39
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
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
Failed trial for ignition resulting in
lockout
Remain in lockout until "Call for
Heat" is cycled.
Check gas supply line, pilot
burner, spark and flame
sense wiring, flame sensor
contaminated or out of position,
burner ground connection.
6+3
More than 5 flame 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, 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 20. LOCKOUT MODELS B, H, D AND J ONLY - GREEN LED STATUS CODES
