14-6
Cisco 1240 Connected Grid Router Hardware Installation Guide
OL-26223-04
Chapter 14 Router LED Locations and States
LED Locations and State Descriptions
Battery Backup Unit LED
The router supports up to three battery backup units (BBUs). When two or more BBUs are installed, they
are connected to each other in a head-to-tail configuration in the router and the BBU LED are in the
locations shown in
Figure 14-3
.
To see the LED for each BBU, open the router chassis according to the
“Opening the Router Chassis”
chapter.
Figure 14-3
Battery Backup LED Location
LED
Color and State
Description
BBU (no label)
Green solid
Idle state
Green blinking
Charging
Amber blinking
Discharging (providing power to the system)
Amber slow blinking
Disabled with the system software
Alternate Red/green blinking
Initializing
Red blinking
Bootloader mode
Red slow blinking
Test mode
Red solid
BBU failure
Off
Disconnected from router or completely
discharged
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