Juniper MX480 Hardware Manual page 211

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Copyright © 2019, Juniper Networks, Inc.
Check the voltage with a meter at the terminals of the power supply for correct
voltage level and polarity.
On each of the DC power supplies, switch the DC circuit breaker to the center position
9.
before moving it to the on (
NOTE: The circuit breaker may bounce back to the off (
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
Power Supply" on page
Verify that the
10. BREAKER ON
Verify that the
11. PWR OK
installed and functioning normally.
If the power supply is not functioning normally, repeat the installation and cabling
procedures described in
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
command.
After a power supply is powered on, it can take up to 60 seconds for status
indicators—such as the status LEDs on the power supply and the
show chassis
functioning normally. Ignore error indicators that appear during the first
60 seconds.
On the external management device connected to the Routing Engine, monitor the
12.
startup process to verify that the system has booted properly.
Installing an MX480 DC High-Capacity Power Supply
Chapter 3: Initial Installation and Configuration
) position.
—
322.
LED is lit green steadily.
LED is lit green steadily, indicating the power supply is correctly
"Replacing an MX480 DC Power Supply" on page
command display—to indicate that the power supply is
) position if you
O
"Replacing an MX480 DC
322.
request system halt
211