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Green LED
Flash Code
(X + Y)
a
OFF
No "Call for Heat"
Flash Fast
Startup-Flame sense calibration
Heart Beat
Normal operation
Recycle
- Flame failed during run
3
Flame sensed out of sequence
4
Flame sense leakage to ground
7
Low secondary voltage supply -
8
below 15.5 Vac)
Failed trial for ignition resulting in
lockout
6 + 2
More than 5 flame failures during
6 + 3
run on the same "Call for Heat" re-
sulting in lockout
Flame sensed out of sequence -
longer than 10 seconds
6 + 4
Soft lockout due to error detected
ON
during self check sequences
Flash Code Descriptions:
a
-
Flash Fast: Rapid blinking
-
Heartbeat: Constant 1/2 second bright 1/2 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 2Hz, remains off
for three seconds, and then repeats the sequence.
Page 20
TROUBLESHOOTING (CONT'D)
Green LED Status Codes
Indicates
Initiate new trial for ignition. Flash code
will remain through the ignition trial until
flame is proved.
If situation self corrects within 10 sec-
onds, control returns to normal se-
quence. If flame out of sequence re-
mains longer than 10 seconds, control
goes to Flash code 6 + 4 (see below).
Control remains in wait mode. When the
fault corrects, control resumes normal
operation after a one minute delay.
Control remains in wait mode. When the
fault corrects, control resumes normal
operation after a one minute delay.
Remain in lockout until "Call for Heat" is
cycled.
Remain in lockout until "Call for Heat" is
cycled.
Control waits until flame is no longer
sensed and then goes to soft lockout.
Flash code continues. Control auto re-
sets from soft lockout after one hour.
Control auto resets from soft lockout af-
ter one hour.
Next System Action
Not applicable
Not applicable
Not applicable
Recommended Service Action
None
None
None
If system fails to light on next trial for
ignition, check gas supply, pilot burner,
flame sense wiring, contamination of
flame rod, burner ground connection.
Check for pilot flame. Replace gas valve
if pilot flame present. If no pilot flame,
cycle "Call for Heat." If error repeats, re-
place control.
Check flame sense lead wire for dam-
age or shorting. Check that flame rod is
in proper position.
Check flame rod ceramic for cracks,
damage or tracking.
Check transformer and AC line for prop-
er input voltage to the control. Check
with full system load on the transformer.
Check gas supply, pilot burner, spark
and flame sense wiring, flame rod con-
taminated or out of position, burner
ground connection.
Check gas supply, pilot burner, flame
sense wiring, contamination of flame
rod, burner ground connection.
Check for pilot flame. Replace gas valve
if pilot flame present. If no pilot flame,
cycle "Call for Heat." If error repeats, re-
place control.
Reset by cycling "Call for Heat." If error
repeats, replace the control.
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