HTAX is an amperometric control that allows you to set a minimum absorption threshold for single-phase fans below which the alarm is triggered. In this way, the shutdown of the ventilation system is promptly signaled.
In the case of systems in which the fan at minimum speed activates the ON-OFF timer mode (fans works in ON-OFF mode by timer) you can (via the Delay trimmer) t enter an alarm delay time, which must necessarily be greater than the Off time of the ventilation during the timing phase (in order to avoid the intervention of the alarm during the OFF time of ventilation system).
