C
Coen
I have mounted a VR66 wiring centre in dual zone (switch in position 0) with two VRT350 thermostats. The heater is an Vaillant Ecotec Plus with combiboiler from october 2020. And I must say it works very well when one or both thermostats ask for heat. When there is no demand for heat the boiler goes into a continuous test of the waterpressure sensor ( about 3 times per minute) and diagnose code s97 is displayed. At the moment there is a new demand for heat, the test stops and everything works fine.
When there is no VR66 connected and a VRT350 is connected directly to the boiler, it doesn't go into this testmode.
Does anyone has a clue?
When there is no VR66 connected and a VRT350 is connected directly to the boiler, it doesn't go into this testmode.
Does anyone has a clue?