HPE FlexFabric 12908E, User Manual

The fan tray is hot swappable. Follow these guidelines when you replace the 

fan tray on an operating switch:

Ensure electrical safety. 

Replace a fan tray only when the other fan tray is operating correctly. 

To prevent dust from entering the chassis, keep the failed fan tray in 

position before the replacement.

When you hot-swap a fan tray, the remaining fan tray automatically 

increases the fan rotation speed and makes louder noise. Take protection 

measures such as wearing an earmuff or earplug. In addition, make good 

preparation before the hot-swapping to minimize the operation time.

Before you install or replace a switching fabric module on an operating switch, 

first remove the fan tray. Install the fan tray immediately after you finish 

installing or replacing the switching fabric module.

For good ventilation, purchase and install filler panels in empty switching fabric 

module slots.

Long-time exposure to strong air flow might cause discomfort. To avoid this 

hazard, do not stand close to the air outlet vents while the switch is operating. 

If you must be next to the switch on the air outlet vent side for an extended 

period, avoid the air flow or take other protective measures.

Tools required

2

1

Overview

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BOM: 3101A0LJ     Part number: 5200-1257

HPE FlexFabric 12908E LSXM108XFANH Fan Tray User Manual-APW100

HPE FlexFabric 12908E Spare High Speed Fan Tray Assembly (JH424A)  contains 

three fans and provides a maximum airflow of 930 Cubic Feet per Minute (CFM). 

When the fan tray is operating, ambient air flows in through the air vents in the 

MPU and LPU panels, circulates through the switching fabric module section, and 

exhausts through the air vents in the fan tray. 

Installing a fan tray

The following procedure uses the 12908E switch as an example to describe 

fan tray installation.

The 12908E switch has two fan tray slots: FAN1 and FAN2. One fan tray is 

sufficient for heat dissipation of the switch. As a best practice, install two fan 

trays on the switch for redundancy and noise reduction.

Switching

fabric module 

status LED

 Fan

Panel side view 

Fan side view 

Fan tray status 

LED 

To avoid device damage and bodily injury, use two people to install or remove 
the fan tray. 

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Handle

Captive 
screw

ESD wrist strap

Phillips screwdriver