Heat & Glo LifeStyle SL-950TV-D B. Intellifire Ignition System, Symptom, Possible Causes

B. Intellifire Ignition System

Symptom	Possible Causes	Corrective Actions
1. The ignitor/	a. Incorrect wir-	Verify “S” wire (white) for sensor and “I” wire (orange) for ignitor are con-
module makes	ing.	nected to correct terminals on module and pilot assembly. Reversed wires
noise, but no		at the module may cause system to make sparking noise, but spark may
spark.		not be present at pilot hood.
	b. Loose connec-	Verify no loose connections or electrical shorts in wiring from module to pi-
	tions or electri-	lot assembly. Rod closest to pilot hood is ignitor. Verify connections under-
	cal shorts in the	neath pilot assembly are tight; also verify connections are not grounding
	wiring.	out to metal chassis, pilot burner, pilot enclosure, mesh screen if present,
		or any other metal object.
	c. Ignitor gap is	Verify gap of igniter to pilot hood. The gap should be approximately .17
	too large.	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 mod-
		ule. If there is no spark at “I” terminal module must be replaced. If there is
		a spark at “I” terminal, module is fine. Inspect pilot assembly for shorted
		sparker wire or cracked insulator around electrode.
2. Pilot won’t	a. Transformer	Verify that transformer is installed and plugged into module. Check volt-
light, there is no	installed correctly.	age of transformer under load at spade connection on module with ON/
noise or spark.		OFF switch in ON position. Acceptable readings of a good transformer are
		between 3.2 and 2.8 volts AC.
	b. A shorted or	Remove and reinstall the wiring harness that plugs into module. Verify
	loose connection	there is a tight fit. Verify pilot assembly wiring to module. Remove and
	in wiring configu-	verify continuity of each wire in wiring harness.
	ration or wiring
	harness.
	c. Improper wall	Verify that 110 VAC power is “ON” to junction box.
	switch wiring.
	d. Module not	Verify black ground wire from module wire harness is grounded firmly to
	grounded.	metal chassis of appliance.
	e. Faulty mod-	Turn ON/OFF rocker switch or wall switch to OFF position. Remove ignitor
	ule.	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 mod-
		ule. If there is no spark at “I” terminal module must be replaced. If there is
		a spark at “I” terminal, module is fine. Inspect pilot assembly for shorted
		sparker wire or cracked insulator around electrode.
3. Pilot lights	a. A shorted or	Verify all connections to wiring diagram in manual. Verify connections
but continues	loose connection	underneath pilot assembly are tight. Verify connections are not grounding
to spark, and	in sensor rod.	out to metal chassis, pilot burner, pilot enclosure or screen if present, or
main burner will		any other metal object.
not ignite. (If the
	b. Poor flame	Verify that flame is engulfing sensor rod. If the pilot assembly does not have
pilot continues
to spark after the	rectification or	a ground strap, consider installing one to increase flame rectification. Verify
pilot flame has	contaminated	correct pilot orifice is installed and inlet gas specifications. Flame carries rec-
been lit, flame	sensor rod.	tification current, not the gas. If flame lifts from pilot hood, the circuit is bro-
rectification has		ken. A wrong orifice or too high an inlet pressure can cause pilot flame to lift.
not occurred.)		The sensor rod may be contaminated. Clean sensor rod with emery cloth.
	c. Module is not	Verify that module is securely grounded to metal chassis of appliance.
	grounded.	Verify that wire harness is firmly connected to module.

Heat & Glo • SL-550 / 750 / 950TV-D • 2053-985 Rev. J • 4/07 37