Qfx5120 Fan Module Status; Qfx5120 Power System - Juniper QFX5120 Series Hardware Manual

In data center deployments, position the switch in such a manner that the AIR IN labels on switch
components are next to the cold aisle, and AIR OUT labels on switch components are next to the hot aisle.

QFX5120 Fan Module Status

Each switch has a status LED for each fan module next to the fan module slot on the rear panel of the
chassis. The Status LED indicates the status of the fan module.
LED on the fan module in an QFX5120 switch.
Table 13: Fan Module Status LED
LED Color
Status Green
Amber
Under normal operating conditions, the fan modules operate at a moderate speed. Temperature sensors
in the chassis monitor the temperature within the chassis.
The system raises an alarm if a fan module fails or if the ambient temperature inside the chassis rises above
the acceptable range. If the temperature inside the chassis rises above the threshold temperature, the
system shuts down automatically.

QFX5120 Power System

IN THIS SECTION
AC Power Supply in QFX5120 Switches | 50
AC Power Supply Specifications for QFX5120 Switches | 52
AC Power Cord Specifications for QFX5120 Switches | 53
AC Power Supply LEDs in QFX5120 Switches | 55
DC Power Supply in QFX5120 Switches | 57
State Description
On steadily The fan module is functioning normally.
Blinking An error has been detected in the fan module. Replace the fan
module as soon as possible. Either the fan has failed or it is
seated incorrectly. To maintain proper airflow through the
chassis, leave the fan module installed in the chassis until you
are ready to replace it.
Table 7 on page 36 describes the Status
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