Glow-worm Swift flow 80 Instructions For Use Installation And Servicing page 32

PILOT WILL NOT LIGHT
START HERE
Check gas line-open all cocks,
rectify any blockages, purge out
any air. Does pilot light?
NO
Apply match to pilot burner instead
of pressing piezo unit button.
Does pilot light?
NO
Undo tubing nut at pilot burner.
Turn gas valve knob to Pilot/Ign.
Press multi-functional control knob.
Does gas flow freely?
NO
Rectify blockage in pilot injector,
or renew pilot injector.
Undo tubing nut at pilot outlet
of the multi-functional control.
Press gas valve knob.
Does gas flow freely?
NO
Change blocked pilot tube.
Change multi-functional control.
221469B
3 Fault Finding
YES
YES
YES
YES
32
Does pilot stay alight when
multi-functional control
knob is released?
NO
PILOT SATISFACTORY
Does pilot flame envelop
thermocouple?
NO
Check aeration. If necessary - Clean
pilot, rectify blockage in pilot
injector, or replace.
Check thermocouple circuit using
Thermocouple fault finding diagram.
On pressing piezo unit button is
there a spark across electrode
gap?
NO
Pull ignition lead off electrode.
Hold end of lead close to pilot
burner and operate piezo unit.
Is there a spark across gap?
NO
Pull ignition lead off piezo unit.
Using blade of a screwdriver, touch
unit chassis and leave approx.
4mm gap from connection tag on
piezo unit. Operate piezo.
Is there a spark across gap?
NO
Change Change
piezo unit. ignition lead.
Check electrode gap. Reposition,
orreplace electrode as necessary.
YES
YES
YES
YES
YES
Diagram 3.2