General Functionality Si04-11530 Main Function1.10 Intelligent EyeOutline The function that detects existence of humans in the air-conditioned room and reduces thecapacity when no humans are available in the room in order to save electricity by means of ahuman motion sensor.Processing 1. Detection method by human motion sensor" This sensor detects human motion by receiving infrared rays and displays the pulse waveoutput." A micro computer in an indoor unit carries out a sampling every 20 msec. and if it detects 10cycles of the wave in one second in total (corresponding to 20msec.× 10 = 100msec.), itjudges human is in the room as the motion signal is ON.2. The motions (for example: in cooling)" When a micro computer doesn’t have a signal from the sensor in 20 minutes, it judges thatno body is in the room and turns off the human detection LED, operating the unit intemperature sifted 2°C from the set temperature. (Cooling : 2°C higher, Dry: 1°C higher andAuto : according to the operation mode at that time.)!1 In case of Fan mode, the fan speed reduces by 50 rpm." Since the set temperature is shifted by 2°C higher for 40 minutes, compressor speedbecomes low and can realize energy saving operation. But as thermostat is prone to be offby the fact that the set temperature has been shifted, the thermostat-off action is prohibitedin 40 minutes so as to prevent this phenomena.After this 40 minutes, the prohibition of the thermostat-off is cancelled and it can realize theIf the sensor detects the outputs 10 times/sec.or more, it judges humans are available.1secsampling (20msec)HighLowONOFFSensor output(Human motion)Human detectionsignal (R1915)ONOFF RESET.C/O Set temp. + 2˚CH/P Set temp. - 2˚CHuman detectionsignal20 min. 20 min.within 20minutes.40 min.MaxHzMi nHz0HzCompressorspeed The lower limit by detectinghuman.(Prohibition of thermostat-off)ONOFFONOFFHuman motiondetection LEDRemote controllerhuman motiondetection signalSensor buttonONOFFOperationOFFFan speed (H1)34HzSet speed - 50 rpmSet speed Set speedin case ofthermostat-offFrequency at set temp. + 2˚CSet temp.(R1916)
