Desa VP5B, VP11A Trouble- Shooting, Continued, see Cleaning and, Maintenance, page

22

TROUBLE- SHOOTING

Continued

OBSERVED	POSSIBLE
PROBLEM	CAUSE		REMEDY
ODS/pilot lights but	1.	Control knob not fully	1.	Press in control knob
flame goes out when		pressed in		fully
control knob is	2.	Control knob not	2.	After ODS/pilot lights,
released		pressed in long enough		keep control knob
				pressed in 10 seconds
	3. Manual shutoff valve		3.	Fully open manual
		not fully open		shut-off valve
	4. Thermocouple connec-		4.	Hand tighten until
		tion loose at control		snug, then tighten 1/4
		valve		turn more
	5.	Pilot flame not touch-	5.	A) Contact local
		ing thermocouple,		propane gas company
		which allows thermo-
		couple to cool, causing		B) Clean ODS/pilot
		pilot flame to go out.		(see Cleaning and
		This problem could be		Maintenance, page 20)
		caused by one or both		or replace ODS/pilot
		of the following:		assembly
		A) Low gas pressure
		B) Dirty or partially
		clogged ODS/pilot
	6. Thermocouple dam-		6.	Replace thermocouple
		aged
	7. Control valve damaged		7.	Replace control valve
Burner(s) does not	1.	Burner orifice(s) is	1.	Clean burner orifice(s)
light after ODS/pilot		clogged		(see Cleaning and
is lit				Maintenance, page 20)
				or replace burner
				orifice(s)
	2.	Burner orifice(s)	2.	Replace burner orifice(s)
		diameter is too small
	3.	Inlet gas pressure is	3.	Contact local propane
		too low		gas company
Delayed ignition of	1.	Manifold pressure is	1.	Contact local propane
burner(s)		too low		gas company
	2.	Burner orifice(s) is	2.	Clean burner orifice(s)
		clogged		(see Cleaning and
				Maintenance, page 20)
				or replace burner
				orifice(s)
Burner backfiring	1.	Burner orifice(s) is	1.	Clean burner orifice(s)
during combustion		clogged or damaged		(see Cleaning and
				Maintenance, page 20)
				or replace burner
				orifice(s)
	2. Burner damaged		2.	Replace burner
	3.	Gas regulator defective	3.	Replace gas regulator

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