Riello RS5 TL Installation, Use And Maintenance Instructions page 46

Check that the ionisation probe and the electrode are positioned correctly (see fig. 9, page 9).

Check that the air pressure switch and the gas pressure switch are set correctly.

Let the burner run at full capacity for about ten minutes, setting all the elements correctly as explained in
this manual.
Then carry out the analysis of the combustion by checking:
CO percentage (%);
2
Flue gases temperature at the stack.
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

3 pulses

4 pulses

6 pulses

7 pulses

ATTENTION
To reset the control box after the diagnostics display, press the lockout-reset button.
3095
CO content (ppm);
    
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.
NOx content (ppm);
Interval
Pulses
PROBABLE CAUSE
12 GB
Ionisation current (µA);
2s
Pulses
    