Juniper T640 Hardware Manual page 240

T640 Core Router Hardware Guide
208
The yellow
OVER TEMP
airflow to maintain proper temperature.
The following indicate a problem on a three-input 240-A DC power supply or four-input
240-A DC power supply:
The blue DC OK LED is off.
If the blue LED blinks but is not going through a startup test, the power supply
DC OK
detects a fault (the power supply fails, does not have sufficient airflow, or is not
properly inserted).
The yellow OVER TEMP
airflow to maintain proper temperature.
The
INPUT PRESENT
power.
If the
INPUT PRESENT
breaker is off.
The following indicate a problem on a six-input DC power supply:
The yellow OVER TEMP
airflow to maintain proper temperature.
The green
INPUT PRESENT
if the input is not connected or is not receiving source DC power.
The blue DC OK LED is not lit when the power switch on the power supply faceplate
is off, or when a power supply is not functioning normally or is not receiving voltage.
The following indicate a problem on a three-phase delta or wye AC power supply:
The green LED is off when the power supply is not receiving source AC power.
AC OK
The blue DC OK LED is off.
If the blue LED blinks but is not going through a startup test, the power supply
DC OK
detects a fault (the power supply fails, does not have sufficient airflow, or is not
properly inserted).
The yellow
OVER TEMP
airflow to maintain proper temperature.
In Table 44 on page 209, the text in the column labeled "LCD Message" appears in the
display of the craft interface. The text in the column labeled "CLI Message" appears in
the output from the
show chassis alarms
LED lights when the power supply is not receiving enough
LED lights when the power supply is not receiving enough
LED is off, indicating that the input is not receiving source DC
LED is lit but the LED is off, it indicates that the circuit
CB ON
LED lights when a power supply is not receiving enough
LED for each input on a DC power supply does not light
LED lights when the power supply is not receiving enough
command.
Copyright © 2013, Juniper Networks, Inc.