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PACD011001C2 Operation Flowcharts Cooling operation ∗18 Start control in progress? YES NO YES Oil equalization in progress? NO ∗19 Compressor protection operation in progress? YES NO ∗22 Low temperature protection operation in progress? YES NO Inverter compressor magnetic K1M contactor Inverter output frequency INV Standard compressor K2M magnetic contactor Y1E Electronic expansion valve Solenoid valve (hot gas) ON 30~116 Hz by PI control ∗20 ON/OFF by PI control OFF 38 Hz 42 Hz ON OFF Open OFF Y2S Solenoid valve (injection) Y3S Y4S ∗21 Y1R 4-way valve M1F Fan M2F Fan 30~116 Hz by PI and protective control ON/OFF by PI and protective control 30~116 Hz ON/OFF by saturation temperature corresponding to suction pressure OFF ON ON/OFF by discharge temperature protection control ON OFF H ON H ON ∗22 B Troubleshooting Urban Multi “MX1, ME1 Series” Using R-22 (VF027) 143
