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INSTRUCTIONS FOR DETERMINING THE CAUSE LEADING TO IRREGULARITIES IN THE
OPERATION AND THEIR ELIMINATION
IRREGULARITY
Appliance locks 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 ionization current from
the ignition transformer.
2 Flame sensor (ionization probe)
inefficient.
3 Flame sensor (ionisation probe)
position incorrect.
4 Ionization probe or relative ground
cable.
5 Electrical connection cut-off by flame
sensor.
6 Inefficient draught or fumes passage
blocked.
7 Flame disk or combustion heads dirty or
worn.
8 Equipment fault.
9 No ionization.
1 Fault in ignition circuit
2 Ignition transformer cable discharges to
earth.
3 Ignition cable disconnected.
4 Ignition transformer is faulty.
5 The distance between electrode and
ground is incorrect.
6 Insulator dirty, so electrode discharges
to ground.
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 disk and head too
narrow.
REMEDY
1 Invert the ignition transformer power supply
(230V side) and check using an analogue
micro-ammeter.
2 Replace the flame sensor.
3 Correct the position of the flame sensor, and
then check 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 “earth” of the equipment is not
efficient, do not check the ionization
current.Check the efficiency of the “earth”
at the terminal concerned in the equipment
and at the “earth” connection of the electric
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 it.
4 Replace it.
5 Position it at the correct distance.
6 Clean or change the insulator or electrode.
1 Correct the air/gas ratio (there is probably
too much air or very little gas)
2 Bleed the gas pipe again, with due caution.
3 Check the maximum gas pressure value at
the time of ignition (use a water pressure
gauge, if possible).
4 Adjust the disk/head opening.
Summary of Contents for TBG 45 PV
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