As I see it, you have radiator sign moving which means 'Call for Heat' has been detected, yet boiler does not ignite and no fault code is displayed.
I don't believe it will make matters any worse if you reset the boiler. Hold reset button for 1 second.
I think that as this is a 'System Boiler' then the HW setting is not relevant. There will probably be a stat on the storage tank and a motorised valve near the tank. The boiler is either making hot water or not, it doesn't know if it is for heating purposes or for hot water purposes.
So it looks like the boiler isn't lighting. Do you know how I could possibly get it working? At the moment I'm looking at section 3.3 on page 21 of the manual. Thanks
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