Power Supply Leds - Cisco 7000 Hardware Installation And Maintenance

Power Supply LEDs

Power Supply LEDs
There are two types of power supplies for the Cisco 7000: AC-input and DC-input.
Each AC-input power supply contains AC power and DC fail LEDs and a power switch as shown in
Figure B-2. The green AC power LED indicates that the power supply is turned on and is receiving
input AC power. The yellow DC fail LED is normally off, but goes on if the power supply shuts down
for any of the following reasons:
•
•
In systems with a single AC-input power supply, and in systems with redundant power when both
AC-input power supplies are being shut down, the DC fail LED goes on momentarily as the system
ramps down, but is off when the power supply has completely shut down. In systems with redundant
power, and one power supply is still active, the DC fail LED on the failed power supply will remain
on (powered by the active supply).
Figure B-2
The DC-input power supply LEDs include the input power LED and the out fail LED. (See
Figure B-3. Note that the LEDs are in a similar location to the AC-input power supply shown in
Figure B-2.) The green input power LED is on when the input power is applied. The yellow out fail
LED is normally off, but flashes at power on for a lamp test.
The out fail LED goes on if the power supply shuts down for either of the following reasons:
•
•
B-264 Cisco 7000 Hardware Installation and Maintenance
Power supply DC section failure, which could be caused by loss of AC power (input line failure
or operator turned off system power) or an actual failure in the power supply
Power supply shutdown initiated by the power supply because it detected an out-of-tolerance
temperature or voltage condition in the power supply
AC-Input Power Supply LEDs
LEDs
AC power
receptacle
Power supply DC-output failure, which could be caused by loss of DC-input power (input line
failure or operator turned off system power) or an actual failure in the DC-input power supply
Power supply shutdown, initiated by the power supply because it detected an out-of-tolerance
temperature or voltage condition in the power supply
Captive
installation
screw
On/off switch Locking device
Power supply
front panel