34
4.6 FUNCTIONING
ERRORS
When there is a functioning error, an
alarm appears on the display
and the
blue luminous bar may become red.
Descriptions of the errors with relative
alarms and solutions are given below:
–
LOW WATER PRESSURE ERROR
ALARM 02 (fig. 23/a)
If the pressure detected by the tran-
sducer is lower than 0.5 bar, the boiler
stops and the display shows the alarm
“ALL 02” using the external filling de-
vice, fill the system until the pressure
indicated by the transducer is between
1 and 1.5 bars(PAR4 default).
If the refilling procedure has to be re-
peated several times, it is advisable
to check that the seal of the heating
circuit is intact (check that there are
no leaks).
–
HIGH WATER PRESSURE ERROR
ALARM 03 (fig. 23/b)
If the pressure detected by the tran-
sducer is more than 4.8 bar, the boi-
ler stops and the display shows error
“ALL 03” (PAR4 default).
–
D.H.W. SENSOR ERROR
ALARM
04
(fig. 23/c)
(Disabled))
Check that PAR2 is set correctly.
–
HEATING FLOW SENSOR ERROR
ALARM
05
(fig. 23/d)
If theheating flow sensor (SM) is open
or short circuited, the boiler will not
function and the display will show the
alarm “ALL 05”.
–
LOCKOUT
ALARM
06
(fig. 23/e)
If the flame control has not detec-
ted the presence of the flame after a
complete ignition sequence, or for any
other reason the card cannot “see” the
flame, the boiler will stop and the di-
splay will show the alarm “ALL 06”.
Press the key
of the controls (2)
to start up the boiler again.
Fig. 23/e
2
Fig. 23/a
Fig. 23/b
Fig. 23/c
Fig. 23/d
