User`s guide

RAID Array 3000 Pedestal Enclosure
3–4 EK–SMCPO–UG. A01
3.5 EMU Error Reporting
The primary function of the EMU is to detect and report conditions that can
cause the pedestal to malfunction and to report malfunctions. To accomplish this
the EMU constantly monitors the following pedestal signals:
•
+5 and +12 V dc
•
ac input
•
Power Supply present
•
Total power
•
Power OK (P_OK)
•
Power Disabled
•
Fan Speed (minimum and high speed)
•
Fan exhaust temperature
•
Shelf OK (S_OK)
The EMU can exchange signals with auxiliary devices and controllers.
3.5.1 EMU Error Conditions
The EMU reports error conditions and malfunctions using an audible alarm and a
LED. The user-enabled audible alarm and the amber fault LED on the front of
the pedestal are the only error indicators.
Whenever any of the following error conditions occur, the amber fault LED on
the front of the pedestal will turn on. When alarm switch S1 on the rear panel of
the pedestal is in the up (enabled) position, the audible alarm will sound when-
ever one of the following conditions occurs:
•
Loss of ac power to one of the power supplies
•
Failure of either power supply fan
•
UPS not connected
•
UPS power failure
•
UPS output too low
•
Temperature exceeds 50º C (123º F)
•
One of the +12 V dc outputs is less than + 9.85 V dc
•
One of the +5 V dc outputs is less than + 3.95 V dc
•
Miscellaneous error condition
•
A controller error condition exists
•
External Fault