3WAY VRF SYSTEMControl Functions1 - 361234567899. Defrost ControlE : Evaporator operationC : Condenser operationS : Stop or shut off the refrigerantE→C : Switching from evaporator operation to condenser operationC→E : Switching from condenser operation to evaporator operationNormaloperationOutdoor unit cycle defrost processingNormaloperationOutdoorunitdelay-startcontrol1stDefrostgroup Switch2ndDefrostgroup SwitchControl time - 1 min Max 10 min 1 min Max 10 min 1 min -Outdoorunit(s)DefrostoccursfirstHeatexchanger E E→C C C S S E E ES S C C C→ECompressor ON ON ON OFF ON OFF ONFan ON OFF OFF OFF ON OFF ONDefrostoccurssecondHeatexchanger E or S E E E→C C C S C→E E or SS S C CCompressor ON or S ON ON OFF ON OFF ON or SFan ON or S ON ON OFF OFF OFF ON or SIndoorunitsMode ThermostatStop- S S S S S S S*1(Cooling) S S S S S S S*2(Heating) S S S S S S SFan- S S S S S S S*1(Cooling) S S S S S S S*2(Heating) S S S S S S SCoolingON E E E E E E EOFF S S S S S S SHeatingON C S S S S S COFF C S S S S S COFF *3 S S S S S S S*1 Function when a common use solenoid valve kit is used and there are more than one (1) indoor unit in thecooling mode within the same solenoid valve kit.*2 Function when a common use solenoid valve kit is used and there are more than one (1) indoor unit in theheating mode within the same solenoid valve kit.*3 Only for Concealed Duct - High Static Type Indoor Unit (Type E1)
