Siemens SINAMICS S120 Combi User Manual page 274

Service and maintenance
14.3 Replacing the fan
Installing the internal fan
1. Before installing the fan, check the air flow direction
2. Installing the fan
3. Insert the connector (the connector must audibly click into place)
4. Close the fan cover.
5. Fix the Torx-slotted screw on the fan cover
6. Mount the front cover and tighten the screws at the front
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(arrows on the fan must match the diagram shown below)
Figure 14-1 Arrows on the fan for the air flow direction
The connecting cables must not be crushed!
SINAMICS S120 Combi
Manual, Edition 07/2012, 6SL3097-4AV00-0BP3