Table 99: T640 Power Supply Alarm Messages - Juniper T640 Hardware Manual

Table 99: T640 Power Supply Alarm Messages

Alarm Type LCD Message
Red
PEM pem-number Over Temp
PEM pem-number Output Fail
PEM pem-number Input Fail
Yellow
PEM pem-number Removed
PEM pem-number Inputs Cfg
Solution
Copyright © 2017, Juniper Networks, Inc.
The blue LED is not lit when the power switch on the power supply faceplate
DC OK
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 AC OK LED is off when the power supply is not receiving source AC power.
The blue LED is off.
DC OK
If the blue DC OK LED blinks but is not going through a startup test, the power supply
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 99 on page 477, 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
To troubleshoot the T640 power system:
If the LED on one of the power supplies lights, check the fans and air
OVER TEMP
1.
filters in the chassis to be sure they are functioning and providing sufficient airflow.
Check the display on the craft interface. The Junos OS constantly updates the screen
2.
with status information for each component. For more information about the display,
see "T640 Craft Interface Description" on page
NOTE: On the display and in the CLI, the power supplies are referred to
as PEM0 and
Chapter 33: Troubleshooting Components
LED lights when the power supply is not receiving enough
command.
CLI Message
PEM pem-number Over Temperature
PEM pem-number Output Failure
PEM pem-number Input Failure
PEM pem-number Removed
PEM pem-number Configuration
Mismatch-number of inputs
22.
PEM1 , from top to bottom.
477