Glow-worm COMPACT 100p Instructions For Installation And Operation Manual page 26

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
Rectify or replace
blocked pilot tube.
Change multi-functional control.
PILOT FAULT FINDING
221680G
13 Fault Finding
YES
YES
YES
YES
Repair or replace earth lead.
Pull ignition lead off electrode. Hold end of
lead close to pilot burner and operate
piezo unit. Is there a spark across gap?
Pull ignition lead off piezo unit.
Using blade of a screwdriver, touch unit
chassis and leave approx. 4mm gap from
connection tag onpiezo unit. Operate piezo.
Is there a spark across gap?
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
Is there continuity of piezo earth?
NO
NO
NO
Change
piezo unit.
Check electrode gap. Reposition,
or replace electrode as necessary.
26
YES
YES
YES
YES
YES
YES
Change
ignition lead.
Diagram 13.3