Worcester cdi EA fault

[stokecity]

Hi guys

Does the worcester cdi have an internal bypass?

Long story short ive done some ufh on a worcester cdi not a big system 7 rads and ive added a 10m2 conservatory pack.

Both zone valves ( for ufh and radiators ) have been left locked open untill spark goes back. Just over a week later boiler developed EA fault and goes to lockout after 4 attempts sometimes it lights briefly.

Customer has got boiler cover so they have been out. First said the condense was blocked. Then something else. Now they saying its pressure build up as i havnt fitted a bypass.

Just want to double check before i tell him hes wrong

 

[ShaunCorbs]

Have you split the system into a s + plan ?

 

[stokecity]

Have you split the system into a s + plan ?

Hi shaun

Yes system is now an S plan but at the moment both valves are locked open

 

[ShaunCorbs]

Needs an external bypass as the internal one won't cope

Are / have they been locked open when the fault is on ?

But they shouldn't cause an issue as ea is normally no flame detected

 

[stokecity]

Needs an external bypass as the internal one won't cope

Are / have they been locked open when the fault is on ?

But they shouldn't cause an issue as ea is normally no flame detected

Yes both locked open with fault on. Boiler goes stright to lockout so i cant see how it would be pressure build up anyway

 

[Gas74]

EA is usually condensate blocked / electrodes goosed or gas valve.

 

[Harvest Fields]

I had one recently where the tube inside the condense trap had kinked and was causing the condense to back up. Worcester have completely changed the trap now. It is nothing like the original design. Not done it once since.

 

[Vee]

May not have an integral bypass if its a CDi conventional.