H3C Technologies H3C S9500E Series Switches - Manual (Page 23)

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LED Status Description
FAIL (fault)
Steady on
The power supply is experiencing an overvoltage, overcurrent, or
over-temperature condition.
Off The power supply is operating properly or absent.
Fan tray
S9500E fan trays provide the following functions:
• Effective heat dissipation ensures long time operation of the switch.
• Status monitoring, including fan rotation speed monitoring and fault alarming.
• Automatic speed adjustment decreases noise and improves energy efficiency.
• Each fan tray has two LEDs on the front panel to show its operating status.
• The fan trays are hot swappable, and you can replace fan trays without powering off the switch.
IMPORTANT:
The S9505E and the S9512E use the same type of fan trays. The S9508E and the S9508E-V have
chassis-specific fan trays and cannot use the fan trays for any other S9500E switch models.