Daikin RQYQ140-180PY1 Service Manual page 90

Field Setting from Outdoor Unit
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 PCB DS1-1 to OUT (factory set).
Set cool/heat switching to IND (individual) for "Setting mode 1" (factory set).
SiBE341001
Test Operation