Juniper T4000 Hardware Manual page 395

Copyright © 2018, Juniper Networks, Inc.
Verify that the customer site circuit breaker for each input has the proper current
5.
rating.
NOTE: All inputs on a DC power supply in slot PEM0 must be powered
by dedicated power feeds derived from feed A, and all inputs on a DC
power supply in slot PEM1 must be powered by dedicated power feeds
derived from feed B. This configuration provides the commonly deployed
A/B feed redundancy for the system.
Verify that the DC power cables from the power source to the router are not damaged.
6.
If the insulation is cracked or broken, immediately replace the DC power cable .
Connect the power supply to a different power source with a new DC power cable. If
7.
the power supply DC OK
problem. Replace the power supply with a spare. If the
spare still does not light—The replaced power supply might also be faulty. To return
it for replacement, see
If you cannot determine the cause of the problem or need additional assistance, see
8.
"Contacting Customer Support" on page
In Table 88 on page 366, 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 still does not light, the power supply is the source of the
"Contacting Customer Support" on page
375.
command.
Chapter 36: Troubleshooting Components
LED on the installed
DC OK
375.
365