Napoleon Ultra Chef U405 Manuel D'instructions page 11

Problem
Humming regulator.
Burners will not cross light each
other.
"Paint" appears to be peeling
inside lid or hood.
Burner output on "high" setting
is too low. (Rumbling noise and
fluttering blue flame at burner
surface.)
Infrared burner (if equipped)
flashes back (during operation
the burner abruptly makes a
loud "whoosh" sound, followed
by a continuous blow-torch type
sound and grows dim.)
Pilot will not light.
(if equipped)
Possible Causes
Normal occurrence on hot days.
Plugged ports along back of
burner.
Grease build-up on inside
surfaces.
Lack of gas.
Supply hose is pinched.
Dirty or clogged orifice.
Spider webs or other matter in
venturi tube.
Propane regulator in "low flow"
state.
Ceramic tiles overloaded with
grease drippings and build-up.
Ports are clogged.
Burner overheated due to
inadequate ventilation (too much
grill surface covered by griddle
or pan.)
Cracked ceramic tile.
Leaking gasket surrounding the
ceramic tile, or a weld failure in
the burner housing.
Lack of gas.
Obstruction in pilot orifice.
Electrode wire loose or off.
Dirty pilot electrode.
Pilot is actually lit.
Solution
This is not a defect. It is caused by internal vibrations in the
regulator and does not affect the performance or safety of the
gas grill. Humming regulators will not be replaced.
Clean burner ports. See burner maintenance instructions.
This is not a defect. The finish on the lid and hood is porcelain,
and will not peel. The peeling is caused by hardened grease,
which dries into paint-like shards, that flake off. Regular
cleaning will prevent this. See cleaning instructions.
Check gas level in propane cylinder.
Reposition supply hose as necessary.
Clean burner orifice.
Clean out venturi tube.
Ensure lighting procedure is followed carefully. All gas grill
valves must be in the off position when the tank valve is turned
on. Turn tank on slowly to allow pressure to equalize. See
lighting instructions.
Turn burner off and allow to cool for at least two minutes.
Relight burner and burn on high for at least five minutes or
until the ceramic tiles are evenly glowing red.
Ensure that no more than 75% of the grill surface is covered by
objects or accessories. Turn burner off and allow to cool for at
least two minutes, then relight.
Allow burner to cool and inspect very closely for cracks. If any
cracks are found, contact your authorized Ultra Chef dealer to
order a replacement burner assembly.
Contact your authorized Ultra Chef dealer for instructions on
ordering a replacement burner assembly.
After turning pilot knob to high, wait approximately 20-30
seconds for air to purge the gas supply line while pressing
igniter. Fill propane cylinder. During initial set-up or after tank
has been refilled, it is best to light one of the tube burners
before lighting the pilot burner. This enables the gas to reach
the valves on the manifold more quickly.
Clean pilot orifice.
Replace lead wire.
Clean pilot electrode.
The pilot flame, especially on natural gas units is very difficult
to see. Place your hand 1 in. (2.5 cm) above grill surface over
the pilot burner to feel for heat.
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