Detailed Control Functions SiBE34100139 Function2.5 Normal Operation2.5.1 List of Functions in Normal OperationPart Name ElectricSymbol Normal Cooling Normal Heating Normal SimultaneousCooling / HeatingCompressor M1CPI control, High pressureprotection, Low pressureprotection, Td protection,INV protectionPI control, High pressureprotection, Low pressureprotection, Td protection,INV protectionPI control, High pressureprotection, Low pressureprotection, Td protection,INV protectionOutdoor unit fan M1F Cooling fan control• Outdoor unit heatexchanger: Condenser /Cooling fan control• Outdoor unit heatexchanger: Evaporator /Fan step 7 or 8• Outdoor unit heatexchanger: Condenser /Cooling fan control• Outdoor unit heatexchanger: Evaporator /Fan step 7 or 8Electronic expansion valve(Main) Y1E 480 pls• Outdoor unit heatexchanger: Condenser /Liquid pressure control• Outdoor unit heatexchanger: Evaporator /PI control• Outdoor unit heatexchanger: Condenser /Liquid pressure control• Outdoor unit heatexchanger: Evaporator /PI controlElectronic expansion valve(Subcooling) Y3E PI control PI control PI controlElectronic expansion valve(Refrigerant charge) Y2E 41 pls for refrigerantdischarge 41 pls for refrigerantdischarge 41 pls for refrigerantdischargeSolenoid valve (Refrigerantregulator hot gas) Y1S ON for refrigerantdischargeON for refrigerantdischargeON for refrigerantdischargeSolenoid valve (Refrigerantregulator liquid pipe) Y2S ON for refrigerantrecovery ON for refrigerantrecovery ON for refrigerantrecoverySolenoid valve (Refrigerantregulator gas vent pipe) Y3S ON for refrigerantrecoveryON for refrigerantrecoveryON for refrigerantrecoverySolenoid valve (Hot gas) Y4S OFF OFF OFFSolenoid valve (Circuit of oilreturn) Y5S ON ON ONFour way valve (Heatexchanger switch) Y6S OFF• Outdoor unit heatexchanger: Condenser /OFF• Outdoor unit heatexchanger: Evaporator /ON• Outdoor unit heatexchanger: Condenser /OFF• Outdoor unit heatexchanger: Evaporator /ONFour way valve (Dualpressure gas pipe) Y7S ON OFF OFFFour way valve (Mixing unit) Y8S OFF OFF OFFSolenoid valve (Mixing unitinlet) Y9S OFF OFF OFFPart Name ElectricSymbolNormal cooling Normal heatingThermostatON unitThermostatOFF unitStoppingunitThermostatON unitThermostatOFF unitStoppingunitIndoor unit fan M1FRemotecontrollersettingRemotecontrollersettingOFFRemotecontrollersettingLL OFFElectronic expansion valve(Main) Y1E Normalopening 0 pls 0 pls Normalopening 192 pls 192 plsPart Name ElectricSymbol Normal cooling Normal heatingElectronic expansion valve(EVSC) Y1E 0 pls 0 plsElectronic expansion valve(EVHS) Y2E 480 pls ( fully opened ) 480 pls ( fully opened )Electronic expansion valve(EVLS) Y3E 480 pls ( fully opened ) 0 plsElectronic expansion valve(EVH) Y4E 760 pls ( fully opened ) 760 pls ( fully opened )Electronic expansion valve(EVL) Y5E 760 pls ( fully opened ) 0 pls
