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Installation and Troubleshooting 2 - 21
Fan Operation Verification
To verify that the fan unit and the power supply fan are functioning
correctly you need to visually inspect the fan unit(s) on the rear of the
concentrator to make sure they are turning and that nothing is blocking
their path.
Power Supply Operation Verification
Verify that the LEDs on the Controller Module appear as defined in
Table 2-3 to check the operation of the power supply.
Table 2-3. Controller Module LEDs After Proper Power-Up
LED Proper State
Primary Power On.
Backup Power On. A backup power supply is installed.
Off. No backup power supply is installed.
Temperature (TEMP) Off.