Maximum average ΔT of supply and return sensor for central heating is repeatedly exceeded. Operation is normally possible for the hot water supply during the block. The pump continues to operate at minimum capacity during the block.
Check ? ow through the installation. See the installation instructions for the hydraulic connections to the boiler (3-Way-Thermostatic valve, Plumbing Kit installed?) Possible causes: (radiator) shut-off valves closed or blocked water ?lter Activeted room sensor (RS101) in non leading room (closed thermostatic radiator valves?) Check pump height. Check minimum and maximum Temperature difference in Parameter Step 46 + 47.
