Potterton Suprima 60 HE Ignition Problem

[browneye23]

I am experiencing a problem with my Potterton Suprima 60 HE.

The boiler won’t seem to ‘kick in’ and fire up.

The boiler isn’t in lockout ever ie red light on
The time programme is also working fine.
It looks normal in terms of the electrical side.

I have taken out the pcb and gave it a little clean, also powered it down and restarted it a few times.
It most definitely isn’t overheating.

Seems as though ignition sequence isn’t happening.

Any suggestions?

 

[45yearsagasman]

Can you hear the fan start?

 

[browneye23]

No nothing kicks in at all.

I have the unit open at the moment and it just does nothing!

 

[45yearsagasman]

Any lights on at all and have you done the reset by turning the thermostat knob to off, wait 5 secs and turn back up again?
Is the Mains On light illuminated?

 

[Agile]

How did you check that there is a demand for heat?

Tony

 

[browneye23]

All lights on as per normal, nothing suggesting at all in terms of the electrics that there is a problem.
I have done a re-start, I turn the knob to the off position, the light flashes and then when I turn it back on it goes green as it should do and always has done.
(I also turned the power off completely)
When the program timer comes on (or I press it for an hours heat or hot water) this lights up to say its come on.
But the boiler does not ignite.
There are no noises from anywhere inside the boiler, it remains silent.

When you say a demand for heat – do you mean the room stat?
I am no expert, but this wouldn’t affect the hot water not working would it?

 

[Agile]

When either hot water or heating ( or both ) are required then the controls create a demand for heat which is sent to the boiler which then ( should ) respond by starting to run.

If your boiler has no demand for heat then its obviously not going to run so the first check is always that there is a demand for heat.

Tony

 

[browneye23]

How would I check the demand for heat?

Thanks

 

[Agile]

You need to check for 230 v on the SWL terminal at the boiler.

However as this involves voltage measurements on live equipment it should only be attempted by someone competent to work on mains voltages.

Tony

 

[browneye23]

I will get someone round! Many Thanks!