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TWO-STAGE GAS BURNERS: TROUBLE-SHOOTING GUIDE
DETAILS OF PROBLEM
POSSIBLE CAUSE
SOLUTION
The apparatus goes into “lock-
out” with the flame (red light on).
Fault restricted to flame control
device
1)
Disturbance to ionization current from igni
-
tion transformer..
1)
Invert the ignition transformer power supply
(230V side) and check using an analog micro-
ammeter.
2) Flame sensor (ionization probe) ineffi
-
cient
.
2) Replace flame sensor
3) Flame sensor (ionization probe) position
incorrect.
3) Correct the position of the flame sensor, and
then check its efficiency by inserting the analog
micro-ammeter..
4)
Ionization probe or relative earth cable.
4)
Check visually and using the instrument.
5) Electrical connection cut-off by flame
sensor.
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
9)
No ionization.
9)
If the “earth” of the apparatus is not efficient,
do not check the ionization current. Check
the efficiency of the “earth” at the terminal
concerned of the apparatus 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.
3) Ignition transformer cable disconnected..
3) Connect..
4)
Ignition transformer faulty.
4)
Replace.
5) The distance between electrode and earth
is incorrect.
5) Position at the correct distance
6) Isolator dirty, so electrode discharges to
earth. .
6) Pulire o sostituire l’isolatore e l’elettrodo.
The apparatus 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 pipe 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 exces
-
sive..
3) Check the maximum gas pressure value at the
time of ignition (use a water pressure gauge,
if possible).
4)
Air flow between disk and head too nar
-
row.
4)
Adjust the disk/head opening..
