H3C Technologies H3C SecPath F5000-A5 Firewall - Manual (Page 106)

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Fan tray LEDs
Figure 72 Fan tray LEDs
Table 30 LED description
LED Status Description
(green)
Off No system power input is present or the fan tray is faulty.
On The fan tray is operating correctly.
(red)
Off The fan tray is operating correctly.
On The fan tray is faulty.