The statement is true. A "component runtime overdue" alarm is a preventive maintenance reminder indicating that a component has reached its predefined service life based on operating hours. After the technician performs the necessary maintenance, such as replacing a filter or humidifier canister, they must reset the component's runtime counter. This is done via the controller's interface, typically found under a menu path like "Maint > Performance Maintenance." Resetting the counter clears the alarm and restarts the timer for the next maintenance cycle.

B. If the counter is not cleared on the Performance Maintenance screen, the overdue alarm remains active even after maintenance.

1. Huawei NetCol5000-C In-row Chilled Water Smart Cooling Product User Manual. Section 6.3.2, "Performance Maintenance," describes the procedure for managing component lifecycles. It states, "After a component is replaced, clear its running time. Otherwise, the component overdue alarm will persist." The screen captures show the path to clear the running time for various components.