Power supply/fan assembly LEDs
Each power supply/fan assembly has one LED.
The LED is illuminated when both the power supply and the fan are operational. When a power supply
or fan fault occurs, the LED goes off. If the LED is off, AC power is not present or there is a complete
power supply failure.
15583
The power-supply-mounted fans cool the chassis by circulating air through the enclosure. The rate at
which air moves (the air
fl
ow) determines the amount of cooling. This air
fl
ow is a function of fan speed
(rpm). These fans, under the control of the Environmental Monitoring Unit (EMU) or the associated power
supply, can operate at multiple speeds. This ensures that when the enclosure temperature changes, the
fans can automatically adjust the air
fl
ow. If one fan operates too slowly or completely shuts off, the
other fan operates at a higher speed. At the same time, the error condition is reported to the user
via the LCD panel on the front of the controller.
26
System components and LEDs
Summary of Contents for 201723-B21 - HP StorageWorks Modular SAN Array 1000 Hard Drive
Page 8: ...8 ...
Page 12: ...12 About this guide ...
Page 18: ...18 Specifications ...
Page 28: ...28 System components and LEDs ...
Page 58: ...58 LCD panel and message descriptions ...
Page 94: ...94 Customer replaceable components ...
Page 98: ...98 Capacity expansion and extension ...
Page 104: ...104 Hard drive failures and faulted LUNs ...
Page 110: ...110 SCSI hard drive firmware ...