had lockout problem recently on suprima 60 as it was on its second card,i thought i would look at old card for dry joints ,as in both cases of problem both being the same ie thermostat calls for heat, pump kicks in then boiler fires up ,apart from boiler does not fire up then locks out, now this would normally happen if the boiler senses that the pump is not working ,but in my case it is ok,looked at wiring diagram in manual and traced it back to feed on pcb j8 plug in connection point 5pin point,yellow wire ,which had a dry joint on reverse of card (the feed from the pump) resoldered and now working fine...old card no 407750 new card no 5102160 which was fitted 3 years ago ,