Juniper MX2020 Hardware Manual page 26

MX2020 3D Universal Edge Router Hardware Guide
Chapter 22
Part 4
Chapter 23
Chapter 25
Part 5
Chapter 27
xxvi
Installing and Replacing Components . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 293
Table 91: Supported Three-Phase Delta AC Wire Gauge . . . . . . . . . . . . . . . . . . . 327
Table 92: Supported Three-Phase Wye AC Wire Gauge . . . . . . . . . . . . . . . . . . . . 331
Maintaining the Chassis and Components
Maintaining Components . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 337
Table 93: Effect of Taking the Host Subsystem Offline . . . . . . . . . . . . . . . . . . . . 403
Replacing Components . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 415
Table 94: Tools and Parts Required for Component Replacement . . . . . . . . . . . 416
Table 95: Alarm Relay Contacts on the Craft Interface . . . . . . . . . . . . . . . . . . . . 423
Table 96: Connecting Alarm Relay Contacts . . . . . . . . . . . . . . . . . . . . . . . . . . . . 424
Table 97: Supported Three-Phase Delta AC Wire Gauge . . . . . . . . . . . . . . . . . . . 509
Table 98: Supported Three-Phase Delta AC Wire Gauge . . . . . . . . . . . . . . . . . . . 517
Table 99: Supported Three-Phase Wye AC Wire Gauge . . . . . . . . . . . . . . . . . . . 525
Troubleshooting Hardware
Troubleshooting Components . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 531
Table 100: MX2020 Cooling System Alarms . . . . . . . . . . . . . . . . . . . . . . . . . . . . 535
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