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Chapter 5: Subsystem Maintenance and Upgrading
5.5. Replacing a Failed PSU Module
5.5.1 Notes on PSU Module Maintenance
Two (1+1) redundant PSU modules: The subsystem comes with two fully
redundant, hot-swappable PSU modules. These modules are located at the rear
section of the subsystem.
PSU canister: Each PSU module is housed in a robust steel canister, with the
power supply converter unit in the front and two serial-aligned cooling fans in
the rear section. When the PSU is removed from the chassis, the cooling module
is also removed.
Printed text on PSU handle: Before you insert a new PSU, make sure that the
printed text on the PSU handle matches the printed text on a partner PSU.
Double-check to avoid using a PSU of a different EonStor series.
Figure 5-8: Printed Text on PSU Handle
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 a single PSU module, it is not advisable
to run the EonStor subsystem with a single PSU module for an extended period of
time.
Replacing a Failed PSU Module 5-13