Description of functioning
t e c h n i c a l
40
F10
This
fault that occurs when there is a problem with the gas valve
or PCB.
As
the burner
shuts down
the
solenoids on
the gas valve
. These
close one
at a
time
until
the fl ame
extinguishes
. If the fl ame
remains on for
5 seconds
the PCB will
repeat the shut down by
turning off
the solenoid that failed the 1st time.
If a flame continues to be detected after the 2nd shut down sequence the boiler
will lock out.
Possible causes:
-
PCB failure
(one of the electrovalve relay is broken)
- Gas valve failure
F11
Occurs when the DHW t
h
ermistor is out of range, open or short-circuited
If this fault
ocours
the heating mode will work norma
l
ly and the DHW mode will
also work but using the heating t
h
ermistor as reference to heat the DHW.
This fault
will
auto-reset when the t
h
ermistor
is
in range.
F13
It´s a failure of the heating t
h
ermistor, that it is out of range, open or short-circuited.
If this fault occurs, the boiler blocks. This fault auto-reset , when the t
h
ermistor
returns
within normal operating range.
Possible causes:
- Heating thermistor failure
-
Faulty PCB
- Minimum very high
NC
No Comunication. It’s a comunication error between main control circuit and front
panel circuit.
NOTE: Apart from the failure codes, the word “Err” may appear on the control panel.
Meaning: If it appears on the 4 digit display, it means that there is no communication
between the control card and the control panel card.
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