User Manual

64 Rockwell Automation Publication 20B-IN025B-EN-P - January 2011
Chapter 3 Component Replacement Procedures
Converter Snubber
Resistors - AC Input Only
See Chapter 1 - Drive Components to locate the component detailed in these
instructions.
Remove Components
Kit includes Snubber Board and Resistor.
1. Read and follow the Safety Precautions on page 8
and Important Initial
Steps on page 10.
2. Perform Remove Main Control Panel on page 22
.
3. Perform Remove Stacking Panel on page 25
.
4. Locate the Snubber Resistor(s) to be replaced.
5. Verify the Snubber Resistor(s) with a volt ohm meter. The reading should
be 8 ohms ± 10%.
• If the reading is not
within tolerance, perform the remainder of this
procedure.
• If the reading is within tolerance, do not perform the remainder of this
procedure.
6. For the R Snubber Resistor only: Perform Remove Transitional Busbar on
page 28.
7. Label and disconnect the wires from Snubber Resistor(s) that will be
replaced.
8. Remove the resistor(s) and properly discard.
Snubber Resistor for “R” SCR
Snubber Resistor for “S” SCR
Snubber
Resistor for
“T” SCR