Rockwell Automation 20P PowerFlex DC Drive - Frame A Switching Power Supply Circuit Board - Manual (Page 8)

8 PowerFlex® DC Drive - Frame A Switching Power Supply Circuit Board
– For all other size drives, remove the two screws that secure the slotted
air flow plate to the top of the drive and remove the plate.
Important: Mark all connections and wires before removal to avoid
incorrect wiring during reassembly.
=
Air flow plate
Remove screw
Remove screw