Haier AP482AKEAA Service Manual

Also see for AP482AKEAA: Service manual Operation and installation manual

Contents

Haier AP482AKEAA Service Manual Manual pdf 31 page image

11. TroubleshootingIs actual pressure detected bypressure gage acceptable?yesnolow pressure failure no high pressure failureyesyesIs high pressure too low? no is pipe blocked?yesRefrigerant charge isneeded. Check if there isrefrigerant leak. If yes,replace pipe.yesdredge pipingChange pressureswitchnoMake them inshort circuitNote: The confirmation time of low pressure failure may be shorter, but high pressure failure confirmationtime is at least 1 hour. Besides, take the ambient temperature into consideration.1) Pressure protectionConfirm the fault accordingto the fault code listDoes system havepressure switch? Are CN17 and CN18in PCB cut off?noReplace PCByesyesnononoyesyesyesyesReplace PCBIs DC voltage betweenboth ends of sensornear 5V or 0V?Replace sensorIs sensor resistanceacceptable?Replace sensorIs sensor short-circuitor open-circuit?check if the wiring iscorrect according towiring diagram2) Sensor failureno reconnectRelocateif sensor is fixedwellCommercial Air Conditioner Model: AP*****EAA AU*****EAA31