ive got the same boiler.i got my manual from heatcall free of charge by calling them on 01773 828100.make sure you ask for the right one as there is a 80e and a 80E which are very different.
fo= flow rate sensor failure.
loss of systems water.
air lock in boiler.
pump failure..
action:- check sensor.
refill system and check for leaks.
bleed boiler and system.
check the pump.
sue
January 2009
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