Table 2-14: Avu Leds - Nera WiLink-I Series System Manual

Chapter 2 - Installation Guidelines
availability, the chassis can operate with the hot-swappable fan tray extracted
from it for a period of time sufficient for replacing it (up to 10 minutes).
LED Status
PWR
Off
Red
Green
Green
If the red ALRM LED is on while the PWR LED is green, it indicates a failure of at
least one fan. Although the Base Station chassis may continue operating with one
failed fan, it is recommended to replace the AVU as soon as possible.
To replace an AVU drawer:
Release the 4 screws securing the AVU to the chassis.
Using the handle take out the faulty chassis.
Insert a new AVU drawer and close the screws. The replacement should be
completed in less than 10 minutes.
2.2.11.1 Replacing an NPU
To minimize downtime and facilitate fast and easy NPU replacement, it is
recommended to maintain an updated copy of the NPU configuration. Refer to
Section 4.5.2.6
configuration.
Release the screws at the top and the bottom of the NPU's front panel.
1
Press the handles' red button until the handles are unlocked.
2
Wait until the blue HOT SWAP LED turns on, indicating that the module has
3
been disconnected and can be removed.
Press the handles down (the upper handle)/up (the lower handle) until the
4
module is unlocked. Firmly hold the handles and take the module out of the
chassis.
48

Table 2-14: AVU LEDs

ALRM
Off
Red
Red
Off
for details on preparing and uploading a backup file of the NPU
Description
No 5V power input
12V power failed
One or more fans have failed
AVU operates properly
Installation