Desa TPNEA-A, (V)DVF36, TSTPA-A, TSTEA-A, TSTPEA-A Troubleshooting, Electronic ignition system

TROUBLESHOOTING

Continued

PROBLEM POSSIBLE CAUSE REMEDY

When ignitor button is pressed, 1. Defective ignitor there is no spark at pilot

2. Defective pilot or misaligned electrode at pilot

3. No or low gas pressure

1.Replace ignitor if wire is prop- erly connected and you have no spark

2.Using a match, light pilot. If pi- lot lights turn off pilot and push piezo again. If pilot lights, an improper gas/air mixture cause improper lighting and a longer purge period is recommended. If pilot will not light, check gap at electrode and pilot. Gap should be 1/8" for strong spark. If elec- trode is okay, replace pilot

3.LP only: Check fuel supply and contact local propane/LP supplier if low.

LP and Natural: Check for kinked or bent hoses. Consult pipe fitter or plumber.

Electronic ignition system
PROBLEM	POSSIBLE CAUSE		REMEDY
Ignitor will not spark or burner	1. No or low gas pressure		1.	LP only: Check fuel supply
will not light				and contact local propane/LP
				supplier if low.
				LP and Natural: Check for
				kinked or bent hoses. Consult
	2.	Air in gas line	2.	pipe fitter or plumber.
				Repeat lighting procedure
				several times to purge air from
				lines. If unit will still not light,
				contact a qualified service and
	3.	Construction debris clogging	3.	repair technician
				Remove debris and dirt, in-
		main orifice		spect and clean other possible
	4.	Control valve knob not	4.	obstructions
				Replace control valve
	5.	opening	5.	Contact a qualified technician
		Kinked pilot line
	6.	No power to unit or ignition	6.	to replace pilot line
				Check that main power is on
		module/power transformer is		and all wire connections are
		bad		made correctly to ignition
				module
Burner will not stay lit	1. Loose wiring on ignition		1.	Check ignition wire connec-
		module		tion - see Wiring Diagrams,
	2. Poor ground to ignition		2.	page 33
				Check ground wire connection
		module	3.	- see Wiring Diagrams, page 33
	3. Main burner flame too low			Clean and adjust main burner;
		to sense		check gas supply and inlet
				pressure; replace ignition as-
				sembly if necessary

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