20098824
15
GB
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.
The sequence of pulses issued by the control box identifies the possible types of malfunction, which are
listed in the table below.
To reset the control box after the diagnostics display, press the lockout-reset button.
SIGNAL PROBABLE CAUSE
2 pulses
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).
SIGNAL PROBABLE CAUSE
3 pulses
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.
4 pulses
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.
6 pulses
Loss of ventilation air:
– air loss during pre-ventilation;
– air loss during and after safety time.
7 pulses
Loss of flame during operations:
– poor burner regulation (insufficient gas);
– faulty or soiled gas valves;
– short circuit between ionisation probe and earth.
2sPulses Pulses
RED LED illuminated
press reset for 3 sec.
Interval
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