Glow-worm 23c - Manual (Page 30)

30 2000225000B
FAULT: THE BURNER LIGHTS, THEN GOES OUT.
CHECK
THE
PROBE
CHECK THE MAINS
FAULT NOT FOUND
The flame is spreading across the
whole burner, but not being detected.
Check the earth: no power and neutral
Note: the boiler is independent of
phase and neutral; reversing phase
and neutral on the electric plug will
have no effect.
With the power turned off, check the
resistance between the spark electrode
and terminal H23 on the control board
(PCB). Check the connector on the end
of the wire.
Check that the spark electrode is
pointing towards the flame.
Check the spark electrode. Change it.
If the problem persists, change the
control board (PCB).
(flame detection module faulty).
Check the 230V mains supply.
16 Fault Finding
FAULT: THE BURNER DOES NOT LIGHT AT ALL, BUT THERE IS AN IGNITION SPARK.
NO
NO
YES
YES
Are the gas taps on?
Test the gas control valve.
Turn on the gas taps.
Check the wiring.
If the problem persists, change the
control board (PCB). Is there 24Vdc at the
gas control valve?
Check resistance of safety valve coil.