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3.7.14 Monitoring the power supply voltage
The control box automatically measures the mains voltage.
If the voltage is less than 160V or more than 280V, the burner
stops, interrupts the operating cycle and remains in stand-by, sig-
nalling a fault. The fault is indicated by way of the blinking LED
(see paragraph "Fault diagnostics - lockouts" on page 10).
The burner restarts when the voltage exceeds approx. 170V or if
it goes below 270V.
If the fault is detected with flame operation, the valve is imme-
diately closed and the motor stops.
If the fault is detected during pre-purging, the motor stops.
If when the main power supply switch is closed or after there
has been no power, the mains voltage stays within the inter-
mediate values (160-170V or 270-280V) the burner does not
start.
If the burner is in lockout, the mains voltage is monitored but
is not signalled in that there is a lock-out signal.
During the ignition time the mains voltage monitoring is deactivat-
ed.
3.7.15 Frequency supply error
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 paragraph "Fault diagnostics - lockouts" on
page 10).
If the fault is detected before heat request 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.
3.7.16 Internal voltage fault
The control box automatically detects if the internal voltage works
correctly. The fault is indicated by way of the blinking LED (see
paragraph "Fault diagnostics - lockouts" on page 10).
If the fault is detected during the initialisation check time, the
burner does not start.
If the fault is detected after a lockout the burner does not
start.
If the fault 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.
3.7.17 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 blinking of the LED (see paragraph "Fault di-
agnostics - lockouts" on page 10).
3.7.18 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 the blinking of the LED (see para-
graph "Fault diagnostics - lockouts" on page 10).
20138365
Electrical data and operating times
3.7.19 Checking the electronic control circuit of the
The control box detects the presence of a fault in the 1st stage
valve's electronic control circuit,
the fault is indicated by the flashing LED (see paragraph "Fault
diagnostics - lockouts" on page 10):
if the fault is detected during the initialisation, the burner
if the fault is detected during the pre-purging, the burner
During a recycling, if the fault is detected, the burner does
The fault is not detected during normal running with flame,
The fault is not detected if the burner is in lockout.
3.7.20 Checking the electronic control circuit of the
The control box detects the presence of a fault in the 2nd stage
valve's electronic control circuit,
the fault is indicated by the flashing LED (see paragraph "Fault
diagnostics - lockouts" on page 10):
if the fault is detected during the initialisation, the burner
if the fault is detected during the pre-purging, the burner
During a recycling, if the fault is detected, the burner does
If the fault is detected when there is the motor starting and
The fault is not detected if the burner is in lockout.
3.7.21 Checking the short-circuit of the 1st stage
The control box, in addition to detecting a fault with the electronic
control circuit of the 1st stage valve, can also detect the presence
of a short-circuit of the valve itself.
In this case the control box goes into lockout to protect against
overcurrent.
This lockout can also occur if, even with the valve operating cor-
rectly, because of a fault the electric section inside connected to
the valve itself is damaged.
The fault is indicated by the blinking of the LEDs.
12
GB
1st stage valve
goes into lockout.
goes into lockout.
not start and goes into lockout.
the burner remains in this state.
2nd stage valve
goes into lockout.
goes into lockout.
not start and goes into lockout.
valve 1 command, the burner goes into lockout.
valve
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