Special Control SiUS34-801A_b208 VRVIII R-410A Heat Recovery 60Hz7.6.2 Crankcase Heater ControlIn order to prevent the refrigerant from condensing in the compressor oil in the stopped mode, this mode is used to controlthe crankcase heater.7.7 Stopping Operation7.7.1 When System is in Stop Mode (Normal operation stop)This mode is used to define actuator operations when the system stops.Electronic expansion valve(Main) EVM Y1EY3E Y1E 0 plsElectronic expansion valve(Subcooling) EVT Y2EY5E Y3E 0 plsElectronic expansion valve(Refrigerant charge) EVJ Y4E Y2E 80 plsFour-way valve (Heatexchanger switch) 20SA Y2SY9S Y3S HoldsFour-way valve (High/lowpressure gas pipe switch) 20SB Y8S Y2S HoldsSolenoid valve (Main bypass) SVE Y5SY10S Y6S OFFSolenoid valve (Hot gas) SVP Y4S Y5S OFFSolenoid valve (Refrigerantregulator liquid pipe) SVL Y3S Y4S OFFSolenoid valve (Refrigerantregulator gas vent pipe) SVG Y1S Y1S OFFSolenoid valve (Refrigerantregulator exhaust pipe) SVO Y7S Y7S OFFSolenoid valve (Refrigerantregulator discharge pipe) SVT Y6S Y8S OFFEnding conditions — 2 min.Actuator SymbolElect.symbol OperationREYQ REMQ REYQ72~144P REMQ72P REMQ96·120PCompressor1 — M1C M1C OFF OFF OFFCompressor2 — M2C M2C OFF — OFFOutdoor unit fan1 — M1F M1F OFF OFF OFFOutdoor unit fan2 — M2F M2F OFF — —Electronic expansion valve(Main) EVM Y1EY3E Y1E 0 plsElectronic expansion valve(Subcooling) EVT Y2EY5E Y3E 0 plsElectronic expansion valve(Refrigerant charge) EVJ Y4E Y2E 80 plsFour-way valve (Heatexchanger switch) 20SA Y2SY9S Y3S HoldsFour-way valve (High/lowpressure gas pipe switch) 20SB Y8S Y2S HoldsCrankcase heaterOFFCrankcase heaterONDischarge pipetemperature < 158˚FDischarge pipetemperature > 167˚F
