3159
13
NORMAL OPERATION / FLAME DETECTION TIME
The control box has a further function to guarantee the correct burner operation (signal:
GREEN LED
perma-
nently on). To use this function, wait at least ten seconds from the burner ignition and then press the control box
button for a minimum of 3 seconds. After releasing the button, the GREEN LED starts flashing as shown in the
figure below.
GREEN LED on
wait at least 10s
Press reset
for > 3s
Pulses
Interval
3s
Pulses
The pulses of the LED constitute a signal spaced by approximately 3 seconds.
The number of pulses will measure the probe DETECTION TIME since the opening of gas valves, according to
the following table:
SIGNAL
FLAME DETECTION TIME
This is updated in every burner start-up. Once read, the
burner repeats the start-up cycle by briefly pressing the
control box button.
WARNING
If the result is > 2s, ignition will be retarded. Check the
adjustment of the hydraulic brake of the gas valve, the
air damper and the combustion head adjustment.
1 blink
0.4s
2 blinks
0.8s
6 blinks
2.8s
No blink
Ignition with pulsa-
tions
Poorly adjusted head
Adjust
Ignition electrode incorrectly adjusted
Adjust
Incorrectly adjusted fan air damper: too
much air
Adjust
Output during ignition phase is too high
Reduce
The burner does not
move into the 2nd
stage
Remote control device TR fails to close
Adjust or replace
Defective control box
Replace
Defective servomotor
Replace
Burner stops with air
damper open
Defective servomotor
Replace
Signal
Problem
Possible cause
Recommended remedy
