Haier 1U18BR4EAA Service Manual

Contents

Haier 1U18BR4EAA Service Manual Manual pdf 17 page image

Domestic air conditioner8.4Codes and Description8.4.1.Problem Symptoms and MeasuresSymptom Check Item Details of MeasureNone of the unitsoperatesCheck the power supply. Check to make sure that the rated voltage issupplied.Check the indoor PCB Check to make sure that the indoor PCB is brokenEquipmentoperates but doesnot cool, or doesnot heat (only forheat pump)Diagnosis by serviceport pressure andoperating current. Check for insufficient gas.Large operatingnoise andvibrationsCheck the installationcondition.Check to make sure that the required spaces forinstallation (specified in the Technical Guide, etc.) areprovided.8.4.2 Error Codes and Description indoor displayCode indication Description ReferencePageindoorIndoor MalfunctionE1 Room temperature sensor failure 1991eruliafrosnesegnahcxe-taeH2E02rorreMORPEEroodnI4E12noitcnuflamrotomnafroodnI41EThe code indication that is listed above is the main faultTroubleshootingCaution Be sure to turn off power switch before connect or disconnect connector, or else parts damagemay be occurred.8.4.2.1 Thermistor or Related AbnormalityIndoor Display E1: Room temperature sensor failureE2: Heat-exchange sensor failureMethod of The temperatures detected by the thermistors are used to determine thermistor errorsMalfunctionDetectionMalfunction when the thermistor input is more than 4.92V or less than 0.08V during compressor.noitareponoisiceDConditionsNote: The values vary slightly in some modelsSupposedFaulty connector connectionCausesFaulty thermistorFaulty PCBTroubleshooting * Caution Be sure to turn off power switch before connect or disconnect connector,Seivice diagnosis15Method ofMalfunctionDetectionMalfunctionnoisiceDConditionsSupposedMethod ofMalfunctionDetectionMalfunctionDetectionConditionsSupposedCausesTroubleshooting or else parts damage may be occurred.