Been to have a look
All the electric dead tests and polarity ok
System pressure 1.5 bar ok
At first the boiler fired up for a few minutes, then lock out.
After then would not fire up, sparking ok.
Inlet pressure ok, nothing on bp as not igniting.
Looked in the manual says f28 could be a...
Ideal logic reading l2
19mb at the inlet
4.2 k ohms gas valve
5 dc to the gas valve not sure on that?
Continuity on wiring to gas valve
Are the pcbs common faults on these?