Siemens SINAMICS S120 Manual page 332

Service and Maintenance
10.3 Service and maintenance for Chassis format components
Description
The average service life of the device fans is 50,000 hours. In practice, however, the service
life depends on other variables, including ambient temperature and the degree of cabinet
protection 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 front cover.
Removal
The steps for the removal procedure are numbered in accordance with the previous diagram.
1. Remove the retaining screws for the fan (3 screws).
2. Disconnect the supply cables (1 x "L", 1 x "N").
You can now carefully remove the fan.
CAUTION
When removing the fan, ensure that the cables are not damaged.
Installation
To re-install the fan, carry out the above steps in reverse order.
CAUTION
You must observe the specified tightening torques.
Carefully re-establish the plug connections and ensure that they are secure.
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Manual, (GH6), 07/2007 Edition, 6SL3097-2AL00-0BP2
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