24cdi of combi fault

[huddster]

can anyone give me a quick hand with this fault-i have a 24 cdi of with ignition fault-slow flashing central heating light, when u reset pump runs and light flashes again any help would be great as i dont have the sequence of operation to hand

 

[Roger Welton]

CH slow flash is a burner lockout from memory, is it sparking? continuity across gas v/v solenoids?

 

[huddster]

no spark as soon as you reset, pump runs and back to ignition fault does anyone have sequence of operations?

 

[Roger Welton]

24CDi OF (discontinued March 2005) literature - Worcester, Bosch Group UK installer site

 

[fixter1]

is fan running????

 

[Roger Welton]

Open flue version

 

[jtsplumbing]

Have you tried switching of main power to boiler ? leave for 1min swirch back on then retry ! could be either -- spark electrode /control board / or gas valve, You need multimeter to check a few things out.

 

[fixter1]

spark electrode check spark gap,electrode lead

 

[Millsy 82]

Check the O/H stat, APS, Then fan.

It wont be gas valve spark electrode etc unless the fan has come on and APS has made.

 

[jtsplumbing]

Open Flue Millsy 82 No fan / aps