Cisco UCS C220 M4

3-3
Cisco UCS C220 M4 Server Installation and Service Guide
OL-32473-01
Chapter 3 Maintaining the Server
Status LEDs and Buttons
3 Power button/LED • Off—There is no AC power to the server.
• Amber—The server is in standby power mode. Power is supplied only to the Cisco
IMC and some motherboard functions.
• Green—The server is in main power mode. Power is supplied to all server
components.
4 Unit identification
• Off—The unit identification function is not in use.
• Blue—The unit identification function is activated.
5 System status
• Green—The server is running in normal operating condition.
• Green, blinking—The server is performing system initialization and memory
check.
• Amber, steady—The server is in a degraded operational state. For example:
– Power supply redundancy is lost.
– CPUs are mismatched.
– At least one CPU is faulty.
– At least one DIMM is faulty.
– At least one drive in a RAID configuration failed.
• Amber, blinking—The server is in a critical fault state. For example:
– Boot failed.
– Fatal CPU and/or bus error is detected.
– Server is in an over-temperature condition.
6 Fan status
• Green—All fan modules are operating properly.
• Amber, steady—One or more fan modules breached the critical threshold.
• Amber, blinking—One or more fan modules breached the non-recoverable
threshold.
7 Temperature status
• Green—The server is operating at normal temperature.
• Amber, steady—One or more temperature sensors breached the critical threshold.
• Amber, blinking—One or more temperature sensors breached the non-recoverable
threshold.
8 Power supply status
• Green—All power supplies are operating normally.
• Amber, steady—One or more power supplies are in a degraded operational state.
• Amber, blinking—One or more power supplies are in a critical fault state.
9 Network link activity
• Off—The Ethernet link is idle.
• Green—One or more Ethernet LOM ports are link-active, but there is no activity.
• Green, blinking—One or more Ethernet LOM ports are link-active, with activity.
Table 3-1 Front Panel LEDs, Definitions of States (continued)
LED Name State