'20 • SRF-SM-311
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9
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(16) Outline of automatic operation
(15) Outline of dehumidifying (DRY) operationion
(a) Purpose of DRY mode
The purpose is "Dehumidication", and not to control the humidity to the target condition.
Indoor/outdoor unit control the operation condition to reduce the humidity, and also prevent over cooling.
(b) Outline of control
(i) Indoor fan speed and compressor are controlled by the area which is selected by the temperature difference.
(ii)
The indoor unit check the current area by every 5 minutes, and operate by the next checking.
(c) Other
When the outside temperature and room temperature is low for cooling operation, indoor unit can not operate in cooling, and
dehumidify. In this case, the units operate in heating to rise the room temperature, and after that start DRY operation.
Area
DCBA
Me speed
Indoor fan
speedULo(Lo) speed
STOP
Limited䠄Lower than
normal cooling operation䠅
Limited
Minimum
䠄Lower than the speed in ”Area A”䠅
STOP
set temperature
Difference between set temperature and return air temperature
Heating
SP: Setting temperature
SP
Indoor air
temperature (˚C)
28
Outdoor air temperature (˚C)
(b) Operation mode is changes when keep cooling and heating thermostat off 20 minutes and be satisfied following
conditions.
If the setting temperature is changed with the remote control, the operation mode is judged immediately.
(c) When the unit is started again within one hour after the stop of automatic operation or when the automatic operation is
selected during heating, cooling or dehumidifying operation, the unit is operated in the previous operation mode.
(d) Setting temperature can be adjusted within the following range. There is the relationship as shown below between the signals
of the wireless remote control and the setting temperature.
(e) When the unit is operated automatically with the wired remote control, the cooling operation is controlled according to
the display temperatures while the setting temperature is compensated by ＋2℃ during heating.
※It can not be changed to heating mode if outdoor air temperature is 28℃ or higher.
Heating
SP: Setting temperature
Indoor air temperature−Setting temperature (˚C)
Keep operation
mode
Cooling
Signals of wireless remote control (Display)
18 19 20 21 22 23
24
25 26 27 28 29 30
18 19 20 21 22 23
24
25 26 27 28 29 30
20 21 22 23 24 25
26
27 28 29 30 31 32
Setting
temperature
Cooling
Heating
SP
＋
1
SP
−
1
(a) Determination of operation mode
Operation mode is determined by indoor air temperature and outdoor air temperature as following.
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