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Fan Stops in Case SBS155622H Equipment Temperature is Lower Than 4

Publication Date:  2012-07-24 Views:  95 Downloads:  0

Issue Description

One day in December, 1999, maintenance personnel found that the fan of a specific SBS155/622H equipment was stopped and so were the fans of SBS155/622H equipment in many office points. Then he contacted the local office of Huawei Company urgently.

Alarm Information


Handling Process

After consulting the local office of Huawei Company, it was learnt that it is an advantage of SBS155/622H equipment. A temperature sensor is equipped in SBS155/622H equipment. When the environment temperature is lower than 4?the fan will stop automatically; when the temperature is higher than 4?the fan will start to run again automatically. Since it was in the winter, the temperature of the equipment room was lower than 4?

Root Cause

the symptom mentioned above appeared. Such a design can not only extend the service life of fan, but also reduce the dust accumulation.


A certain office employs SBS155/622H equipment for networking