Daikin FTKS20CVMB(9) Service Manual

Contents

Daikin FTKS20CVMB(9) Service Manual Manual pdf 48 page image

SiENBE04-512A Main FunctionsFunction and Control 391.3 Fan Speed Control for Indoor UnitsControl Mode The airflow rate can be automatically controlled depending on the difference between the settemperature and the room temperature. This is done through phase control and Hall IC control.For more information about Hall IC, refer to trouble shooting for fan motor on page 105.Phase Steps Phase control and fan speed control contains 9 steps: LLL, LL, SL, L, ML, M, MH, H and HH.= Within this range the airflow rate is automatically controlled when the FAN settingbutton is set to automatic.Note: 1. During powerful operation, fan operate H tap + 50 - 90 rpm.2. Fan stops during defrost operation.Automatic AirFlow Control forHeatingThe following drawing explains the principle for fan speed control for heating:Automatic AirFlow Control forCoolingThe following drawing explains the principle of fan speed control for cooling:Step Cooling Heating Dry modeLLL (Heating thermostat OFF)25 · 35kW class :500 - 860 rpm(During powerful operation :850 - 910 rpm)LL (Cooling thermostat OFF)SL (Silent)LMLMMHHHH (Powerful)(R4085) (R4085)-1.5°C-1.5°C-0.5°C-0.5°C-1°C-1°C-2°C-2°CLMLMPhase controlfan speed (R2819)ThermostatsettingtemperatureDifference between roomand set temperature+1.5°C+1.5°C+0.5°C+0.5°C+2°C+2°C+1°C+1°CMMLLfan speedPhase control (R2820)ThermostatsettingtemperatureDifference between roomand set temperature