Hitachi RAC-18WPD, Service Manual

Page: 15 / 93

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13 –
ENGLIS H
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.
O
By pressing the
(ECO) button during AUTO, HEATING,
DEHUMIDIFYING or COOLING operation, the air conditioner performs the "ECO" operation.
1
Q
To
start
ECO
operation
Q
To
cancel
ECO
operation
O
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.
O
Press
(START/STOP) button. Or
O
Press
(ECO) button again.
“
” disappears from the LCD.
A beep sound is emitted from indoor unit.
NOTE
O
ECO function will not be effective when power consumption is low.
O
By pressing (POWERFUL) button, ECO operation is cancelled.
O
After auto restart, ECO operation is cancelled and previous operation mode shall start.
O
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.
Q
ECO
OPERATION
ECO operation is an energy saving function by changing set temperature automatically and by limiting the maximum power consumption value.
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14 –
ECO
OPERATION
O
By pressing the
(ECO) button during AUTO, HEATING,
DEHUMIDIFYING or COOLING operation, the air conditioner performs the "ECO" operation.
1
Q
To
start
ECO
operation
Q
To
cancel
ECO
operation
O
Press
(ECO) button during operation.
“
” is displayed on the LCD.
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.
O
Press
(START/STOP) button. Or
O
Press
(ECO) button again.
“
” disappears from the LCD.
A beep sound is emitted from indoor unit and the (ECO) lamp on the indoor unit turns off.
NOTE
O
By pressing (POWERFUL) button, ECO operation is cancelled.
O
After auto restart, ECO operation is cancelled and previous operation mode shall start.
Q
ECO OPERATION with sensor
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.
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]
Setting
temperature
Shift
temperature
Shift
temperature
20 minutes
60 minutes
Setting
temperature
Shift
temperature
Shift
temperature
20 minutes
60 minutes
The unit returns to normal operation when the sensor detects human movement.
15