SiENBE12-713 Main Functions
Function and Control 71
1.10 INTELLIGENT EYE (Wall Mounted Type Only)
This is the function that detects existence of humans in the room by a human motion sensor
(INTELLIGENT EYE) and reduces the capacity when there is no human in the room in order to
save electricity.
Processing 1. Detection method by Intelligent Eye
" This sensor detects human motion by receiving infrared rays and displays the pulse wave
output.
" A microcomputer in an indoor unit carries out a sampling every 20 msec. and if it detects 10
cycles of the wave in one second in total (corresponding to 20msec.× 10 = 100msec.), it
judges human is in the room as the motion signal is ON.
2. The motions (for example: in cooling)
" When a microcomputer doesn’t have a signal from the sensor in 20 minutes, it judges that
nobody is in the room and operates the unit in temperature shifted 2°C from the set
temperature. (Cooling : 2°C higher, Dry: 1°C higher and Auto : according to the operation
mode at that time.)
H1 In case of Fan mode, the fan speed reduces by 50 rpm.
1sec
sampling (20msec)
High
Low
ON
OFF
Sensor output
(Human motion)
(R2821)
Human detection
signal
If the sensor detects the outputs 10 times/sec.
or more, it judges humans exist.
ON
OFF
RESET.
(R2822)
within 20
minutes.
Human detection
signal
Cooling : Set temp. + 2°C
Heating : Set temp. - 2°C
Set temp.
MaxHz
Compressor
speed
MinHz
0Hz
Remote control
Intelligent Eye
button
Operation
Fan speed (H1)
ON
OFF
ON
OFF
OFF
Set speed
Set speed - 50 rpm
The lower limit by detecting
human. (Prohibition of
thermostat-off)
Set speed
in case of
thermostat-off
Frequency at set temp. + 2°C
20 min.
40 min.
20 min.
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