40 PNEG-308 Purafire
12. Troubleshooting Guide
Indicator Possible Cause Corrective Action
LED ON Normal operation. No problem.
LED OFF Unit does not operate. See #1 of the Troubleshooting Guide.
LED FLASH
1. One (1) flash
1. Air proving switch contacts closed before
blower operation was initiated.
1. See #6 of Troubleshooting Guide.
2. Two (2) flashes
2. Air proving switch contacts did not close or
air proving switch opened after flame has
been detected.
2. See #3, #5 and #7 of Troubleshooting Guide.
3. Three (3) flashes 3. Burner does not light and/or does not stay lit. 3. See #9 and #10 of Troubleshooting Guide.
4. Four (4) flashes
4. Flame signal interrupted during ignition trial,
or defective flame safeguard relay
module (FSR).
4. See #13 of Troubleshooting Guide. Replace
the FSR module.
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