Fan Speed Adjustment; Fan Module - Huawei NE40E Hardware Description

NE40E
Hardware Description
Figure 1-84 Diagram of air flows

1.9.4.2 Fan Speed Adjustment

When the system is configured to the largest capacity, the fan rotation speeds are adjusted
based on the temperatures reported by the sensors on the SRUs, Interface boards, and SFUs.
Ambient
Temperature
Below 27° C
(75.2° F)
27° C-40° C
(75.2° F-104° F)
Above 40° C
(104° F)

1.9.4.3 Fan Module

The fan module is located on the air exhaust vent. When a single fan fails, the heat dissipation
system enables the system to work for a short period of time at an ambient temperature of
40° C (104° F).
Issue 01 (2018-05-03)
Rotational Noise/Heat Control
Speed
Low When the ambient temperature is below 27° C (75.2° F),
rotation fans rotate at a fixed low speed, which meets the noise
speed requirement and the heat dissipation requirement.
(35%)
Linear When the ambient temperature is between 27° C
speed (75.2° F) and 40° C (104° F), the fan rotation speeds are
adjustment adjusted smoothly in linear mode, and the fan noise does
not change violently.
High When the ambient temperature is above 45° C (104° F),
rotation fans rotate at a fixed high speed, which meets heat
speed dissipation requirements.
(100%)
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