3-6
Cisco UCS C220 M4 Server Installation and Service Guide
OL-32473-01
Chapter 3 Maintaining the Server
Status LEDs and Buttons
5
1-Gb Ethernet link status
•
Off—No link is present.
•
Green—Link is active.
•
Green, blinking—Traffic is present on the active link.
6
Rear unit identification
•
Off—The unit identification LED is not in use.
•
Blue—The unit identification LED is activated.
7
Power supply status
AC power supplies:
•
Off—No AC input (12 V main power off, 12 V standby power off).
•
Green, blinking—12 V main power off; 12 V standby power on.
•
Green, solid—12 V main power on; 12 V standby power on.
•
Amber, blinking—Warning threshold detected but 12 V main power on.
•
Amber, solid—Critical error detected; 12 V main power off (for example,
over-current, over-voltage, or over-temperature failure).
DC power supply (UCSC-PSUV2-1050DC):
•
Off—No DC input
(12 V main power off, 12 V standby power off).
•
Green, blinking—
12 V main power off; 12 V standby power on.
•
Green, solid—
12 V main power on; 12 V standby power on.
•
Amber, blinking—
Warning threshold detected but 12 V main power on.
•
Amber, solid—
Critical error detected; 12 V main power off (for example,
over-current, over-voltage, or over-temperature failure).
Table 3-2
Rear Panel LEDs, Definitions of States (continued)
LED Name
State
