Napoleon LHD45N Installation And Operating Instructions Manual page 52

52
SYMPTOM
Carbon is being
deposited on
glass, logs,
rocks, media
or combustion
chamber surfaces.
Continues to
spark and pilot
lights, but main
burner will not
light.
Pilot lights
Stops sparking
/ pilot remains lit
but burner will
not turn on.
Exhaust fumes
smelled in room,
headaches.
W415-0834 / C / 02.03.12
PROBLEM
Air shutter has become
blocked.
Flame is impinging on the
glass, logs, rocks, media
or combustion chamber.
Short or loose
connection in sensor rod.
Poor fl ame rectifi cation
or contaminated
sensor rod.
Poor grounding between
pilot assembly and
gas valve.
Damaged pilot or dirty
sensor rod.
Wiring / Connection.
Wiring harness.
Appliance is spilling.
TEST SOLUTION
- Ensure air shutter opening is free of lint or other
obstructions.
- Check that the glass, logs, rocks or media are
correctly positioned.
- Open air shutter to increase the primary air.
- Check the input rate: check the manifold pressure
and orifi ce size as specifi ed by the rating plate
values.
- Check that the door gasketing is not broken or
missing and that the seal is tight.
- Check that both vent liners are free of holes and
well sealed at all joints.
- Check that minimum rise per foot has been adhered
to for any horizontal venting.
- Verify all connections. Verify the connections
from the pilot assembly are tight; also verify these
connections are not grounding out to any metal.
- Verify the fl ame is engulfi ng the sensor rod. This
will increase the fl ame rectifi cation. Verify correct
pilot orifi ce is installed and inlet gas specifi cations
to manual. (Remember, the fl ame carries the
rectifi cation current, not the gas. If the fl ame lifts
from pilot hood, the circuit is broken. A wrong orifi ce
or too high of an inlet pressure can cause the pilot
fl ame to lift.) The sensor rod may need cleaning.
- Verify that the wire harness is fi rmly connected to
module Verify that the ceramic insulator around the
sensor rod is not cracked, damaged, or loose. Verify
the connection from the sensor rod to the sensor wire.
- Clean sensor rod with an emery cloth to remove
any contamination that may have accumulated on
the sensor rod. Verify continuity with multimeter with
ohms set at the lowest range.
- Inspect all wires, ensure good tight connections.
Verify that all wiring is installed exactly as specifi ed.
- Inspect the wiring harness, and verify the harness
is tightly connected to the module. Verify that all
wires are connected in the right order. See "WIRING
DIAGRAM" section.
- Check all seals.
- Check if exhaust is re-entering through an open
door or window.
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