Potterton Profile 50e not sparking

[Michael29068]

Hi, I am looking at a Potterton Profile 50e on which initially the fan was cycling on start up. I changed the Pcb and this sorted the cycling problem however I cannot get it to start sparking.
I have checked air tubes and restrictors to Air Press Switch and also Air Press Switch is changing over. Door seals are ok and connections onto pcb are ok. I have also changed ignition lead and electrode, but it will not spark for me. I have also tried another Pcb.
Any suggestions anyone.

 

[Last Plumber]

Have you tried with case off ?

 

[Michael29068]

Have you tried with case off ?

I have and I have even disconnected hoses from APS and connected an external hose to APS to simulate fan running therefore changing APS state. Thanks for your reply I am baffled.

 

[Harvest Fields]

Is there power at the pcb? And if yes is there power on the A.P.S and Fan. If not check your wiring on the PCB.

 

[Michael29068]

Is there power at the pcb? And if yes is there power on the A.P.S and Fan. If not check your wiring on the PCB.

There is power to fan and Aps as Fan is running as I am activating Aps

 

[Harvest Fields]

Check all the connections on the board. If necessary go through every wire again. Is it clicking at all? Is there power at the gas valve?

 

[Michael29068]

Check all the connections on the board. If necessary go through every wire again. t isIs it clicking at all? Is there power at the gas valve?

It is not clicking at all, there is no power to pilot solenoid on gas valve

 

[Harvest Fields]

Surely if there is power to the fan and aps. I would be checking my wiring on the new board. Sounds like either APS or board. Check APS tubes are on the correct way around and pcb has been wired correctly and fuses are ok if there is any on the board.

 

[Last Plumber]

Is there 240 v between T2 and T4?
Have you replaced APS?
Have you checked overheat stat?

Here !

Page 26

 

[Michael29068]

Is there 240 v between T2 and T4?
Have you replaced APS?
Have you checked overheat stat?

Here !

Page 26

I have not checked voltage between T2 and T4.
I have replaced APS.
I have not checked overheat stat.
I will check these tommorrow. Thanks.