Riello BS2F-GPL Installation, Use And Maintenance Instructions page 55

5.1 VISUAL DIAGNOSTIC CONTROL BOX
The control box has a diagnostic function that can identify the likely causes of any malfunctions (indicator:
RED LED).
In order to be able to use this function, press and hold the reset button for at least 3 seconds from when the
appliance is made safe (lock-out).
The control box sends a sequence of pulses that are repeated at 2-second intervals.
RED LED illuminated
press reset for 3 sec.
The sequence of pulses issued by the control box identifies the possible types of malfunction, which are
listed in the table below.
SIGNAL
2 pulses

SIGNAL
3 pulses

4 pulses

6 pulses

7 pulses

ATTENTION
To reset the control box after the diagnostics display, press the lockout-reset button.
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The flame does not stabilise at the end of the safety time:
– faulty ionisation probe;
– faulty or soiled gas valves;
– neutral/phase exchange;
– faulty ignition transformer
– poor burner regulation (insufficient gas).
Min. air pressure switch does not close or is already closed before the limit
thermostat closed:
– air pressure switch faulty;
– air pressure switch incorrectly regulated.
Light present in the chamber before the burner's switching on or off:
– presence of a strange light before or after the limit thermostat switching over;
– presence of a strange light during pre-ventilation;
– presence of a strange light during post-ventilation.
Loss of ventilation air:
– air loss during pre-ventilation;
– air loss during and after safety time.
Loss of flame during operations:
– poor burner regulation (insufficient gas);
– faulty or soiled gas valves;
– short circuit between ionisation probe and earth.
Interval
Pulses
PROBABLE CAUSE
PROBABLE CAUSE
15 GB
2s
Pulses
    