Replacing Upper Or Lower Fan Tray - Cisco ASR 5000 Installation Manual

Replacing Upper or Lower Fan Tray

The upper fan tray draws air up through the chassis for cooling and ventilation. It then exhausts the heated
air through the vents at the upper-rear of the chassis.
The lower fan tray draws air from the front and sides and pushes it through the chassis for cooling and
ventilation.
Caution Do not operate the chassis without the fan tray(s) installed. Doing so even for short periods of time may
cause the system to overheat and result in component damage.
This chapter provides instructions for the removal and replacement of the upper and lower fan tray assemblies
should there be a partial or complete failure of either one.
Caution During installation, maintenance, and/or removal, wear a grounding wrist strap to avoid ESD damage to
the components. Failure to do so could result in damage to sensitive electronic components and potentially
void your warranty.
This chapter includes the following sections:
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Determining Whether a Fan Tray Needs Replacing
The system has several ways to indicate a fan tray failure. The first indicator is that the Status LED on the
System Resource Card (SRC) turns red to indicate the failure of a chassis component.
Determining Whether a Fan Tray Needs Replacing, page 205
Removing an Upper Fan Tray, page 207
Installing an Upper Fan Tray, page 208
Removing a Lower Fan Tray Assembly, page 209
Installing a Lower Fan Tray Assembly, page 210
What to do with the Failed Fan Tray, page 212
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