Siemens SINAMICS S120 Equipment Manual page 290

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, degree of
cabinet protection, 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
● Observe the "five safety rules".
● Remove the protective cover.
● Allow unimpeded access.
Removal steps
The removal steps are numbered in accordance with the figure above.
1. Remove the retaining screws for the fan unit (3 screws).
2. Unplug connector -X630.
You can now carefully remove the fan.
CAUTION
When removing the fan, ensure that you do not damage any signal cables.
NOTICE
Take care not to cut yourself on the sharp edges inside the cabinet.
Installation steps
For installation, carry out the above steps in reverse order.
CAUTION
The tightening torques specified in the table "Tightening torques for connecting current-
conducting parts" must be observed.
Carefully establish the plug connections and ensure that they are secure.
The screwed connections for the protective covers must only be tightened by hand.
290
S120 Cabinet Modules Equipment Manual
Manual, (GH5), 10/2008, A5E00427098A