Haier HSU18VCK Service Manual

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HSU18VCK-SM Codes and DescriptionDomesticAirConditioner297. Codes and Description7.1. Problem Symptoms and MeasuresSymptom Check Item Details of MeasureCheck the power supply. Check to make sure that the rated voltage issupplied.None of theunits operates Check the indoor PCB Check to make sure that the indoor PCB isbrokenEquipmentoperates butdoes not cool,or does notheat (only forheat pump)Diagnosis by serviceport pressure andoperating current. Check for insufficient gas.Largeoperatingnoise andvibrationsCheck the installationcondition.Check to make sure that the required spacesfor installation (specified in the Technical Guide,etc.) are provided.7.2 Error Codes and Description indoor displayCode indicationindoorDescriptionE1 Room temperature sensor failureE2 Heat-exchange sensor failureE4 Indoor EEPROM errorIndoor MalfunctionE14 Indoor fan motor malfunctionThe code indication that is listed above is the main faultTrouble shootingCautionBe sure to turn off power switch before connect or disconnect connector, or else parts damage may beoccurred.E1: Room temperature sensor failure CN1E2: Heat-exchange sensor failure CN1