Remove and Install the DC Precharge Module for Frames 8...15

Replace the DC precharge module with kit catalog number 20-750-MDCP1-CD-F8M (400/480V), 20-750-MDCP2-CD-F8M (400/480V with common mode core), 20-750-MDCP1-EF-F8M (600/690V), or 20-750-MDCP2-EF-F8M (600/690V with common mode core).
Before you can remove the DC precharge module from the enclosure, you must first remove the connected power module. Do not remove the power module until you are instructed to do so in this procedure.
The DC precharge module weights 41 kg (90 lb). Equipment is available that is designed to help you safely remove and handle the DC precharge module. The following equipment is recommended:
  • PowerFlex 750-Series module service cart, catalog number 20-750-MCART1
  • PowerFlex 755T DC precharge module lift, catalog number 20-750-MCART2 (must be used with the module service cart 20-750-MCART1)
For instructions on how to setup and use this equipment, see the PowerFlex 750-Series Service Cart and DC Precharge Module Lift Installation Instructions, publication 750-IN105.
Follow these steps to remove and install the DC precharge module from the enclosure.
  1. Review the product advisories in Before You Begin.
  2. Remove power from the system.
  3. Open the corresponding power bay door.
  4. Loosen the two M6 x 16 mm Torx screws that secure the side guards to the enclosure.
  5. Loosen the two M6 x 16 mm Torx screws that secure the bottom guard to the enclosure.
    example of how to remove the DC precharge module guards from the power bay
  6. If present, by pressing the release tab on the connector, disconnect connector P12 from J12 on the DC precharge module.
  7. By pressing the release tab on the connector, disconnect connector P13 from J13 on the DC precharge module.
    example of how to disconnect the DC precharge module P12 and P13 connectors
  8. IMPORTANT: Be sure to protect the loose wire harnesses from damage during DC precharge module removal. If possible, secure the loose harnesses to the side panels inside the enclosure.
  9. Loosen the thumb screw that secures the connections cover to the front of the power module.
  10. Use the screw to lift the connections cover up and off the power module chassis.
  11. Disconnect connector P3 from J3 on the power module I/O control panel.
  12. Disconnect connector P4 from J4 on the power module I/O control panel.
  13. IMPORTANT: The minimum inside bend radius for fiber-optic cable is 50 mm (2 in.). Any bends with a shorter inside radius can permanently damage the fiber-optic cable. Signal attenuation increases as inside bend radius is decreased.
    fiber-optic cable bend radius example
  14. Without bending the cable to a radius less than 50 mm (2 in.), remove the fiber-optic cable from the transceiver in the PDI port on the power layer interface circuit board.
    example of how to disconnect the DC prechage module P3 and P4 connectors from the power module
  15. Remove the fiber-optic cable from the power module chassis.
  16. IMPORTANT: Be sure to protect the loose wire harnesses and fiber-optic cable from damage during power module removal. If possible, secure the loose harnesses to the side panels inside the enclosure.
  17. Complete the removal of the power module from the enclosure.
  18. Remove the two M6 x 16 mm hex screws that secure the bottom of the DC precharge module to the control bus support.
  19. Remove the two M6 x 16 mm hex screws that secure the top of the DC precharge module to the enclosure roof support bracket.
    example of how to remove the screws that secure the DC precharge module to the support bracket
  20. To remove the module by using the service cart and DC precharge module lift, follow the detailed instructions in the PowerFlex 750-Series Service Cart and DCPC Module Lift Installation Instructions, publication 750-IN105.
  21. IMPORTANT: During module removal from the enclosure, be sure to protect the loose wire harnesses and fiber-optic cable from damage.
  22. Install the DC precharge module into the enclosure in the reverse order of removal.
  23. Remove the transceiver from the fiber-optic port on the power layer interface circuit board.
    TIP: If the latch is obstructed and you cannot use your fingers to open it, use a small, screwdriver or other long, narrow tool to open the latch.
    example of how to remove the fiber transceiver from a fiber-optic port
  24. Without bending the cable to a radius less than 50 mm (2 in.), fully insert the fiber-optic cable into the transceiver.
    example of how to insert a fiber-optic cable into a transceiver
  25. Insert the transceiver and fiber-optic cable into the port on the board, until you hear an audible ‘click.’
    example of how to insert a fiber-optic cable into a fiber-optic transceiver port
Provide Feedback
Have questions or feedback about this documentation? Please submit your feedback here.
Normal