Haier AS18ND3HAA Service Manual

Also see for AS18ND3HAA: Service manual

Contents

Domestic air conditioner10.4Codes and Description10.4.1.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.10.4.2 Error Codes and Description indoor displayCode indication Description ReferencePageindoorIndoor MalfunctionE1 Room temperature sensor failure 2882eruliafrosnesegnahcxe-taeH2E92rorreMORPEEroodnI4E03noitcnuflamrotomnafroodnI41EThe 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.10.4.2.1 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,Service diagnosis28Method ofMalfunctionDetectionMalfunctionnoisiceDConditionsSupposedCausesMethod ofMalfunctionDetectionMalfunctionDetectionConditionsSupposedCausesTroubleshooting or parts damage may be occurred.