User`s manual

10
Rustling of leaves
Pendulum of a wall clock
Normal office
Indoor unit
Library
Outdoor unit
Side view
7 m
Top view
7 m
110˚
This series gives you the choice of 5-step, Quiet or
Automatic settings for the fan speed. The Quiet setting
selects Indoor Unit Quiet Operation. This function
decreases the operation sound level by 3 dB below the
Low setting.
This wide range of settings allows you to precisely
control the fan speed according to your requirements.
For example, Indoor Unit Quiet Operation provides you
with a good night’s sleep. The sound level for FTK(X)S
25E is 22 dB.
Outdoor Unit Quiet Operation is available for all models
from 2.5 to 7.1 kW class. This function decreases the
operation sound level by 3 dB below the rated
operation. It provides a low sound level of 43 dB for
RK(X)S25EB.
Capacity may decrease when Outdoor Unit Quiet Operation is selected.
Fan speeds
High (H)
Low (L)
Quiet (SL)
Sound levels
37 dB
25 dB
22 dB
FTK(X)S25E
(dB)
22 30 40 43 5020
22 dB Is So Quiet You Can Even Hear Whispers
Indoor Unit Quiet Operation
Intelligent Eye prevents energy wastage by using its
infrared sensor to detect human movement in a room.
When there is no movement, Intelligent Eye increases/
decreases the temperature by 2 C to give energy
savings of up to 20% for cooling operation and 30% for
heating operation. This reduces energy wastage if, for
example, you forget to turn off the air conditioner.
All models from 2.5 to 7.1 kW class are equipped
with Intelligent Eye. This function can be conveniently
activated from the remote controller.
Once Intelligent Eye is set, it continues to work to save energy. You do not
need to push the SENSOR button each time you wish to use this function.
Intelligent Eye
Outdoor Unit Quiet Operation
3 dB
RK(X)S25EB
Operations
Rated (H)
Quiet (L)
Sound levels
46 dB
43 dB
3 dB
Selects fan speed and
Indoor Unit Quiet Operation
Indoor Unit Quiet Operation icon
Outdoor Unit Quiet Operation
The Intelligent Eye
indicator lights when
movement is detected.
Intelligent Eye
sensor
Intelligent Eye button
Econo Mode button
When you are in the room, the air
conditioner maintains the set
temperature.
If Intelligent Eye detects no human
movement for 20 minutes, it
automatically adjusts the set
temperature by 2 C.
When you enter the room,
Intelligent Eye automatically
returns the temperature to the
set level.
Each decrease in airflow volume
reduces the sound level by 2 or 3 dB.
Fan
speed
Sound
level
H
Low High
LSLAuto M
This function limits both the maximum running current
and maximum power consumption to 70% of those
during normal operation. It is particularly effective if the
cooling/heating load is high, for example, at start-up or
during large gatherings and periods of direct sunshine.
At the same time, it maintains maximum capacity at
80% of normal, giving improved operating efficiency,
although it may take slightly longer to reach the set
temperature.
Econo Mode is also useful for preventing circuit
breakers from being overloaded during temporary
peaks in the running current. The function is easily
activated from the remote controller by pushing the
ECONO button. Econo Mode is available for
FTK(X)S25/35E.
Econo Mode
From start-up until set
temperature is reached
100%
70%
• This diagram is a representation for illustrative purposes only.
• Maximum capacity decreases during Econo Mode, requiring
more time to reach the set temperature.
Maximum during
normal operation
Running current and
power consumption
Time
Normal
operation
Econo
Mode
Maximum during
Econo Mode
During cooling operation
During cooling operation
Based on “Examples of Sound Levels”, Ministry of the Environment, Japan,
November 12, 2002
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