SiUS121502E Field SettingsTrial Operation and Field Settings 1854. Field Settings4.1 Outdoor Unit4.1.1 Priority Room SettingOutline 1. Operation modeThe operation mode of the prioritized room takes precedence. For example, when theprioritized indoor unit starts cooling operation, the other indoor units which have been in heatingoperation enter the standby mode. Heating operation will resume if the prioritized indoor unitstops cooling operation.2. POWERFUL operationThe electronic expansion valves are controlled to provide more capacity to the prioritized roomand the capacities for the other indoor units will be slightly reduced.3. OUTDOOR UNIT QUIET operationWhen the OUTDOOR UNIT QUIET operation is selected in the prioritized room, the outdoorunit runs quietly.(Without priority room setting, OUTDOOR UNIT QUIET operation starts only when the functionis set for all the operating indoor units.)Procedure 1. Turn the circuit breaker off before changing the setting.2. Turn on the one of the switches of the SW4 on the service monitor PCB.Only one room can be set as the priority room.3. Turn the power on.Service monitor PCBHEATCOOL432121EDCBACOOL432121EDCBAScrewON OFFPriority room setting switch (SW4)EDCBARemovethe switchcover.(R22006)
