Riello 3433723 Installation, Use And Maintenance Instructions page 26

4.7 BURNER START-UP CYCLE DIAGNOSTICS
During start-up, indication is according to the followin table:
Sequences
Pre-purging
Ignition phase
Operation, flame ok
Operating with weak flame signal
Electrical supply lower than ~ 170V
Lock-out
Extraneous light
Key: Off
4.8 OPERATING FAULT DIAGNOSTICS
The control box has a self-diagnostic system, which easily allows identifying the operating faults (RED LED
signal).
To use this function, wait at least ten seconds from the safety lock out, and then press the reset button for
a minimum of 3 seconds.
After releasing the button, the RED LED starts flashing as shown in the diagram below.
RED LED on
wait at least 10 s
The pulses of the LED constitute a signal spaced by approximately 3 seconds.
The number of pulses will provide the information on the possible faults, according to the table below:
SIGNAL
2 flashes

3 flashes

4 flashes

7 flashes

8 flashes

10 flashes

5827
COLOUR CODE TABLE
Yellow
Press button
for > 3 s

PROBABLE CAUSE
The flame does not stabilise at the end of the safety time:
– faulty photocell;
– faulty or soiled oil valves;
– neutral/phase exchange;
– faulty ignition transformer
– poor burner regulation (insufficient heavy oil).
Min. air pressure switch (if installed) does not close:
– air pressure switch faulty;
– air pressure switch incorrectly regulated;
– max. air pressure switch triggered (if installed).
Min. air pressure switch (if installed) does not open or light in the chamber
before firing:
– air pressure switch faulty;
– air pressure switch incorrectly regulated.
Loss of flame during operations:
– poor burner regulation (insufficient heavy oil);
– faulty or soiled oil valves;
– short circuit between photocell and earth.
– Faulty thermostat for oil permissive signal;
– Heating resistances blown.
– Wiring error or internal fault.
Green Red
Interval
Signal 3 s
   
8
GB
Colour code
Signal
    