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Galaxy GHDX2-2430S/R-24F4D Installation and Hardware Reference Manual
System Monitoring
3-10
LED Status
OFF
The respective cooling fan is operating normally.
ON
The respective cooling fan has failed and the module must be
replaced.
Table 3-8: Cooling Fan Module LED Definitions
3.3. Audible Alarm
Different controller environmental and operational parameters (such as temperature, etc.)
have been assigned a range of values between which they can fluctuate. If either the
upper or lower thresholds are exceeded, an audible alarm will automatically be triggered.
The alarm will also be triggered when an active component of the subsystem fails. If the
subsystem manager is onsite and is alerted by the alarm, the manager needs to read the
error message on the LCD screen or on the PC terminal to determine what has triggered
the alarm and then take appropriate actions to rectify the problem.
WARNING!
Whenever an alarm is triggered, you must determine the cause of the problem. If
the audible alarm is ignored or not taken seriously and the problem is not rectified,
permanent damage to the system can result.
3.3.1 Default Threshold Values
Table 3-9 shows the default threshold values for the subsystem. If these values are
surpassed, the alarm will sound. The enclosure sensor default is set at a higher value than
the suggested ambient temperature threshold; however, it is crucial you maintain an
ambient temperature below 40ºC (and below 35ºC if BBUs are applied) at your
installation site.
Parameter Upper Threshold Lower Threshold
+3.3V +3.6V +2.9V
+5V +5.5V +4.5V
+12V +13.2V +10.8V
Enclosure Ambient 40ºC 0ºC