Haier AS12NB1HRA-White Service Manual

Also see for AS07BS4HRA: Operation manual and installation guide

Contents

Seivice diagnosisDomestic air conditioner11.4.1 Thermistor or Related AbnormalityThe temperatures detected by the thermistors are used to determine thermistor errorswhen the thermistor input is more than 4.92V or less than 0.08V during compressoroperation.Note: The values vary slightly in some modelsFaulty connector connectionFaulty thermistorFaulty PCB* Caution Be sure to turn off power switch before connect or disconnect connector, or elseparts damage may be occurred.Thermistor resistance check method:Remove the connector of the thermistor on the PCB, and measure the resistance of thermistor using tester. Therelationship between normal temperature and resistance is shown in the value of indoor thermistor.*Thermistor resistance checkNOYESYESCheck the connector connection,whether if it loose or misplug Re-connectNOReplace the thermistorReplace the indoor PCBIs the resistance is conformitywith normal temperatureE1: Room temperature sensor failureE2: Heat-exchange sensor failureLED1 flash 10 times Defrost temperature sensor failureLED1 flash 11 times Suction temperature sensor failureLED1 flash 12 times Ambient temperature sensor failureLED1 flash 13 times Discharge temperature sensor failureIndoor displayOutdoor displayMethod ofmalfunction detectionMalfunction detectionconditionsTroubleshootingSupposed causesYES