COZY DVCF40 Installation And Operating Instructions Manual page 19

TROUBLESHOOTING CHART ( Specifically for Intermittent Ignition System ) - IID
GREEN LED FLASH
CODE (XxY)ª
OFF No Call for Heat
Flash Fast Startup - Flame
Sense Calibration
Normal Operation
Heartbeat
5 min. Retry Delay
2
Pilot flame not
detected during
trial for ignition
Recycle
3
Flame failed
during run
Flame sensed
4
out of sequence
7 Flame sense
leakage to ground
Low secondary
8
voltage supply -
(below 15.5 Vac)
6 + 2 5 minute Retry
Delay - On every
third retry on the
same "Call for Heat"
On every 6th
6 + 3
flame failure during
run on the same
"Call for Heat"
6 + 4
Flame sensed out
of sequence - longer
than 10 seconds
Soft lockout due
ON
to error detected
during self check
sequences
Please follow the following corrective actions in order.
INDICATES NEXT SYSTEM ACTION
Not Applicable
Not Applicable
Not Applicable
Initiate new trial for ignition after retry
delay completed.
Initiate new trial for ignition. Flash code
will remain through the ignition trial until
flame is proved.
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).
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.
Initiate new trial for ignition after retry
delay completed.
5 minute retry delay, then initiate new trial
for ignition.
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.
Control auto resets from soft lockout after
one hour.
RECOMMENDED SERVICE ACTION
None
None
None
If system fails to light on next trial for ignition check
gas supply, pilot burner, spark and flame sense wiring,
flame rod contaminated or out of position, burner ground
connection.
If system fails to light on next trial 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, replace control.
Check flame sense lead wire for damage or shorting.
Check that flame rod is in proper position. Check flame
rod ceramic for cracks, damage or tracking.
Check transformer and AC lines for proper 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 contaminated 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, replace control.
Reset by cycling "Call for Heat". If error repeats, replace
the control.
Page 19 1018028-B