Buderus oil burnner error

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bggas400

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Hey all..

Hope I'm posting in the right place.
My 2 year old Buderus (Logamatic R-2107) is spitting out a 'HDW PROD ERR' message on the display panel. This is an oil fired burner.

I have two zones and when either zone requests heat, the TACO Zone Valve Control's red light illuminates for that particular zone and the Z-one activator end switch trips.

If I move the thermostat (fairly new Honeywell digital) below the current room temperature, all lights go out on the control panel and the lever on the Z-one switch goes back to where it should be. The boiler still shows the error however.

Any ideas as to the cause?

Need more info?

Update: I am now losing water pressure.

thanks in advance for any help,
bgg
 
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