Operation; Operation Mode Selection Procedure - Hitachi PC-ARF Technical Catalogue

4 Individual remote controls
PC-ART

4.2.5 Operation

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Before operation
C A U T I O N
• Turn on the electrical power supply to the system approximately 12 hours before start-up after a long shutdown. Do not start the sys-
tem immediately after connecting the power supply, because the compressor may be damaged if it is not sufficiently heated.
• Make sure the outdoor unit is not covered with ice or snow. If it is, remove the ice or snow with warm water (no hotter than 50°C). If
the water temperature is over 50°C, the plastic parts may be damaged.
• When the system is started after being out of use for more than 3 months, we recommend that the system is checked by the service
provider.
• If the system is not going to be used for a long period of time, turn it off at the mains. Otherwise it will continue to consume electricity,
since the oil heater remains on even when the compressor is off.

4.2.5.1 Operation mode selection procedure

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Procedure for operation in cooling, heating, dehumidifying and ventilation modes
Switch on the power.
Two vertical lines are displayed on the LCD display together with the A/C or VENTI indications.
Press the MODE button.
By pressing this button repeatedly, the indicator will change from COOL to HEAT, DRY and FAN modes
(or from COOL to DRY and FAN in cooling only models).
(The figure shows the system status when COOL mode is selected).
Press the RUN/STOP button.
The run indicator will light up (green). The system will start up automatically.
N O T E
Setting the temperature, fan speed and louver direction: Once this setting is made it is stored in the
memory and therefore does not need to be set again every day. To change this setting, refer to the
cedure for setting the temperature, fan speed and louver direction."
Turn off (STOP)
Press the RUN/STOP button again. The run indicator (green) will go off. The system will stop automati-
cally.
N O T E
The fan may run for a further two minutes or so after stopping the system in heating mode.
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Procedure for setting the temperature, fan speed and louver direction.
N O T E
• If the OK button is pressed for more than three seconds in operation mode, the unit will switch to check mode (CHECK).
• In check mode (CHECK), by pressing the OK button once the user can view the different variables using the TEMP  or  buttons.
• To return to operation mode, press and hold OK for more than three seconds and then press OK twice.
Setting the temperature
Set the temperature by pressing the TEMP  or  buttons.
The temperature increases by 1 °C when the  button is pressed (max. 30 °C).
The temperature decreases by 1 °C when the  button is pressed (min. 19 °C for Cool, Dry and Fan
modes; minimum 17 °C for Heat mode)
(The figure shows the temperature set to 28 °C).
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TCGB0106 rev.0 - 12/2014
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