7. 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.
8. Attach an ESD grounding strap to your bare wrist and connect the strap to one of the
ESD points on the chassis.
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.
10. Observe the status LEDs on each power supply faceplate. If a DC power supply is
correctly installed and functioning normally, the PWR OK, BRKR ON, and INPUT OK
LEDs light green steadily.
11. If any of the status LEDs indicates that the power supply is not functioning normally,
repeat the installation and cabling procedures .
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 Engineboots as the power supply completesits 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 powersupply 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 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.
Related
Documentation
Installing an MX240 DC High-Capacity Power Supply•
• Connecting the MX240 Router to Management and Alarm Devices on page 211
• Replacing an MX240 DC Power Supply Cable on page 343
205Copyright © 2017, Juniper Networks, Inc.
Chapter 17: Connecting the MX240 Router to Power
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