Hearth and Home Technologies II-B owner manual Troubleshooting, Intellifire Ignition System

11 Troubleshooting

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 qualified service person in the diagnosis of a problem and the corrective action to be taken. This troubleshooting guide can only be used by a qualified service technician.

A. Intellifire Ignition System

Sympton	Possible Cause	Corrective Action
1. The ignitor/module	a. Incorrect wiring.	Verify “S” wire (white) for sensor and “I” wire (orange) for ignitor are connected to
makes noise, but no		correct terminals on module and pilot assembly. Reversed wires at the module may
spark.		cause system to make sparking noise, but spark may not be present at pilot hood.
	b. Loose connections	Verify no loose connections or electrical shorts in wiring from module to pilot assem-
	or electrical shorts in	bly. Rod closest to pilot hood should be ignitor. Verify connections underneath pilot
	the wiring.	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	Verify gap of igniter to pilot hood. The gap should be approximately .17 inch or 1/8
	large.	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 fine. Inspect pilot assembly for shorted sparker wire or cracked insulator around
		electrode.
2. Pilot won’t light,	a. Transformer	Verify that transformer is installed and plugged into module. Check voltage of trans-
there is no noise or	installed correctly.	former under load at spade connection on module with ON/OFF switch in ON posi-
spark.		tion. Acceptable readings of a good transformer are between 3.2 and 2.8 volts AC.
	b. A shorted or loose	Remove and reinstall the wiring harness that plugs into module. Verify there is a
	connection in wiring	tight fit. Verify pilot assembly wiring to module. Remove and verify continuity of each
	configuration or wiring	wire in wiring harness.
	harness.
	c. Improper wall switch	Verify that 110/VAC power is “ON” to junction box.
	wiring.
	d. Module not	Verify black ground wire from module wire harness is grounded to metal chassis of
	grounded.	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 fine. Inspect pilot assembly for shorted sparker wire or cracked insulator around
		electrode.
3. Pilot lights but	a. A shorted or loose	Verify all connections to wiring diagram in manual. Verify connections underneath
continues to spark,	connection in sensor	pilot assembly are tight. Verify connections are not grounding out to metal chassis,
and main burner will	rod.	pilot burner, pilot enclosure or screen if present, or any other metal object.
not ignite. (If the pilot	b. Poor flame rectifi-	Verify that flame is engulfing sensor rod. If the pilot assembly does not have a
continues to spark
	cation or contaminated	ground strap, consider installing one to increase flame rectification. Verify correct pi-
after the pilot flame
	sensor rod.	lot orifice is installed and inlet gas specifications. Flame carries rectification current,
has been lit, flame
		not the gas. If flame lifts from pilot hood, the circuit is broken. A wrong orifice or too
rectification has not
		high an inlet pressure can cause pilot flame to lift. The sensor rod may be contami-
occurred.)
		nated. Clean sensor rod with emery cloth.
	c. Module is not	Verify that module is securely grounded to metal chassis of appliance. Verify that
	grounded.	wire harness is firmly connected to module.

Heat & Glo LifeStyle Collection • Twilight-II-B • 2108-900 Rev. G • 8/07 31