25
20011757
GB
Maintenance
9.4
Control box visual diagnostics
The control box features a diagnostics function through which any causes of malfunctioning can be identified (indicator:
RED LED
).
To use this function, you must press and hold the reset button for at least 3 seconds once it has entered the safety condition (
lockout
).
The control box generates a sequence of led pulses, which is repeated at constant 2-second intervals.
The sequence of led pulses issued by the control box identifies the possible types of malfunction, which are listed in the table below.
9.4.1
Led colour code of the control box reset button
(*) only for applications provided for.
RED LED illuminated
press and hold reset for 3 sec.
Led pulses
Interval
2s
Led pulses
SIGNAL
PROBABLE CAUSE
2 led pulses
The flame does not stabilise at the end of the safety time:
– flame detector defective or dirty;
– oil valve defective or dirty;
– faulty ignition transformer;
– badly regulated burner.
4 led pulses
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.
7 led pulses
Loss of flame during operation:
– badly adjusted burner;
– oil valve defective or dirty;
– flame detector defective or dirty;
8 led pulses
Check and control of the oil heater (if there is one):
– faulty control thermostat or heater.
WARNING
To reset the control box after visual diagnostics have been displayed, you must press the reset button.
Operation status
LED colour codes
Blinking
speed
ON
OFF
Seconds
Wait
LED off
Preheating
Yellow
Pre-purging
Green
Long pre-purging
Green
Transformer turn on
Green + Yellow blinking
Fast
0.3
0.3
Flame regular
Green + Yellow blinking
Slow
0.3
2
Post-purging
Green+Yellow
Recycle
Green + Yellow blinking
Medium
2
1
Continuous purging(
*
)
Green
Extraneous light during preheating or wait
Yellow blinking
Fast
0.3
0.3
Extraneous light during post or continuous purging (
*
)
Green + Yellow blinking
Fast
0.3
0.3
Extraneous light in block
Red + Yellow blinking
Fast
0.3
0.3
Block
Red
Block with continuous purging (
*
)
Red + Green