Siemens SINAMICS S120 Equipment Manual page 96

Line Connection Booksize
2.9 Active Interface Modules internal air cooling
Replacing the fan in an Active Interface Module
NOTICE
When replacing the fan, you must observe the ESD regulations.
NOTICE
Parts must only be replaced by trained personnel (danger of damage to sensitive
components due to static electricity)!
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 fan cover must not be opened until this time has
elapsed.
96
DANGER
Manual, (GH2), 06/2008, 6SL3097-2AC00-0BP6
Booksize power units