Chapter 5: System Maintenance
5-11
5.5. Replacing a Faulty PSU
5.5.1 Notes on PSU Module Maintenance
Redundant, load-sharing PSU modules
: The system comes with two
(2) fully redundant, hot-swappable PSU modules.
PSU canister
: Each PSU module is housed in a robust steel canister,
with the power supply converter unit in the front and two juxtaposed
cooling fans in the rear section. When the PSU is removed from the
chassis, the cooling module is also removed.
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 system will
overheat, possibly causing irreparable damage to some of the system
components.
WARNING!
Although the system can operate using a single PSU module, it is
not advisable to run the system with a single PSU module for an
extended period of time.
5.5.2
Replacing the PSU Module
To replace a PSU, please follow these steps:
Step 1.
Power off the PSU
. The power switch is located on each
PSU’s rear-facing panel.
Step 2.
Disconnect the power cord
that connects the PSU to the
power source.
Step 3.
Loosen the retention screw
that secures the extraction
handle to the chassis using a Phillips screwdriver. See below
drawing for its location.
