Biasi riva compact 24s

[scatmanjohn]

Would this sort of thread be better in the Gas Installers Only section ? I think so.
//www.diynot.com/forums/viewforum.php?f=34

I reckon so...but i did not know it exsisted until about an hour ago.

 

[Gasguru]

Open up the red/black ignition box (the CVI module)....it's common to find the connector pin and undersized resistor joints have broken.

I think you are on a different beast here Gasguru.

No CVI unit on this one. Ignition pcb is under the cover next to the main pcb.

Didn't see the compact bit knew I should've called it a day.

 

[Agile]

I doubt that you have found the fault!

I expect that its a rare and intermittent fault!

If so then its a problem with the spark and flame sensing electrodes!

To be sure that you cure it you have to replace all three!

For once I cannot ( as yet ) explain either why it happens or worse still just why the ignition PCB behaves differently from normal. All I can say is that it does!

The feature is that the flame lights but within about 0.2 sec the gas valve shuts off and it goes into immediate lockout.

There is no logical explanation for the PCB to act like that within its normal operational parameters. Somehow a feedback path into the ignition PCB shuts down the gas valve and indicates an immediate lockout.

I can immagine a fault with the electrodes but have not tested any faulty ones on my EHT supply.

It seemed particularly likely on boilers made about 2004 mostly within a year of manufacture.

Tony