Haier AS26TB1HRA Service Manual

Also see for AS26TB1HRA: Operation manual

Service diagnosis38 Domestic air conditioner10.3.9 Overheat Protection For Discharge TemperatureOutdoor display: ■ ★ ■ / F4 LED1 flash 8 timesMethod of The Discharge temperature control is checked with the temperature being detectedMalfunction by the Discharge pipe thermistorDetectionMalfunction when the compressor discharge temperature is above 110℃DecisionConditionsSupposed ■ Electronic expansion valve defectiveCauses ■ Faulty thermistor■ Faulty PCBTroubleshooting * Caution Be sure to turn off power switch before connect or disconnect connector, orelse parts damage may be occurred.Electrify the machine again and turn it on with the remote controller,then measure the temperature at the exhaust temperature sensor ofthe compressor on the outdoor unitThe temperature exceeds110 ℃ shortly after themachine starts up?1) The cryogen may have been leaked duringinstallation, or there may be leakage in the pipingsystem.2) There may be other causes to make the exhausttemperature too high.Malfunctions occur after running for some time eventhough the measured temperature is below 110℃. Pullout the exhaust sensor and measure its resistance atstandard temperatures according to theresistance-temperature tableThe results deviatemuch?The sensor is damaged. Replace the sensorwith a new one.The outdoor mainboard is damaged and needs bereplacedYESNONOYES