Heatiator GB4336 B. Intellifire Ignition System, Symptom, Possible Causes, Corrective Actions

B. Intellifire Ignition System

	Symptom		Possible Causes	Corrective Actions
1.	The ignitor/module makes	A.	Incorrect wiring.	Verify “S” wire (white) for sensor and “I” wire (orange) for ignitor are
	noise, but no spark.			connected to the correct terminals on the module and the pilot assembly.
				Reversed wires at the module may cause the system to make a sparking
				noise, but the spark may not be present at pilot hood.
		B.	Loose connections or	Verify there are no loose connections or electrical shorts in wiring from
			electrical shorts in the	module to pilot assembly. The rod closest to the pilot hood should be ignitor.
			wiring.	Verify connections underneath pilot assembly are tight; also verify the
				connections are not grounding out to the metal chassis, pilot burner, pilot
				enclosure, mesh screen if present, or any other metal object.
		C.	Ignitor gap is too large.	Verify gap of ignitor to pilot hood. The gap should be approximately .17 in. or
				1/8 in.
		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 in. 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.	Pilots won’t light, there is	A.	Transformer installed	Verify that transformer is installed and plugged into module. Check voltage of
	no noise or spark.		incorrectly.	transformer under load at space 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	Remove and reinstall the wiring harness that plugs into module. Verify there is
			connection in wiring	a tight fi t. Verify pilot assembly wiring to module. Remove and verify continuity
			confi guration or wiring	of each wire in wiring harness.
			harness.
		C.	Improper wall switch	Verify wall switch is wired correctly.
			wiring.
		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 in. 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	A.	A shorted or loose	Verify all connections to wiring diagram in manual. Verify connections
	to spark, and main burner		connection in sensor rod.	underneath pilot assembly are tight. Verify connections are not grounding out
	will not ignite. (If the pilot			to metal chassis, pilot burner, pilot enclosure or screen if present, or any other
	continues to spark after			metal object.
	the pilot fl ame has been
		B.	Poor fl ame rectifi cation or	Verify fl ame is engulfi ng sensor rod. If the pilot assembly does not have a
	lit, fl ame rectifi cation has
			contaminated sensor rod.	ground strap, consider installing one to increase fl ame rectifi cation. Verify
	not occurred.)
				correct pilot orifi ce is installed and inlet gas specifi cations are met. Flame
				carries rectifi cation current, not the gas. If fl ame lifts from pilot hood, the
				circuit is broken. A wrong orifi ce or too high an inlet pressure can cause pilot
				fl ame to lift. The sensor rod may be contaminated. Clean sensor rod with
				emery cloth.
		C.	Module is not grounded.	Verify that module is securely grounded to metal chassis of appliance. Verify
				that the wire harness is fi rmly connected to module.
		D.	Damaged pilot assembly	Verify that ceramic insulator around the sensor rod is not cracked, damaged,
			or dirty sensor rod.	or loose. Verify connection from sensor rod to white sensor wire. Clean
				sensor rod with emery cloth to remove any contaminants that may have
				accumulated on sensor rod. Verify continuity with a multimeter with ohms set
				at lowest range.
		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 in. 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.

Heatilator • GB4336/GB4992 • 4003-085 Rev H • 04/06 35