Troubleshooting88 Samsung Electronics4-5-9 GAS leak error(E554)1. Check items1) Is refrigerant charged?2) Is the evaporator sensor of indoor unit connected correctly?2. Check procedureDoes the error occur?YesNo Normal operationYesNoAre the service valves fully opened?YesNo Open the service valvesIs the evaporator sensor ofindoor unit connected correctly?YesNo Connect the sensor’s connectorYesNo Charge refrigerantIs the value of resistancebetween each phase(*) for compressorsmaller than 2ȍ"Exchange the compressor(*) U V, V W, W UIs refrigerant charged?Exchange INVERTER PCB4-6-9
