
Troubleshooting and Problem Solving
DataDirect Networks EF2800 FC RAID Storage System User Guide (V 1.0)
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10.2.3 Power Supply/Cooling Module
The Power Supply Cooling LEDs are shown in Figure 65. Under Normal
conditions the LEDs should all be illuminated constant green. If a
problem is detected the color of the relevant LED will change to amber.
10.3 Audible Alarm
The Ops Panel also includes an audible alarm which indicates when a
fault state is present. The following conditions will activate the audible
alarm:
•Drive Fault
•Fan Fault
• Voltage out of range
• Over temperature
• Thermal overrun
• System fault
10.3.1 Audible Alarm Mute
When the audible alarm sounds, it may be muted by pressing the Alarm
Mute push-button. Automatic muting will take place after two minutes
if the mute switch is not manually operated. The Alarm Mute push-
button is located above the indicators on the Ops Panel
(Figure 61).
When the alarm is muted it will continue to sound with short
intermittent beeps to indicate that a problem still exists. It will be
silenced when all problems are cleared.
10.3.2 LED Test Mode
The Alarm Mute push-button can also be used to test the LEDs on the
Ops Panel. When the Mute push-button is held, all LEDs will be
illuminated if there are no faults present.
Power AC Fan DC Output
PSU Good: Green
AC Input Fail: Amber
Fan Fault: Amber
DC Output Fail: Amber
Figure 65. PSU LEDs
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