhere if the pressure keeps dropping

 

[Ermintrude]

Isn't this a repeat post?