Function
The functions of the fan tray are as follows:
l Heat dissipation
The fan tray is at the top of the service subrack and exhausts hot air for heat dissipation.
The cool air flows to the subrack from the bottom of the subrack and then is exhausted
from the top of the subrack after passing the boards.
l Monitoring
The fan tray is configured with the fan monitoring board to detect whether the fans are
working in the normal state. The fan monitoring board also provides the port for
communication with the control board. The detected information is transmitted to the
control board through the fan monitoring board periodically.
l Speed adjustment
The rotating speed of the fans can be adjusted according to the detected temperature
automatically or be adjusted by setting the related data manually.
LED
Indicato
r
Color Status Meaning Operation Description
STATUS Yellow Blinking
quickly (on
for 0.125 s
and off for
0.125 s
repeatedly)
The fan tray
is not
registered
or is being
loaded.
No action is required.
The
communica
tion
between the
host and the
fan tray is
interrupted.
Check communication between the
fan tray and device.
Green Blinking The fan tray
works in
the normal
state.
No action is required.
Yellow Blinking
slowly (on
for 1 s and
off for 1 s
repeatedly)
The fan tray
generates
alarms that
do not
affect
services.
Handle it based on the
corresponding alarm.
SmartAX MA5600T/MA5603T/MA5608T Multi-service
Access Module
Hardware Description
2 Subrack and Chassis
Issue 24 (2018-07-30) Huawei Proprietary and Confidential
Copyright © Huawei Technologies Co., Ltd.
81
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