Rockwell Automation Publication 20B-IN017B-EN-P - September 2011 51
Component Replacement Procedures Chapter 3
Converter Power Module
(SCR) - AC Input Only
Important: If any SCR module fails, all three SCR modules should be replaced.
(Kit includes all three modules.)
Refer to the figures in Component Diagrams and Torque Specs on page 13
for
these instructions.
Remove Components
1. Read and follow the Safety Precautions on page 9 and Important Initial
Steps on page 11.
2. Locate the Converter SCR modules (R, S, T) to be replaced.
3. Perform Remove Main Control Panel Assembly on page 21
.
4. Perform Remove Stacking Panel on page 22
.
5. Using the instructions in Converter Snubber Board - AC Input Only on
page 50, remove all three Converter Snubber Boards.
6. Label and note the position of the SCR module leads. Remove the leads.
7. Remove the two (2) M6 screws that hold the AC Bus Bar to SCR, one
(1) screw per SCR.
8. Remove the top nut at the input power terminal block.
9. Remove the three AC Bus Bars (R, S, T).
10. Remove the six Snubber Board Mounting Brackets (M6 T40 screws).
11. Remove the four (4) M6 screws from the DC Link Choke terminal (1)
and (4).
Converter SCR
Modules
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