Dettson EVO Installation And Owner's Manual page 85

9. Operation
To set the operation mode
Operation mode setting (Heat mode is invalid for cool only type unit).
When the mode is selected as auxiliary heating (or electric heating) mode,
is displayed, the fan speed is Auto. The Sleep, 8-degree heating, Turbo,
and Rotation functions are not available in auxiliary heating mode. When
the mode is selected as heating & electric heating mode,
displayed, and the Turbo and Rotation functions are disable.
Press this button to select the operation mode:
If the indoor unit has Electric heating (auxiliary
heating) feature, press this button to select the
operation mode:
is
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