GRA SERIES GAS FRYERS - TROUBLESHOOTING
IGNITION MODULE
The ignition module has two LED's; one for flame sensing and one for ignition system status.
• Flame LED (Yellow) - Indicates pilot burner flame presence and signal strength.
• Status LED (Green) - Indicates ignition system operation status and error conditions.
LED Flash Code Descriptions - Flame LED (yellow) or Status LED (green):
• Fast Flash - Rapid blinking during startup and self check.
• Heartbeat - Cycles bright 1/2 second; dim 1/2 second.
• Single Flash - LED flashes X times at 2Hz, remains off for two seconds then repeats flash sequence.
• Double Flash - LED flashes X times at 2Hz, remains off for two seconds, flashes Y times at 2Hz,
remains off for three seconds then repeats flash sequence (X+Y).
FLAME LED CODES (YELLOW) - PART NO. 857207-1 IGNITION MODULE
LED
Flash
Code
Indicates Possible Causes
Heartbeat
Normal pilot flame signal None
2 Weak pilot flame signal. Ignition system will operate
reliably but flame signal is less than desired.
NOTE: Code may flash temporarily just after pilot burner
lights then operate normally after flame signal stabilizes.
Check the following:
1. Gas supply.
2. Pilot burner flame.
3. Spark/flame sense wiring.
4. Flame sense electrode
contaminated or out of position.
5. Pilot burner ground.
1 Marginal pilot flame signal (less than 2 µA). Ignition
system may not operate reliably over time.
NOTE: Code may flash temporarily just after pilot burner
lights then operate normally after flame signal stabilizes..
Check the following:
1. Gas supply.
2. Pilot burner flame.
3. Spark/flame sense wiring.
4. Flame sense electrode
contaminated or out of position.
5. Pilot burner ground.
6. Ignition module malfunction.
OFF No pilot flame or flame sense signal below minimum for
ignition system operation. Pilot burner spark is good.
Check the following:
1. Gas supply.
2. Pilot burner flame.
3. Spark/flame sense wiring.
4. Flame sense electrode
contaminated or out of position.
5. Pilot burner ground.
6. Ignition module malfunction.
F25377 (March 2010)
Page 32 of 36
