Daikin R410As Service Manual page 137

Field Setting
3.2.2 Cool / Heat Mode Switching
There are the following 5 cool/heat switching modes.
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$ Set Cool/Heat Separately for Each Outdoor System by Indoor Unit Remote Controller
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Set cool/heat separately for each outdoor unit system by indoor unit remote controller.
Set cool/heat separately for each outdoor unit system by cool/heat switching remote
controller.
Set cool/heat for more than one outdoor unit system simultaneously in accordance with
unified master outdoor unit by indoor unit remote controller.
Set cool/heat for more than one outdoor unit system simultaneously in accordance with
unified master outdoor unit by cool/heat switching remote controller.
It does not matter whether or not there is outdoor - outdoor unit wiring.
Set outdoor unit PC board DS1-1 to "indoor" (factory set).
Set cool/heat switching to "individual" for "Setting mode 1" (factory set).
Si39-302
Test Operation