Replacing Fans - Siemens SINAMICS G120 Hardware Installation Manual

6.3

Replacing fans

Service life of the fan
The average service life of the fan is 40,000 hours. In practice, however, the service life may
deviate from this value. Especially a dusty environment can block up the fan.
The fan must be replaced in good time to ensure that the converter is ready for operation.
Replacing fans on converters in frame size FSC
Proceed as follows to replace the fans:
1. Switch off the converter's supply voltage.
2. Wait for 5 minutes until the DC link capacitors have been discharged.
3. Remove the Control Unit from the converter.
4. Disconnect all of the cables from the Power Module.
5. Remove the Power Module.
6. Place the Power Module down on a level surface with the front side facing downwards.
7. Loosen the screws
8. Remove the fan from the device
9. Disconnect the fan plugs
10.Install the new fan in the inverse sequence.
You have replaced the fans.
Replacing fans on converters in frame sizes FSD and FSE
Proceed as follows to replace the fans:
PM250 Power Module
Hardware Installation Manual, 04/2021, A5E36265179B-AB
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Operation, repair, and maintenance
6.3 Replacing fans
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