Caution- Act ive/cold maintenance can be performed only when the power supply unit has a
redundantc onfiguration.
Note- Ma ke a note of the locations of the power cords before disconnecting them, to ensure
thatthey are reconnectedcorrectl y.
Note- Ma ke a note of the locations of the power cords before disconnecting them, to ensure
thatthey are reconnectedcorrectl y.
has failed.
■When replacing multiple PDUs, replace one unit at a time. If redundancy of the
PDUscannot be preserved, then system-stopped maintenance must be performed.
29.3 Enabling the Removal of theDedicated Power Distribution Unit
Thissection describes the preparations that must be completed prior to removing a
PDU.T he preparation procedure differs depending on the maintenance type as follows:
■Active/Cold maintenance
■System-stopped maintenance

29.3.1 Active/Cold maintenance

1. Open the rack door.
2. Disconnectall the power cords of the SPARC M10-4S and crossbar boxes
fromthe PDU requiring maintenance.

29.3.2 System-stopped maintenance

1. Open the rack door.
2. Stopthe entire system.
For details, see "5.4 Stopping the Entire System."
3. Disconnectall the power cords of the SPARC M10-4S and crossbar boxes
fromthe PDU requiring maintenance.
FujitsuM10-4/Fujitsu M10-4S/SPARC M10-4/SPARC M10-4S Service Manual ･December 2013456