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Table 3. Active Controller LEDs
LED
LED State
Indicates
Temp
On
Temperature is normal.
Off
Temperature is normal, or the Temp LED is faulty.
Blinking
Temperature is higher than the allowable limit.
Fan (1 - 3)
On
Fan is present and operating.
Off
Fan is not installed or Fan LED is faulty.
Blinking
Fan unit is malfunctioning or not operational.
Power Supply (1-4)
On
Power supply present and OK.
Off
Power supply not installed, or Power Supply LED is
faulty.
Blinking
Power supply present, but faulty.
Fan Status Indicators
Fan status indicators (LEDs) on the active controller module will illuminate when a fan unit fails. The 8265
can temporarily run with two functioning fans.
Because the switch can run on just two fans, the warning provided by the FAN status LEDs allows you
adequate time to replace a faulty fan at your convenience.
Note: Operate the switch with all fans running.
Automatic 8265 Module Power-Down
The Intelligent Cooling Subsystem operates as follows:
1. The active controller module continually monitors the temperature sensor located behind each fan unit,
providing an accurate measurement of internal switch temperature.
2. An overheat condition may cause the active controller module to power down selected media modules.
This condition continues until the cause of the overheat condition is corrected and normal switch
internal operating temperature is restored.
The order in which media modules power down is determined by:
Individual module power class settings
Relative slot location of each installed module
For more information, refer to “8265 Module Power-Down Response” on page 111.
114
IBM 8265: User's Guide
Summary of Contents for 8265 Nways ATM Switch
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Page 17: ...Part 1 Configuring Your ATM Network Copyright IBM Corp 1994 1998 1...
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Page 107: ...Part 2 Managing the 8265 Copyright IBM Corp 1994 1998 91...
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