SERVICE MANUAL - BVT Partners OÜ

(g)(h)'11 • SCM-SM-110b) Once the fan motor is changed from OFF to ON during the thermostat ON, the indoor fan motor is not turnedOFF even if the heat exchanger thermistor detects lower than 25°C.Note (1) When the defrost control signal is received, it complies with the fan control during defrosting.c) Once the hot start is completed, it will not restart even if the temperature on the heat exchanger thermistor drops.2) During the hot start, the louver horizontal control signal is transmitted.3) When the fan motor is turned OFF for 7 minutes continuously after defrosting, the fan motor is turned ON regardlessof the temperatures detected with the indoor heat exchanger thermistors (ThI-R1, R2).(iii) Ending condition1) If one of following conditions is met during the hot start control, this control is terminated, and the fan is operated withthe set airflow volume.a) Heat exchanger thermistor (ThI-R1 or R2, whichever higher) detects 35°C or higher.b) It has elapsed 7 minutes after starting the hot start control.Hot keepHot keep control is performed at the start of the defrost control.1) Controla) When the indoor heat exchanger temperature (detected with ThI-R1 or R2) drops to 35°C or lower, the speed ofindoor fan is changed to the lower tap at each setting.b) During the hot keep, the louver horizontal control signal is transmitted.2) Ending conditionWhen the indoor fan is at the lower tap at each setting, it returns to the set airflow volume as the indoor heat exchangertemperature rises to 45°C or higher.Thermostat operation(i) Cooling1) Thermostat is operated with the room temperature control.2) Thermostat is turned ON or OFF relative to the set room temperature as shown below.Thermostat ONThermostat OFFTemperature drop-1 +1Temperature riseSet room temperature3) Thermostat is turned ON when the room temperature is in the range of -1 < Set point < +1 at the start of cooling operation(including from heating to cooling).(ii) Heating1) Thermostat is operated with the room temperature control.2) Thermostat is turned ON or OFF relative to the set room temperature as shown below.Thermostat ONThermostat OFFHeater ON-1 +1Temperature riseHeater OFFTemperature drop-1 +13C ◦Set room temperature3) Thermostat is turned ON when the room temperature is in the range of -1 < Set point < +1 at the start of cooling operation(including from cooling to heating).(iii) Fan control during heating thermostat OFF1) Following fan controls during the heating thermostat OFF can be selected with the indoor function setting of the wiredremote controller.1 Low fan speed (Factory default), 2 Set fan speed, 3 Intermittence, 4 Fan OFF