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21
10. Operation Control
10.1 Basic Function
Inverter control, which equipped with a microcomputer in determining the most suitable operation mode as time
passes, automatically adjusts output power for maximum comfort always. In order to achieve the suitable operation
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.
10.1.1 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.
10.2 Cooling operation
10.2.1 Thermostat control
Capability supply to indoor unit is OFF (Expansion valve closed) when Intake Air Temperature - Internal setting
temperature < -3.6°F.
Capability resume supply to indoor unit after waiting for 3 minutes, if the Intake Air temperature - Internal setting
temperature > Capability supply OFF point.
10.3 Soft Dry Operation
10.3.1 Thermostat control
Capability supply to indoor unit is OFF (Expansion valve closed) when Intake Air Temperature - Internal setting
temperature < -5.4°F.
Capability resume to indoor unit after waiting for 3 minutes, if the Intake Air temperature - Internal setting
temperature > Capability supply OFF point.
10.4 Heating Operation
10.4.1 Thermostat control
Capability supply to indoor unit is OFF (Expansion valve closed) when Intake Air Temperature - Internal setting
temperature > 1.8°F.
During this condition, the indoor fan is stopped if compressor is ON.
Capability resume supply to indoor unit after waiting for 3 minutes, if the Intake Air Temperature - Internal setting
temperature < Capability supply OFF point.
Remote Control Setting Temperature
60.8°F - 86°F
Setting Temperature Limit Checking
(Min: 60.8°F; Max 91.4°F)
Auto Operation Mode Shifting
Indoor Air Temperature Shifting
Outdoor Air Temperature Shifting
Powerful Mode Shifting
Internal Setting Temperature
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