What will occur if power modules or fan modules used on a CE switch have different airflow directions

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Description
What will occur if power modules or fan modules used on a switch have different airflow directions?
Solution
If power modules or fan modules used on a CE switch have different airflow directions, the system reports alarms about inconsistent airflow directions of the power modules and fan modules. Inconsistent airflow directions between power modules, fan modules, or between power modules and fan modules degrade system reliability when the switch needs to work in a high-temperature environment for a long time, and shorten service life of the switch.

Other related questions:
Will a CE switch generate alarms if it has only one fan module or power module installed
Description
Will a switch generate an alarm if it has only one power module or fan module installed?
Solution
If only one power module is installed in a switch, the switch generates power module absence alarms for the idle power slots.
In this case, the switch generates fan module absence alarms for idle fan slots, and fans in the present fan module work at full speed.
Description:
  • The CE5800 series supports 1+1 redundancy of power modules and fan modules. A CE5800 switch can work normally with a single power module or fan module installed, but the device reliability degrades in this case.
  • The CE6800 switches support 1+1 redundancy of power modules. A CE6800 chassis uses two FAN-EA series fan modules. Each fan module contains two fans. The four fans in the chassis work in 3+1 backup mode.

Why is the indicator of a fan module steady red or blinking red on CE switches
Possible Causes 1. The fan module is not installed properly in the fan slot. 2. Fan blades are blocked or stop rotating because of heavy dust. 3. The fan module is faulty. Troubleshooting Procedure 1. Pull out the fan module and reinstall it to ensure that it is securely installed in the slot. (Fan modules are hot swappable.) 2. Remove the fan module from the chassis and check whether the fan blades are blocked or whether there is too much dust on the fan blades. a. If fan blades are blocked by an obstacle, remove the obstacle. b. If the fan blades have heavy dust, use a brush to clean them. 3. If the problem persists, install another fan module of the same model into the fan slot. If the new fan module can work properly, the original fan module has failed and needs to be replaced.

What is the working mode of power modules on CE series switches
Description
What is the working mode of power modules on a switch?
Solution
By default, power modules on a switch work in load balancing mode. The software of power modules equally distributes power consumption to all the power modules.
You can change the working mode of power modules through the CLI if required.

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