Glow-worm 23c - Manual (Page 32)

32 2000225000B
FAULT: THE FAN DOES NOT START.
Check the power from the room thermostat.
Replace the interface board or
control board (PCB). NO
YES
Does the warning light flash 45 seconds
after the start of the demand?
Check the fan (loose terminal
connector, windings burnt out).
Interface board or control board (PCB).
FAULT: THE FAN RUNS BUT THERE ARE NO SPARKS.
Thermistor.
Control board (PCB).
Air flow switch take-off.
CONNECTIONS TO THE AIR PRESSURE SWITCH
Pr
3
2 1
P2
P1
L H
Electrical contacts.
NO
YES
Does the warning light flash 45 seconds
after the start of the demand?
Check the pressure drop on the
flue pipe.
Is the plastic tube on the correct pressure
connection of the air pressure switch?
Are the electrical connections in place. NO The air flow switch is not operating or
is unplugged.
16 Fault Finding