Riello PRESS 2G - Operating Fault Diagnostics

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GB
Faults - Possible causes - Solutions
9.2 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.
The pulses of the LED constitute a signal spaced by approxi-
mately 3 seconds.
The number of pulses will provide the information on the possible
faults, according to the table below:
RED LED on
wait at least 10s
Press reset
for > 3s
Pulses
Interval
3s
Pulses
 
SIGNAL PROBABLE CAUSE
2 flashes

The flame does not stabilise at the end of the safety time:
– faulty sensor;
– faulty or soiled light-oil valves;
– neutral/phase exchange;
– faulty ignition transformer
– poor burner regulation (insufficient gas oil).
3 flashes

Min. air pressure switch does not close:
– air pressure switch faulty;
– air pressure switch incorrectly regulated;
– max. air pressure switch triggered (if installed).
4 flashes

Min. air pressure switch does not open or light in the chamber before firing:
– air pressure switch faulty;
– air pressure switch incorrectly regulated.
7 flashes

Loss of flame during operations:
– poor burner regulation (insufficient gas oil);
– faulty or soiled gas oil valves;
– short circuit between sensor and earth.
10 flashes


– Wiring error or internal fault.