Replacing An Acx4000 Dc Power Supply; Removing An Acx4000 Dc Power Supply - Juniper ACX4000 Hardware Manual

Replacing an ACX4000 DC Power Supply

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Removing an ACX4000 DC Power Supply | 143

Installing an ACX4000 DC Power Supply | 146
Removing an ACX4000 DC Power Supply
Before you remove a power supply, be aware of the following:
NOTE: The minimum number of power supplies must be present in the router at all times.
WARNING: Before performing DC power procedures, ensure that power is removed
from the DC circuit. To ensure that all power is off, locate the circuit breaker on the
panel board that services the DC circuit, switch the circuit breaker to the off position,
and tape the switch handle of the circuit breaker in the off position.
CAUTION: To maintain proper cooling and prevent thermal shutdown of the operating
power supply unit, each power supply slot must contain either a power supply or a
blank panel. If you remove a power supply, you must install a replacement power supply
or a blank panel shortly after the removal.
NOTE: After powering off a power supply, wait at least 60 seconds before turning it back on.
To remove a DC power supply (see
1. Switch off the dedicated customer site circuit breaker for the power supply being removed. Follow
your site's procedures for ESD.
2. Make sure that the voltage across the DC power source cable leads is 0 V and that there is no
chance that the cables might become active during the removal process.
3. Verify that the status LED on the power supply is not lit.
Figure 14):
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