Riello 466 M1 Installation, Use And Maintenance Instructions page 50

4.9 BURNER START-UP CYCLE DIAGNOSTICS
uring start-up, indication is according to the follow in table:
D
Sequences
Pre-purging
Ignition phase
Operation, flame ok
Operating with weak flame signal
Electrical supply lower than ~ 170V
Lock-out
Extraneous light
Key:  Off
4.10 OPERATING FAULT DIAGNOSTICS
The control box has a self-diagnostic system, which easily allows identifying the operating faults (RED LED
signal).
ITo 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
2915842
COLOUR CODE TABLE
 Yellow
Press button
for > 3 s
The flame does not stabilise at the end of the safety time:
– faulty flame sensor;
– faulty or soiled oil valves;
– faulty ignition transformer
– poor burner regulation.
– Not used.
– Light in the chamber before firing.
Loss of flame during operations:
– poor burner regulation;
– faulty or soiled oil valves.
– Oil enabling thermostat fault;
– Break in heating elements.
– Wiring error or internal fault;
– Presence of electromagnetic disturbance: use the radio disturbance protection
kit
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 Green  Red
Interval
Signal 3 s
PROBABLE CAUSE
12 GB
Colour code
Signal