HP Array Controller HSG V8.7 Software - Manual (Page 71)

Environmental Monitoring Unit
UltraSCSI RAID Enclosure 3–15
• Fault conditions—involves a subsystem configuration problem,
such as a Boot ROM checksum failure.
If a fault condition is detected, the system fault LED
(C
ALLOUT 1) starts F LASHING . For detailed information about
other system fault LED indications, see the Configuration Fault
Code Reporting section within this chapter.
Whenever the audible alarm sounds, check the EMU status LEDs to
determine the problem.
Caution
If the audible alarm sounds, but the status LEDs do not
indicate an error condition, it is possible that the error
condition no longer exists. However, always check the error
log on the optional maintenance terminal to verify that the
error no longer exists.
The master EMU reports the status of all enclosures, including error
conditions, to the array controller. The array controller records some
of this information in an error log and displays the log on the
controller console.
Alarm Control Switch
If a power, environment, blower error, or fault condition occurs, the
EMU turns O
N its audible alarm and the amber system fault LED.
The alarm remains on until one of the following occurs:
• The error condition is corrected.
• The user momentarily presses the alarm control switch.
Momentarily pressing the alarm control switch (C ALLOUT 2, Figure
3–5) turns O FF the audible alarm for all current fault conditions
within the enclosure. The alarm remains O FF until one of the
following conditions occur:
• A different fault occurs.
• An existing fault clears and reoccurs.