4.2.3 Fan Module Functions
The heat dissipation system of the S9300 is divided into several zones and fan speed can be
dynamically adjusted.
CAUTION
S9300When a fan is faulty, a trap is reported. If all fans are faulty, shut down the device.
Each S9300 fan module serves a zone in the chassis and adopts the intelligent fan speed
adjustment technology. The fan module monitors the temperature of key components and
controls the temperature in each zone. If a sensitive component overheats, the fan speed
increases; when the temperature falls back to its normal range, the fan speed decreases. The fan
modules improve system reliability and reduce power consumption and noise.
Heat Dissipation Zones
The heat dissipation systems of S9306 and S9312 are divided into multiple zones. If there are
empty slots in a zone, the fans corresponding to this zone operate at a low speed, thus reducing
power consumption and noise.
As shown in Figure 4-5, the S9306 has two fan modules, serving two zones. Each zone contains
four boards.
Figure 4-5 S9306 heat dissipation zones
PWR1
PWR2
PWR3
PWR4
CMU1
CMU2
SLOT1-LPU
SLOT2-LPU
SLOT3-LPU
SLOT4-LPU
SLOT5-LPU
SLOT6-LPU
SLOT7-SRU
SLOT8-SRU
Heat dissipation zone 1
Heat dissipation zone 2
As shown in Figure 4-6, the S9312 has four fan modules, serving four zones. Each zone contains
four boards, in which the boards in slots 4 and 9 belong to two zones.
Quidway S9300 Terabit Routing Switch
Hardware Description 4 Heat Dissipation System
Issue 01 (2010-12-15) Huawei Proprietary and Confidential
Copyright © Huawei Technologies Co., Ltd.
4-5
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