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Mini VRF SYSTEM
Control Functions - Indoor Unit
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6. Automatic Heating / Cooling Control
6. Automatic Heating / Cooling Control
Control temp. for cooling 22˚C * 20°C (temperature set) + 2°C (*3)
* 20°C (temperature set) – 2°C (*3)
Remote controller display 20˚C
Control temp. for heating 18˚C
Operating mode change Shifted set temp.
Heating → Cooling 20 + 2 (*3) + 0.5 = 22.5°C or higher (*2)
Cooling → Heating 20 – 2 (*3) – 1.0 = 17°C or lower
1
2
This function is only valid as long as one indoor unit is installed within one refrigerant system or all indoor
units are controlled within a group control.
When operating in a group control, the sub-indoor units become the same operation mode of the main unit.
As for the indoor units in a group control, install them in the same air conditioning circumstances.
Use the temperature sensor which is built-in sensor of the indoor unit.
*2: Dur
*3: Correction temp. is different depending on the model.
See the right column [ Indoor item code "1E" ] under the section “14. Parameter”.
ing heating operation when the body sensor is used, a temperature shift is applied to the intake temperature
detected by the sensor, in consideration of the difference in temperature at the top and bottom of the room.
(Refer to the “Room Temperature Control” item.) If this intake shift temperature is 4°C, then the heating
cooling
change occurs when the temperature detected by the body sensor is 26.5°C or higher.
4 Cooling (heating) operation does not change if the room temperature changes from area C
A (or A C) within 10
minutes after the compressor turns OFF. (Monitoring mode is excepted.)
5 When the heating/cooling change
occurs, the 4-way valve switches
approximately 30 to 50 seconds
after the compressor turns ON.
Control temp. for cooling
Control temp. for heating
Selected operating mode
Selected operating mode
Remote controller display
–2 deg
–1 deg
+1 deg
+3 deg
+2 deg
+2.5 deg
–3 deg
Thermostat
ON
ON
OFF
ONOFF ON ONOFF
ON
OFF
OFF
A
B
C
HeatingHeating Cooling
1 When operation starts, heating or cooling is selected according to the set temperature and the room temperature.
Room temperature Set temperature + 1 Cooling
Set temperature – 1 < Room temperature Set temperature + 1 Monitoring mode (*1)
Room temperature < Set temperature – 1 Heating
*1: If the difference between the room temperature and set temperature is small when operation starts, the cooling
thermostat remains in standby status (OFF) until the temperature difference increases. When the temperature
difference increases, either cooling operation or heating operation is selected. This standby status is known as
“monitoring mode.”
2 After operation starts in the selected operating mode, the set temperature is automatically shifted by +2°C (*3) (cooling
operation) or –2°C (*3) (heating operation).
Example: Temperature set on the remote controller is 20°C.
3 Operating mode changes (heating
cooling, cooling heating) which occur during operation as a result of
temperature changes are handled as shown below.
Heating cooling: Room temperature Shifted set temperature (set temperature + 2°C (*3)) + 0.5°C
Cooling heating: Room temperature Shifted set temperature (set temperature – 2°C (*3)) – 1.0°C
Example: Temperature set on the remote controller is 20°C.
SM830258-01_欧州向け_1fan_mini_VRF.indb 7 18/02/09 10:54:36
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