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FAULTS/SUGGESTED REMEDIES
The control box supplied performs a diagnostic role by means of which it is possible to easily identify the possible causes of any malfunctions
(signal: RED LED).
In order to use this function, it is necessary to wait at least ten seconds from the moment the control box is put in safety mode and press the lock-
out reset button for a minimum of three seconds.
Once the button has been released, the RED LED will start to flash, as illustrated in the diagram below.
RED LED on
wait at least 10 secs
The pulses of the LED constitute a signal spaced by approximately 3 seconds.
The number of pulses will provide the information on the possible faults, according to the table below.
SIGNAL
MALFUNCTION
2 flashes
The burner starts up
but halts in lock out at
the end of the safety
period without any
flame appearing.
3 flashes
The burner starts up,
remains in pre-
purging and after 95
seconds goes into
lock-out
4 flashes
The burner does not
start and the lock-out
appears after approxi-
mately 60 secs
5 flashes
The burner starts up
but halts in lock out
7 flashes
The burner goes into
lock-out straight after
the flame appears
18 flashes
While in operation the
burner halts in lock-
out
19 flashes
Pre-purging starts
and lock-out occurs
straight away
20 flashes
The electric control
box does not unlock
No flash
The burner fails to
start up
No flash
The burner continues
to repeat the start
cycle without lock-out
No flash
Firing at pulses
Press button
for > 3 secs
Signal
PROBABLE CAUSE
1 - Failure of the flame sensor circuit . . . . . . . . . . . . . . Replace the control box
2 - Fault on solenoid valve . . . . . . . . . . . . . . . . . . . . . . Replace solenoid valve
3 - Burner calibration incorrect . . . . . . . . . . . . . . . . . . . Calibrate burner (air-gas mix)
4 - High voltage lead disconnected . . . . . . . . . . . . . . . Check connection in the head
5 - Probe lead disconnected. . . . . . . . . . . . . . . . . . . . . Check connection in the head
6 - The neutral and phase connections are inverted . . Invert the power supply.
7 - Ignition transformer faulty . . . . . . . . . . . . . . . . . . . . Replace it
8 - Servomotor lock-out during the return. . . . . . . . . . . Unlock it or replace it
of the MAX output to Min output
Minimum air pressure switch fails to close:
9 - Pressure switch fault . . . . . . . . . . . . . . . . . . . . . . . . Replace it
10 - Air pressure switch badly adjusted . . . . . . . . . . . . . Adjust it
11 - Pressure tap tube of pressure switch obstructed . . Clean it
12 - Head badly adjusted . . . . . . . . . . . . . . . . . . . . . . . . Adjust it
13 - Electric motor faulty. . . . . . . . . . . . . . . . . . . . . . . . . Replace it
14 - Flame presence at start. . . . . . . . . . . . . . . . . . . . . . Check the valve tightness
Minimum air pressure switch fails to open:
15 - Servomotor fault . . . . . . . . . . . . . . . . . . . . . . . . . . . Replace it
16 - Air pressure switch badly adjusted . . . . . . . . . . . . . Adjust it or replace it
17 - Flame presence during pre-purging . . . . . . . . . . . . Check the valve tightness
18 - Fault on electric control box . . . . . . . . . . . . . . . . . . Replace control box
19 - Head badly adjusted . . . . . . . . . . . . . . . . . . . . . . . . Adjust it
20 - Solenoid valve faulty (too little gas). . . . . . . . . . . . . Replace it
21 - Probe earthed . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Move it away or replace lead
Minimum air pressure switch opens during operation:
22 - Air pressure switch badly adjusted . . . . . . . . . . . . . Adjust it
23 - Connections wrong . . . . . . . . . . . . . . . . . . . . . . . . . Check connections
24 - Solenoid valve not connected or interrupted . . . . . . Check solenoid valve
25 - Electric control box faulty . . . . . . . . . . . . . . . . . . . . Replace it
26 - No electricity . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Close the switches - Check the con-
27 - A limit or safety remote control device is open . . . . Adjust it or replace it
28 - Control box lock-out . . . . . . . . . . . . . . . . . . . . . . . . Unlock control box
29 - No gas . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Open the manual valves between the
30 - Insufficient gas pressure in mains . . . . . . . . . . . . . . Contact GAS COMPANY
31 - Minimum gas pressure switch fails to close . . . . . . Adjust it or replace it
32 - Flame present on halting. . . . . . . . . . . . . . . . . . . . . Check solenoid valve
33 - Servomotor lock-out during the opening . . . . . . . . . Unlock it or replace it
of the air gate valve (0-90°)
34 - The pressure of the gas in the mains is near . . . . . Reduce the operation pressure of the
the value at which the minimum gas pressure
switch is set. The sudden fall in pressure which
follows the opening of the valve provokes the
temporary opening of the pressure switch itself, the
valve closes straight away and the burner halts.
The pressure starts to increase again, the pressure
switch closes again and makes the start cycle repeat once again. On so on.
35 - Head badly adjusted . . . . . . . . . . . . . . . . . . . . . . . . Adjust it
36 - Ignition electrode badly adjusted. . . . . . . . . . . . . . . Adjust it
37 - Fan damper badly adjusted, too much air . . . . . . . . Adjust it
38 - Power on firing up too high . . . . . . . . . . . . . . . . . . . Reduce it
34
Interval
3 secs
Signal
SUGGESTED REMEDY
With the power supply phase-phase or
neutral with voltage ≥ 10 V insert the
RC cod. 3012171 filter.
nection
meter and train
minimum gas pressure switch.
Replace the gas filter cartridge.
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