Rockwell Automation SA3000 High Power Modules - Manual (Page 49)

Diagnostics and Troubleshooting 4-17
4.4.2.1 Replacing an IGBT
If an IGBT needs to be replaced, it is recommended that the IGBT module be returned
to an authorized Rockwell repair facility.
4.4.3 Replacing the Pre-charge Assembly
Use the following procedure to replace the optional pre-charge assembly:
Step 1. Turn off and lock out DC input power.
Step 2. Wait ten minutes to allow the DC bus voltage to dissipate.
Figure 4.7 – IGBT Module Assembly Mounting Bolt Locations
5
4
1
2
3
PHASE V
PHASE W
!
ATTENTION: DC bus capacitors retain hazardous voltages after input
power has been disconnected. After disconnecting input power, wait ten
(10) minutes for the DC bus capacitors to discharge. Open the cabinet
doors and check the voltage across the DC bus bars, 347 A,B,C (+ bus)
and 345 A,B,C (- bus), with an external voltmeter to ensure the DC bus
capacitors are discharged before touching any internal components.
Failure to observe this precaution could result in severe bodily injury or
loss of life.