09.02  Maintenance 
Siemens AG    6SE7087-6AK85-1AA0 
8-3 
Rectifier/Regenerating Unit    Operating instructions 
 
Size H 
The fan is located in the fan box on the top of the unit. 
♦ Unplug X20. 
♦  Undo both M8 (SW 13) fixing screws. 
♦  Loosen the two M4 fixing screws and swing the plastic 
cover out sideways.. 
♦  Pull the fan box out of the unit forwards as far as the 
stop. 
♦  Then lift it up over the stop (at the back) and remove it 
completely from the unit. 
♦  Installation is carried out in reverse order. 
Important! 
The two M8 fixing screws are used to earth the fan 
box, so they must be screwed down firmly. 
 
X20
Fan E1
M8 M8
M4
 
Figure 8.3  Fan (AC 230V) for size H 
 
 
 
 
Size K 
The two fans are located in the fan box on the top of the 
unit. 
♦ Unplug X20. 
♦  Undo both M8 (SW 13) fixing screws. 
♦  Pull the fan box out of the unit forwards. 
♦  Installation is carried out in reverse order. 
 
X20
M8
Fan E1 Fan E2
 
Figure 8.4  Fan (AC 230V) for size K 
 
WARNING 
 
The fan box weighs approx. 16 kg for size H, and approx. 32 kg for size K. This must be 
taken into account when removing the fan box. 
Non-observance of warning notices can result in severe personal injury or considerable 
property damage. 
 
AoteWell Automation Sales Team
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