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Cisco UCS C220 Server Installation and Service Guide
OL-25760-01
Chapter 3 Maintaining the Server
Status LEDs and Buttons
Status LEDs and Buttons
This section describes the location and meaning of LEDs and buttons and includes the following topics
• Front Panel LEDs, page 3-2
• Rear Panel LEDs and Buttons, page 3-4
• Internal Diagnostic LEDs, page 3-6
Front Panel LEDs
Figure 3-1 shows the front panel LEDs. Table 3-1 defines the LED states.
Figure 3-1 Front Panel LEDs
1 Power button/Power status LED 6 Power supply status LED
2 Identification button/LED 7 Network link activity LED
3 System status LED 8 Hard drive fault LED
4 Fan status LED 9 Hard drive activity LED
5 Temperature status LED –
Ta b l e 3-1 Front Panel LEDs, Definitions of States
LED Name State
Power button/Power status LED • Off—There is no AC power to the server.
• Amber—The server is in standby power mode. Power is supplied only to the CIMC
and some motherboard functions.
• Green—The server is in main power mode. Power is supplied to all server
components.
Identification • Off—The Identification LED is not in use.
• Blue—The Identification LED is activated.
HDD4 HDD5
HDD1
HDD6
HDD2
HDD7
HDD3
HDD8
8 91 3 4 6
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