Samsung MR-DH00 Technical Data Book page 85

General external contact point control
DI : Voltage free contact signal input (Open / Short)
DO : Contact signal output (DC 12V)
Note
Indoor unit usage restriction
❶
❶
Check the indoor unit address.
❷
Select the Limit mode
Control mode will be set automatically depends on the seleceted restricted mode
❸
Set the Upper temperature limit in Heating and Lower temperature limit in Cooling.
❹
❸
❷
❹
85