9.4.15.2 Replacing Auxiliary Fan Units - ABB ACS6080 User Manual

9.4.15.2 Replacing auxiliary fan units

1. Switch off the miniature circuit breaker of the fan unit that you want
to replace.
Note: To identify the miniature circuit breaker, see "Appendix D –
Wiring diagrams".
2. (Only for fan units of the optional REB) Unscrew the ventilation grid
(circles) and flip the grid downward (arrow).
IMPORTANT! The ventilation grid is hinged. You DO NOT need to
remove it.
3. Disconnect the wires (1) and unscrew (2) the fan units.
4. Remove the fan unit.
5. Reinstall the new one in reverse order of removal.
3BHS842007 E01 REV C
Figure 9-24 Accessing the fan units in the WCU roof box
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