Rockwell Automation 7000 PowerFlex Medium Voltage AC Drive (B Frame) - Classic Control - Manual (Page 347)

Component Definition and Maintenance 6-57
7000 “B” Frame 7000-UM150I-EN-P – June 2013
Fan Removal and
Replacement
The fan consists of a motor and impeller assembly. To replace the
fan it is necessary to remove the fan exhaust hood and top plate of its
cabinet.
Safety notes
Fan replacement requires working at a significant height from the
floor. Care should be taken to make a suitable platform from which
to work.
The fan motor is heavy and will require suitable lifting provision.
Ensure that fan power is locked out during fan maintenance.
Remove the eight nuts that secure the motor frame to the sidesheets
of the cabinet. Disconnect the power leads to the motor. Note the
terminal locations so that proper fan rotation is maintained.
To extract the fan, lifting hooks are placed in the holes of the motor
mounting brackets and the assembly is withdrawn vertically from the
cabinet. Do not support the assembly on the impeller or damage may
result.
Fan motor
Fan impeller
Mounting holes
Inlet ring
Mounting bracket
Figure 6.43 – Fan removal