25613-0-0309 Page 55
INTERMITTENT PILOT TROUBLESHOOTING (continued)
Green LED Status Codes
Green LED
Flash Code
(X + Y)aIndicates Next System Action Recommended Service Action
OFF No “Call for Heat” Not applicable None
Flash Fast Startup-Flame sense calibration Not applicable None
Heart Beat Normal operation Not applicable None
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, contamination of
ame rod, burner ground connection.
4 Flame sensed out of sequence If situation self corrects within 10 sec-
onds, control returns to normal sequence.
If ame out of sequence remains 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 a 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 Failed trial for ignition resulting
in lockout
Remain in lockout until “Call for Heat”
is cycled.
Check gas supply, pilot burner, spark
and ame sense wiring, ame rod con-
taminated or out of position, burner
ground connection.
6 + 3 More than 5 ame failures during
run on the same “Call for Heat”
resulting in lockout
Remain in lockout until “Call for Heat”
is cycled.
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 re-
sets 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 af-
ter one hour.
Reset by cycling “Call for Heat.” If er-
ror repeats, replace the control.
aFlash Code Descriptions:
- Flash Fast: Rapid blinking - Heartbeat: Constant 1/2 second bright 1/2 second dim cycles - A single ash code number signies 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 2Hz, remains off for three seconds, and then repeats the sequence.