| State | Cause | Solution |
|---|---|---|
| All LED indicators are OFF after power supply is connected | The power line is not operational | Check if the GSR is turned OFF |
 |
Check the connection of RJ45 cable | |
| Signaling LEDs should be ON but it is not lit | The voltage is not sufficient to activate the input | Check whether the voltage is within the operating range of the specific input |
| |
Check physical connections | |
| Device has not already started | Wait for 5 minutes to be sure that the device is fully functional |
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