Desa SB350D, SB600D owner manual Troubleshooting, Observed Problem, Possible Cause, Remedy

OWNER’S MANUAL

TROUBLESHOOTING

Note: For additional help, visit DESA International’s Technical Service web site at www.desatech.com.

WARNING: Never service heater while it is plugged in, operating, or hot. Severe burns and electrical shock can occur. Only a qualified service person should service and repair heater.

OBSERVED PROBLEM	POSSIBLE CAUSE		REMEDY
Motor does not start when heater is plugged	1.	No power or low voltage at heater due to:	1.	A) Check condition of power cord or
in and thermostat setting is higher than		A) Damaged power cord or extension		extension cord. Repair or replace if dam-
surrounding air temperature		cord		aged
		B) Wrong size extension cord		B) Use extension cord with proper wire
		C) Heater plugged into outlet with volt-		size (see To Start Heater, page 5)
		age lower than 120 volt		C) Make sure heater is plugged into 120
				volt/60 hertz outlet
	2.	Loose electrical connections	2.	Check connections. Tighten if loose
	3.	Motor overload protector tripped due to:	3.	A) See Fan Blades and Air Deflectors,
		A) Dirty fan		page 10
		B) Debris pulled into fan area by fan		B) Remove debris from fan and fan
		C) Binding pump		guard area
		D) Low voltage		C) Turn fan by hand. If fan is hard to
				turn, see Pump, page 11
				D) See steps B and C under item 1 above
				Note: Be sure to reset motor overload
				protector by pressing reset button on top
				of motor
	4.	Flame-out control not reset	4.	Press and release flame-out control re-
				set button. See Figure 4, page 5 for but-
				ton location
	5.	Damaged flame-out control	5.	Replace flame-out control
	6.	Damaged power relay	6.	Replace power relay
	7.	Damaged thermostat	7.	Replace thermostat
	8.	Binding pump	8.	Turn fan by hand. If fan is hard to turn,
				see Pump, page 11

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