RAID Xanadu User Manual page 165

(5) Trouble in extended BBU
Condition
CHARGE LED (green)
does not illuminate
CHARGE LED (green)
blinks
BBU FAULT LED
(orange) is blinking
BBU FAULT LED
(orange) illuminates
CHARGE LED does not illuminate when the power of the extended
BBU is not turned on.
Confirm that the AC switch of the extended BBU is ON.
Check whether cable connection and power source are normal.
This indicates that AC power is being supplied to the extended BBU.
This is not a fault.
It is one year before the end of the life span of the extended BBU
connected to the disk array unit.
An extended BBU purchase and maintenance request must be made.
Contact your sales or maintenance service agent. (There is a charge
for battery exchange due to life span.)
The extended BBU may be out of order or may not connect to the
disk array unit, or the power of the disk array unit may not be turned
on. This LED turns on five minutes after the extended BBU detected
an abnormality.
Check the cable connection between the disk enclosure and the
disk array unit.
Confirm that the power of the disk array unit has been turned on.
Caution: When only the power of the extended BBU has been
turned on, it is assumed that connection has not been
established.
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