Grundfos ALPHA2 Instrucciones De Instalación Y Funcionamiento página 18

Fault Control panel
4. Insufficient Light field is on.
heat
18
a) The pump
performance is set
too low.
b) The thermostat is set
too low or is not
working.
c) Air or gas in the
system.
d) The valves are
sticking.
e) Wrong direction of
flow.
f) The boiler is not
working properly.
g) The pump
performance is not
adequate for the
application.
h) The pump
performance is not
adequate for the
application.
Remedy
Increase the pump speed or
constant pressure.
Check to see if the circulator is in
the proper operating mode.
Check the thermostat to ensure
that it is set to the desired
temperature and is working.
Replace the batteries in the
thermostat.
Vent the air or gas from the system
by allowing the pump to run, as it
will vent over time.
Install an air eliminator.
If necessary rework the piping.
Make sure all valves are in good
working order, i.e. remove lime
deposits.
See the direction of flow arrow
marked on the pump.
Reinstall the pump to correct the
direction of flow.
Check the water temperature from
the boiler and check the boiler
functions.
Repair the boiler if required.
Check for proper sizing of the
circulator and other system
components.
Check the T calculation.