Dell S5148F-ON EMC PowerSwitch Installation Guide July 2021 - Page 32

7 Fans The S5148F-ON switch comes from the factory with two PSUs and four fan modules installed in the switch. The fan modules and the power supplies, which have integrated fans, are hot-swappable. In addition to the power supply modules, you can order and install fan modules separately. The S5148F-ON switch supports two airflow direction options. Do not mix airflow types in a switch; you can use only a single airflow direction in a switch. If the airflow directions are mismatched, you must correct the mismatched airflow direction. ● Airflow is from the I/O panel to the PSU-the red indicator is the normal airflow direction. ● Airflow is from the PSU to the I/O panel-the blue indicator is the reverse airflow direction. All fans and PSUs in a configuration must be in the same airflow direction. Environmental factors can decrease the amount of time required between fan replacements. Check the environmental factors regularly. An increase in temperature and/or particulate matter in the air might affect performance-for example, new equipment installation). CAUTION: Check the fans at six-month intervals and replace them as necessary. Regularly monitor the speeds of the fans to accurately determine replacement intervals. Topics: • Components • Fan module installation Components The following are the S5148F-ON switch fan components: ● S5148F-ON switch fan module ● S5148F-ON switch fan module-reverse flow Figure 18. S5148F-ON switch fan modules ● 1-Fan modules Fan LEDs ● Solid green-Fan function is normal. ● Flashing yellow-There is a fan fault. ● Off-Fan is off. 32 Fans