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3 - 2 ONline 17-Slot System Concentrator Installation and Operation Guide
Routine Maintenance
You should inspect your equipment to make sure that all of the following
are true:
❑ all the blank faceplates are on
❑ the fans are running
❑ there are no obstructions to the ventilation on the concentrator
❑ the ONline Controller Module and media module LEDs are registering
correctly
Replacing the Power Supply
Both the primary and backup power supplies in the ONline System
Concentrator are removed and installed in exactly the same manner. If a
power supply should fail and switch over automatically to the backup
power supply (optional) you can replace the failed power supply while the
unit is operating - without disrupting network operation.
Caution: Improper installation of the power supply could
damage the power supply.
Follow the steps below to replace a power supply unit:
1. Switch Off the failed power supply, then unplug the power cord from
both the wall and from the back of the power supply.
2. Remove and save the four screws that attach the power supply to the
rear of the concentrator as shown in Figure 3-1.