Rockwell Automation 7000 PowerFlex Medium Voltage AC Drive (B Frame) - Classic Control - Manual (Page 325)

Component Definition and Maintenance 6-35
7000 “B” Frame 7000-UM150I-EN-P – June 2013
2. Remove the load from the clamp head per the procedure on page
6-23 under „Checking Clamping Pressure‟.
3. Completely remove the SGCT or SCR from the heatsink that is
being replaced per the instructions on pages 6-24 to 6-27.
4. There are 2 bolts that secure the heatsink to the PowerCage.
They are 13-mm bolts, and should be removed using several
extenders to get the socket wrench out past all the sensitive gate
driver boards.
5. Loosen the two bolts and carefully remove the heatsink from the
PowerCage.
6. Install the new heatsink and hand-tighten the bolts.
7. Replace the SGCT or SCR per the instructions on pages 6-24 to
6-27.
8. Follow procedure “Uniform Clamping Pressure” to ensure the
heatsinks are clamped to a uniform pressure.