State Industries STC-074 specifications Eco

SBN TANK TYPE COMMERCIAL GAS WATER HEATER

SERVICE HANDBOOK

LED INDICATORS ON HOT SURFACE IGNITION (HSI)

USING FLASHING RED LED ON HSI (HOT SURFACE IGNITION)

	LED STATUS	INDICATION	ACTION TO BE TAKEN
	1 Flash	System is in lockout.	Interrupt power to
			reset. Heater had not
			sensed the flame –
			check gas supply and
			igniter condition.
	2 Flashes	Draft proving	Test for defective
		(pressure) switch	switch or a
		(closes at -2.10 +0.01	pressurized room
		inches W.C. negative	condition that may be
		pressure) failed to	forcing air through the
		open within 5 seconds	inducer.
		at the end of the last
		cycle.
	3 Flashes	Draft proving	Check the draft.
		(pressure) switch	The low gas pressure
		failed to close	switch closes at 5.2 inches W.C.
		within 5 seconds after	may have remained open.
		the inducer was	Verify the supply gas pressure
		started.	while the gas is flowing.
	4 Flashes	Open on high	Check temperature
			control operation.
		temperature
		limit switch
		(ECO)
	6 Flashes	115-volt supply power	Verify that a neutral-to-ground
			check results
		connection is	in “0” volts and a hot-to-
		indicating reversed	ground check
		polarity.	results in 115-125 VAC.
©2003		38	Technical Training Department

Ashland City, Tennessee