ABB ACS1000 User Manual page 181

11 PREVENTIVE AND CORRECTIVE MAINTENANCE
Figure 11-15: Redundant fan unit – Unplugging the power supply cable
5. Remove the fixing bolts.
Note: If the bolt at the back (1 in Fig. 11-16) is not accessible from the back of the cabinet,
remove the cover (2 in Fig. 11-16), reach through the opening and unscrew the mounting
support (3 in Fig. 11-16) from below.
3BHS213401 E01 REV H ACS1000 AIR-COOLED USER MANUAL 179/184