Siemens SINAMICS S120 Equipment Manual page 221

Replacing the fan for capacitor cooling of a 100 kW Basic Line Module
Before replacing the fan, you must switch off the power supplies (24 V DC and 400 V AC).
Risk of electric shock. Dangerous voltages are still present for up to 5 minutes after the
power supply has been switched off. The device cover must not be opened until this time
has elapsed.
NOTICE
When replacing the fan, you must observe the ESD regulations.
Parts must only be replaced by trained personnel (danger of damage to sensitive
components due to static electricity)!
Open the right device cover by loosening the six marked
screws
Pull the second fan cable
Booksize power units
Manual, (GH2), 06/2008, 6SL3097-2AC00-0BP6
DANGER
3.4 Basic Line Modules with internal air cooling
Pull the first fan cable by pressing it slightly
Unlatch the fan module
Line Modules Booksize
221