Hitachi PC-ART Installation Manual page 4

4.1.4. OPERATION PROCEDURE FOR AUTOMATIC COOLING/HEATING OPERATION
The automatic cooling/heating operation must be set using the optional function. Contact your distributor or HITACHI dealer for more
detailed information. This function enables the operation mode (cooling or heating) to be changed automatically according to the
temperature difference between the set temperature and the suction air temperature.
If the suction air temperature exceeds the set temperature by 3°, the operation changes to COOL mode. If it is 3°C lower than the set
temperature, the operation changes to HEAT mode.

NOTE:
If the heating operation is set at the LOW fan speed, the protective devices will often cause the system to stop. In this case, set the
fan speed to HIGH or MED.
If the outside temperature is over approximately 21°C, the heating operation is not available.
The temperature difference between the cooling and heating operations is quite considerable when this function is used. This
function cannot therefore be used for air conditioning a room where accurate control of temperature and humidity is required.
4.1.5. PROCEDURE FOR SETTING THE SWING LOUVER
1. When the SWING LOUVER switch is pressed, the swing louver starts its
operation. The range of the angle of swing is approximately 70° from the
horizontal to the vertical position. When the "
indicates the continuous operation of the louver.
2. When the swinging operation of the louver is not required, press the SWING
LOUVER switch again. The louver stops at the angle indicated by the
Ã
direction of the " " symbol.
3. The discharge air angle is ¿ xed at 20° for the RCI series and 40° for RCD
series during the start-up of the heating and defrosting operation when the
thermostat is on. When the outlet air. temperature exceeds approximately 30
°C, the louvers start to swing.
1. For COOL and DRY modes, the discharge air angle can be changed to
5 different positions. For the heating operation, it can be changed to 7
positions.
2. To ¿ x the louver position, ¿ rst press the SWING LOUVER switch to start the
louver swinging, and then press again when the louver reaches the required
position.
3. The discharge air angle is ¿ xed at 20° for the RCI series and 40° for the RCD
series during the start-up of the heating and defrosting operation when the
thermostat is on.When the outlet air temperature exceeds approximately 30
°C, the louvers start to swing.
When the louvers are ¿ xed at an angle of 55° for RCI, 65° for RCD or
70° for both during the heating operation, and the operation mode is
changed to cooling, the louvers will be automatically ¿ xed at an angle of
45° for RCI or 60° for RCD.

NOTE:
There is a time lag between the actual angle of the louver and the indication
on the liquid crystal display. When the SWING LOUVER switch is pressed,
the louver will not stop immediately. The louver will move one extra swing.
If the louvers are moved when cleaning or for any other reason, select the
auto setting mode to move the four louvers to the same position.
INSTALLATION MANUAL
Ã
" symbol is moving, this
RCI (4-way cassette type)
½ ¾ Ñ ¿ À Á Â
Indication
Louver angle
Approx. Approx. Approx.
(approx.)
25° 30° 35°
Cooling
Angle Range
Heating
Angle range
Recommended angle
RCD (2-way cassette type)
½ ¾ Ñ ¿ À Á Â
Indication
Louver angle
Approx. Approx. Approx.
(approx.)
40° 45° 50°
Cooling
Angle Range
Heating
Angle range
Recommended angle
RPK (Wall-mounted type)
½ ¾ Ñ ¿ À Á Â
Indication
Louver angle
Approx. Approx. Approx.
(approx.) 35° 40° 45°
Angle Range
Cooling
Louver angle
Approx. Approx. Approx.
(approx.) 40° 45° 50°
Angle Range
Heating
Angle range
Recommended angle
RPC (Ceiling-mounted type)
½ ¾ Ñ ¿ À Á Â
Indication
Louver angle Approx. Approx.
Horizontal
(approx.)
15° 30°
Cooling
Angle Range
Heating
Angle range
Recommended angle
13
Approx. Approx. Approx. Approx.
40° 50° 55° 60°
Angle Range
Approx. Approx. Approx. Approx.
55° 60° 65° 70°
Angle Range
Approx. Approx. Approx. Approx.
50° 55° 60° 70°
Approx. Approx. Approx. Approx.
55° 60° 65° 70°
Approx. Approx. Approx. Approx.
40° 50° 60° 80°
Angle Range