Fujitsu SPARC M10-4 Service Manual page 245

Power on the physical partition requiring maintenance.
Close the rack door.
11.6.3 Inactive/Cold maintenance
Note -
Connect all the power cords to the PSU backplane unit of the chassis
requiring maintenance.
Note -
Return to the operation of the XSCF firmware replacefru command to confirm
that the chassis has been incorporated into the system.
Power on the physical partition requiring maintenance.
Close the rack door.
11.6.4 System-stopped maintenance
Connect all the power cords to the PSU backplane unit.
Note -
Return to the operation of the XSCF firmware replacefru command to confirm
that the chassis has been incorporated into the system.
Start the entire system.
Chapter 11 Maintaining the Fan Units 221