Rockwell Automation 7000 PowerFlex Medium Voltage AC Drive (B Frame) - ForGe Control (PanelView 550) - Manual (Page 94)

94 Rockwell Automation Publication 7000-UM151E-EN-P - January 2013
Chapter 3 Component Definition and Maintenance
Install the replacement DC link in the reverse order of its removal.
You must connect the flexible DC link leads to the appropriate terminal and
route them to maintain electrical clearances. You must also verify that the
nameplate ratings are the same or appropriate for the drive system. A different
DC link will require different parameter settings.
The DC link maintains a ripple-free current between the line converter and the
machine converter. Thermal protection of the DC link reactor is provided by two
normally closed contacts wired to the I/O module. These contacts will open at
190°C and cause a fault/alarm message to be displayed.
Removing and Replacing Fans
The fan consists of a motor and impeller assembly. To replace the fan, remove the
fan exhaust hood and cabinet top plate.
Safety Notes
• Fan replacement requires working at a significant height from the floor. Be
careful to work from a safe, stable platform.
• The fan motor is heavy and requires suitable lifting provision.
• Lock out the fan power during fan maintenance.
Remove the eight nuts that secure the motor frame to the side sheets of the
cabinet. Disconnect the power leads to the motor. Note the terminal locations so
that proper fan rotation is maintained.
To extract the fan, use lifting hooks in the holes on the motor mounting brackets
and draw the assembly vertically from the cabinet. Do not support the assembly
on the impeller or you may damage the unit.