Siemens Sinamics S120 Manual page 406

Maintenance and servicing
10.5 Forming the DC link capacitors
Forming circuit for Motor Modules
Figure 10-22 Forming circuit for Motor Modules
Procedure
● The unit being formed must not receive a power-on command (e.g. from the keyboard,
BOP20 or terminal block).
● Connect the appropriate forming circuit.
● During the forming process, the incandescent lamps must become less bright or go
completely dark. If the incandescent lamps continue to be brightly lit, a fault has occurred
in the drive unit or in the wiring.
406
Liquid-cooled chassis power units
Manual, (GH7), 11/2016, 6SL3097-4AM00-0BP7