Rockwell Automation 20D PowerFlex 700H/S Frame 9 Main Fan and Isolation Transformer Assembly Replacement - Manual (Page 3)

PowerFlex® 700H/S Frame 9 Main Fan and Isolation Transformer Assembly Replacement 3
3. Disconnect the main fan motor lead wires including the ground wire.
4. Remove the four rubber bushings that cover the screws which mount
the fan assembly (see Figure 3 below).
5. Check that the upper mounting bolts securely hold the drive on the wall
of the system enclosure. Remove the lower mounting bolts from the
bottom of the frame (see
Figure 3 ).
Figure 3
6. Loosen, but do NOT remove, the four front screws (which are
accessible through the holes vacated by the rubber bushings) so that the
main fan assembly can easily slide off. To loosen, but not remove these
screws, turn them approximately 12 times.
7. Mark the existing isolation transformer wires so that you can identify
them later in this procedure. Reach into the drive and disconnect the
isolation transformer wires. Note: The existing transformer will be
disconnected and left in place.
8. Remove the two screws that mount the fuse holder/capacitor bracket to
the drive and remove the bracket.
9. Remove the three screws that hold the fan inverter board to the drive.
Disconnect the control wire X8 and X2 between the fan inverter board
and the fuse holder/capacitor bracket. Make sure that wires X8 and X2
do not fall inside the hole in the frame.
10. Remove the fan inverter circuit board from the drive.
Remove four
rubber bushings
and loosen four
screws
Remove two
mounting bolts