Rockwell Automation GV3000/SE AC Drive ControlNet Network Communication Board, M/N 2CN3000 - Manual (Page 47)

Installation 2-35
Unless otherwise indicated, keep all hardware that is removed. You will need it for
reassembly. This includes screws, lock washers, and rivets.
Important: Read and understand the warning labels on the outside of the drive
before proceeding.
Step 1. Shut Down the Drive
Step 1.1 Disconnect, lock out, and tag all incoming power to the drive.
Step 1.2 Wait five minutes for the DC bus capacitors to discharge.
Step 1.3 Disconnect all faceplate wiring.
Important: The cover is connected to the drive by the keypad/display cable. To
disconnect the cover, use the procedure below. Do not remove the
keypad/display.
Step 1.4 Remove the cover as follows:
a. Unscrew the attaching screw on the cover.
b. Lift the cover and carefuly take it out of the heatsink as far as the flat
ribbon keypad cable will allow. This cable connects the display with the
Regulator board.
c. Use a screwdriver to slide the cable out of the connector on the
Regulator board to competely detach the cover.
Step 1.5 24 to 43 A drives only: Remove the front panel by unscrewing the two
attaching screws.
Step 2. Verify that the DC Bus Capacitors are Discharged
Step 2.1 Use a voltmeter to verify that there is no voltage at the drive’s AC input
power terminals (R/L1, S/L2, T/L3). Refer to figure 2.16 or 2.19 for the
location of these terminals.
Step 2.2 Ensure that the DC bus capacitors are discharged. To check
DC bus potential:
a. Stand on a non-conductive surface and wear insulated gloves.
b. Use a voltmeter to measure the DC bus potential at the DC bus power
terminals ((–)45, (+) 47) shown in figure 2.16 or 2.19.
Step 2.3 24 to 43 A drives only: Reattach the front panel after checking the DC bus
potential.