Problems with vailant ecotec plus

[Brad]

The boiler was wired with the vailant bus controls but never worked very well, so I’ve replaced it with a hive, all the controls and motorised valves operate as they should and the RT connection on the boiler is live, but the boiler wont fire up what so ever, I’ve took out the 24v link and left the burner in one. I factory reset the boiler in case it was still set up with the old controls but still nothing seems to work. Cheers

Oh yeah forgot to say it’s coming up with error f1505 gas inlet incorrect

 

[Bruspark]

Never seen a Vailant fault code that long - You sure ?

 

[Brad]

Never seen a Vailant fault code that long - You sure ?

F105 even the offset for the gas valve assembly is missing, something to do with the gas type but I selected natural gas on the set up which it is