User's Manual

Replacing an RAU
8-2 InterReach Unison Installation, Operation, and Reference Manual
CONFIDENTIAL D-620003-0-20 Rev J
Perform System Test
When convenient, perform System Test to optimize performance.
During System Test, the entire system is temporarily off-line and no RF is
being transmitted. For a fully loaded system (one Main Hub, four Expansion
Hubs, and 32 RAUs), it can take up to 1.5 minutes to complete the test.
Checking the RAU’s LEDs
1. The RAU’s LINK and ALARM LEDs should blink (green/red) on power up.
• If the LEDs do not blink on power up, replace the RAU.
2. After several seconds both LEDs should change to green, which indicates that the
unit has been successfully replaced, there is communication with the Expansion
Hub, and the RAU band is correct.
a. If the LINK LED remains green and the ALARM LED remains red, verify that
the RAU model is correct for the intended frequency band.
– Disconnect the cable and then reconnect it once; doing this more than once
will not change the result.
b. If both LEDs still don’t change to green, use the AdminManager to determine
the exact nature of the fault and see a recommendation of how to correct it.
c. If both LEDs turn red (after 90 seconds), the Expansion Hub has terminated
communications.