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Ruckus ICX 7750 Switch Hardware Installation Guide
63
Part Number: 53-1003900-10
Managing the Ruckus ICX 7750
Replacing a power supply unit
NOTE
This document describes how to change FRUs for units with either an air intake or air exhaust. You must replace a failed FRU with
a FRU of the same type. This applies to both power supplies and fans. A new FRU must have the same part number (P/N) as the
FRU being replaced. The manufacturing P/N is located on the top of the FRU.
If a mismatched power source or fan tray is installed by mistake, a warning is sent to the console. The warning messages will be similar to
the following:
•
For a fan mismatch: [WARNING, Ruckus ICX 7750, MISMATCH in Fan Air Flow direction. Replace FRU with fan air flows in the
same direction.
•
For a power supply: [WARNING, Ruckus ICX 7750, MISMATCH in PSU Air Flow direction. Replace PSU with air flows in the
same direction
You can use external labels as a guide. The power supplies and fan trays are labeled with an airflow symbol on the faceplate to indicate
whether the assembly takes in or exhausts air. The symbol also appears on the top of the FRU. All FRUs in a chassis must have the same
label affixed so that airflow direction is consistent.
illustrates examples of the airflow labels.
FIGURE 42
Examples of airflow symbols
The green
E
symbol indicates an exhaust FRU. This unit pulls air in from the front of the switch and exhausts it out the rear side. This is
called front-to-back airflow or forward airflow.
The orange
I
symbol indicates an intake FRU. This unit pulls air in from the rear side of the switch and exhausts it out the front side. This is
called back-to-front airflow or reverse airflow.
The
show chassis
command displays a device’s airflow direction: Front-to-Back or Back-to-Front.
Replacing a power supply unit
NOTE
Maintain all power supply and fan trays in operational condition to provide redundancy.
CAUTION
Remove the power cord from a power supply before you install it in or remove it from the device. Otherwise, the power supply
or the device could be damaged as a result. (The device can be running while a power supply is being installed or removed,
but the power supply itself should not be connected to a power source.)
CAUTION
For the Ruckus ICX 7750 devices, be sure that the airflow direction of the power supply unit matches that of the installed fan
tray. The power supplies and fan trays are clearly labeled with either a green arrow with an “E”, or an orange arrow with an “I.”