Having Opentherm error issues with navien LCB700 oil combi boiler.
Hi, I just installed my Wireless Receiver, temp sensors and rad valves etc this evening, its too hot to test thoroughly as my house is so hot today the heating cant come as the rooms are all too warm.
I managed to set one room half a degree warmer than it was (set to 25deg when room was at 24.5) and the boiler came on, water pump only and circulated warm water from the internal heat store - burner didnt light (this feels correct to me as there would have been very low demand for heat) so im assuming all is working fine.
im having some intermittent (sometimes every 2 mins other times it goes half an hour or so) opentherm errors displaying on my boiler NAVIEN ERROR CODE 783 sometimes these last a few seconds and the boiler screen just flashes red then clears and the error can be viewed in the logs. other times the error will stay on screen for some time and its even cuasing the central heating to erroneously turn on which would bwe sending hot water round a short circuit as all the rad valves would be off in this hot weather.
the errors i could live with - but the boiler turning on when it shouldnt is a real worry.
how can i debug this - how can i find out what opentherm requests the tado is making when the error is displayed on the boiler. i really dont want to have to wire this up in relay mode and lose the modulation opentherm provides... i need log files so i can work out whats going on...
any help appreciated.
Edit: Temps have gone down a bit and managed to call for a 2 degree increase and the boiler started up as expected. so it does seem to be working. however the opentherm errors are happening every couple of minutes while its actually heating...
faulty, tado ? faulty boiler main board ? not compatible ? i dont know where to turn to diagnose this. neither the boiler nor tado seem to expose enough info to assertain the problem.