Ariston E-combi not Rectifying

[arran197]

Had a look at this beautifully crafted machine earlier, igniting as should and the flame lit light pops on very briefly before running for 5 seconds, then cutting out and throwing the first ignition fail fault code.

Flame rec electrode looks ok, the lead has continuity through it. I found the polarity was reversed, so switched it round (I assume L on the board is supposed to be the live! Lol), but the problem is still there.

Any ideas?

 

[arran197]

No one at all got any experience of these boilers?

 

[Ermintrude]

Is earth good? Did you check earth through to burner. What was resistance back to pcb? Have you tried to clean probe and burner? Measure current in rectification? Call ariston??

 

[Ermintrude]

Is gas ok to boiler?

 

[Billy Bob Bob]

Had a look at this beautifully crafted machine earlier, igniting as should and the flame lit light pops on very briefly before running for 5 seconds, then cutting out and throwing the first ignition fail fault code.

Flame rec electrode looks ok, the lead has continuity through it. I found the polarity was reversed, so switched it round (I assume L on the board is supposed to be the live! Lol), but the problem is still there.

Any ideas?

if the polarity was reversed the pcb is cooked,who reversed the polarity?

 

[arran197]

I'm not sure, but when I checked for voltage on the connector block to the boiler from the mains, the brown was live and connected to the N on the pcb and the blue neutral was connected to the L on the pcb. So I switched them. The boiler was working fine up until a couple of weeks ago. But switching the polarity to what I assume is now correct, hasn't made any difference. The boiler fires up, but doesn't rectify. I've checked the electrode, which are a strange shape, but looking at the instructions look correct. I've got continuity through the probe down to the connector on the pcb. What rectified voltage should I be getting, about 3v Dc? The guy I went with to have a look tried ringing Ariston, but gave up after waiting on hold for 30 mins.

 

[arran197]

Managed to get through to the technical, said either the
electrode or pcb, but if the electrode looks ok, they are supposed to be a weird shape anyway, then it's the pcb. I've heard they're common on Ariston boilers anyway.

Lucky me, there's a Clas HE fitted in the house I'm buying!

 

[Billy Bob Bob]

Managed to get through to the technical, said either the
electrode or pcb, but if the electrode looks ok, they are supposed to be a weird shape anyway, then it's the pcb. I've heard they're common on Ariston boilers anyway.

Lucky me, there's a Clas HE fitted in the house I'm buying!

thats bad luck

 

[arran197]

I know, need to swap it for a good old trusty Duo Tec.