Napoleon BGD36CFNTR Installation And Operating Instructions Manual page 60

60
SYMPTOM
Continues to sparks
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.
Flames are very
aggressive.
Main burner fl ame is a
blue, lazy, transparent
fl ame.
White / grey fi lm forms.
W415-0785 / A / 07.23.09
PROBLEM
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.
Module or Valve.
Fireplace is spilling.
Door is ajar.
Venting action is too great.
Blockage in vent.
Compromised venting.
Sulphur from fuel is being
deposited on glass, logs or
combustion chamber
surfaces.
TEST SOLUTION
- 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 you have
7 wires and they are connected in the right order.
- Conduct the following test to verify if the problem
is the module or valve. To measure voltages, turn
multimeter to "DC" place the red lead from multimeter
on the screw on the terminal block for the wire you
are checking, touch black lead to ground (valve
body). Importantly, a "Zero" volts reading does not
automatically indicate a bad module, there may be
too high resistance in the valve solenoid. Check the
Green wire disconnected from valve that the voltage
output from the module should be between 2 and 3
volts.
- Check all seals.
- Tighten door clamps
- Restrict vent exit with restrictor plate. See Restricting
Vents.
- Remove blockage. In really cold conditions, ice
buildup may occur on the terminal and should be
removed as required.
- Check venting system parameters (seal, length, rise,
etc.)..
- Clean the glass with a recommended gas fi replace
glass cleaner. DO NOT CLEAN GLASS WHEN HOT.
- If deposits are not cleaned off regularly, the glass
may become permanently marked.
42.7_2