| LED correct operating condition | Fault indication | Probable cause and corrective action |
|---|---|---|
| Power-On (green) | Off | System power is not supplied to unit due to a possible input power problem. Check the power supply connections and the bulk power supply connections. |
| Internal fault | Contact technical support. | |
| Error-Off (red) | On (continuous) | Unit failed a self-test. Contact technical support. |
| On (flashing) | The CPU is not scanning the card. Check the CPU's operation. | |
| Hardware error | Replace the card with a good card of the same type and contact technical support. |