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7.10.8 Reset protection
The burner can be released by pressing, for at least 0.4 seconds,
the reset push-button integrated in the control box and the un-
locking occurs only when the push-button is released.
NOTE:
The burner can be reset only 5 times consecutively, then
power supply has to be disconnected for a new 5 reset pos-
sibilities.
The burner can only be reset if power supply is applied to the
control box.
7.10.9 Reset push-button anomaly
if the reset push-button breaks or is kept pressed for more than
60 seconds, the fault is indicated by the blinking of the led (see
section 7.10.2) as long as the fault is present.
This fault is merely a visualisation.
If the fault is detected during pre-purging or safety time, the
burner does not stop (the start-up sequence will continue).
If the fault is detected during operation, the burner does
stops and stays stopped with the fault signal active.
If the fault is detected during a lockout, the fault is not sig-
nalled and the burner cannot be reset.
When the fault disappears, the LED stops flashing.
7.10.10 Frequency main supply anomaly
The control-box automatically detects the value of the frequency
of the main supply in the range of 50 - 60 Hz, in both cases work-
ing times are verified. The fault is indicated by way of the blinking
LED (see section 7.10.2).
If the anomaly is detected before heat demand the burner
does not start.
If the fault is detected during the pre-purging, the burner
remains in purge condition and the fault is appropriately sig-
nalled.
The fault is not detected during normal running, the burner
remains in this state.
When the fault disappears, the burner restarts.
7.11
POST-PURGE
Post-purging is a function that allows you to maintain the air purg-
ing even after the burner is switched off in the absence of the heat
request for a pre-set time.
The burner switches off the flame when the heat request thermo-
stat opens, cutting off the fuel supply to the valves.
The post-purge function is not performed:
after a lockout
if the heat request is interrupted during pre-purging.
Post-purging occurs:
if the heat request is interrupted during the safety time;
if the heat request is interrupted during normal operation.
NOTE:
If during post-purging there is an extraneous light or a para-
site flame the burner goes into lockout after 25 seconds.
If during post-ventilation there is a new heat request, the
post-purging time is halted, the fan motor stops and a new
burner operating cycle starts.
Start-up, calibration and operation of the burner
7.10.11 Internal voltage anomaly
The control-box automatically detects if the internal voltage
works correctly. The fault is indicated by way of the blinking LED
(see section 7.10.2).
If the anomaly is detected during the initialisation check time,
the burner does not start.
If the anomaly is detected after a lockout the burner does not
start.
If the anomaly is detected after a shut-down test, the burner
does not start.
The fault is not detected during normal running, the burner
remains in this state.
When the fault disappears, the burner restarts.
7.10.12 Checking the fan motor
The control box automatically detects the presence of the fan mo-
tor and, in the event of a fault, it performs a lockout. The lockout
is indicated by the flashing led (see section 7.10.2).
7.10.13 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
flashing led ("see section 7.10.2"):
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 anomaly is detected during running position the burner
remains in operation.
The fault is not detected if the burner is in lockout.
7.10.14 EEprom check
The control-box automatically detects if EEprom memory of mi-
cro-controller has failed and will perform a lockout. The lockout is
indicated by flashing led (see section 7.10.2).
25
GB
20115639
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