Huawei SmartAX MA5600T Hardware Description page 118

SmartAX MA5600T/MA5603T/MA5608T Multi-service
Access Module
Hardware Description
NOTE
Table 2-20 Settings of SW2-7 and SW2-8
SW2-8
ON
ON
OFF
OFF
NOTE
Fan Speed Adjustment
Set the fan speed adjustment mode to "automatic" or "manual" in the command line interface
(CLI). After the fans are installed, they work in automatic mode by default.
NOTE
l
Issue 24 (2018-07-30)
Six fans are configured in the IEC fan tray (FCBC) of the MA5600T.
SW2-7
ON
OFF
ON
OFF
The IEC fan tray (FCBC) of the MA5600T must use speed adjustment policy 3.
The fan tray dissipates heat for the device to ensure that the device works at a normal temperature. When
the ambient temperature of the device exceeds its environment specifications, the system automatically
reports a high-temperature (or low-temperature) alarm.
Automatic mode
– Fan-control mode: The system automatically adjusts the fan speed according to the
board temperatures for energy saving.
– Control-board-control mode: Electric switches 7 and 8 of the SW2 DIP switch on
the monitoring board are set in four different ways to achieve four speed adjustment
policies (the IEC subrack supports only the third policy), as described in
2-21.
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Speed Adjustment Mode
Temperature measurement at
the air intake vent (reserved)
Temperature measurement at
the air exhaust vent
Temperature measurement at
the air intake vent
Temperature measurement at
the air intake vent (the fan stops
rotating)
2 Subrack and Chassis
Adjustment Strategy
Strategy 1
Strategy 2
Strategy 3
Strategy 4
Table
98