Alpha cb 24x

[AllyBongo]

Got a 24x which would not ignite. Will spark, but goes to lock out, red light stays on. MI say check for power on the board, M7 22&23 i think it was. Had no power, so got a new board. New board fitted but same problem, getting continuity through the OH stat. New board still has no power on the gas valve pins. Think i need Alpha Man!! Lol

 

[Puddle]

Again this post belongs in the trade gas forums,give Dave a pm,AllyBongo,with your gsr details and you will find a lot more response and help with posts like this

 

[Alpha man]

Either Gas valve or GV loom plug.

 

[AllyBongo]

Do you know what connections on the GV plug to test, the wiring diagram in MI's dont show, they just say test across the pins on the board. But the plug on the board has the two pins for the OH stat... Would I be right in thinking if the plug is off the gas valve wouldn't get power anyway cause the OH is disconnected!?

 

[Garyb]

Worth checking polarity of power supply coming into the boiler.sounds similar to a problem i had a few years ago,But cant remember exact symptoms.

 

[psk]

i had the same issue commissioning a main few months back.
it turned out to be reverse polarity. the rectification process is affected. Also Alpha man might be right with the GV theory

 

[Alpha man]

Do you know what connections on the GV plug to test, the wiring diagram in MI's dont show, they just say test across the pins on the board. But the plug on the board has the two pins for the OH stat... Would I be right in thinking if the plug is off the gas valve wouldn't get power anyway cause the OH is disconnected!?

Sorry mate, I just plug and play, if you disconnect the OHS you will brake circuit, but be careful as there will be 240V at the OHS/wiring.

My money would be GV plug loom.

 

[AllyBongo]

Back to it this morning, linked the OHS pins on the PCB, getting 240V on the gas valve pins. So either GV or plug as you say. The PCB i took out did have a few dry joints and had been wet before the boiler broke down. I'll get a GV and plug and return whatever one i dont need. I'll let you know the result

 

[shortcircuit]

Again this post belongs in the trade gas forums,give Dave a pm,AllyBongo,with your gsr details and you will find a lot more response and help with posts like this

Confused is this not the trade gas forums

 

[AllyBongo]

GV loom plug it was!!

 

[Puddle]

Confused is this not the trade gas forums

No,we have a forum for gas reg plumbers as below

http://www.ukplumbersforums.co.uk/g...ate-gas-safety-registered-plumbers-forum.html


it has over 400 threads and over 3500 posts

Would recommend gas safe members should join as will find very beneficial when problems such as described in this thread or any gas related issues