Daikin VRV III REYQ8PY1B Service Manual

Also see for VRV III REYQ10PY1B: Installation manual Operation manual

Contents

Daikin VRV III REYQ8PY1B Service Manual Manual pdf 116 page image

SiBE37-701 Basic ControlFunction 1052. Basic Control2.1 Normal Operation2.1.1 List of Functions in Normal Operation*1. PI control : Evaporator outlet superheated degree (SH) constant.*2. PI control : Condenser outlet subcooled degree (SC) constant.*1 and 2 : Refer to “6.4 Control of Electronic Expansion Valve” on page 147.Part Name Symbol(ElectricSymbol) Function of Functional PartREYQ REMQ Normal Cooling Normal Heating Normal SimultaneousCooling / HeatingCompressor 1M1C M1C PI control, Highpressure protection,Low pressureprotection,Td protection,INV protection,PI control, Highpressure protection,Low pressureprotection,Td protection,INV protection,PI control, Highpressure protection,Low pressureprotection,Td protection,INV protection,Compressor 2 M2C M2CCompressor 3  M3COutdoor unit fan 1M1F M1FCooling fan controlOutdoor unit heatexchanger:Condenser / Coolingfan controlOutdoor unit heatexchanger:Evaporator / Fan stepOutdoor unit heatexchanger:Condenser / Coolingfan controlOutdoor unit heatexchanger:Evaporator / Fan stepOutdoor unit fan 2 M2F M2FElectronic expansion valve(Main) EVMY1EY1E 1375 plsOutdoor unit heatexchanger:Condenser / Liquidpressure controlOutdoor unit heatexchanger:Evaporator / PI controlOutdoor unit heatexchanger:Condenser / Liquidpressure controlOutdoor unit heatexchanger:Evaporator / PI controlY3EElectronic expansion valve(Supercooling) EVT Y2E Y3E PI control PI control PI controlY5EElectronic expansion valve(Refrigerant charge) EVJ Y4E Y2E 80 pls 80 pls 80 plsFour way valve(Heat exchanger switch) 20SAY2SY3S OFFOutdoor unit heatexchanger:Condenser / OFFOutdoor unit heatexchanger:Evaporator / ONOutdoor unit heatexchanger:Condenser / OFFOutdoor unit heatexchanger:Evaporator / ONY9SFour way valve (High/lowpressure gas pipe switch) 20SB Y8S Y2S ON OFF OFFSolenoid valve (Main bypass) SVE Y5S Y6S ON OFF OFFY10SSolenoid valve (Hot gas) SVP Y4S Y5S OFF OFF OFFSolenoid valve (Refrigerantregulator liquid pipe) SVL Y3S Y4S ON for refrigerantrecovery ON for refrigerantrecovery ON for refrigerantrecoverySolenoid valve (Refrigerantregulator gas vent pipe) SVG Y1S Y1S ON for refrigerantrecovery ON for refrigerantrecovery ON for refrigerantrecoverySolenoid valve (Refrigerantregulator exhaust pipe) SVO Y7S Y7S ON for refrigerantdischarge ON for refrigerantdischarge ON for refrigerantdischargeSolenoid valve (Refrigerantregulator discharge pipe) SVT Y6S Y8S ON for oil level control ON for oil level control ON for oil level controlIndoor unit actuator Normal cooling Normal heatingFanThermostat ON unit Remote controller setting Remote controller settingStopping unit OFF OFFThermostat OFF unit Remote controller setting LLElectronicexpansionvalveThermostat ON unit Normal opening *1 Normal opening *2Stopping unit 0 pls 192 plsThermostat OFF unit 0 pls 192 plsBS unit actuatior Electoricsymbol Normal cooling Nomal heating / Nomal simultaneous Cooling /Heating operationElectronic expantion valve (EVH) Y4E 760 pls (fully opened) 760 pls ( fully opened )Electronic expantion valve (EVL) Y5E 760 pls (fully opened) 0 plsElectronic expantion valve (EVHS) Y2E 480 pls (fully opened) 480 pls ( fully opened )Electronic expantion valve (EVLS) Y3E 480 pls (fully opened) 0 plsElectronic expantion valve (EVSC) Y1E 0 pls 0 pls (simultaneous Cooling / Heating operation : PI control)