Siemens SINAMICS S120 Manual page 375

Description
The average service life of the device fans is 50,000 hours. In practice, however, the service
life depends on other variables (e.g. ambient temperature, degree of cabinet protection, etc.)
and, therefore, may deviate from this value.
The fans must be replaced in good time to ensure that the device is available.
Preparatory steps
● Disconnect the drive line-up from the power supply
● Allow unimpeded access
● Remove the protective cover
Removal
The removal steps are numbered in accordance with the numbers in the diagram.
1. Remove the retaining screws for the fan unit (3 screws).
2. Disconnect the supply cables (1 x "L", 1 x "N").
You can now carefully remove the fan.
NOTICE
Do not damage any signal cables
When removing the fan, ensure that the signal cables are not damaged.
Installation steps
Installing is the same as removing, however in the reverse order.
NOTICE
Pay attention to the tightening torques
The tightening torques specified in the table "Tightening torques for screw connections"
must be observed.
Chassis power units
Manual, (GH3), 01/2013, 6SL3097-4AE00-0BP3
Maintenance and Servicing
8.4 Replacing components
373