•  The A/C amplifier switches modes between the A/C mode and ECO mode based on the input signal from the ambient temperature sensor and the air intake mode. When the air intake mode is REC, the system is set to A/C mode. If during FRESH mode the ambient temperature is low or high, the A/C mode is selected, if it is in the medium range ECO mode is selected.

•  If the evaporator temperature is at a specific value during ECO mode, the A/C signal is switched on/off (magnetic clutch on/off). When the A/C signal is on/off, the evaporator temperature is determined based on the signal from the ambient temperature sensor and the target temperature. If the target temperature is low, the on/off temperature is set low, if it is high, the on/off temperature is set high. If the ambient temperature is high and increased air conditioning performance is required, or increased defrosting performance is required when windows fog easily due to low ambient temperature, the on/off temperature is set low. When none of the conditions above are applied, the on/off temperature is set high. As a result, A/C performance and fuel economy during A/C operation time have been improved.

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•  When the defroster switch is turned on, the system is switched to A/C on mode to improve defrosting.

•  When the set temperature is at 32.0, the system is set to A/C off mode, when it is at 18.0, it is set to A/C on mode.

•  The A/C on mode or A/C off mode can be selected by operating the A/C switch.