Air Filter; Pfu - Huawei Eudemon8000E Series Manual

HUAWEI Eudemon8000E Firewall
Hardware Description
Fan Speed Adjustment
When the system is fully configured, temperatures reported by the temperature sensors on the
LPUs, SFUs, and MPUs serve as the basis for fan speed adjustment. General principles are listed
below:
When the ambient temperature is between -5°C and 27°C, fans rotate at a low speed (2200/min).
When the ambient temperature is above 50°C, fans rotate at a high speed (5900/min). When the
ambient temperature is between 27°C and 50°C, fan speed increases or decreases in tandem with
temperature movements.
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3.7.3 Air Filter

This section describes the appearance of the air filter.
The E8000E-X8 draws in air from the front top and exhausts air from the rear top. There is a 3
U space in the upper part of the chassis and an air filter on the front of the chassis. To maximize
air intake, the filter is fully perforated. The air filter is fixed to the chassis by a fastener to facilitate
filter removal and replacement.
Figure 3-12 An air filter

3.7.4 PFU

This section describes the appearance, functions, and specifications of the PFU.
The Power Filtering Unit (PFU) filters the power supply for the fan frame of the device. The
PFU performs functions such as reporting a signal that the PFU is in position, e-label reading
and writing, and indicators.
Appearance of the PFU
Figure 3-13
Issue 01 (2012-11-07)
When the ambient temperature is 27°C or below, fans rotate at a fixed low speed, which
meets the ETSI noise requirement and the heat dissipation requirement.
When the ambient temperature is between 27°C and 50°C, the speed of fans is adjusted
smoothly in linear mode, and there are slight changes in noise levels.
NOTE
Placing a black sponge air filter at the air intake vent helps to prevent dust from entering the system. It is
recommended that the air filter be removed and cleaned once every three months.
shows the appearance of the PFU.
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Figure 3-12 shows the appearance of an air filter.
3 E8000E-X8 Chassis Overview
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