Rinnai E110CN Installation & Servicing Instructions Manual page 64

15.1.2
64
Block 11
check flow
through the
installation
maximum average T 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.
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 filter
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.