| LED correct operating condition | Fault indication | Possible cause and corrective action |
|---|---|---|
| Power-On (green) | Off | Power is not supplied to card. Check the power connections. |
| Internal fault. Contact technical support. | ||
| Error-Off | Red (continuous) | Communications error. Check connections, cable, and external device. |
| Red (flashing) | Address conflict. Replace card with know good card of same type; contact technical support. |