Arctic King MWHUK-15CRN8-BCK8 Operator's Manual page 31

Remote Control Operating Instructions
How to Use the Buttons
AUTO Operation
In AUTO mode, the air conditioner can automatically
choose between the COOL, FAN, and HEAT mode by
sensing the difference between the actual room
temperature and the set temperature on the remote control.
AUTO cannot
AUTO
COOL/HEAT/FAN Operation
or FAN mode.
steps: AUTO, LOW, MED, or HIGH.
In FAN mode, the set temperature is not displayed in the
remote control, the room temperature cannot be controlled.
In this case only Steps 1, 2, and 4 may be performed.
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AUTO.
COOL