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8.5
Software diagnostics
Gives an analysis of the life of the burner, through optical connec-
tions with a PC showing the working hours, number and types of
lockout, control box serial number etc.
To view diagnostics, proceed as follows:
Hold the button down for more than 3 seconds once the red
LED (burner lockout) remains steadily lit.
A yellow light blink to tell you the operation is done.
Release the button for 1 second and then press again for
over 3 seconds until the yellow light blinks again.
Pressing the button
From 1 to 3 seconds
More than 3 seconds
More than 3 seconds starting from the
condition of visual diagnostics
The sequence of led pulses issued by the control box identifies
the possible types of malfunction, which are listed in the table
Tab. P.
Signal
Problem
2 blinks
Once the pre-purging
phase and safety time
have passed, the burner
goes into lockout with-
out the appearance of
the flame
3 blinks
The burner does not
switch on, and the lock-
out appears
The burner starts and
then goes into lockout
Lockout
purging phase
4 blinks
The burner starts and
then goes into lockout
Lockout when the burn-
er stops
6 blinks
The burner switches on,
but then stops in lockout
20054100
Faults - Possible causes - Solutions
Control box status
Reset of the control box without showing the visual diagnostics
Visual diagnostics of the lockout condition:
(LED blinks at 1-second intervals)
Software diagnostics, with the help of optical interface and PC (possibility to visual-
ise the working hours, irregularities, etc.)
Possible cause
The operation solenoid lets little gas through
One of the two solenoid valves does not open
Gas pressure too low
Ignition electrode incorrectly adjusted
Electrode grounded due to broken insulation
High voltage cable defective
High voltage cable deformed by high tempera-
ture
Faulty ignition transformer
Incorrect valve or transformer electrical wiring
Defective control box
A closed valve upline the gas train
Air in pipework
Gas valves unconnected or with interrupted coil Check connections or replace coil
Air pressure switch in operating position
Air pressure switch inoperative due to insufficient air pressure:
Air pressure switch poorly adjusted
Pressure switch pressure point pipe blocked
Poorly adjusted head
High pressure in the furnace
during
pre-
Defective motor control contactor
Defective electrical motor
Motor lockout
Flame simulation
Permanent flame in the combustion head or
flame simulation
Defective or incorrectly adjusted servomotor
Once the button is released, the red LED will flash intermit-
tently with a higher frequency: only now can the optical link
be activated.
Once the operations are done, the control box's initial status must
be restored using the resetting procedure described above.
34
GB
Recommended remedy
Increase
Replace them
Increase pressure at governor
Adjust it
Replace
Replace
Replace and protect
Replace
Check
Replace
Open
Bleed air
Adjust or replace
Adjust or replace
Clean
Adjust
Connect air pressure switch to fan
suction line
Replace
Replace
Replace
Replace the control box
Eliminate persistence of flame or re-
place control box
Adjust or replace
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