9.5 Maintenance
9.5.1 Replacing a fan
The fans must also be fitted with a monitor to ensure that the drive operates reliably. The
service life of the device fans is 30,000 hours. Replace the fan timely in order to maintain the
reliable functioning of the cabinet unit.
Note
If a DC bus is available, the fan must be removed from the back.
9.5.1.1 Replacing fans, from the front
Removing the fan
The five safety rules must be observed.
Image 9-2 Replacing fans from the front
1. Remove the front cover including fan flap from the fan box. To do this, loosen the fastening
screws ①.
2. Loosen the connector of the fan connector cable from the terminal in the fan box.
3. Loosen the fastening screws of fan ②.
4. Pull the fan out of the fan box.
Maintenance
9.5 Maintenance
SINAMICS SM120 6SL38855?B
Operating Instructions 12/2015 99
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