Juniper T640 Hardware Manual page 242

T640 Core Router Hardware Guide
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Documentation
210
supply, or that the power switch on the AC power supply or six-input DC power
supply is switched to the on position (
Verify that the source circuit breaker is on and that the power supply is receiving
5.
voltage. If the AC OK on AC power supplies or
240-A DC power supply or four-input 240-A power DC supply are not lit, it indicates
that the power supply is not receiving source power.
Verify that the source circuit breaker has the proper current rating. Each input on each
6.
power supply must be connected to a separate circuit breaker.
Verify that the AC power cord or DC power cables from the power source to the router
7.
are not damaged. If the insulation is cracked or broken, immediately replace the
damaged cable or cord.
Connect the power supply to a different power source with a new DC power cable or
8.
AC power cord. If the power supply
is the source of the problem. Replace the power supply with a spare.
If the DC OK LED on the installed spare lights, the replaced power supply is faulty.
9.
Return it for replacement, as described in
Networks, Inc." on page
If you cannot determine the cause of the problem or need additional assistance, see
10.
"Contacting Customer Support" on page
T640 Power System Description on page 60
Replacing a T640 Two-Input 160-A DC Power Supply on page 308
Replacing a T640 Three-Input 240-A DC Power Supply on page 314
Replacing a T640 Four-Input 240-A DC Power Supply on page 323
Replacing a T640 Six-Input DC Power Supply on page 329
Replacing a T640 DC Power Supply Cable on a Two-Input 160-A Power Supply,
Three-Input 240-A DC Power Supply, or a Four-Input 240-A DC Power Supply on
page 334
Replacing a T640 DC Power Supply Cable on a Six-Input DC Power Supply on page 341
Replacing a T640 Three-Phase Delta AC Power Supply on page 354
Replacing a T640 Three-Phase Delta AC Power Supply Cord on page 361
Replacing a T640 Three-Phase Wye AC Power Supply on page 365
Replacing a T640 Three-Phase Wye AC Power Supply Cord on page 370
T640 General Electrical Safety Guidelines and Electrical Codes on page 404
).
|
INPUT PRESENT
LED still does not light, the power supply
DC OK
"Returning a Hardware Component to Juniper
461.
461.
LEDs on a three-input
Copyright © 2013, Juniper Networks, Inc.