Table 6: Fan Assembly LED Descriptions
Status
Color
LED
Fans are operating normally.
Green
STATUS
One or more fans have failed.
Flashing Amber
Fan tray is inserted and waiting to come online.
Amber
Fan tray is not receiving power.
Off
Power Supply LEDs
Table 7: Power Supply LED Descriptions
Status
FAIL LED
OK LED
Power supply is on and outputs power to the router.
Off
Green
Power supply is connected to AC power source but does not output
power to the router. The power supply may not be properly installed
in the chassis.
Off
Flashing Green
Either one uninstalled power supply or all installed power supplies
are not receiving power.
Off
Off
Power supply is operating but a warning condition has occurred;
possibly one of the following conditions:
• High temperature
• High power
• Slow power supply fan
• Low voltage
• Power supply is installed in the chassis but has been disconnected
from the power source
Flashing Amber
Off
Power supply failure—possibly one of the following conditions:
• Over voltage
• Over current
• Over temperature
• Power supply fan failure
Amber
Off
Cisco NCS 540 Router Hardware Installation Guide
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LEDs
Power Supply LEDs