SiBE061121 Main FunctionsFunction and Control 181.4 Fan Speed Control for Indoor UnitOutline Phase control and fan speed control contains 9 steps: LLL, LL, SL, L, ML, M, MH, H, and HH.The airflow rate can be automatically controlled depending on the difference between the roomthermistor temperature and the target temperature. This is done through phase control and HallIC control.For more information about Hall IC, refer to the troubleshooting for fan motor on page 81.Automatic FanSpeed ControlIn automatic fan speed operation, the step “SL” is not available.= The airflow rate is automatically controlled within this range when the FAN settingbutton is set to automatic.The following drawing explains the principle of fan speed control for cooling.On heating operation, the fan speed is regulated according to the indoor heat exchangertemperature and the difference between the room thermistor temperature and the targettemperature.Note: 1. During POWERFUL operation, the fan rotates at H tap + 50 rpm.2. The fan stops during defrost operation.Step Cooling HeatingLLLLLLMLMMHHHH (POWERFUL) (R6833) (R6834)(R14635)Fan speed+2.5°C+1.5°C+0.5°CMHMMLL+3°C+2°C+1°CRoom thermistor temperature – target temperature
