Optimax he plus 31c timer - Hardware & Accessories

Try bleeding the air out of the rads then represure system

Heat exchanger blocked or pump failed, the boiler is overheating internally.

Why does the display appear and i can set timer but then display goes blank and i carnt getthe lcd screen to display anything at all??

it is either your pump is not running or blocked [ debris from installation ect ] or your diverter valve is stuck partially open allowing a little water to pass into the heating system [ usually first rads on system ] it runs for a short while and cuts out because your overheat stat is kicking in because of poor circulation [ it is only running around the primarys in the boiler where it quickly reaches the over heat limit ] temp tends to rise approx 1 deg per second a clear indication of circulation problems.
solution GET RID OF THE FERROLI

I sent an e-mail to [email protected] telling them that my Optimax HE 31 C
manual didn't include instructions for the timer, and received a manual via e-mail within minutes.

You probably won't get a reply during the weekend though.

Good luck!

Trevor

try here..thank the finder
Optimax HE Digital Timer instructions

hi had same problem engineer came out and the diverter valve was cloged up sorted it and recomended a system flush plus install a magnet clean whitch picks up debri be 4 it gets 2 the boiler.

there is just two screws holding divertor valve in remove these screws (do not touch painted screwheads) then twist left to right and pry gently were the two screws were fitted. best bet is to replace diverter valve head to stop noise

D2 is not a fault what that means is delay and 2 refers to CH which means the boiler has gone into standby mode. you need to check that your CH circut is open, there is a filter on the return valve into boiler make sure this is not blocked. If this is blocked the water is just going though the boiler by-pass so then the boiler thinks its up to temp. hope this helps

Here is a link to the manual.It shows fault codes.
http://www.ferroli.co.uk/Product_Documentation/Domestic/Optimax_HE_31_C_Manual.pdf

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