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33
Control board (OUTDOOR UNIT)
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9 Operation and Control
9.1.
Simultaneous Operation Control (Multi Type Only)
1. Operation modes which can be selected using the
remote control unit: Automatic, Cooling, Dry, Heating,
Fan operation mode.
Fan operation mode.
2. Types of operations modes which can be performed
simultaneously
• Cooling operation and cooling, dehumidifying or fan
operation
• Heating operation and heating operation
3. Types of operation modes which cannot be
performed simultaneously
• While a cooling operation is in progress, a heating
operation cannot be performed by an indoor unit in
another room.
In the room where the operation button for cooling was
pressed first, the operation is continued. In the room
where the operation button for heating was pressed
afterward, the operation lamp of the indoor unit blinks,
where the attempt is made to establish the heating
operation. Its fan is stopped, and the air does not
discharged.
another room.
In the room where the operation button for cooling was
pressed first, the operation is continued. In the room
where the operation button for heating was pressed
afterward, the operation lamp of the indoor unit blinks,
where the attempt is made to establish the heating
operation. Its fan is stopped, and the air does not
discharged.
• While a heating operation is in progress, a cooling
operation cannot be performed by an indoor unit in
another room.
In the room where the operation button for heating was
pressed first, the operation is continued. In the room
where the operation button for cooling was pressed
afterward, the operation lamp of the indoor unit blinks,
where the attempt is made to establish the cooling
operation. Its fan is stopped, and the air does not
discharged.
another room.
In the room where the operation button for heating was
pressed first, the operation is continued. In the room
where the operation button for cooling was pressed
afterward, the operation lamp of the indoor unit blinks,
where the attempt is made to establish the cooling
operation. Its fan is stopped, and the air does not
discharged.
4. Operation mode priority control
• The operation mode designated first by the indoor unit
has priority.
• If the priority indoor unit stops operation or initiates the
fan operation, the priority is transferred to other indoor
units.
units.
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9.2.
Basic Function
Inverter control, which equipped with a microcomputer in determining the most suitable operating mode as time passes,
automatically adjusts output power for maximum comfort always. In order to achieve the suitable operating mode, the
microcomputer maintains the set temperature by measuring the temperature of the environment and performing temperature
shifting. The compressor at outdoor unit is operating following the frequency instructed by the microcomputer at indoor unit that
judging the condition according to internal setting temperature and intake air temperature.
automatically adjusts output power for maximum comfort always. In order to achieve the suitable operating mode, the
microcomputer maintains the set temperature by measuring the temperature of the environment and performing temperature
shifting. The compressor at outdoor unit is operating following the frequency instructed by the microcomputer at indoor unit that
judging the condition according to internal setting temperature and intake air temperature.
9.2.1.
Internal Setting Temperature
Once the operation starts, remote control setting temperature will be taken as base value for temperature shifting processes.
These shifting processes are depending on the air conditioner settings and the operation environment. The final shifted value
will be used as internal setting temperature and it is updated continuously whenever the electrical power is supplied to the unit.
These shifting processes are depending on the air conditioner settings and the operation environment. The final shifted value
will be used as internal setting temperature and it is updated continuously whenever the electrical power is supplied to the unit.
Table (a): Auto Operation Mode Setting
Table (b): Outdoor Air Temperature Shifting
Table (c): Power Mode Shifting
Mode Shift:
Temperature Shift (
°C)
Cooling/Dry
→ Heating
-2.0
Heating
→ Cooling/Dry
+2.0
Mode:
Outdoor Temperature, X (
°C):
Temperature Shift (
°C)
Cooling/Dry
30
X
+0.5
X < 30
+1.0
Heating
9
X
-1.0
5 X < 9
-0.5
1 X < 5
0.0
X
1
+1.0
Mode:
Temperature Shift (
°C)
Cooling
-4.0
Dry
-2.0
Heating
+6.0
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Table (d): Indoor Air Temperature Shifting
1. Target room temperature shift value (dGetaDst)
• To offset the absolute gap between detection temperature with actual room temperature.
• The heat exchanger unit’s temperature is different based on operation mode, it becomes the action operation mode value.
• The heat exchanger unit’s temperature is different based on operation mode, it becomes the action operation mode value.
2. Room temperature shift value (dGeta)
• When compressor ON/OFF, correction of detected room temperature by shift value during defrost etc.
i) Initial value when operation starts, or changing the actual operation mode.
Set the offset value at each operation mode. However, in order to improve the heating startup efficiency, the offset value
will be changed based on the gap between setting temperature and room temperature.
Set the offset value at each operation mode. However, in order to improve the heating startup efficiency, the offset value
will be changed based on the gap between setting temperature and room temperature.
ii) Updating during operation
During operation, it will compare with the target room temperature offset value at specific period, then the room temperature
will be updated.
During operation, it will compare with the target room temperature offset value at specific period, then the room temperature
will be updated.
Update the room temperature offset value (dGeta)
However, if the following condition is occurred, temperature cannot detect correctly and therefore no updating will be done.
• Heating zone E and above (Temperature gap is big and great capacity increased.)
• During deice
• After deice complete *within 600 sec.
• Comp. stop
• During deice
• After deice complete *within 600 sec.
• Comp. stop
Comp. starting *within 600 sec.
Table (e)
9.3.
Room Temperature Control (Compressor Control)
Operating frequency of a compressor is decided according to temperature differences between remote controller setting and room
temperatures. By adding a relative method, based on current frequency, which gives frequency changes, a room temperature is
adjusted.
temperatures. By adding a relative method, based on current frequency, which gives frequency changes, a room temperature is
adjusted.
Actual operation mode
Target room temperature offset value (dGetaDst)
Cooling
(1)
Heating
(2)
Dry
(3)
Actual operation mode
Gap between setting temperature and room temperature
Room temperature offset value (dGeta)
Cool
—
(0)
Heat
(Operation start set temp. - room temp.) < 4
°C
(4)
(Operation start set temp.) 4
°C
(4)
Dry
—
(0)
Actual operation mode
Room temperature zone
Updating period (sec.)
Cool
—
(180)
Heat
A, B, C, D zone
(15)
Dry
—
(180)
Temperature condition
Room temp. offset value after modified (dGeta)
Target room temp. offset value > Room temp. offset
value (dGetaDst > dGeta)
dGeta + (0.5)
Target room temp. offset value < Room temp. offset
value (dGetaDst < dGeta)
dGeta - (0.5)
Target room temp. offset value = Room temp. offset
value (dGetaDst = dGeta)
Do not change.
Installation position change heating shift
-4
°C
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