User`s guide

These LEDs operate as described in the following table:
APC Unit LEDs
Each APC unit has two LEDs that indicate status.
These LEDs operate as described in the following table:
When an APC unit fails, the enclosure LED on the front of the unit also indicates the
failure.
LED Condition Indication
1 N/A Not used.
2 Solid green Drive present and OK.
Solid amber Drive failed.
Off Drive not present
3 Solid green Drive present and idle.
Green random flash I/O activity on disk drive.
Off Drive not present.
Power
Fault
LED Condition Indication
Power Off Enclosure not powered on.
Green (solid) APC unit functioning normally.
Fault Off APC unit functioning normally.
Yellow (flash) APC unit failure predicted.
Yellow (solid) APC unit failed.