Comtech EF Data CRS-500 - Manual (Page 133)

CRS-500 1:N Redundancy System Revision 2
CSU Front Panel Operation MN-CRS500
7–17
Alarms Masked: Tx
PSU-B All-Audio
This screen displays currently masked alarms. If an alarm is not masked, its relevant screen
position appears blank.
7.2.2.2.7 Info: IF-SW
IF Switch:
Present
This screen indicates the presence or absence of a CRS-282xx Tx and/or Rx IF Switch Unit (ISU). If
there is an ISU present in the CRS-500 1:N Redundancy System, this screen indicates this by
displaying “Present” – otherwise, if no ISU is installed, this screen displays “Absent.”
7.2.2.3 SELECT: Status
STATUS: Alarms Events
Temp Types Comms
Use the ◄ ► arrow keys to select Alarms, Events, Temp, Types, or Comms, and then press
ENTER.
7.2.2.3.1 STATUS: Alarms
The following are examples of possible switch status displays, along with suggestions to assist
you in diagnosing the reason for the fault.
Example 1:
Switch Alarm: NONE
There are no faults. The front panel LED “Unit Status” should be green.
Example 2:
Switch Alarm:
PSA 12V under/over
There is a fault. Power Supply “A” is under/over voltage. The front panel LED “Unit Status” will
be red.
Suggestions:
• Ensure the power supply cord is connected and the power switch is ON.
• Replace the defective power supply module.