52
COMMISSIONING AND MAINTENANCE
EXTRANEOUS LIGHT OR FALSE FLAME SIGNAL
The presence of the parasite flame or the extraneous light can be
detected in the standby condition when the burner is stopped
and waiting for a heat request. If the presence of a flame or ex-
traneous light is detected also in the "t2" stage, the motor does
not start until the flame signal has disappeared or until lockout
has been reached. If extraneous light or a false flame signal is
detected when the fan motor is running during pre-purging,
the burner stays in purge mode until the light or flame signal
stops. If this does not occur within 25 seconds, the burner locks
out. If the parasite flame or the extraneous light are detected
during the pre-purging, the pre-purging time of 15 seconds is
reset and the time for checking for the presence of a parasite
flame or extraneous light begins (the motor continues to purge).
The function is cumulative and can be carried out a maximum
of 2 times. If at the 24th second the parasite flame or the extra-
neous light disappears, the pre-purging time starts and if the
parasite flame or the extraneous light reappear the pre-purg-
ing time is reset and the countdown of 25 seconds for checking
for the presence of the parasite flame or the extraneous light
restarts. The burner also locks out if extraneous light or a false
flame signal is detected three times.
If during the recycling due to flame disappearance when oper-
ating and the consequent repetition of the start-up sequence
the presence of a parasitic flame or extraneous light is detected,
the control countdown of 25 seconds starts (for the presence of
the parasitic flame or extraneous light).
The fault is indicated by the blinking LED (see paragraph “Fault
diagnosis - lockouts” on page 49).
PRE AND POST-IGNITION
During pre-ignition, the ignition electrode switches on 2 sec-
onds before the fuel oil valve opens.
During post-ignition, the ignition electrode switches off 3 sec-
onds after the end of safety time.
Ignition remains active throughout safety time.
NOTE
If the ignition cycle repeats continuously or a series of heat re-
quests are received in a short time, the functioning of the igni-
tion transformer is limited to one cycle a minute.
POWER SUPPLY FREQUENCY ERROR
The burner controller automatically detects the frequency of the
main power supply over the interval of 50 to 60 Hz. Operating
times are verified for both frequencies.
An error is indicated by the LED flashing (see paragraph “Fault
diagnosis - lockouts” on page 49).
− If an error is detected before a heat request is made, the
burner does not start up and the error is signalled.
− If an error is detected during pre-purging, the burner re-
mains in purge mode and the error is signalled.
− If no error is detected during normal functioning, the
burner continues to function normally.
The burner starts up as soon as the error disappears.
FAN MOTOR CONTROL
The burner controller automatically detects the presence of the
fan motor and enters lockout in the event of a fan motor failure.
An error is indicated by the LED flashing (see the “Fault diagnosis
- lockouts” section on page 49).
INTERNAL VOLTAGE ERROR
The burner controller automatically checks that internal voltage
is correct. An error is indicated by the LED flashing (see the “Fault
diagnosis - lockouts” section on page 49).
− If an error is detected during initialisation, the burner
does not start up.
− If an error is detected after a lockout, the burner will not
start up.
− If an error is detected after a shutdown test, the burner
will not start up.
− If no error is detected during normal functioning, the
burner continues to function normally.
The burner starts up as soon as the error disappears.
RESET BUTTON ANOMALY
If the reset button is faulty or is kept pressed for more than 60
seconds, the fault is indicated by the blinking of the LED (see
paragraph “Diagnostics of Faults - Lockouts” on page 49) as long
as it is present.
This is merely a signal of the error condition.
− If an error is detected during pre-ventilation or safety
time, the burner does not enter lockout but continues
with the startup sequence.
− If an error is detected during normal functioning, the
burner shuts down and does not restart. The error is sig-
nalled.
− If an error is detected while the burner is already locked
out, no signal is displayed but the burner cannot be re-
set. The LED stops flashing as soon as the error disap-
pears.
CHECKING THE ELECTRONIC CIRCUIT CONTROLLING THE OIL VALVE
The control box detects the presence of a fault inside the elec-
tronic circuit controlling the oil valve, the fault is indicated by
the blinking LED (see paragraph “Fault diagnosis - lockouts” on
page 49).
− If the anomaly is detected during the initialisation, the
burner goes into lockout.
− If the anomaly is detected during the pre-purging, the
burner goes into lockout.
− During a recycling, if the fault is detected, the burner
does not start and goes into lockout.
− If the fault is not detected during running position the
burner remains in operation.
The fault is not detected if the burner is in lockout.
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