10 fault finding - pilot – Glow-worm Hideaway 40CF User Manual

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221807B

10 Fault Finding - Pilot

Diagram 10.6

PILOT / IGNITION FAULT FINDING

0905A

START HERE

Check gas line - open all cocks,
rectify any blockages, purge out
any air. Check flue blockage
safety device is reset,
check all thermocouple circuit
connections are clean and in good
condition. Does pilot light?

Does pilot stay alight when
gas valve knob is released?

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?

Pull ignition lead off electrode.
Hold end of lead close to pilot
burner and operate piezo unit.
Is there a spark across gap?

Check electrode gap. Reposition,
or replace electrode as necessary.

Change
piezo unit.

Change
ignition unit.

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?

Does pilot flame
envelope thermocouple?

Apply match to pilot burner instead
of pressing piezo unit button.
Does pilot light?

Undo tubing nut at pilot burner.
Press gas valve knob.
Does gas flow freely?

Undo tubing nut at pilot outlet of
gas valve. Press gas valve knob.
Does gas flow freely?

Rectify blockage in pilot injector,
or renew pilot injector.

Change blocked pilot tube.

Change gas valve.

PILOT SATISFACTORY

YES