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Green LED
Flash Code
(X + Y)
a
Indicates Next System Action Recommended Service Action
OFF No “Call for Heat” N/A None
Flash Fast
Startup - Flame sense
calibration
N/A None
Heartbeat Normal operation N/A None
2
5 minute Retry Delay-
Pilot ame not detected
during trial for ignition
Initiate new trial for ignition after retry
delay completed.
If system fails to light on next trial
for ignition check gas supply, pilot
burner, spark and ame sense wir-
ing, ame rod contamination or out
of position, burner ground connec-
tion.
3
Recycle- Flame failed
during run
Initiate new trial for ignition. Flash
code will remain through the ignition
trial until ame is proved.
If system fails to light on next trial
for ignition check gas supply, pilot
burner, ame sense wiring, ame
rod contamination, burner ground
connection.
4
Flame sensed out of
sequence
If situation self corrects within 10
seconds, control returns to normal
sequence. If ame out of sequence re-
mains longer than 10 seconds, control
goes to Flash code 6+4 (see below)
Check for pilot ame. Replace gas
valve if pilot ame present. If no
pilot ame, cycle “Call for Heat.” If
error repeats, replace control.
7
Flame sense leakage to
ground
Control remains in wait mode. When
the fault corrects, control resumes nor-
mal operation after a one minute delay.
Check ame sense lead wire for
damage or shorting. Check that
ame rod is in proper position.
Check ame rod ceramic for cracks,
damage or tracking.
8
Low secondary voltage
supply- (below 15.5 Vac)
Control remains in wait mode. When
the fault corrects, control resumes nor-
mal operation after one minute delay.
Check transformer and AC line for
proper input voltage to the control.
Check with full system load on the
transformer.
6 + 2
5 minute Retry Delay-
On every third retry on
same “Call for Heat”
Initiate new trial for ignition after retry
delay completed.
Check gas supply, pilot burner, spark
and ame sense wiring, ame rod
contamination or out of position,
burner ground connection.
6 + 3
On every 6th ame
failure during run on the
same “Call for Heat”
5 minute retry delay, then initiate new
trial for ignition.
Check gas supply, pilot burner, ame
sense wiring, contamination of ame
rod, burner ground connection.
6 + 4
Flame sensed out of
sequence- longer than
10 seconds
Control waits until ame is no longer
sensed and then goes to soft lockout.
Flash code continues. Control auto
resets from soft lockout after one hour.
Check for pilot ame. Replace gas
valve if pilot ame present. If no
pilot ame, cycle “Call for Heat.” If
error repeats, replace control.
ON
Soft lockout due to error
detected during self
check sequences
Control auto resets from soft lockout
after one hour.
Reset by cycling “Call for Heat.” If
error repeats, replace the control
a
Flash Code Descriptions:
- Flash Fast: rapid blinking
- Heartbeat: Constant ½ second bright, ½ second dim cycles.
- A single ash code number signies that the LED ashes X times at 2Hz, remains off for two seconds, and then
repeats the sequence.
- X + Y ash codes signify that the LED ashes X times at 2Hz, remains off for two seconds, ashes Y times at 2
Hz, remains off for three seconds, and then repeats the sequence.
Table 9: Green LED Status Codes