31
20146122
GB
Installation
5.15 Lockout types
Whenever a lockout occurs, the control box shows the reasons
for the fault (and the reasons can be identified by the reset button
colour).
The sequence of pulses issued by the control box of the LED in
the reset button identifies the possible types of fault, which are
listed in the table below:
Tab. M
Blink frequency of the reset button for status indication (see par-
agraph
“Fault diagnostics - lockouts”
on page 23).
Lockout description
Lockout time
Led colour
Probable cause
Presence of parasite flame during
stand-by
After 25 seconds
-
presence of a false flame after heat request or
during post-purging
Detection of parasite flame during
pre-purging
After 1 second
-
presence of false flame signal during pre-purging
The flame is not detected after the
safety time
3 seconds after the
activation of the gas
valve
-
ionisation probe faulty or not connected
-
gas valve
-
faulty ignition transformer
-
badly regulated burner
Flame failure during operation
After 3 recycles
-
burner not calibrated correctly
-
ionisation probe faulty
Fan motor error
Immediate
-
faulty fan motor
-
fan motor not connected
Fault with the gas valve control circuit
Immediate
-
gas valve
-
internal control circuit of the 1st stage gas valve
faulty
Eeprom error
Immediate
-
faulty internal memory
Lockout due to air pressure switch
not closing after a heat request or af-
ter a recycle due to flame loss during
operation
After 15 seconds
-
the air pressure is too low, (the head has been
poorly adjusted)
-
The air pressure switch is defective: change it
Lockout for loss of air pressure or af-
ter repetition of the pre-purging due
to loss of air, or 10 sec before the end
of the pre-purging, or during the safe-
ty time, or during normal operation
After 1 second
-
the air pressure is too low, (the head has been
poorly adjusted)
-
the air pressure switch is defective: change it
Lockout due to air pressure switch al-
ready switched to closing of the heat
request thermostat or after a recycle
due to flame loss during operation
After 120 seconds
-
the air pressure switch is changed over to the op-
erational position, change the pressure switch
-
the fan motor continues to be powered, check
the lockout of the flame control
ATTENTION
To reset the control box after visual diagnostics
have been displayed, you must press the reset
button.
ATTENTION
In the event the burner stops, in order to prevent
any damage to the installation, do not unblock the
burner more than twice in a row. If the burner
locks out for a third time, contact the customer
service.
DANGER
In the event there are further lockouts or faults
with the burner, the maintenance interventions
must only be carried out by qualified, authorised
personnel, in accordance with the contents of this
manual and in compliance with the standards and
regulations of current laws.
