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ENGLISH
TROUBLESHOOTING
PROBLEM
POSSIBLE CAUSE
SOLUTION
The equipment goes into “lock-out”
with the flame (red light ON). Fault
in the flame control device.
1) Disturbance to ionisation current from
ignition transformer.
1) Invert the ignition transformer power supply
(230V side) and check using an analogue
micro-ammeter
2) Inefficient flame sensor (ionisation probe) 2) Replace flame sensor
3) Incorrect flame sensor (ionisation probe)
position
3) Correct the position of the flame sensor and then
check its efficiency by connecting the analogue
micro-ammeter
4) Ionisation probe or relative cable discharge
to earth
4) Check visually and using the instrument.
5) Flame sensor electrical connection cut-off. 5) Restore the connection.
6) Inefficient draught or fumes passage
blocked.
6) Ensure that the boiler fumes passage and
chimney connection are free.
7) Flame disk or combustion heads dirty or
worn.
7) Visually check and replace, if necessary.
8) Equipment fault.
8) Replace it.
9) No ionisation.
9) If the “earth” of the equipment is not efficient, the
ionisation current cannot be checked. Check
the efficiency of the “earth” at the terminal
concerned in the equipment and at the “earth”
connection of the electric system.
The apparatus goes into “lock-out”,
gas flows out, but there is no flame
(red light ON). Fault restricted to
ignition circuit.
1) Fault in ignition circuit
1) Check the ignition transformer power supply
(230V) and high voltage circuit (electrode to
earth or isolator broken under locking terminal).
2) Ignition transformer cable discharges to
earth.
2) Replace it.
3) Ignition transformer cable disconnected. 3) Connect it.
4) Faulty ignition transformer.
4) Replace it.
5) The distance between electrode and earth
is incorrect.
5) Position them at the correct distance.
6 ) I s o l a t o r d i r t y, s o e l e c t r o d e
discharges to earth.
6) Clean or change the isolator or electrode.
The equipment goes into “lock-out”,
gas flows out, but there is no flame
(red light ON)
1) Air/gas ratio incorrect.
1) Correct the air/gas ratio (there is probably too
much air or very little gas)
2) Gas piping has not been properly bled of
air (in the case of first ignition).
2) Bleed the gas pipe again, taking great care.
3) The gas pressure is insufficient or
excessive.
3) Check the gas pressure value
at the time of
ignition
(use a water pressure gauge, if
possible).
4) Air passage between disk and head too
narrow.
4) Adjust the disk/head opening.
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