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boiler flashes h5. ?

i bought a new c/board. we fitted it in. press setting, it flashes H5 what does this mean please x

angel
June 2014
Heating, Home Heating SystemsBoiler Fitted Setting
there are jumper links on the PCB to configure it to your particular model boiler

simply copy settings on old pcb & transfer to new pcb

Q
July 2014

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