Galaxy GHDX4 RAID iSCSI-SAS/SATA InstaHardware Reference Manual
52
Cooling Module LEDs and Cooling Fan Locations (3U S16E on top /
4U S24E at bottom)
LED
Color
Status
Cooling fan
LED off
When the LED is not lid, it indicates the cooling
fans are functioning properly.
Cooling fan
LED on
(
RED
)
When the LED lids up
RED
, it indicates a cooling
fan failure.
The subsystem has a novel approach to stabilizing the temperature
within the subsystem: When the intelligent sensors on the backplane
detect elevated temperature, such as high ambient temperature or
the failure of any cooling or PSU module, the system will turn the
cooling fans to high speed to extract more heat. Once the ambient
temperature cools down to normal or the failed modules have been
replaced, the cooling fans will return to low speed.
Audible Alarm
Different environmental and operational parameters (like
temperature, etc.) have been assigned a range of values between
which they can fluctuate. If either the upper or lower thresholds are
exceeded, an audible alarm will be triggered. The alarm will also be
triggered when a component fails. If the system administrator is
