Haier HSU24VHJ(DB) Service Manual

Also see for HSU24VHJ: Installation manual Service manual

HSU24VHJ˄DB˅ Service DiagnosisDomestic Air Conditioner587.3.6 Overheat Protection For Exhaust TemperatureIndoor display F4outdoor display LED1 flash 8 timesMethod of the exhaust temperature control is checked with the temperature being detectedMalfunction by the exhaust pipe thermistorDetectionMalfunction when the compressor discharge temperature is above 117ćDecisionConditionsSupposed Electronic expansion valve defectiveCauses Faulty thermistorƵ Faulty PCBTroubleshooting * Caution Be sure to turn off power switch before connect or disconnect connector, orelse parts damage may be occurred.YESNOthe temperatureexceeds 110 shortlyćafter the machine1) The cryogen may have been leaked duringinstallation, or there may be leakage in thepiping system.2) There may be other causes to make theexhaust temperature too high.Electrify the machine again and turn it on withthe remote controller, then measure thetemperature at the exhaust temperature sensorof the compressor on the outdoor unitMeasure the temperature at the exhaust temperaturesensor of the compressor on the outdoor unitYESMalfunctions occur after runningfor some time? even though theasured temperature is below117ć.Exhaust temperaturesensor is broken andneeds be replacedNO