Daikin RQYQ140-180PY1 Service Manual page 94

Field Setting from Outdoor Unit
Set cool/heat at all outdoor unit systems simultaneously for each outdoor unit external control adaptor
by using the central remote controller.
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Install the outdoor unit external control adaptor (optional accessory) onto the outdoor-
outdoor, indoor-outdoor, or indoor-indoor transmission line.
Use "setting mode 1" and set all outdoor units to SLAVE.
Set the outdoor unit external control adaptor SS1 to BOTH (factory set) or C/H and set SS2 to ON.
Use "setting mode 2" and set DS1 and DS2 on the outdoor unit external control adaptors
and the unified heat/cool address on the outdoor unit main PCB to the same address. (The
factory set addresses are all "0".)
SiBE341001
Test Operation