Heat Controller REG-253H - Manual (Page 8)

Owner’s Manual Room Air Conditioner with R-410A Heat Controller, Inc.
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and Fan. The indicator light beside the selected mode will
illuminate and remain on once the mode is selected.
To operate in Auto feature:
When you set the air conditioner to AUTO mode, it
will automatically select cooling, heating or fan only
depending on what temperature you have selected and
the room temperature.
The air conditioner will control room temperature
automatically around the temperature set point selected.
To operate in Fan only:
Use this function when cooling is not desired, such as
for room air circulation or to exhaust stale air (on some
models). Remember to open the vent during this function,
but keep it closed during cooling for maximum cooling
efficiency. You can choose any fan speed you prefer.
To operate in Dry mode:
In this mode, the air conditioner will generally operate in
the form of a dehumidifer to remove humidity from the air.
However, some degree of cooling will continue.