Juniper MX240 Hardware Manual page 358

MX240 5G Universal Routing Platform Hardware Guide
358
To restart a high-capacity AC power supply after a shut down due to an
over-temperature situation:
Move the power switch on the power supply to the off (o) position.
1.
Turn off power to where the AC line goes into the power distribution module (PDM)
2.
area.
Wait for the power supply LEDs to fade out and for the fans inside the power supply
3.
to shutdown. This can take up to 10 seconds.
CAUTION: Do not attempt to power-on the power supply if the LED is
still lit and the fan is still running. If you do, the router will not reboot.
Turn on power to where the AC line goes into the power distribution module (PDM)
4.
area.
Move the power switch on the power supply to the on (|) position.
5.
Verify that the LEDs on the power supply faceplate are properly lit.
6.
Issue the CLI show chassis environment pem
7.
and the Temperature is
To restart a high-capacity DC power supply after a shut down due to an
over-temperature situation:
Switch off the circuit breaker(s) on the DC distribution panel to remove power to
1.
the chassis and power supplies.
Switch on the circuit breaker(s) on the distribution panel to power up the chassis
2.
and power supplies.
NOTE: The power switch on the power supplies is not part of the outer
or inner DC circuits and therefore does not need to be switched off when
restarting the chassis.
command and verify the State is
.
OK
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