The following table describes the LED indicators for the Remote Interface Unit.
| LED | Correct Operating Condition | Fault Indication | Probable Cause | Corrective Action |
|---|---|---|---|---|
| Green – Power | On | Off | 1. System power is not supplied to unit. Possible line power problem. | 1. Check supply power and connections. |
| 2. Internal fault. | 2. Contact technical support | |||
| Red – Error | Off | On (continuous) | Internal fault. | Contact technical support |
| On for one second followed by all LEDs on for five seconds. | Unit went through RESET due to an unrecoverable software error. | Contact customer support. | ||
| Flashing | The Remote Interface Unit is decommissioned. | Commission the Remote Interface Unit. | ||
| Green – Active | On | Off | 1. Remote Interface Unit is not commissioned. | 1. Commission the Remote Interface Unit. |
| 2. Internal fault. | 2. Contact technical support. | |||
| Flashing | Remote Interface Unit is not configured. | Download configuration. | ||
| Green – Standby | Off (Redundancy not supported) | |||
| Yellow - Pri. CN | Communications attempted and indicator flashing | Off – Communications attempted and indicator not flashing. | Remote Interface Unit lacks active Ethernet communications on primary Control Network connection. | Check primary network cable connections and hub connections. |
| Yellow - Sec. CN | Communications attempted and indicator flashing | Off – Communications attempted and indicator not flashing. | Remote Interface Unit lacks active Ethernet communications on secondary Control Network connection. | Check secondary network cable connections and hub connections. |