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MA5600T, MA5603T, and MA5608T Hardware Description 25

This manual describes the Huawei MA5600T, MA5603T, and MA5608T hardware specifications, such as dimensions, weight, power consumption, capacity, structure, chassis, slots, boards, power modules, and optical modules.
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Fan Tray

Fan Tray

A fan tray functions heat dissipation, monitoring, and fan speed adjustment, which ensures that the device works at a stable temperature.


Two fans are configured in the fan tray of the MA5608T.




Dimensions (W x D x H)




Power consumption (including FCBB board)

  • Static: 4 W
  • Maximum: 39 W


The functions of the fan tray are as follows:

  • Heat dissipation

    The fan tray is at the left of the service subrack and blows air for heat dissipation of the service subrack. The cool air flows to the subrack from the left of the subrack and then is exhausted from the right of the subrack after passing the boards.

  • Monitoring

    The fan tray is configured with a fan monitoring board. The fan monitoring board transmits speed adjustment signals to the fan tray, collects the rotating speed signals of the fans, and reports the rotating speed signals to the control board.

  • Speed adjustment

    The rotating speed of the fans can be adjusted according to the detected temperature automatically or be adjusted by software manually.






Operation Description




The fan tray functions properly.

No action is required.



The fan tray is abnormal.

  • A power alarm or temperature sensor alarm may be generated. Handle it based on the specific alarm
  • Adjust the fan speed because a high temperature alarm or low temperature alarm may be generated.
  • Check communication between the fan tray and device because communication between them may be interrupted.
  • Fans may be faulty. Replace the faulty fan tray.

Fan Speed Adjustment

Fans in the fan tray of the MA5608T chassis have the following modes:

  • Self-check mode: Fans start running at full speed when the device is powered on for the first time or is reset. After fans start up, the duty ratio of fans is initialized.
  • Troubleshooting mode: Fans run at the old speed and related alarms are reported when faults occur.
  • Board-based fan speed adjustment mode: According to the temperatures detected by temperature sensors on all boards, fans automatically adjust their speed.
  • Temperature mode: According to the temperature of the fans, fans automatically adjust their speed.

Figure 2-31 shows the status transfer of the fans after the fan tray starts up.

Figure 2-31  Fan status transfer

Updated: 2019-03-18

Document ID: EDOC1000060621

Views: 137397

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