Signaling after startup of the head After the battery is inserted, the head indicates that it is ready for operation byway of sound signals and a LED diode. There are two possible scenarios: a) a single beep - it means that an Auraton 200 TRA controller has been paired with the head. In such a case, the head only has to be installed on the radiator insert and the battery cover must be closed. After about 30 s, the head starts adjusting the temperature. b) three beeps - an Auraton 200 TRA controller has not been paired with the head. After the battery cover is closed, the head DOES NOT perform the temperature adjustment algorithm. If the head press pin is not in the fully opened position, the motor starts and the actuator moves away from the radiator.