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Appendix - Fault Isolation
Green
Green
Red
On
On
Off
DC output power good.
AC input power good.
Green
Green
Red
Off
On
On
AC input power good.
DC output power fault.
Green
Green
Red
Off
Off
On
Unit faulty and needs service.
Green
Green
Red
Off
Off
Off
Power is off.
A.2.2 Disk Shelf LEDs
A.2.2.1 Disk Power Supply LEDs
A.2.2.3 SE/LVD Terminator Module
This unit is located above the three fan modules on the right of each of the two disk shelves (rear). Since the terminator
should always be in SE mode:
The green LED over "SE" on the right should be on
The green LED over "LVD" (Low Voltage Differential) should not be on.
A.2.2.4 SES Unit Module
This unit is located above the three fan modules at the top middle of each of the two disk shelves. There is a LED above
the word "Temp", this LED is not used and should not be on. Next to "Temp" there is a "Mute" knob, this also is not
used and shouldn't be touched.
A.2.2.5 SE-SE I/O Repeater Module
This unit should be located above the three fan modules at the top left of each of the two disk shelves (rear). There are
no LEDs to be concerned with in the SE-SE I/O Repeater Module.
A.2.2.6 Fan Units (3)
Three fan units are located on the bottom part of each of the disk shelves (rear).