Brocade ICX 6650 Hardware Installation Guide - Manual (Page 64)

FRU removal and replacement procedures
The field-replaceable units (FRUs) in the Brocade ICX 6650 can be removed and replaced without
special tools. The switches can continue operating during the FRU replacement if the conditions
specified in these procedures are followed. This covers both the power supply unit (PSU) FRUs and
fan FRUs.
CAUTION
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 assembly 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, Brocade ICX 6650, MISMATCH in Fan Air Flow direction.
Replace FRU with fan air flows in the same direction.
• For a power supply: WARNING, Brocade ICX 6650, 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 assemblies 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.
FIGURE 24 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.
FRU removal and replacement procedures
62 Brocade ICX 6650 Hardware Installation Guide
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