| LED correct operating condition | Fault indication | Possible causes and corrective action |
|---|---|---|
| Power-On (green) | Off | System power is not supplied to card due to a possible line power problem. Check the power connections. |
| Internal fault. Contact technical support. | ||
| Error-Off | Red (continuous) | Controller is not scanning card. Check controller operation. |
| Card failed self-test. Contact technical support. | ||
| Red (flashing) | Controller is not scanning card. Check controller operation. | |
| Address conflict. Replace card with known good card of same type; contact technical support. |