HP Array Controller HSG V8.7 Software - Manual (Page 62)

Environmental Monitoring Unit
3–6 UltraSCSI RAID Enclosure
Temperature Fault LED
If either the intake or exhaust air temperature exceeds user-defined
temperature setpoints, this amber LED (C
ALLOUT 3) turns O N . The
LED remains O N until the overtemperature condition is corrected.
Power Status LED
This green power status LED (C ALLOUT 4) turns O N if all the
following normal operating conditions exist:
• +5 V dc is greater than +4.7 V dc.
• +12 V dc is greater than +11.4 V dc.
• At least four power supplies are operational.
• TERMPOWER is present on all six I/O modules.
The power status LED turns O FF if any one of the following error
conditions exist:
• +5 V dc is less than +4.7 V dc.
• +12 V dc is less than +11.4 V dc.
• Fewer than four power supplies are operational.
• TERMPOWER is missing from one or more I/O modules.
Maintenance Terminal Connector
This connector (C ALLOUT 5) is used to connect the optional
maintenance terminal or a personal computer (PC) to the EMU for
displaying EMU:
• Error messages
• Information messages
This connector and a PC are also used to load microcode updates into
EMU memory.
Blower Fault LEDs
One or more of these eight amber blower fault LEDs (C ALLOUT 6)
turn O N if one of the following error conditions exist:
• One or more blowers are not operational.
• One or more blowers are not operating at the correct speed.
• A blower is removed.