Rockwell Automation 7000L PowerFlex 7000 Medium Voltage AC Drive C Frame - Marine - Manual (Page 240)

4-64 Component Definition and Maintenance
7000L-UM302B-EN-P – June 2013 7000 ―C‖ Frame - Marine
Ensure the output of the supply is 56V DC.
There is a potentiometer on the top of the power supply that adjusts the
56 Volt DC output for the power supply. Isolate the output of the power
supplies; multiple supplies in series will affect your measurements.
With the control power on and the output of the AC/DC Converter
isolated from the drive control, adjust the potentiometer until the
output equals 56 volts DC. Perform this test on each power supply.
When all adjustments are complete, reconnect the power supply to the
circuit and re-measure the output. Readjust if necessary.
If it is not possible to maintain 56 V DC, the power supply may be
faulty.
Replacement Procedure
1. Ensure control power has been isolated and locked out.
2. Disconnect the terminals at the unit.
3. Remove the two M6 bolts per Figure 4.50.
4. Extract the power supply complete with bracket from the drive.
5. Remove the bracket from the failed power supply (four M4
screws and nylon shoulder washers).
6. Attach bracket to replacement power supply.
Note: Make sure the Black Insulation is between the AC/DC
power supply and the mounting plate.
7. Repeat Steps 5, 4, 3, 2 and 1 in this order to replace the unit (see
Figure 4.50).
8. Reapply control power and verify voltage levels.
Power Transformer
Hold-up Capacitors
Fuse Blocks
Power Supplies
(Optional)
AC/DC
Power Supply
Figure 4.50 – Replacement of AC/DC Power Supply on Low Voltage Panel
AC/DC Power Supply
(cont.)