Replacing A Front Air Filter Element On A T640 Ac Or Dc Power Supply; Removing A Front Air Filter Element On A T640 Ac Or Dc Power Supply - Juniper T640 Hardware Manual

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Replacing a Front Air Filter Element on a T640 AC or DC Power Supply

Copyright © 2013, Juniper Networks, Inc.
Connect the AC power cord to the AC power source.
17.
Switch on the customer site circuit breakers to provide voltage to the AC power source
18.
cables.
Remove the ESD grounding strap from the approved site ESD grounding point. See
19.
the instructions for your site. Reconnect the strap to one of the ESD points on the
chassis.
Verify that the LED on the power supply faceplate is lit steadily, indicating that
20. AC OK
the AC terminal block is receiving power.
Switch the power switch on the power supply to the
21.
Verify that the LED on the power supply faceplate is lit steadily, indicating that
22. DC OK
the power supply is correctly installed and is functioning properly. The
blinks momentarily, then lights steadily.
NOTE: After a power supply is powered on, it can take up to 60 seconds
for status indicators—such as the LEDs on the power supply, the command
output displays, and messages on the LED display on the craft interface—to
indicate that the power supply is functioning normally. Ignore error
indicators that appear during the first 60 seconds.
T640 Three-Phase Delta and Wye AC Power Supply Description on page 71
T640 Three-Phase Delta and Wye AC Power Supply LEDs on page 74
Troubleshooting the T640 Power System on page 207
T640 Preventing Electrostatic Discharge Damage on page 386
T640 AC Power Cord Specifications on page 439
You can use this procedure for a two-input 160-A DC power supply, three-input 240-A
DC power supply, four-input 240-A DC power supply, three-phase delta AC power supply,
or three-phase wye AC power supply.
Removing a Front Air Filter Element on a T640 AC or DC Power Supply on page 373
1.
Installing a Front Air Filter Element on a T640 AC or DC Power Supply on page 374
2.

Removing a Front Air Filter Element on a T640 AC or DC Power Supply

To remove a power supply (see
Attach an electrostatic discharge (ESD) grounding strap to your bare wrist, and connect
1.
the strap to one of the ESD points on the chassis.
Grasp the filter cover on the power supply faceplate and pull it straight off the power
2.
supply.
Chapter 17: Replacing T640 Router Hardware Components
ON
Figure 232 on page 374):
position ( ).
|
LED
DC OK
373