HP Array Controller HSG V8.7 Software - Manual (Page 61)

Environmental Monitoring Unit
UltraSCSI RAID Enclosure 3–5
EMU Front Panel
The EMU user interface controls, connectors, and LED displays are
on the front panel (see Figure 3–3). The following sections describe
the function of each component.
Figure 3–3 EMU Major Component Locations
EMU Communications Connectors
These connectors (C ALLOUTS 1 and 7) provide for EMU–EMU
communications between the master EMU and expansion EMUs.
System Fault LED and Alarm Control Switch
The amber system fault LED is part of the alarm control switch
(C
ALLOUT 2). This LED turns O N if an error condition is detected.
The system fault LED starts F LASHING if the EMU has one or more
fault codes to display.
If the system fault LED is F LASHING , momentarily pressing the EMU
alarm control switch turns the audible alarm O FF and initiates a fault
code LED display.
Pressing the alarm control switch for at least 5 seconds clears all
stored active fault codes. New fault detection and display continues.
If the enclosure is in standby power mode, momentarily pressing the
alarm control switch restores dc power to the enclosure.
Figure C ALLOUTS
1. EMU communications connector
(labeled IIC)
2. System fault LED (amber) and alarm
control switch
3. Temperature fault LED (amber)
4. Power status LED (green)
5. Maintenance terminal connector
6. Blower fault LEDs (amber)
7. EMU communications connector
(labeled IIC)
CXO5774A
1
2
3
4
5
6
7