Glow-worm 23c - Manual (Page 29)

29 2000225000B
FAULT: THE BURNER LIGHTS BUT THEN GOES OUT. THERE IS NO FLAME DETECTED.
Check that the gas taps are fully open
Check the gas pressure. NO
YES
The flame is not spreading across
the whole burner and is not reaching
the sensing electrode. Is the gas
pressure correct?
Adjust the low flow setting of the
gas control valve.
Clean the gas filter.
Clean the burner.
FAULT: NO HOT WATER, BUT THE HEATING IS WORKING
Is the cold water inlet tap fully open ?
Is the water pressure greater
than 0.5 bar ?
Open it.
NO
NO
Insufficient water pressure.
The appliance will not operate.
Find out why the pressure is so low.
YES
Is the water flow rate greater
than 1.7l/min. (threshold figure).
NO
Check the cold water inlet filter
for dirt. Is the cold water tap fully open ?
Check the heat exchanger for scaling.
YES
Is flow detector operating ?
NO
Change or clean it.
YES
Check the connectors on the
sense electrode and the
control board (PCB).
If the fault persists, fit a relplacement
control board (PCB).
YES
16 Fault Finding