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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.
In the event of a burner lockout, more than two conse-
cutive burner reset operations could cause damage to
the installation. On the third lockout, contact the After-
sales Service.
WARNING
Signal
Once the pre-purging phase
2 blinks
and safety time have passed,
the burner goes into lockout
without the appearance of the
flame
The burner does not switch
3 blinks
on, and the lockout appears
The burner switches on, but
then stops in lockout
Lockout during pre-purging
phase
The burner switches on, but
4 blinks
then stops in lockout
Lockout when burner stops
The burner switches on, but
6 blinks
then stops in lockout
The burner goes into lockout
7 blinks
immediately following the
appearance of the flame
Burner locks out when shift-
ing from minimum to maxi-
mum output and vice versa
Burner goes into lockout dur-
ing operation
The burner does not switch
10 blinks
on, and the lockout appears
The burner goes into lockout
Press button
for > 3 secs
Problem
1
- The operation solenoid lets little gas through . . . . . . . .
2
- One of the two solenoid valves does not open. . . . . . . .
3
- Gas pressure too low . . . . . . . . . . . . . . . . . . . . . . . . . . .
4
- Ignition electrode incorrectly adjusted . . . . . . . . . . . . . .
5
- Electrode grounded due to broken insulation . . . . . . . .
6
- High voltage cable defective . . . . . . . . . . . . . . . . . . . . .
7
- High voltage cable deformed by high temperature . . . .
8
- Ignition transformer defective. . . . . . . . . . . . . . . . . . . . .
9
- Incorrect valve or transformer electrical wiring . . . . . . .
10 - Defective control box . . . . . . . . . . . . . . . . . . . . . . . . . . .
11 - A closed valve upline the gas train . . . . . . . . . . . . . . . .
12 - Air in pipework . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
13 - Gas valves unconnected or with interrupted coil . . . . . .
14 - Air pressure switch in operating position . . . . . . . . . . . .
- Air pressure switch inoperative due to insufficient air
pressure:
15 - Air pressure switch incorrectly adjusted. . . . . . . . . . . . .
16 - Pressure switch pressure test point pipe blocked . . . . .
17 - Poorly adjusted head . . . . . . . . . . . . . . . . . . . . . . . . . . .
18 - High pressure in the furnace . . . . . . . . . . . . . . . . . . . . .
19 - Defective motor control contactor . . . . . . . . . . . . . . . . .
(only three-phase version)
20 - Defective electrical motor. . . . . . . . . . . . . . . . . . . . . . . .
21 - Motor lockout (defective electrical motor) . . . . . . . . . . .
22 - Flame simulation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
23 - Permanent flame in the combustion head or . . . . . . . .
flame simulation
24 - Defective or incorrectly adjusted servomotor. . . . . . . . .
25 - The operation solenoid lets little gas through . . . . . . . .
26 - Ionisation probe incorrectly adjusted . . . . . . . . . . . . . . .
27 - Insufficient ionisation (less than 5 A) . . . . . . . . . . . . . . .
28 - Earth probe . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
29 - Burner poorly grounded . . . . . . . . . . . . . . . . . . . . . . . . .
30 - Phase and neutral connections inverted . . . . . . . . . . . .
31 - Defective flame detection circuit . . . . . . . . . . . . . . . . . .
32 - Too much air or too little gas . . . . . . . . . . . . . . . . . . . . .
33 - Probe or ionisation cable grounded . . . . . . . . . . . . . . . .
34 - Incorrect electrical wiring . . . . . . . . . . . . . . . . . . . . . . . .
35 - Defective control box . . . . . . . . . . . . . . . . . . . . . . . . . . .
36 - Presence of electromagnetic disturbances in . . . . . . . .
the thermostat lines
37 - Presence of electromagnetic disturbance . . . . . . . . . . .
Interval
Signal
3 secs
If further lockouts or burner faults occur, interventions
must only be made by qualified, authorised personnel
(as indicated in this manual, and in compliance with
the laws and regulations currently in force).
DANGER
Possible cause
36
Signal
Recommended remedy
Increase
Replace
Increase pressure at governor
Adjust, see fig. (C) page 14
Replace
Replace
Replace and protect
Replace
Check
Replace
Open
Bleed air
Check connections or replace coil
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 replace
control box
Adjust or replace
Increase
Adjust, see fig. (C) page 14
Check probe position
Withdraw or replace cable
Check grounding
Invert them
Replace the control box
Adjust air and gas
Replace worn parts
Check
Replace
Filter or eliminate
Use the radio disturbance protection kit
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