Siemens SINAMICS S120 Device Manual page 308

Maintenance and servicing
6.4 Replacing components
Description
The average service life of the device fans is approximately 50,000 hours. In practice,
however, the service life depends on other variables (e.g., ambient temperature, cabinet
enclosure, etc.) and, therefore, may deviate from this value.
The fans must be replaced in good time to ensure the availability of the Cabinet Module.
Preparatory steps
● Disconnect the cabinet from the power supply (do not forget the external power supplies).
● Remove the protective cover.
● Allow unimpeded access.
Removal steps
The steps of the removal procedure correspond to the numbers shown in the previous figure.
1. Remove the retaining screws for the fan unit (3 screws).
2. Unplug connector -X630.
You can now carefully remove the fan.
NOTICE
Device damage due to signal cable damage during removal
Signal cables can become damaged when the fan is removed. This can cause the device to
fail.
• When removing the fan, ensure that you do not damage any signal cables.
Installation steps
Installation is performed the same as removal, but in the reverse order.
Note
Pay attention to the tightening torques
The tightening torques specified in the "Tightening torques for screw connections" table must
be observed.
308
Cabinet Modules NEMA
Manual, 04/2014, A5E03586450A