Rockwell Automation 6012DB PowerFlex Medium Voltage Variable Frequency Drive - Manual (Page 108)

108 Rockwell Automation Publication 6000-UM001B-EN-P - October 2014
Chapter 5 Preventative Maintenance and Component Replacement
Inspect PLC
1. Verify all input and output terminal connections are secure.
2. Verify all LEDs are working and indicate normal status.
See publication 2080-UM002_-EN-P for further information for the PLC, or
publication 2080-WD002_-EN-P for further information regarding the Isolated
Serial Port Plug-in Modules.
Inspect/Replace Control Unit or Control Boards
• Verify that the terminal connections on the bottom of the Control Unit
are secure and are free of dirt, dust, or foreign material. Clean with an anti-
static cloth.
• Verify the fiber optic cables are properly connected to the A/B/C PWM
boards. Verify an appropriate bend radius (if applicable).
• Check all boards for damage and properly working LEDs.
Replace a Control Unit
1. Turn off all the control power, turn off the UPS, and confirm the LV
Control Cabinet is unenergized before operation.
2. Disconnect all of the bottom terminals.
3. Disconnect the fiber optic wires from A/B/C Phase board.
4. Disconnect the HMI communication cable from the CPU board.
5. Remove four M6 x 12 bolts, and remove the Control Unit.
ATTENTION: Always perform Power Lockout procedure before servicing
equipment. Verify with a hot stick or appropriate voltage measuring device that
all circuits are voltage free. Failure to do so may result in severe burns, injury, or
death.
IMPORTANT The Control Unit does not have to be removed to replace Control Boards.
ATTENTION: When removing the fiber optic cables, be careful to prevent the
cables from straining or crimping as a resulting loss in light transmission will
impact performance.