Rockwell Automation 20Y PowerFlex 700H, 700S, and 700AFE Drive Fan Systems, Frames 9...14 - Manual (Page 265)

Rockwell Automation Publication PFLEX-IN029B-EN-P - August 2014 265
PowerFlex 700H and 700S Diagnostic Procedures Appendix A
Checking the AC Fan Inverter
Capacitor To measure the main AC fan inverter capacitor, you must remove the fan inverter
assembly from the drive. Follow these steps to check the AC fan inverter
capacitor.
1. Remove the main AC fan inverter assembly from the drive. See Main AC
Fan Inverter Capacitor Removal and Installation in the corresponding
chapter for your drive frame size.
2. Disconnect the AC fan capacitor wire connectors marked Brown and Blue
from the AC fan inverter circuit board.
3. Measure the value of the capacitor.
4. If the value of the capacitor is less than 7
μF, replace the capacitor.
Isolating a Faulty Fan
Inverter Frame 9 PowerFlex 700H and 700S Drives
Since frame 9 drives only contain one fan system, there is nothing to isolate.
Frames 10 and 12 PowerFlex 700H and 700S Drives
The ASIC board controls both left and right-side fan inverters. The fan
connections include:
• X11 on the ASIC board to X8 on the left-side fan inverter board
• X3 on the left-side fan inverter to X8 on the right-side fan inverter
• X3 on the right-side fan inverter is terminated by a jumper
For more details, see:
• Frame 10 AC Fan System Wiring Schematic Diagram on page 57
• Frame 10 DC Fan System Wiring Schematic Diagram on page 58
• Frame 12 AC Fan System Wiring Schematic Diagram on page 119
• Frame 12 DC Fan System Wiring Schematic Diagram on page 120
Use the following procedure to isolate a faulty fan inverter board if the fans are
not running.
1. Review the General Precautions on page 17 .
2. Remove power from the drive. See Remove Power from the Drive on page
59 .
3. Move the control frame and remove the air flow plate and protective
covers from the drive. See Move the Control Frame and Remove the Air
Flow Plate and Protective Covers on page
60 .
IMPORTANT These procedures require special equipment and training. Only qualified and
trained personnel should perform these procedures.
ATTENTION: The sheet metal cover and mounting screws on the ASIC circuit
board located on the inverters of the power structure are energized at (-) DC bus
potential high voltage. Risk of electrical shock, injury, or death exists if someone
comes into contact with the assembly.