Juniper MX480 - Page 255

7. Check the INPUT OK LED is lit steadily green to verify that power is present.
8. If power is not present:
•
Verify that the fuse is installed correctly and turn on the breaker at the battery
distribution fuse board or fuse bay.
•
Check the voltage with a meter at the terminals of the power supply for correct
voltage level and polarity.
9. On each of the DC power supplies, switch the DC circuit breaker to the center position
before moving it to the on (—) position.
NOTE: The circuit breaker may bounce back to the off (O) position if you
move the breaker too quickly.
If any of the status LEDs indicates that the power supply is not functioning normally,
repeat the installation and cabling procedures described in “Replacing an MX480 DC
Power Supply” on page 370.
10. Verify that the BREAKER ON LED is lit green steadily.
11. Verify that the PWR OK LED is lit green steadily, indicating the power supply is correctly
installed and functioning normally.
If the power supply is not functioning normally, repeat the installation and cabling
procedures described in “Replacing an MX480 DC Power Supply” on page 370.
NOTE: After powering off a power supply, wait at least 60 seconds before
turning it back on. After powering on a power supply, wait at least 60
seconds before turning it off.
If the system is completely powered off when you power on the power
supply, the Routing Engine (or RCB) boots as the power supply completes
its startup sequence. If the Routing Engine finishes booting and you need
to power off the system again, first issue the CLI request system halt
command.
After a power supply is powered on, it can take up to 60 secondsfor status
indicators—such as the status LEDs on the power supply and the
show chassis command display—to indicate that the power supply is
functioning normally. Ignore error indicators that appear during the first
60 seconds.
12. On the external management device connected to the Routing Engine, monitor the
startup process to verify that the system has booted properly.
225Copyright © 2017, Juniper Networks, Inc.
Chapter 17: Connecting the MX480 Router to Power