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OV500 SERIES RACK OVEN - TROUBLESHOOTING
IGNITION MODULE TROUBLESHOOTING
SYMPTOM POSSIBLE CAUSES
Diagnostic LED continuous ON - Ignition control
powered, but module does not have outputs at
appropriate times.
1. No draft inducer output.
2. No gas valve output.
3. No ignitor output.
1. Ignition control module malfunction.
2. Incorrect ignition module.
3. Incorrect wiring.
Diagnostic LED '1' flash - Airflow fault. Module
doesn't have draft inducer pressure switch input.
1. Draft inducer pressure switch inoperative.
2. Draft inducer pressure switch tubing malfunction.
3. Draft inducer fan blade damaged or inoperative.
4. Draft inducer motor malfunction.
5. Incorrect pressure switch wiring.
6. Incorrect wiring.
Diagnostic LED '2' flashes - Flame no call for
heat.
NOTE: Flame continues after controller set
temperature is satisfied. (Gas valve sticks
open.)
1. Gas valve malfunction.
Diagnostic LED '3' flashes - No flame sense
after trial for ignition. (3 attempts)
1. Flame sensor rod not positioned correctly or
malfunction.
2. Insufficient flame current.
3. Ignitor malfunction.
4. Gas valve inoperative or improperly adjusted.
5. Late ignition, check gas manifold pressure.
6. Improper flame propagation (flame produced), check
orifice alignment and cross over tube adjustment.
LED DIAGNOSTIC INDICATOR CODES
LED Code
LED off No Fault
LED on Control Fault
'1' Flash Air Flow Fault
'2' Flash Flame No Call For Heat
'3' Flash Ignition Lockout
F25361 (January 2010)
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