Switching the Changeover Master About the changeover master When multiple indoor units are connected to one outdoor unit or branch selector unit, by giving the authority to switch the operation mode to a specific indoor unit, the operation switching of other indoor units can be controlled. • Only the remote controller set as the changeover master can select cooling, heating or auto operation modes. • Remote controllers not set as the changeover master will follow the operation mode of the changeover master.
• Setting and cancellation of the changeover master needs to be carried out on the remote controller that is already the changeover master, and the remote controller that is to be set as the changeover master. • Depending on the system, this function may not be available. Possible operation mode selections for a remote controller that is a changeover master or a mode follower * Depending on the air conditioner and the system, some operation modes may not exist. Example of the changeover master settings In the following cases, it is necessary to give the authority to choose cooling/heating to 1 remote controller: • When multiple indoor units are connected to the same heat pump outdoor unit.
• When multiple indoor units are connected to the same branch selector port in a heat recovery system. 19 Operation modes for the remote controller that is a changeover master Operation modes that can be selected by remote controllers that is a mode follower Heating via Heat/Auto Heat, Fan Cooling via Cool/Auto Cool, Dry, Fan Dry Cool, Dry, Fan Fan Fan