Daikin ARKH20CVMB7, Service Manual

Page: 52 / 248

SiENBE04-512A Main Functions
Function and Control 43
1.7 INTELLIGENT EYE
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 sifted 2°C from the set
temperature. (Cooling : 2°C higher, Dry: 1°C higher and Auto : according to the operation
mode at that time.)
H
1 In case of Fan mode, the fan speed reduces by 50 rpm.
1 s ec
sa mpling (20m s ec)
High
Low
ON
OFF
S en s or o u tp u t
(H u m a n motion)
(R2 8 21)
H u m a n detection
s ign a l
If the s en s or detect s the o u tp u t s 10 time s / s ec.
or more, it j u dge s h u m a n s exi s t.
ON
OFF
RE S ET.
Cooling : S et temp. + 2°C
He a ting : S et temp. - 2°C
20 min. 20 min.
within 20
min
u te s .
40 min.
M a xHz
Mi nHz
0Hz
ON
OFF
ON
OFF
Oper a tion
OFF
F a n s peed (
H
1)
S et s peed - 50 rpm
S et s peed S et s peed
Fre qu ency a t s et temp. + 2°C
S et temp.
(R4902)
Remote control
Intelligent Eye
bu tton
The lower limit b y detecting
h u m a n.
(Prohi b ition of thermo s t a t-off)
in c as e of
thermo s t a t-off
Compre ss or
s peed
H u m a n detection
s ign a l
SiENBE04-512A.book Page 43 Friday, October 5, 2007 1:49 PM