Fujitsu SPARC M10-4, Service Manual

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Caution -
Active/cold maintenance can be performed only when the power supply unit has a
redundant configuration.
Note -
Make a note of the locations of the power cords before disconnecting them, to ensure
that they are reconnected correctly.
Note - Make a note of the locations of the power cords before disconnecting them, to ensure
that they are reconnected correctly.
has failed.
■
When replacing multiple PDUs, replace one unit at a time. If redundancy of the
PDUs cannot be preserved, then system-stopped maintenance must be performed.
29.3 Enabling the Removal of the
Dedicated Power Distribution Unit
This section describes the preparations that must be completed prior to removing a
PDU. The 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.
Disconnect all the power cords of the SPARC M10-4S and crossbar boxes
from the PDU requiring maintenance.
29.3.2 System-stopped maintenance
1.
Open the rack door.
2.
Stop the entire system.
For details, see " 5.4 Stopping the Entire System ."
3.
Disconnect all the power cords of the SPARC M10-4S and crossbar boxes
from the PDU requiring maintenance.
Chapter 29 Maintaining the Dedicated Power Distribution Unit Mounted on the Rack for Expanded Connection 449