Instruction SiEN18-622232 System Configuration2.2.14 Note for Multi System<>This system has one outdoor unit connected to multiple indoor units. Selecting the Operation Mode1. With the Priority Room Setting present butinactive or not presentWhen more than one indoor unit is operating,priority is given to the first unit that was turnedon. In this case, set the units that are turned onlater to the same operation mode (*1) as the firstunit.Otherwise, they will enter the Standby Mode, and the operation lamp will flash; this does notindicate malfunction.(*1)• COOL, DRY and FAN mode may be used at the same time.• AUTO mode automatically selects COOL mode or HEAT mode based on the roomtemperature.Therefore, AUTO mode is available when selecting the same operation modeas that of the room with the first unit to be turned on.<CAUTION>Normally, the operation mode in the room where the unit is first run is given priority, but thefollowing situations are exceptions, so please keep this in mind.If the operation mode of the first room is FAN Mode, then using Heating Mode in any roomafter this will give priority to heating. In this situation, the air conditioner running in FAN Modewill go on standby, and the operation lamp will flash.2. With the Priority Room Setting activeSee “Priority Room Setting” on the next page. NIGHT QUIET Mode (Available only for cooling operation)NIGHT QUIET Mode requires initial programming during installation. Please consult your retailer ordealer for assistance. NIGHT QUIET Mode reduces the operation noise of the outdoor unit during thenight time hours to prevent annoyance to neighbors.• The NIGHT QUIET Mode is activated when the temperature drops 5°C or more below thehighest temperature recorded that day. Therefore, when the temperature difference is less than5°C, this function will not be activated.• NIGHT QUIET Mode reduces slightly the cooling (heating) efficiency of the unit. OUTDOOR UNIT SILENT Operation1. With the Priority Room Setting present but inactive or not presentWhen using the OUTDOOR UNIT SILENT operation feature with the Multi system, set all indoorunits to OUTDOOR UNIT SILENT operation using their remote controls.When clearing OUTDOOR UNIT SILENT operation, clear one of the operating indoor units usingtheir remote control. However OUTDOOR UNIT SILENT operation display remains on the remotecontrol for other rooms. We recommend you release all rooms using their remote controls.2. With the Priority Room Setting activeSee “Priority Room Setting” on the next page. Cooling / Heating Mode Lock (Available only for heat pump models)The Cooling / Heating Mode Lock requires initial programming during installation.Please consult yourretailer or dealer for assistance. The Cooling / Heating Mode Lock sets the unit forcibly to eitherCooling or Heating Mode. This function is convenient when you wish to set all indoor units connected tothe Multi system to the same operation mode.CroomBroomAroomLivingroomOutdoorunit
