25
20098582
GB
Start-up, calibration and operation of the burner
6.6
Burner start-up cycle diagnostics
During start-up, indication is according to the Tab. N:
Tab. N
6.7
Operating fault diagnostics
The control box has a self-diagnostic system, which easily al-
lows 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:
Tab. O
COLOUR CODE TABLE
Sequences
Colour code
Pre-purging
● ● ● ● ● ● ● ● ● ● ●
Ignition phase
● ❍ ● ❍ ● ❍ ● ❍ ● ❍ ●
Operation, flame ok
❑ ❑ ❑ ❑ ❑ ❑ ❑ ❑ ❑ ❑ ❑ ❑
Operating with weak flame signal
❑ ❍ ❑ ❍ ❑ ❍ ❑ ❍ ❑ ❍
Electrical supply lower than ~ 170V
● ▲ ● ▲ ● ▲ ● ▲ ● ▲ ●
Lock-out
▲ ▲ ▲ ▲ ▲ ▲ ▲ ▲ ▲ ▲
Extraneous light
▲ ❑ ▲ ❑ ▲ ❑ ▲ ❑ ▲ ❑ ▲
Key:
❍
Off
●
Yellow
❑
Green
▲
Red
RED LED on
wait at least 10 s
Press button
for > 3 s
Signal
Signal
Interval
3 s
SIGNAL
PROBABLE CAUSE
2 flashes
The flame does not stabilise at the end of the safety time:
– faulty photocell;
– faulty or soiled light-oil valves;
– neutral/phase exchange;
– faulty ignition transformer
– poor burner regulation (insufficient light 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 light oil);
– faulty or soiled light oil valves;
– short circuit between photocell and earth.
10 flashes
– Wiring error or internal fault.