Cisco UCS C220 M4 Maintaining The Server page 2

Status LEDs and Buttons
Status LEDs and Buttons
This section describes the location and meaning of LEDs and buttons and includes the following topics
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•
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Front Panel LEDs
Figure 3-1
Figure 3-1
1
2
3
4
5
Cisco UCS C220 M4 Server Installation and Service Guide
3-2
Front Panel LEDs, page 3-2
Rear Panel LEDs and Buttons, page 3-5
Internal Diagnostic LEDs, page 3-7
shows the front panel LEDs.
Front Panel LEDs
BAY 02
BAY 01
BAY 05
BAY 04
Hard drive fault LED
Note: NVMe PCIe SSDs drive tray LEDs
have slightly different behavior. See
for the LED states.
Hard drive activity LED
Power button/power status LED
Identification button/LED
System status LED
Table 3-1 defines the LED states.
3 4
1 2
BAY 03
BAY 06 BAY 07
6
Fan status LED
Table 3-1
7
Temperature status LED
8 Power supply status LED
9 Network link activity LED
Chapter 3 Maintaining the Server
6 8
5 7 9
BAY 08
OL-32473-01