Hitachi RAC-18WPB, Service Manual

Page: 27 / 148

– 7 –
ENGLISH
HEA
TING OPERA
TION
●
Use the device for heating when the outdoor temperature is under 21°C. When it is too warm (over 21°C), the heating function may not work in order to protect the device.
●
In order to maintain reliability of the device, please use this device when outdoor temperature is above –15°C.
Press the MODE selector button so that the display indicates (HEAT). Set the desired FAN SPEED with the (FAN SPEED) button (the display indicates the setting).
(AUTO)
(HIGH)
(MED)
(SILENT)
(LOW)
Set the desired room temperature with the TEMPERATURE buttons (the display indicates the setting). The temperature setting and the actual room temperature may vary depending on conditions. Press the
(START/STOP) button. Heating operation starts with
a beep. Press the button again to stop operation.
■
As the settings are stored in the memory of the remote controller, you only have to press the
(START/STOP) button next time.
■
During AUTO fan, the fan speed automatically changes as below:
●
When the difference between room temperature and setting temperature is large, fan starts to run at HI speed.
●
After room temperature reaches the preset temperature, fan speed will be changed to lower speed to obtain optimum room temperature condition for natural healthy heating.
ST
AR
T
ST
OP
Defrosting will be performed about once an hour when frost forms on the heat exchange of the outdoor unit, for 5~10 minutes each time. During defrosting operation, the operation lamp blinks in a cycle of 3 seconds on and 0.5 second off. The maximum time for defrosting is 20 minutes. However, if the indoor unit is connected to multi type outdoor unit, the maximum time for defrosting is 15 minutes. (If the piping length used is longer than usual, frost is likely to form.)
1
2
3
Defr
osting
– 8 –
DEHUMIDIFYING OPERA
TION
■
Dehumidifying Function
●
When the room temperature is higher than the temperature setting: The device will dehumidify the room, reducing the room temperature to the preset level. When the room temperature is lower than the temperature setting: Dehumidifying will be performed at the temperature setting slightly lower than the current room temperature, regardless of the temperature setting.
●
The preset room temperature may not be reached depending on the number of people present in the room or other room conditions.
Set the desired room temperature with the ROOM TEMPERATURE setting buttons (the display indicates the setting).
The range of 20-26C is recommended as the room temperature for dehumidifying.
Press the
(START/STOP) button. Dehumidifying operation
starts with a beep. Press the button again to stop operation.
■
As the settings are stored in the memory of the remote controller, you only have to press the
(START/STOP) button next time.
ST
AR
T
ST
OP
Press the MODE selector button so that the display indicates
(DEHUMIDIFY).
The fan speed is set at LOW. Press
(FAN SPEED) button to select SILENT or LOW fan
speed.
Use the device for dehumidifying when the room temperature is over 16°C. When it is under 15°C, the dehumidifying function will not work.
1 2
27