Cisco ONS 15454 - Fan Speed; Fan Failure; NTP-G268 Install the Fan-Tray Assembly in the ONS 15454 M2 Shelf

The fan-tray assembly should be installed only after installing the power module. During the system startup
or fan-tray replacement, the inventory data of the fan-tray assembly and the power module is displayed in the
Inventory tab of CTC after a delay of approximately 6 minutes.
Note
After you install the fan-tray, you should only access it if a fan failure occurs. To clean and replace the fan-tray
assembly, see the “Maintain the Node” chapter in the Cisco ONS 15454 DWDM Configuration Guide.
If the fan-tray assembly is removed from the shelf, wait for at least 5 seconds before plugging it back into the
shelf. In the event the LCD display on the fan-tray assembly appears blank, remove the unit from the shelf,
wait for at least 5 seconds and reinsert the unit into the shelf.
Note
A back-up flash memory is fitted into the fan-tray assembly to support the database (DB) and image back-up
in the single mode operation of the ONS 15454 M2.
Fan Speed
Fan speed is controlled by the TNC, TNCE, TSC, TNCS-2, TNCS-2O, or TSCE card temperature sensors.
The sensors measure the input air temperature at the fan-tray assembly. Fan speed options are low, medium,
and high. If the TNC, TNCE, TSC, TNCS-2, TNCS-2O, or TSCE card fails, the fans automatically shift to
high speed. The temperature measured by the TNC, TNCE, TSC, TNCS-2, TNCS-2O, or TSCE sensors
appears on the LCD screen.
Fan Failure
If one or more fans fail on the fan-tray assembly, replace the entire assembly. You cannot replace individual
fans. The red Fan Fail LED on the front of the fan-tray illuminates when one or more fans fail. The red Fan
Fail LED clears after you install a working fan-tray.
NTP-G268 Install the Fan-Tray Assembly in the ONS 15454 M2 Shelf
This procedure installs the 15454-M2-FTA or 15454-M2-FTA2 fan-tray assembly
in the ONS 15454 M2 system.
Purpose
Small slot-head screwdriverTools/Equipment
• NTP-G266 Install the ONS 15454 M2 Shelf, on page 194.
• Connect the chassis to the office ground. For detailed instructions on how
to ground the chassis, see the Electrostatic Discharge and Grounding Guide
for Cisco CPT and Cisco ONS Platforms.
• NTP-G267 Install the Power Module in the ONS 15454 M2 Shelf, on page
230.
Prerequisite Procedures
RequiredRequired/As Needed
OnsiteOnsite/Remote
NoneSecurity Level
Cisco ONS 15454 Hardware Installation Guide
235
Installing the ONS 15454 M2 Shelf
Fan Speed