Green Heating Technology
39
f
when the draining is over, close the draining tap (turn it clockwise).
Alarms - boiler block
Following a malfunction, the boiler can lock-up and show a particular signalling, consisting of an alarm
code on the display and of the status of the
RED
light indicator (and eventually of the
GREEN
and
the
YELLOW
ones). In the following table, all the alarm signals are listed, their most probable causes
and the suggested solutions.
Each alarm code is complete of the status of the
RED
light indicator:
= on
;
= blinking
;
= flashing with pulses; = off
. Some alarms are signalled with a combination of two or more lights,
in this case the light colours are explicitly reported close to the relevant status.
Operations accompanied by the symbol are always reserved to the Technician. Operations
with grey background are reserved to the Technician.
Signal
Probable causes
Suggested solutions
01
Boiler just installed
(air mixed to gas).
Retry the ignition several times: turn the knob
on the unlock
position
, wait the red light to turn off, then bring the knob
in the previous position.
The flame has extin-
guished or it did not
ignite
Restore the boiler function by turning the knob
on the unlock
position
, wait the red light to turn off, then bring the knob
in the previous position.
In case of frequent blocks, verify the correct combustion, the
good state and the cleaning of the burner.
Incorrect com
-
bustion / flame de-
tachment from the
burner
Check that the Inlet/Outlet Ducts and the respective terminals are
clean and in good condition, and that there are no leaks in them.
During the installation, respect the regulation prescriptions, the
slopes and the lengths (see "Flue systems" on page 21).
Note for the TECHNICIAN: The burner flame is not detected by the control electron
-
ics because it has not turned on or it has suddenly turned off, or it has detached
from the burner, because of an incorrect combustion. This can be due, in exam
-
ple, to combustion product reflow into inlet duct, leaks in inlet/outlet ducts or
errors in sizing of ducts (ducts length out of the allowed range, and/or wrong
use of the reducer on boiler’s outlet).
Incorrect
electrical supply
Check that the electrical connections Live, Neutral and Earth are
correct and efficient, and especially that the Live and the Neutral
are not swapped (see "Electrical diagram" on page 49).
Remark:
The problem may also be caused by an incorrect electricity supply by the
Electrical Agency (unbalanced Neutral).
Condensate drain
problem
Verify and restore the correct condensate drain.
Warning!
DO NOT open the combustion assembly before
having cleared the drain and removed the condense accu
-
mulated in the combustion chamber.
This alarm is caused by the
condensate that, after having partially filled the combustion chamber, reach
-
es the detection electrode and inhibits the detection of the flame ionisation.
Then, check the combustion and verify that the burner is clean and
in good conditions.
