Juniper PTX5000, Hardware Manual

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18. Verify that the PDU OK LED on the PDU faceplate is lit steadily, indicating that the PDU is
functioning normally.
Replacing a PTX5000 Three-Phase Wye AC PDU
IN THIS SECTION
Removing a PTX5000 Three-Phase Wye AC PDU | 366
Installing a PTX5000 Three-Phase Wye AC PDU | 373
Removing a PTX5000 Three-Phase Wye AC PDU
The PTX5000 has two redundant, load-sharing PDUs. Each PDU is hot-insertable and hot-removable.
The PDU weighs 51.2 lb (23.2 kg).
To remove a three-phase wye PDU:
1. Switch off the customer-site circuit breakers to the PDU being removed.
2. Move the circuit breaker and power OUTPUT switch located on the faceplate of the PDU to the off
(O) position.
3. Disconnect the AC power cord from the power source.
NOTE: After powering off a PDU, you must wait at least 60 seconds before turning it back
on.
4. Make sure that the voltage across the AC power cord is 0 V and that there is no chance that the AC
power cord might become active during the removal process. Verify that the 200-240 V/346-415 ~
30 A 50-60 Hz LED on the PDU faceplate is off.
5. Remove the power supply modules (PSMs) in the front of the chassis from the PDU to be removed
(see
Figure 15 ).
a. Loosen the captive screws on the door covering the PSMs and open the door.
b. Loosen the captive screw on the PSM ejector handle.
c. Grasp the ejector handle and pull to eject the PSM. Slide the PSM halfway out of the chassis.
Place one hand underneath the PSM to support it and slide it completely out of the chassis.
366