Unit installation

Maintenance RSU-503 Redundancy Switch Unit
4–2 Rev. 8
4.2 Internal Indicators
The switch does not have any external indicators. The internal indicators (shown in
Figure 4-1) are not normally used by the operator. However, if the switch must be
opened, descriptions of the indicators are provided in the following table.
Indicator LED Cause
System Status
PWR A Green Illuminates if RFT A power is available.
PWR B Green Illuminates if RFT B power is available.
32V Green Illuminates when power available to switches.
SUM FLT Red Illuminates an ambiguity failure, RFT fault, or power supply
fault.
Uplink
FLT A Red Illuminates with failure of unit A uplink.
FLT B Red Illuminates with failure of unit B uplink.
FLT AMB Red Illuminates if uplink switch indicators do not agree.
B OL Yellow Illuminates when unit B uplink is online.
MAN Yellow Illuminates when uplink is in manual mode.
Downlink
FLT A Red Illuminates with failure of unit A downlink.
FLT B Red Illuminates with failure of unit B downlink.
FLT AMB Red Illuminates if downlink switch indicators do not agree.
B OL Yellow Illuminates when unit B downlink is online.
MAN Yellow Illuminates when downlink is in manual mode.
Figure 4-1. LED and Switch Locations