Glowworm 30cxi problem

[GrahamB]

Had a 30cxi fitted in our club 4 or 5 years ago, which has run without problems. A few days ago the central heating ran warm only. In central heating demand the boiler failed to ramp up, running on one flame only; but ramped up to five flames immediately on hot water demand.
It transpired that Display d.0 - Heating Part Load was set to a low figure (not sure what) when the factory default is 82 (max). Readjusting this to 82 solved the problem!
My question is - what do the words 'Heating Part Load' mean and what could have cause the sudden change to a low figure - assuming that it must have originally been set high when the system was working?
Or have I missed something?

 

[Agile]

It sounds as if you have missed having the boiler professionally serviced for the last five years.

It might also be potentially unsafe.

Tony

 

[bell824]

you have missed loads, the 30cxi does not have a d.0, now the flexicom 30 cxi and the ultracom 30 cx does.

that aside d.o does not have an 82 option it will be upto a maximum 24, i think your 82 option is heating temperature selection, if thaty was a low number then yes radiators would be at a low temperature.

 

[GrahamB]

Thanks for the quick replies Bell824 & Agile.
Yes it is an Ultracom 30cxi.
Service well overdue! I must admit to the 'if it ain't broke, don't fix it' philosophy. But you can take that too far.
Bell824 - d.0 does have factory default of 82 (max) as shown in the Fault Finding Diagnostic Menu, which is what I have reset it to.
Which brings me back to my original question - what sort of problem could result in a sudden reduction of the d.0 parameter?