Manual

72 Rockwell Automation Publication 20B-IN024C-EN-P - June 2012
Chapter 3 Component Replacement Procedures
Precharge SCR Module and
Diode - DC Input Only
See Chapter 1 - Component Diagrams and Torque Specifications to locate the
component
detailed in these instructions.
Remove Components
1. Read and follow the Safety Precautions on page 12 and Important Initial
Steps on page 13.
2. Remove the stacking panel as detailed on page 26
.
3. Label and remove all precharge power cables and precharge wires from
both precharge busbars (DC+ IN and DC+ OUT.)
4. Remove both precharge busbars and carefully set aside.
5. For the Precharge SCR module, remove its connector wire.
6. Remove the SCR module and diode.
Install Components
1. Use isopropyl alcohol to thoroughly clean the mounting surface of the
heatsink and the mounting surface of the new SCR module and diode.
2. Use a 3- or 4-inch paint roller or putty knife to apply a thin, even coating of
the supplied thermal grease to the mounting surface of each SCR module
and diode.
Diode
SCR
Precharge Power Cables
Precharge Wires (two places)