Functions Controllable unitslgroups Controls up to 50 units/groups (including indoor units. LOSSNAY, DIDO/AP controller) Up to 150 units can be controlled via expansion controller PAC-YG50ECA (AG-150A software needs to be upgraded to Ver. 2.10 or later.) Monitoring functions Temperature Humidity using Al controller) General equipment such as lights on LCD using DIDO controller) Interlock function from Al controller, DIDO controller to indoor units and between DIDO units are available. AG-150A interlock with DIDO controller or free contact on an indoor unit available. .Ver 2.30 or later Energy saving functions Seasonal scheduling and automatic switch over Yearly scheduling on LCD Scheduling fan speed and airflow direction Optimized Start up External temperature interlock control Night setback control License required.