Fan Speed And Power Requirements; Fan Failure - Cisco ONS 15454 Reference Manual

1.14 1.14.1 Fan Speed and Power Requirements

The front of the fan-tray assembly has an LCD screen that provides slot- and port-level information for
all ONS 15454 card slots, including the number of Critical, Major, and Minor alarms. For optical cards,
you can use the LCD to determine if a port is in working or protect mode and is active or standby. The
LCD also tells you whether the software load is SONET or SDH and the software version number.
The 15454-SA-ANSI or 15454-SA-HD shelf assembly and 15454-FTA3 fan-tray assembly are required
Note
with any ONS 15454 that has XC10G or XC-VXC-10G cards.
The 15454-FTA3-T fan-tray assembly can only be installed in ONS 15454 Release 3.1 and later shelf
Caution
assemblies (15454-SA-ANSI, P/N: 800-19857; 15454-SA-HD, P/N: 800-24848). The fan-tray assembly
has a pin that prevents it from being installed in ONS 15454 shelf assemblies released before ONS 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.
The 15454-FTA3 is not I-temp compliant. To obtain an I-temp fan tray, install the 15454-FTA3-T
Note
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.
1.14.1 Fan Speed and Power Requirements
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.
Table 1-27
Table 1-27
Fan Tray Assembly
FTA2
FTA3 -T

1.14.2 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.
Cisco ONS 15454 Reference Manual, R7.0.1
1-62
lists power requirements for the fan-tray assembly.
Fan Tray Assembly Power Requirements
Chapter 1
Watts Amps
53 1.21
86.4 1.8
Shelf and Backplane Hardware
BTU/Hr
198
295
OL-9217-01