Napoleon GDS25N GDS25P Installation And Operation Instructions Manual page 26

26
TROUBLE SHOOTING GUIDE
B
EFORE ATTEMPTING TO TROUBLESHOOT
SYMPTOM
Pilot will not light.
Makes noise with no
spark at pilot burner
Pilot will not light.
Makes no noise with no
spark at pilot burner
Pilot sparks but will not light
Continues to sparks
and pilot lights, but
main burner will not
light
W415-0547 / B / 05.08.06
,
PURGE YOUR UNIT AND INITIALLY LIGHT THE PILOT AND THE MAIN BURNER WITH THE GLASS DOOR REMOVED
PROBLEM
- Wiring
- Loose connection
- Module
- Igniter Spark gap is
incorrect
- Out of propane gas.
- Transformer
- A shorted or loose
Connection
- Improper switch wiring
- Module is not grounded
- Faulty module
- Gas supply
- Module is not grounded
- 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
TEST SOLUTION
Verify the "S" wire for the sensor and the "I" wire for the ignitor are
connected to the correct terminals (not reverse) on the module and
pilot assembly.
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" posi-
tion. 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 fi ne. Inspect pilot assembly for a
shorted wire or cracked insulator around the electrode.
- spark gap of the ignitor to the pilot should be .17" tor 1/8"
- fi ll the tank.
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.
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 the simplest ON/OFF switch
Verify the value and pilot assemblies are properly grounded to the
metal chassis of the fi replace 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" posi-
tion. 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 fi ne. 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 14" W.C.
Verify the value and pilot assemblies are properly grounded to the
metal chassis of the fi replace or log set.
Verify all conncetions. 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 orfi ce is installed and inlet gas
specifi cations to manual. (Remember, the fl ame carries the rectifi ca-
tion current, not the gas. If the fl ame lifts from pilot hood, the curcuit
is broken. A wrong orfi 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 wih an enery cloth to remove any
contamination that may have accumulated on the sensor rod. Verify
continuity with multimeter with olms set at the lowest range.
.