Green Heating Technology
47
Signal
Probable causes
Suggested solutions
E19
Automatic filling in
not completed after
4 minutes.
During the automatic filling in (see
“E18”
) the system pressure does
not achieve the right value within the preset time. Maybe due to:
• inlet water pressure from the net is not sufficient (see "Tech
-
nical data" on page 52);
•
inlet water cannot enter the boiler for likely closed tap in-
stalled in the inlet way.
Try to restart the boiler by powering the boiler off for 30 second and
the power that on again from the bipolar switch.
Filling in valve is blocked/broken/or it is not electrically supplied •
Inlet filters are clogged
•
Big quantity of scale in the water
• Big loss
of water in the CH system.
E21
Low system
pressure
(after the four filling in
attempts)
The boilers has filled in water (see
“E18”
) for three times within the
latest 24 hours, but now the system pressure has dropped again.
Likely there is a loss of water in the CH system.
Try to restart the boiler by powering the boiler off for 30 second and
the power that on again from the bipolar switch.
During the power-up, an
automatic filling in cycle could start (see “E18”).
Note: it
is possible to experience this alarm code during the first filling in when the boiler is just installed due
to bleeding of air from the system. For this reason, at the first time the boiler get electrically supplied, the
number of fillings allowed before showing the error code are 5 and not 3 for the first 24 hours after the
installation.
Remark:
Consider that the pressure, in normal conditions, should not decrease with the progress of the time. If
this happens, there is probably a loss in the heating system. Sometimes the loss is so small that it doesn’t
leave evident signs, but with the progress of the time it can cause the decreasing of the pressure. Also the
opening of the manual venting taps of radiators (intentional or unintentional) makes the pressure decrease.
Check that this doesn’t happen.
Loss in the heating system.
E22
Memory-stored
data not coherent.
User:
Disconnect the electrical supply to the boiler by operating the
suitable external bipolar switch, then connect it again after a few
minutes. If the lockout persists or reappears, call the Service Centre.
Redo all the boiler settings ("Max heating power adjustment" on
page 40 and "Electronic settings" on page 42) to update the data in the
main board memory.
Replace the main board (consequently, redo the "Max heating pow
-
er adjustment" on page 40 and "Electronic settings" on page 42).
