Cisco ONS 15454 Series Reference Manual page 49

ONS_15454_Reference_Manual_R8.5.x_--_Shelf_and_Backplane_Hardware
15454 Release 3.1 (15454-SA-NEBS3E, 15454-SA-NEBS3, and 15454-SA-R1, P/N: 800-07149).
Equipment damage can result from attempting to install the 15454-FTA3 in a noncompatible shelf assembly.
Note: 15454-CC-FTA is compatible with Software Release 2.2.2 and greater and shelf assemblies
15454-SA-HD and 15454-SA-ANSI.
Note: The 15454-FTA3 is not I-temp compliant. To obtain an I-temp tray, install the 15454-FTA3-T or
15454-CC-FTA fan-tray assembly in an ONS 15454 Release 3.1 shelf assembly (15454-SA-ANSI or
15454-SA-HD). However, do not install the ONS 15454 XC10G cross-connect cards with the 15454-FTA2
fan-tray assembly.
Fan Speed
Fan speed is controlled by TCC2/TCC2P 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 TCC2/TCC2P card
fails, the fans automatically shift to high speed. The temperature measured by the TCC/TCC2P2 sensors is
displayed 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. For fan tray
replacement instructions, refer to the Cisco ONS 15454 Troubleshooting Guide. The red Fan Fail LED clears
after you install a working fan tray.
Caution! As with the FTA3, the 15454-CC-FTA Fan Fail LED on the front of the fan-tray assembly
illuminates when one or more fans fail to indicate that a fan-tray assembly or AIP replacement is required.
But the Fan Fail LED on the 15454-CC-FTA will also illuminate when only one power source is connected
to the chassis, and or any fuse blows. In such conditions, the Fan Alarm is triggered and the fans run at
maximum speed.
Air Filter
The ONS 15454 contains a reusable air filter; Model 15454-FTF2, that is installed either beneath the fan-tray
assembly or in the optional external filter brackets. Earlier versions of the ONS 15454 used a disposable air
filter that is installed beneath the fan-tray assembly only. However, the reusable air filter is backward
compatible.
The reusable filter is made of a gray, open-cell, polyurethane foam that is specially coated to provide fire and
fungi resistance. All versions of the ONS 15454 can use the reusable air filter. Spare filters should be kept in
stock.
Caution! Do not operate an ONS 15454 without the mandatory fan-tray air filter.
Caution! Inspect the air filter every 30 days, and clean the filter every three to six months. Replace the air
filter every two to three years. Avoid cleaning the air filter with harsh cleaning agents or solvents. Refer to
the Cisco ONS 15454 Troubleshooting Guide for information about cleaning and maintaining the fan-tray air
filter.
Fan-Tray Assembly 49