Carrier RG67V/BGEF Owner's Manual page 11

Press this button under COOL Mode to enter the energy efficient mode.
X-ECO
X-ECO
Note:This function is only available under COOL mode for heat pump air conditioner only.
Under cooling mode, press this button, the remote controller will adjust the temperature automatically to 24 °C, fan
speed of Auto to save energy (only when the set temperature is less than 24 °C). If the set temperature is above
24 °C, press the X-ECO button, the fan speed will change to Auto, the set temperature will remain unchanged.
Note:
Pressing the X-ECO button, or modifying the mode or adjusting the set temperature to less than 24 °C will stop ECO
operation.
Under ECO operation, the set tmeperature should be 24 °C or above, it may result in insufficient cooling. If you feel
uncomfortable, just press the X-ECO button again to stop it.
The unit will enter the
energy efficient mode.
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