Hitachi RAC-18WPB, Service Manual

Page: 30 / 148

–
13
–
ENGLISH
ECO
OPERA
TION
ECO
operation
is
an
energy
saving
function
by
changing
set
temperature
automatically
and
by
limiting
the
maximum power consumption value.
By
pressing
the
(ECO)
button
during
AUTO,
HEATING,
DEHUMIDIFYING
or
COOLING
operation,
the
air
conditioner
performs the "ECO" operation.
1
To
star
t
ECO
operation
To
cancel
ECO
operation
Press
(ECO) button during operation.
“ ” is displayed on the LCD. A beep sound is emitted from indoor unit. Energy
saving
operation
will
start
by
changing
the
set
temperature
higher
or
lower
automatically
and
reducing
operation
power
consumption.
This
function
may
vary
based
on
the
connected
outdoor unit.
Press
(START/STOP) button. Or
Press
(ECO) button again.
“ ” disappears from the LCD. A beep sound is emitted from indoor unit.
NO
TE
ECO
function
will
not
be
effective
when
power
consumption
is
low.
By
pressing
(POWERFUL)
button,
ECO
operation
is
cancelled.
After
auto
restart,
ECO
operation
is
cancelled
and
previous
operation
mode
shall
start.
For
multi
model
connections,
energy
saving
operation
shall
start
only
by
changing
set
temperature
higher
or
lower
automatically.
However,
effectiveness
of
ECO
depends
on
operation
conditions.
ECO OPERATION
There are two kinds of ECO OPERATION with sensor or without sensor, depending on models. Please refer to [Names and Functions of each part] in the unit instruction manual to verify if your unit is equipped with a sensor and read the following instruction on ECO Operation accordingly.
–
14
–
ECO
OPERA
TION
By
pressing
the
(ECO)
button
during
AUTO,
HEATING,
DEHUMIDIFYING
or
COOLING
operation,
the
air
conditioner
performs the "ECO" operation.
1
To
star
t
ECO
operation
To
cancel
ECO
operation
Press
(ECO) button during operation.
“
” is displayed on the LCD.
Press
(START/STOP) button. Or
Press
(ECO) button again.
“
” disappears from the LCD.
NO
TE
By
pressing
(POWERFUL)
button,
ECO
operation
is
cancelled.
After
auto
restart,
ECO
operation
is
cancelled
and
previous
operation
mode
shall
start.
The sensor detects the presence of people in the room. When nobody is detected, the unit automatically starts enegy saving operation by shifting the set temperature in two steps.
A beep sound is emitted from indoor unit and the (ECO) lamp on the indoor unit lights up. The sensor starts to detect the presence of people in the room. A beep sound is emitted from indoor unit and the (ECO) lamp on the indoor unit turns off.
When the presence of people is not detected for 20 minutes, the set temperature is automtatically shifted for energy saving. If nobody is in the room for 60 minutes , the set temperature is shifted further .
Cooling operation [diagram representation for illustrative purpose only]
Heating operation [diagram representation for illustrative purpose only]
The unit returns to normal operation when the sensor detects human movement.
Setting
temperature
20 minutes
60 minutes
Shift
temperature
20 minutes
60 minutes
Shift
temperature
Shift
temperature
Setting
temperature
Shift
temperature
30
ECO OPERATION with sensor