Replacing A Fan Tray Or Air Filter; Replacing The Cisco 2911 Fan Tray - Cisco WS-C2950-24 Installation Manual

Chapter 5 Installing and Upgrading Internal Modules and FRUs

Replacing a Fan Tray or Air Filter

The Cisco 2900 series and 3900 series routers have hot-swappable fan trays and air filters that are field
replaceable units (FRUs). The fan tray includes all of the router fans in one assembly. If a fan fails,
replace the tray using a flat-blade or Phillips screwdriver.
We recommended replacing fan filters every six months, or when dirty, whichever comes first.
Note
Before Hot-Swapping a Fan Tray
Before hot-swapping a fan tray, read the safety precautions below.
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Cisco 2911
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Cisco 2921 and Cisco 2951
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Cisco 2900 and Cisco 3900 Series
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Replacing the Cisco 2911 Fan Tray

To hot-swap a fan tray, complete the following steps:
If hot-swapping the fan tray, it is recommended to complete the operation within 2 minutes to ensure the
Note
router remains within operating temperature.
Read the
Step 1
perform any module replacement.
Unsnap the bezel by pulling it straight out from the chassis. See
Step 2
OL-18712-03
Read the entire procedure and have the required tools available.
Do not attempt the hot-swap in ambient air temperature above 90°F (32°C).
Do not attempt the hot-swap at an altitude above 6000 feet (1829 meters).
When the router is being operated, it is recommended to change the fans within the following times
to ensure the router does not overheat:
Cisco 2911 within 2 minutes
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Cisco 2921 or 2951 within 2 minutes
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Cisco 3900 series within 1.5 minutes
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Replacing the Cisco 2911 Fan Tray section, page 5-45
Replacing the Cisco 2911 Air Filter section, page 5-46
Replacing the Cisco 2921 or 2951 Fan Tray section, page 5-47
Replacing the Cisco 3900 Series Fan Tray section, page 5-48
Replacing the Cisco 3900 Series Air Filter section, page 5-49
"Safety Warnings" section on page 5-2 section and disconnect the power supply before you
Figure
Cisco 2900 Series and 3900 Series Hardware Installation Guide
Replacing a Fan Tray or Air Filter
5-33.
5-45