
Chapter 5: Subsystem Maintenance and Upgrading
Replacing a Failed PSU Module
5-9
Figure 5-4: Install the BBU Module
Step 3. Secure the BBU module to the enclosure. Tighten the two (2) spring
screws as shown above on the back of the BBU module.
Step 4. Once the new BBU module is correctly installed into the subsystem,
the LED should start flashing, indicates the BBU is being charged.
When the BBU is fully charged, the LED will go off.
5.5. Replacing a Failed PSU Module
5.5.1 Notes on PSU Module Maintenance
♦ Two redundant PSU modules: The subsystem comes with two fully redundant, hot-
swappable PSU modules. These modules are accessed from the rear of the
subsystem.
♦ Immediate replacement: When a PSU fails, it should ideally be replaced
immediately. Do not remove the PSU module unless a replacement is readily
available. Removing a PSU without a replacement will cause severe disruptions to
the internal airflow and the subsystem will overheat, possibly causing irreparable
damage to some of the subsystem components.
WARNING!
Although the subsystem can operate using single PSU module, it is not advisable
to run the Rorke Data subsystem with a single PSU module for an extended period
of time.
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