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EonStor A08U/A12U-G2421 Installation and Hardware Reference Manual
enclosure’s rear panel. To firmly secure the PSUs into place,
reinsert the retention screw.
Step 9. Reconnect the power cord and turn the power on: Plug the power
cord into the socket on the PSU module and turn the PSU module
power switch on.
5.6 Replacing a Failed Cooling Fan Module
5.6.1 Notes on Cooling Fan Module Maintenance
• Redundant cooling fan modules: The subsystems are equipped with two (2,
EonStor A08U-G2421) or three (3, EonStor A12U-G2421) redundant, hot-
swappable, single-blower cooling fan modules located in the lower PSU module
slot. These cooling fan modules control the internal operational temperature of
the subsystem and therefore their working integrity should be maintained at all
times.
• Detecting a failed cooling fan module: If a cooling fan module fails, you can be
notified of the failure by the LED located at the back of the module, an audible
alarm, the terminal event prompts, the RAIDWatch Panel View, or through the
various methods by the Configuration Client utility.
• Replacing a cooling fan module: Once you are notified that a cooling fan
module has failed, it should be replaced as soon as possible. A failed cooling fan
module should only be removed from the subsystem when you have an
immediately available replacement module that can be installed as soon as the
failed cooling fan module has been removed.
WARNING!
• The latches at the back of the cooling fan module secure the cooling fan
module into the enclosure. If these latches are broken, the warranty on the
cooling fan module will be void.
• Although the cooling fan modules are fully redundant, it is not advisable to
run the EonStor subsystems with any of the cooling fan modules missing.
Whenever a cooling fan module fails, the system is at risk of sustaining
irreparable damage.
• Keep a failed module in its enclosure bay until a replacement unit is in hand.
5.6.2 Replacing a Cooling Fan Module
The cooling fan modules are secured to the chassis with two black latches located on
the rear of the module. To replace the cooling fan module, please follow these steps:
5-12
Replacing a Failed Cooling Fan Module