Vulcan-Hart 1GR45A Service Manual page 33

IGNITION SYSTEM STATUS LED CODES (GREEN) - PART NO. 857207-1
LED Flash
Indicates
Code
OFF No Call for Heat
Fast Flash Startup
- Pilot flame sense
calibration
Heartbeat Normal operation
3 Restart ignition trial
- Pilot flame failed
while main burner
on
4 Pilot flame sensed out
of sequence
7 Pilot flame sense
leakage to ground
GRA SERIES GAS FRYERS - TROUBLESHOOTING
SINGLE TRY LOCKOUT IGNITION MODULE
System Action
None
Flame sense calibration
automatically occurs immediately
after pilot lights.
None
Trial for ignition auto re-starts. Flash
code will remain through the ignition
trial until pilot flame is proved.
If ignition system self corrects within
10 seconds, ignition module returns
to normal operation. If flame sense
out of sequence continues, module
changes to Flash Code 6+4.
Module will not proceed to trial for
ignition. When fault is corrected,
module resumes trial for ignition,
after a one minute delay.
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Possible Causes
None
None
None
If pilot burner fails to light on
next trial for ignition - check:
1. Gas supply.
2. Pilot burner.
3. Spark/flame sense wiring.
4. Flame sense electrode
contaminated or out of
position.
5. Pilot burner ground.
1. Check pilot burner.
A. If pilot flame present,
replace gas valve. If
no pilot flame, cycle
Call for Heat, or
power.
B. If error repeats
(continual or
intermittent), replace
ignition module.
1. Check spark/flame sense
wiring.
2. Check flame sense
electrode position.
3. Check flame sense
electrode ceramic for
cracks.
F25377 (March 2010)