Daikin RXYQ72 Serivce Manual page 101

Field Setting
Set Cool / Heat Separately for Each Outdoor Unit System by Cool / Heat Selector
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It does not matter whether or not there is outdoor - outdoor unit wiring.
Set outdoor unit PC board DS1-1 to OUT (factory set).
Set cool/heat switching to IND (individual) for "Setting mode 1" (factory set).
SiUS39-601
Test Operation