Heatiator GDST3831I owner manual Troubleshooting, Intellifire Ignition System

15 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 technician in the diagnosis of a problem and the corrective action to be taken. This troubleshooting guide can only be used by a qualified technician. Contact your dealer to arrange a service call by a qualified technician.

A. Intellifire Ignition System

Symptom	Possible Cause	Corrective Action
1. Pilot won’t light.	a. Incorrect wiring.	Verify “S” wire (white) for sensor and “I” wire (orange) for ignitor
The ignitor/module		are connected to correct terminals on module and pilot assembly.
makes noise, but no
	b. Loose connections or electrical	Verify no loose connections or electrical shorts in wiring from
spark.
	shorts in the wiring.	module to pilot assembly. Verify connections underneath pilot as-
		sembly 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 right side of pilot hood. The gap should be
		approximately .17 in. or 1/8 in. (3 mm).
	d. Module.	Turn ON/OFF rocker switch or wall switch to OFF position. Remove
		ignitor wire “I” from module. Place a grounded wire about 3/16 in. (5
		mm) away from “I” terminal on module. Place ON/OFF rocker switch
		or wall switch in ON position. 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. Replace pilot if necessary.
2. Pilot won’t light,	a. No power or transformer installed	Verify that transformer is installed and plugged into module. Check
there is no noise or	incorrectly.	voltage of transformer under load at spade connection on module
spark.		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 connection in wir-	Remove and reinstall the wiring harness that plugs into module.
	ing configuration or wiring harness.	Verify there is a tight fit. Verify pilot assembly wiring to module. Re-
		move and verify continuity of each wire in wiring harness. Replace
		any damaged components.
	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. Module.	Turn ON/OFF rocker switch or wall switch to OFF position. Re-
		move ignitor wire “I” from module. Place ON/OFF rocker switch
		or wall switch in ON position. 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 sparks, but	a. Gas supply.	Verify that incoming gas line ball valve is “open”. Verify that inlet
Pilot will not light.		pressure reading is within acceptable limits, inlet pressure must
		not exceed 14 in. W.C.
	b. Ignitor gap is incorrect.	Verify that spark gap from ignitor to pilot hood is .17 in. or 1/8 in (3 mm).
	c. Module is not grounded.	Verify module is securely grounded to metal chassis of appliance.
	d. Module voltage output / Valve/Pilot	Verify battery voltage is at least 2.7 volts. Replace batteries if volt-
	solenoid ohms readings.	age is below 2.7.

52 Heatilator • GDST3831I • 2127-900 Rev. K • 7/12