Heat & Glo Fireplace BRAVO 704-902 - Manual (Page 44)

Heat & Glo • Bravo • 704-902 Rev. F • 10/08 44
A. Intellifi re Ignition System
Sympton Possible Cause Corrective Action
1. The ignitor/module makes
noise, but no spark. a. Incorrect wiring. Verify “S” wire (white) for sensor and “I” wire (orange) for ignitor
are connected to correct terminals on module and pilot assembly.
Reversed wires at the module may cause system to make sparking
noise, but spark may not be present at pilot hood.
b. Loose connections or elec-
trical shorts in the wiring. Verify no loose connections or electrical shorts in wiring from mod-
ule to pilot assembly. Rod closest to pilot hood should be ignitor.
Verify connections underneath pilot assembly are tight; also verify
connections are not grounding out to metal chassis, pilot burner,
pilot enclosure, mesh screen if present, or any other metal object.
c. Ignitor gap is too large. Verify gap of igniter to pilot hood. The gap should be approximately
.17 inch or 1/8 inch.
d. Faulty module. Turn ON/OFF rocker switch or wall switch to OFF position. Remove
ignitor wire “I” from module. Place ON/OFF Rocker switch or wall
switch in ON position. Hold ground wire about 3/16 inch away from
“I” terminal on module. If there is no spark at “I” terminal module
must be replaced. If there is a spark at “I” terminal, module is fi ne.
Inspect pilot assembly for shorted sparker wire or cracked insulator
around electrode.
2. Pilot won’t light, there is no
noise or spark. a. Transformer installed cor-
rectly. Verify that transformer is installed and plugged into module. Check
voltage of transformer under load at spade connection on module
with ON/OFF switch in ON position. Acceptable readings of a good
transformer are between 3.2 and 2.8 volts AC.
b. A shorted or loose connec-
tion in wiring confi guration or
wiring harness. Remove and reinstall the wiring harness that plugs into module.
Verify there is a tight fi t. Verify pilot assembly wiring to module.
Remove and verify continuity of each wire in wiring harness.
c. Improper wall switch wiring. Verify that 110/VAC power is “ON” to junction box.
d. Module not grounded. Verify black ground wire from module wire harness is grounded to
metal chassis of appliance.
e. Faulty module. Turn ON/OFF rocker switch or wall switch to OFF position. Remove
ignitor wire “I” from module. Place ON/OFF Rocker switch or wall
switch in ON position. Hold ground wire about 3/16 inch away from
“I” terminal on module. If there is no spark at “I” terminal module
must be replaced. If there is a spark at “I” terminal, module is fi ne.
Inspect pilot assembly for shorted sparker wire or cracked insulator
around electrode.
3. Pilot lights but continues to
spark, and main burner will not
ignite. (If the pilot continues to
spark after the pilot fl ame has
been lit, fl ame rectifi cation has
not occurred.) a. A shorted or loose connec-
tion in sensor rod. Verify all connections to wiring diagram in manual. Verify connec-
tions underneath pilot assembly are tight. Verify connections are
not grounding out to metal chassis, pilot burner, pilot enclosure or
screen if present, or any other metal object.
With proper installation, operation, and maintenance your gas appliance will provide years of trouble-free service. If you do
experience a problem, this troubleshooting guide will assist a qualifi ed service person in the diagnosis of a problem and the
corrective action to be taken. This troubleshooting guide can only be used by a qualifi ed service technician.
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Troubleshooting