9.1 Fan Tray Monitoring Principles
This topic describes the principles of monitoring the fan tray through the fan monitoring board.
shows the fan tray monitoring principles.
Figure 9-1
Fan tray monitoring principles
Fan monitoring board
Fan tray
Fan
Fan
Fan
Backplane
control system
NOTE
l
The fans connect to the fan monitoring board through the signal cable. The fan monitoring board
monitors the working status of the fans.
l
The fan tray is connected to the backplane of the shelf through cables directly or indirectly.
l
The fan monitoring board reports the collected status to the control system through the backplane.
9.2 LED
The LED on the front panel of the fan tray indicates the running status of the fans. This topic
describes the status and meanings of the LED.
The LED is on the right of the fan tray.
describes the LED of the fan tray.
Table 9-1
LED of the fan tray
LED
Status
Description
Green: on for 1s and off for 1s
repeatedly
The fan tray works in the normal state.
Green: on for 0.125s and off for
0.125s repeatedly
The fan tray is faulty.
UA5000 Universal Access Unit
Environment Monitoring
9 Fan Tray Monitoring Solution
Issue 01 (2012-08-17)
Huawei Proprietary and Confidential
Copyright © Huawei Technologies Co., Ltd.
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