Haier D-Series Service Manual
Also see for AS09DCAHRA: Operation manual
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Contents
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Seivice diagnosis39 Domestic air conditionerWhen the thermistor input is more than 4.92V or less than 0.08V during compressoroperation.Note: The values vary slightly in some models■ Faulty connector connection■ Faulty thermistor■ Faulty PCB* Caution Be sure to turn off power switch before connect or disconnect connector, orelse parts 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.10.4.2 EEPROM abnormalIndoor Display E4: Indoor EEPROM errorIndoor display F12: Outdoor EEPROM error; Outdoor LED1 flash 1 timesThe Data detected by the EEPROM are used to determine MCUWhen the data of EEPROM is error or the EEPROM is damaged■ Faulty EEPROM data■ Faulty EEPROM■ Faulty PCBThermistor resistance checkIs it normal?YesNOYesIs it normal?NOCheck the connector connection.Replace the thermistorReplace the indoor unit PCBCorrect the connectionMalfunctionDetection ConditionsSupposed CausesTroubleshootingMalfunctionDetection ConditionsSupposed CausesMethod ofMalfunction Detection |
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