Troubleshooting - Napoleon HD35NT Installation And Operating Instructions Manual

11.0

TrOuBLEShOOTINg

Always light the pilot whether for the first time or if the gas supply has ran out, with the glass door
SYMPTOM
Pilot will not light.
Makes no noise with
no spark at pilot
burner.
Pilot sparks but will
not light.
Continues to spark
and pilot lights, but
main burner will not
light.
PROBLEM
Wiring.
Transformer.
Switch
Loose connection.
Module.
Igniter spark gap is incorrect.
A shorted or loose connection.
Improper switch wiring.
Module is not grounded.
Faulty module.
Gas supply.
Module is not grounded.
Out of propane gas.
Short or loose connection in sensor
rod.
Poor flame rectification or
contaminated sensor rod.
WARNING
!
open or removed.
TEST SOLUTION
- Verify the "S" wire for the sensor and the "I" wire for the igniter are
connected to the correct terminals (not reverse) on the module and pilot
assembly.
- Verify the transformer is installed and plugged into the module. Check
voltage of the transformer under load at the spade connections on the
module with the ON/OFF switch in the "ON" position. Acceptable readings
of a good transformer are between 3.2 and 2.8 volts A.C.
- Check continuity.
- Verify no loose connections, electrical shorts in the wiring or ground out
to any metal object.
- Turn the ON/OFF switch to the "OFF" position. Remove the igniter wire
"I" from the module. Place the ON/OFF switch to the "ON" position. Hold
a grounded wire about 3/16" away from the "I" terminal on the module. If
no spark the "I" terminal module must be replaced. If there is a spark the
"I" terminal is fine. Inspect pilot assembly for a shorted wire or cracked
insulator around the electrode.
- Spark gap of the igniter to the pilot should be .12" or 1/8".
- Remove and reinstall the wiring harness that plugs into the module.
Remove and verify continuity of each wire in wiring harness.
- Troubleshoot the system with a simple ON/OFF switch
- Verify the valve and pilot assemblies are properly grounded to the metal
chassis of the fireplace or log set.
- Turn the ON/OFF switch to the "OFF" position. Remove the igniter wire
"I" from the module. Place the ON/OFF switch to the "ON" position. Hold
a grounded wire about 3/16" away from the "I" terminal on the module. If
no spark the "I" terminal module must be replaced. If there is a spark
the "I" terminal is fine. Inspect pilot assembly for a shorted wire or cracked
insulator around the electrode.
- Verify that the incoming gas line ball valve is "Open". Verify that the inlet
pressure reading is within acceptable limits, inlet pressures must not
exceed 13" W.C. (7" W.C. for Natural Gas and 13" W.C. for propane).
- Verify the value and pilot assemblies are properly grounded to the metal
chassis of the fireplace or log set.
- Fill the tank.
- 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 flame is engulfing the sensor rod. This will increase the flame
rectification. Verify correct pilot orifice is installed and inlet gas
specifications to manual. (Remember, the flame carries the rectification
current, not the gas. If the flame lifts from pilot hood, the curcuit is broken.
A wrong orifice or too high of an inlet pressure can cause the pilot flame to
lift.) The sensor rod may need cleaning.
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W415-0750 / 12.17.08