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3.12 IGNITION SYSTEM FAULTS
a) If spark igniter does not light pilot, check for a spark
and gas. If no spark is evident inspect electrode to
ensure ceramic is not cracked and that igniter lead is
correctly located. Check insulation on lead for damage
also. Use an insulated screwdriver to form a spark gap
and check igniter operation (see Figure 3).
Having established a spark, check gas flow to pilot by
lighting with a taper. If there is no gas, inspect that pilot
injector is not blocked.
b) If spark ignites pilot but goes out when knob is
released, ensure FFD operates correctly by following
procedure detailed in Section 3.13
Spark gap 4mm
Thermocouple
Thermocouple
retaining nut
Figure 3
Electrode
retaining nut
Pilot pipe
retaining nut
3.13 FLAME FAILURE DEVICE FAULTS
It is IMPORTANT that pilot burner is kept clean and
properly adjusted. Frequency of cleaning will depend on
the prevailing conditions in the kitchen.
Should FFD fail to engage, the following points should be
checked. Details of access to individual components can
be found in Section 3.
1. Ensure gas supply to appliance is turned ON.
2. Check pilot gas supply to ensure connecting pipes
and/or pilot burner injector are not blocked.
3. Check position of pilot flame in relation to
thermocouple. Flame should envelop and heat 10mm
of thermocouple tip. Thermocouple tip should be at
flame centre.
Electrode
4. Ensure thermocouple is located firmly in the seating on
pilot burner. Take care not to overtighten clamping
screw retaining nut.
5. Check thermocouple connections to valve is clean and
that satisfactory contact is made. The nut should be
screwed, finger tight into valve and a further sixth of a
spanner
The connection MUST NOT BE OVER-TIGHTENED
as this may cause damage to valve or thermocouple.
No thread compound should be used as this is an
electrical connection.
6. Press burner tap knob IN, turn to ignition setting and
hold. Press igniter button fully in and release it.
Check resultant spark has lit pilot burner.
If electrode fails to spark, check both electrode and
igniter (see Section 3.12). If either component is faulty,
pilot may be lit with a taper.
With pilot established, continue to hold tap knob IN for a
further 20 seconds then release. The pilot should now
remain lit.
Should appliance fail to respond to these checks then a
replacement FFD magnet unit or thermocouple is
required.
SECTION 4 - SPARE PARTS
When ordering spares, always quote unit type and
serial number.
This information will be found on the data plate.
turn
(one
spanner
flat)
to
secure.
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