How to change the fan direction

How to change the fan direction  

When the actual wind direction is inconsistent with the expected wind direction, an error will be reported and direct-fault will be displayed.

1. First use the display fan command to view the expected wind direction of the device ,

<Sysname> display fan

Airflow Direction: Port-to-power   // Actual wind direction

Prefer Airflow Direction: Port-to-power   // Expected wind direction

2. Modify the expected wind direction of the equipment to be consistent with the actual wind direction:

[Sysname] fan prefer-direction slot 1 port-to-power