Compaq StorageWorks UltraSCSI RAID Enclosure (DS-BA370 Series) User's Guide (EK-BA370-UG. C02, September 1998)

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 ON. The
LED remains ON until the overtemperature condition is corrected.
Power Status LED
This green power status LED (C
ALLOUT 4) turns ON 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.