EonStor DS S12/S16/S24 Series Hardware Manual
A single LED indicates the PSU status. When a power supply failure occurs, the
LED will light up
red
. An extraction handle at the rear of the PSU is designed to help
properly install or remove the module.
A screw hole on the extraction handle helps secure the PSU to the chassis. The
shipping package contains adjustable cable clamps that can be used to secure
power cord connections.
1.4.8
S12 and S16 RAID Series Cooling Module
The subsystem comes with two cooling modules embedded in the power
supply units (see the diagram in the previous section)
.
The cooling modules operate with three rotation speeds. Under normal operating
conditions, the cooling fans run at the low speed. Under the following conditions,
cooling fans raise their rotation speed to increase the airflow:
Component failure: if one cooling fan in a cooling module, a PSU, or a
temperature sensor fails, the remaining cooling fan(s) automatically raises its
rotation speed.
Elevated temperature: if the temperature breaches the upper threshold set for any
of the interior temperature sensors, the cooling fans automatically raise their
rotation speeds.
During the subsystem initialization stage, the cooling fans operate at the high
speed and return to low speed once the initialization process is completed and no
erroneous condition is detected.
NOTE
There are two upper temperature thresholds: one for event notification and the other
for triggering higher fan rotation speed. The preset value for event notification can be
changed using the firmware-embedded configuration utility, while the fan speed
trigger cannot. Refer to the Firmware Operation Manual for details.
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