18
Signal
Problem
Possible cause
Recommended remedy
2 blinks
Once the pre-purging phase
and safety time have passed,
the burner goes into lockout
without the appearance of the
flame
1
- The operation solenoid lets little gas through . . . . . . . .
Increase
2
- One of the two solenoid valves does not open. . . . . . . .
Replace
3
- Gas pressure too low . . . . . . . . . . . . . . . . . . . . . . . . . . .
Increase pressure at governor
4
- Ignition electrode incorrectly adjusted . . . . . . . . . . . . . .
Adjust
5
- Electrode grounded due to broken insulation . . . . . . . .
Replace
6
- High voltage cable defective . . . . . . . . . . . . . . . . . . . . .
Replace
7
- High voltage cable deformed by high temperature . . . .
Replace and protect
8
- Ignition transformer defective. . . . . . . . . . . . . . . . . . . . .
Replace
9
- Incorrect valve or transformer electrical wiring . . . . . . .
Check
10 - Defective control box . . . . . . . . . . . . . . . . . . . . . . . . . . .
Replace
11 - A closed valve upline the gas train . . . . . . . . . . . . . . . .
Open
12 - Air in pipework . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Bleed air
13 - Gas valves unconnected or with interrupted coil . . . . . .
Check connections or replace coil
3 blinks
The burner does not switch
on, and the lockout appears
14 - Air pressure switch in operating position . . . . . . . . . . . .
Adjust or replace
The burner switches on, but
then stops in lockout
- Air pressure switch inoperative due to insufficient air
pressure:
15 - Air pressure switch incorrectly adjusted. . . . . . . . . . . . .
Adjust or replace
16 - Pressure switch pressure test point pipe blocked . . . . .
Clean
17 - Poorly adjusted head . . . . . . . . . . . . . . . . . . . . . . . . . . .
Adjust
18 - High pressure in the furnace . . . . . . . . . . . . . . . . . . . . .
Connect air pressure switch to fan suction
line
Lockout during pre-purging
phase
19 - Defective motor control contactor . . . . . . . . . . . . . . . . .
(only three-phase version)
Replace
20 - Defective electrical motor. . . . . . . . . . . . . . . . . . . . . . . .
Replace
21 - Motor lockout (defective electrical motor) . . . . . . . . . . .
Replace
4 pulses
The burner switches on, but
then stops in lockout
22 - Flame simulation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Replace the control box
Lockout when burner stops
23 - Permanent flame in the combustion head or . . . . . . . .
flame simulation
Eliminate persistence of flame or replace
control box
6 blinks
The burner switches on, but
then stops in lockout
24 - Defective or incorrectly adjusted servomotor. . . . . . . . .
Adjust or replace
7 blinks
The burner goes into lockout
immediately following the
appearance of the flame
25 - The operation solenoid lets little gas through . . . . . . . .
Increase
26 - Ionisation probe incorrectly adjusted . . . . . . . . . . . . . . .
Adjust
27 - Insufficient ionisation (less than 5 A) . . . . . . . . . . . . . . .
Check probe position
28 - Earth probe . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Withdraw or replace cable
29 - Burner poorly grounded . . . . . . . . . . . . . . . . . . . . . . . . .
Check grounding
30 - Phase and neutral connections inverted . . . . . . . . . . . .
Invert them
31 - Defective flame detection circuit . . . . . . . . . . . . . . . . . .
Replace the control box
Burner locks out when shift-
ing from minimum to maxi-
mum output and vice versa
32 - Too much air or too little gas . . . . . . . . . . . . . . . . . . . . .
Adjust air and gas
Burner goes into lockout dur-
ing operation
33 - Probe or ionisation cable grounded . . . . . . . . . . . . . . . .
Replace worn parts
10 blinks
The burner does not switch
on, and the lockout appears
34 - Incorrect electrical wiring . . . . . . . . . . . . . . . . . . . . . . . .
Check
The burner goes into lockout
35 - Defective control box . . . . . . . . . . . . . . . . . . . . . . . . . . .
Replace
36 - Presence of electromagnetic disturbances in . . . . . . . .
the thermostat lines
37 - Presence of electromagnetic disturbance . . . . . . . . . . .
Filter or eliminate
Use the radio disturbance protection kit
No blink
The burner does not start
38 - No electrical power supply . . . . . . . . . . . . . . . . . . . . . . .
Close all switches - Check connections
39 - A limiter or safety control device is open . . . . . . . . . . . .
Adjust or replace
40 - Line fuse blocked . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Replace
41 - Defective control box . . . . . . . . . . . . . . . . . . . . . . . . . . .
Replace
42 - No gas supply . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Open the manual valves between contactor
and train
43 - Mains gas pressure insufficient . . . . . . . . . . . . . . . . . . .
Contact your GAS COMPANY
44 - Minimum gas pressure switch fails to close. . . . . . . . . .
Adjust or replace
45 - Servomotor fails to move to min. ignition position . . . . .
Replace
The burner continues to
repeat the start-up cycle,
without lockout
46 - The gas pressure in the gas mains lies very close to the
value to which the minimum gas pressure switch has
been set. The sudden drop in pressure after valve open-
ing causes temporary opening of the pressure switch
itself, the valve immediately closes and the burner
comes to a halt. Pressure increases again, the pressure
switch closes again and the ignition cycle is repeated.
And so on
Reduce the minimum gas pressure switch
intervention pressure. Replace the gas filter
cartridge.
Ignition with pulsations
47 - Poorly adjusted head . . . . . . . . . . . . . . . . . . . . . . . . . . .
Adjust
48 - Ignition electrode incorrectly adjusted . . . . . . . . . . . . . .
Adjust
49 - Incorrectly adjusted fan air damper: too much air . . . . .
Adjust
50 - Output during ignition phase is too high. . . . . . . . . . . . .
Reduce
Burner does not reach maxi-
mum output
51 - Remote control device TR fails to close. . . . . . . . . . . . .
Adjust or replace
52 - Defective control box . . . . . . . . . . . . . . . . . . . . . . . . . . .
Replace
53 - Defective servomotor . . . . . . . . . . . . . . . . . . . . . . . . . . .
Replace
Burner stops with air damper
open
54 - Defective servomotor . . . . . . . . . . . . . . . . . . . . . . . . . . .
Replace
