Maintaining The Power Supplies - Juniper M10i Hardware Manual

M10i Internet Router Hardware Guide

Maintaining the Power Supplies

To verify that the power supplies are functioning normally, perform the following
procedures regularly:
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Maintaining the Power Supplies
unplugging is then absorbed by the short fiber extension, which is easy and
inexpensive to replace.
Keep fiber-optic cable connections clean. Small micro-deposits of oil and dust
in the canal of the transceiver or cable connector could cause loss of light,
reducing signal power and possibly causing intermittent problems with the optical
connection.
To clean the transceivers, use an appropriate fiber-cleaning device, such as
RIFOCS Fiber Optic Adaptor Cleaning Wands (part number 946). Follow the
directions for the cleaning kit you use.
After you have cleaned the transceiver on the fiber-optic PIC, make sure that the
connector tip of the fiber-optic cable is clean. Use only an approved alcohol-free
fiber-optic cable cleaning kit, such as the Opptex Cletop-S® Fiber Cleaner. Follow
the directions for the cleaning kit you use.
Check that the green
OUTPUT OK
For more information about the LED, see
Issue the following CLI command to check the status of the power supplies. As
shown in the sample output, the value
the power supply is operating normally:
user@host> show chassis environment
Class Item
Power Power Supply A
Power Supply B
...
For further description of the output from the command, see the JUNOS System
Basics and Services Command Reference.
Check the red and yellow alarm LEDs on the HCM. Power supply failure or
removal triggers an alarm that causes one or both of the LEDs to light. You can
display the associated error messages by issuing the following CLI command:
user@host> show chassis alarms
For a list of possible alarm messages, see
Messages" on page 80.
LED is lit on the faceplate of both power supplies.
"Power Supply LED"
in the column indicates that
OK Status
Status Measurement
OK
OK
"Hardware and Interface Alarm
on page 22.