Burnham Series 2B manual Green LED Status Codes

Table 7: Green LED Status Codes

Green LED
Flash Code	Indicates	Next System Action	Recommended Service Action
(X + Y)a
OFF	No “Call for Heat”	N/A	None
Flash Fast	Startup - Flame sense	N/A	None
	calibration
Heartbeat	Normal operation	N/A	None
			If system fails to light on next trial
	5 minute Retry Delay-		for ignition check gas supply, pilot
		Initiate new trial for ignition after retry	burner, spark and flame sense wir-
2	Pilot flame not detected
		delay completed.	ing, flame rod contamination or out
	during trial for ignition
			of position, burner ground connec-
			tion.
			If system fails to light on next trial
	Recycle- Flame failed	Initiate new trial for ignition. Flash	for ignition check gas supply, pilot
3		code will remain through the ignition	burner, flame sense wiring, flame
	during run
		trial until flame is proved.	rod contamination, burner ground
			connection.
		If situation self corrects within 10	Check for pilot flame. Replace gas
		seconds, control returns to normal
	Flame sensed out of		valve if pilot flame present. If no
4		sequence. If flame out of sequence re-
	sequence		pilot flame, cycle “Call for Heat.”	If
		mains longer than 10 seconds, control	error repeats, replace control.
		goes to Flash code 6+4 (see below)
			Check flame sense lead wire for
	Flame sense leakage to	Control remains in wait mode. When	damage or shorting. Check that
7		the fault corrects, control resumes nor-	flame rod is in proper position.
	ground
		mal operation after a one minute delay.	Check flame rod ceramic for cracks,
			damage or tracking.
		Control remains in wait mode. When	Check transformer and AC line for
	Low secondary voltage		proper input voltage to the control.
8		the fault corrects, control resumes nor-
	supply- (below 15.5 Vac)		Check with full system load on the
		mal operation after one minute delay.	transformer.
	5 minute Retry Delay-		Check gas supply, pilot burner, spark
		Initiate new trial for ignition after retry	and flame sense wiring, flame rod
6 + 2	On every third retry on
		delay completed.	contamination or out of position,
	same “Call for Heat”
			burner ground connection.
	On every 6th flame	5 minute retry delay, then initiate new	Check gas supply, pilot burner, flame
6 + 3	failure during run on the		sense wiring, contamination of flame
		trial for ignition.
	same “Call for Heat”		rod, burner ground connection.
	Flame sensed out of	Control waits until flame is no longer	Check for pilot flame. Replace gas
		sensed and then goes to soft lockout.	valve if pilot flame present. If no
6 + 4	sequence- longer than
		Flash code continues. Control auto	pilot flame, cycle “Call for Heat.”	If
	10 seconds
		resets from soft lockout after one hour.	error repeats, replace control.
	Soft lockout due to error	Control auto resets from soft lockout	Reset by cycling “Call for Heat.”	If
ON	detected during self
		after one hour.	error repeats, replace the control
	check sequences
aFlash Code Descriptions:

-Flash Fast: rapid blinking

-Heartbeat: Constant ½ second bright, ½ second dim cycles.

-A single flash code number signifies that the LED flashes X times at 2Hz, remains off for two seconds, and then repeats the sequence.

-X + Y flash codes signify that the LED flashes X times at 2Hz, remains off for two seconds, flashes Y times at 2

Hz, remains off for three seconds, and then repeats the sequence.

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