Samsung MCM-A300BN User & Installation Manual

23EnglishInstalling the ProductExternal contact control for DI ports (optional feature)DI pattern settingsConfigure pattern settings from [Settings] > [System] > [DI pattern].• DI ports: Connect dry-contact inputs to these ports.DI1 DO1DI2 DO2Control patternsPattern Control detailsPattern 1 There is no external input. (factory settings state)If a contact-control signal is received through port 1, the Controller does not control anything.Pattern 2If a DI-1 ON signal is received, the Controller switches to emergency stop mode.It stops the operations of all indoor units, and sends a command to the indoor units so that they cannotbe controlled using the remote control.While in the emergency stop state, issuing control commands by users is prevented.Schedule control also does not work. If the contact-control signal state changes to OFF, controlcommands are processed normally. (In pattern 2, DI-2 is not used.)Pattern 3If a DI-1 ON signal is received, the Controller turns on all indoor units. It turns off all indoor units if a DI-1OFF signal is received.If a DI-2 ON signal is received, the Controller enables the remote control for all indoor units. It disablesthe remote control if a DI-2 OFF signal is received.Pattern 4The effective pulse width for input signals is 0.5 to 1.0 seconds. Signals with a pulse width of less than0.5 seconds or of 1.0 seconds or more are ignored.If a pulse contact signal enters DI-1, the Controller sends the ON command to all indoor units.If a pulse contact signal enters DI-2, the Controller sends the OFF command to all indoor units.