38
GREEN LED
FLASH CODE
(x+Y)
A
INDICATES
NExT SYSTEM ACTION
RECOMMENDED SERVICE
ACTION
OFF
No "Call for Heat"
not applicable
none
Flash Fast
Startup - Flame sense calibration
not applicable
none
Heartbeat
Normal operation
not applicable
none
2
5 minute Retry Delay
• Pilot flame 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 flame
sense wiring, flame sensor
contaminated or out of position,
burner ground connection.
3
Recycle
• Flame failed during run
Initiate new trial for ignition. Flash
code will remain through the ignition
trial until flame is proved.
If system fails to light on next trial
for ignition, check gas supply,
pilot burner, flame sense wiring,
contamination of flame sensor,
burner ground connection.
4
Flame sensed out of sequence
If situation self corrects within 10
seconds, control returns to normal
sequence. If flame out of sequence
remains longer than 10 seconds,
control goes to Flash code 6+4 (see
below).
Check for pilot flame. Replace
gas control valve if pilot flame is
present. If no pilot flame, 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
normal operation after a one minute
delay.
Check flame sense lead wire for
damage or shorting. Check that
flame sensor is in proper position.
Check flame sensor 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
normal 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
5 minute Retry Delay
• On every third retry on the same
"Call for Heat"
Initiate new trial for ignition after
retry delay completed.
Check gas supply line, pilot
burner, spark and flame
sense wiring, flame sensor
contaminated or out of position,
burner ground connection.
6+3
On every 6th flame failure during run
on the same "Call for Heat"
5 minute retry delay, then initiate
new trial for ignition.
Check gas supply, pilot burner,
flame sense wiring, contamination
of flame sensor, burner ground
connection.
6+4
Flame sensed out of sequence-
longer than 10 seconds
Control waits until flame 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 flame. Replace
gas control valve if pilot flame
present. If no pilot flame, 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 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.
TABLE 19. CONTINUOUS RETRY MODELS C, M, E AND K ONLY - GREEN LED STATUS CODES
