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TROUBLESHOOTING INSTRUCTIONS
ANOMALY
Appliance locked out due to no flame
(red light lit).The fault is in the flame
control device.
The burner goes into “lock-out”, gas
flows, but there is no flame (red light
on).Fault in ignition circuit.
The burner goes into “lock-out”, gas
flows, but there is no flame (red light
on).
POSSIBLE CAUSE
1
Disturbance to ionisation current from
the ignition transformer.
2
Flame sensor (ionisation probe)
inefficient.
3
Flame sensor (ionisation probe)
position incorrect.
4
Ionisation probe or relative ground
cable.
5
Electrical connection cut-off by flame
sensor.
6
Inefficient draught or fumes passage
blocked.
7
Flame disc or combustion heads dirty
or worn.
8
Faulty equipment.
9
No ionisation.
1
Fault in ignition circuit
2
Ignition transformer cable discharges
to earth.
3
Ignition cable disconnected.
4
Ignition transformer faulty.
5
The distance between electrode and
ground is incorrect.
6
Isolator dirty, and electrode
discharges to earth.
1
Air/gas ratio incorrect.
2
Gas pipe has not been properly bled
of air (in the case of first ignition).
3
The gas pressure is insufficient or
excessive.
4
Air flow between disc and head too
narrow.
REMEDY
1
Invert the ignition transformer power
supply (230V side) and check using an
analogue micro-ammeter.
2
Replace flame sensor.
3
Correct the position of the flame sensor,
and then check for its efficiency by
connecting the analogue micro-ammeter.
4
Check visually and using the instrument.
5
Restore the connection.
6
Ensure that the boiler fumes passage and
chimney connection are free.
7
Visually check and replace, if necessary.
8
Replace it.
9
If the “ground” of the equipment is
not efficient, there is no ionisation
current.Check the efficiency of the
“earth” at the terminal concerned in the
equipment and at the “earth” connection of
the electrical system.
1
Check the ignition transformer power
supply (230V) and high voltage circuit
(electrode to earth or isolator broken
under locking terminal).
2
Replace it.
3
Connect.
4
Replace it.
5
Position at the correct distance.
6
Clean or change the isolator or electrode.
1
Correct the air/gas ratio (there is probably
too much air or very little gas).
2
Bleed out the gas pipe again, taking great
care.
3
Check the maximum gas pressure
value at the time of ignition (use a water
pressure gauge, if possible).
4
Adjust the disc/head opening.
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