Upkeep and maintenance 
  7.1 Changing the fan unit 
SCALANCE XR-500 
Operating Instructions, 05/2017, A5E03275845-11 
77 
4.  Disconnect the fan unit and the filter frame ④. 
 
Figure 7-2  Changing the fan of a SCALANCE XR552-12M SCALANCE XR528-6M is used 
analogously. 
5.  Push the new fan unit into the slot along the guide rails. 
6.  Push the filter frame into the slot along the guide rails. 
7.  Close the cover and lock it by pushing the catch from right to left with a slotted 
screwdriver. 
 
Note 
After turning on the basic device, the f
ans rotate at full speed for approximately 1 minute 
before the fan controller becomes active.