Burner Start-Up Cycle Diagnostics; Operating Fault Diagnostics - Riello GAS 3/2 Installation And Maintenance Manual

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

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
COLOUR CODE TABLE
Yellow
Press button
for > 3 s
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:
– air pressure switch faulty;
– air pressure switch incorrectly regulated;
– max. air pressure switch triggered (if installed).
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 extraneous light during pre-purging;
– presence of extraneous light during post-purging.
Loss of flame during operations:
– poor burner regulation (insufficient gas);
– faulty or soiled gas valves;
– short circuit between ionisation probe and earth.
– Not used.
– Wiring error or internal fault.
Green Red
Interval
Signal 3 s
PROBABLE CAUSE
43
Colour code
Signal