Corrective maintenance
8.1 Replacing inverter components
Converter with the CU240B-2 and CU240E-2 Control Units
Operating Instructions, 01/2016, FW V4.7 SP6, A5E34259001B AC
389
Replacing a Power Module with enabled safety function
Danger from touching energized Power Module connections
After switching off the line voltage, it will take up to 5 minutes until the capacitors in the
Power Module are sufficiently discharged for the residual voltage to be safe. Death or
serious injury will result if energized parts are touched.
• Check the safe isolation of the Power Module connections before carrying out
installation work.
Material damage from swapping the motor's connection lines
The direction in which the motor rotates switches if you swap the two phases of the motor
line. A motor running backwards may damage the machine or installation.
• Connect the three phases of the motor lines in the right order.
• After replacing the Power Module, check the direction of motor rotation.
To replace the Power Module, proceed as follows:
1. Switch off the line voltage of the Power Module.
You can leave any external 24 V supply to the Control Unit switched on.
2. Remove the connecting cables of the Power module.
3. Remove the Control Unit from the Power Module.
4. Replace the Power Module.
5. Mount the Control Unit onto the new Power Module.
6. Connect up the new Power Module using the connecting cables.
7. Switch on the line supply and, if necessary, the 24 V supply for the Control Unit.
8. The inverter reports F01641.
9. Perform a reduced acceptance test.
Reduced acceptance after component replacement and firmware change
(Page 397)
You have successfully replaced the Power Module.
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