D1 = Hot water up to / above set value, waiting to cool before re firing
D2 = Heating up to / above set value, waiting to cool before re firing
The boiler is overheating internally, you'll need to get someone out to look at it. These boilers are stinkers. Generally the main heat exchanger is full of crud. The boiler can dissipate the heat properly and exceeds its set point target temperate. D10 is way past its threshold. Its a delay mode.
The pump could also be sluggish, or the pump overrun may be set to low. that can be changed by an engineer using the parameter setting on the pcb.
You need someone to look at it, it WILL get worse.
i was having d1 on my ferroli boiler and hot water in taps stopped coming but heating was still warm , I was so upset as last time it happened I had to spend almost 250 on labour and parts, I switched the boiler off went upstairs had sex with my wife came downstairs switched on the boiler and hot water was running just fine both in heating & taps. :-)
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Which model?
Optimax HE I bet -
D1 = Hot water up to / above set value, waiting to cool before re firing
D2 = Heating up to / above set value, waiting to cool before re firing
The boiler is overheating internally, you'll need to get someone out to look at it. These boilers are stinkers. Generally the main heat exchanger is full of crud. The boiler can dissipate the heat properly and exceeds its set point target temperate. D10 is way past its threshold. Its a delay mode.
The pump could also be sluggish, or the pump overrun may be set to low. that can be changed by an engineer using the parameter setting on the pcb.
You need someone to look at it, it WILL get worse.
i was having d1 on my ferroli boiler and hot water in taps stopped coming but heating was still warm , I was so upset as last time it happened I had to spend almost 250 on labour and parts, I switched the boiler off went upstairs had sex with my wife came downstairs switched on the boiler and hot water was running just fine both in heating & taps. :-)
on what nomenclature is it found.there are two on that make combo