Siemens SINAMICS S120 Equipment Manual page 399

Replacing the fan
The fan is available as a spare part and has the article number: 6SL3064-1AC00-0AA0.
1. Disconnect the drive line-up from the power supply.
2. Remove the CU310-2 from the drive line-up
(see Chapter Mounting Control Units and Control Unit Adapters (Page 289).)
3. Release the snap hooks on the left and right sides of
fan by pressing them inwards.
5. Locate the centering frame of the replacement fan on
the mounting cam of the CU310-2.
7. Fit the CU310-2 to the drive line-up.
AC Drive
Manual, 06/2019, 6SL3097-5AL00-0BP1
12.2 Service and maintenance for components, Blocksize format
4. Remove the fan forwards out of the CU310-2's housing.
6. Slide the replacement fan onto the mounting cam in the
Control Unit.
Ensure that the fan connector fits into the centering frame
of the PC board.
Engage the two snap hooks at the fan in the Control Unit
housing.
Service and maintenance
397