Fujitsu M10-4 Service Manual page 473

has failed.
When replacing multiple PDUs, replace one unit at a time. If redundancy of the
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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
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System-stopped maintenance
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29.3.1 Active/Cold maintenance
Caution - Active/cold maintenance can be performed only when the power supply unit has a
redundant configuration.
1.
Open the rack door.
2.
Disconnect all the power cords of the SPARC M10-4S and crossbar boxes
from the PDU requiring maintenance.
Note - Make a note of the locations of the power cords before disconnecting them, to ensure
that they are reconnected correctly.
29.3.2 System-stopped maintenance
1.
Open the rack door.
2.
Stop the entire system.
For details, see
3.
Disconnect all the power cords of the SPARC M10-4S and crossbar boxes
from the PDU requiring maintenance.
Note - Make a note of the locations of the power cords before disconnecting them, to ensure
that they are reconnected correctly.
Chapter 29 Maintaining the Dedicated Power Distribution Unit Mounted on the Rack for Expanded Connection
"5.4 Stopping the Entire System."
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