Replacing A Power Module Without The Safety Function Being Enabled - Siemens SINAMICS G120 Operating Instructions Manual

Corrective maintenance

10.7 Replacing a Power Module without the safety function being enabled

10.7 Replacing a Power Module without the safety function being
enabled
Procedure
Proceed as follows to exchange a Power Module:
1. Switch off the supply voltage to the Power Module.
You do not have to switch off an external 24 V power supply for the Control Unit if one is
being used.
2. Remove the connecting cables of the Power Module.
3. Remove the Control Unit from the Power Module.
4. Replace the old Power Module with the new 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 being used, the 24 V supply of the Control Unit.
You have successfully replaced the Power Module.
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DANGER
Risk of electric shock from touching inverter connections
After the power supply has been switched off, it takes up to 5 min. until the capacitors in
the inverter have discharged so that the remaining voltage is non-hazardous.
Check the voltage at the inverter connections, before removing the connection cables.
NOTICE
Material damage when interchanging the motor connecting cables
The direction in which the motor rotates switches if you exchange the two phases of the
motor line.
Connect the three phases of the motor lines in the right order.
After exchanging the power module check the direction in which the motor rotates.
Converter with the CU250S-2 Control Unit (vector)
Operating Instructions, 06/2013, FW V4.6, A5E31759476B AB