D3-DU 3xx/A, /BMaintenance
Project engineering manual V1.09
100
© KEBA 2021
Caution
Operation without fan, with reduced number of fans or other fan type is not
permitted since this could overheat the module and destroy it.
Before changing the fan the power supply must be disconnected!
WARNING!
If the DU 3xx/x is supplied by a D3-DP 3xx/x you have to wait up to 3 min-
utes after switching-off until no more dangerous residual voltage is at the
d.c. link. Only after verification of absence of voltage the supply rails may be
opened and the remaining covers can be opened.
Fan changing on top side of enclosure
To change the fan proceed as follows:
1) If necessary dismount the module.
2) Push the locking of the cover backwards (1) and open the cover (2).
Fig.10-39: Open the cover
3) Remove fan.
Fig.10-40: Remove fan
4) Unplug the fan.
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