Hitachi AMS 2000 Series Service Manual page 81

The battery expansion units contain the same batteries and have the same
storage capacity as the internal batteries, but are housed in a rackmount
unit that also contains a power supply to keep the battery charged. The
power supply runs on 110 VAC and is plugged into the rack PDB. The front
panel on the battery expansion unit contains an Alarm LED and a Ready
LED. See
expansion unit LEDs.
Figure 1-41: Battery Expansion Unit LEDs and Connectors
Table 1-30: Battery Expansion Unit LEDs and Connectors
Item Description
ON - Lights when the battery charging or protection circuitry has failed or
when the battery voltage is abnormal.
Alarm LED
1
red
OFF - During normal operation and when the unit is turned off. Also during
backup.
This LED indicates the condition of the battery.
ON
• Charge is completed.
• Supplementation charge.
Ready LED
2
• Low-speed blinking (1 second blink every two seconds): The battery is not
green
• High-speed blinking (2 blinks per second): Abnormal status
OFF - When the unit is turned off or the battery voltage is abnormal. Also when
the status of the battery is abnormal. (See Alarm LED)
ON - Lights when the port is connected and operating normally (can be during
backup)
3
Port 1 LED
OFF
4
Port 2 LED • When the port is not operating (for example, after sequential shutdown)
• When the connector is not working correctly (not connected, etc.)
green
• During backup.
Power Connects the power cable to the backup battery charger. The unit is on when
5
Receptacle the power cable is connected to the PDU.
Power Cable When locked onto the power cable, prevents the power cable from being
6
Retainer accidentally unplugged from the power receptacle.
Connect the battery cable from this port to the battery expansion unit
7
Port 0
connector on control unit #0.
Connect the battery cable from this port to the battery expansion unit
8
Port 1
connector on control unit #1.
Figure 1-41 and Table 1-30
fully charged, and is charging.
Introduction
Hitachi AMS 2000 Family Storage System Service Guide
for information about the battery
Status
1–41