Haier 1U12BE2ERA Service Manual

Contents

InstallationsDomestic air conditioner11.4.3 Indoor AC fan motor malfunctionIndoor Display E14Check whether terminalson indoor pcb is well?Electrify the machine again and turn it on in the cooling operation,Measure voltage between the positions 1and 3 of Terminal CN5 onthe indoor PCBthe voltage is about 90-220vaccheck whether motor can runwhen turn on the unitthe indoor motor is damaged and need replaceYESMeasure whether there is voltage pulse(0-5VDC)between the positions middle wire and black wireof Terminal CN2 on the indoor PCBthe indoor pcb is damaged and need replacePull out the terminals on the indoormainboard and reinsert them.Is it ok?The fan speed detected by the Hall IC during fan motor running which is used todetermine the fan motor operatingWhen there is no fan speed feedback signal within 2 minutesOperation halt due to breaking of wire inside the fan motor.Fan motor overheat protectionOperation halt due to breaking of the fan motor lead wiresDetection error due to faulty indoor unit PCB* CautionBe sure to turn off power switch before connect or disconnect connector, or else partsdamage may be causedMethod ofmalfunction detectionMalfunction detectionconditionsTroubleshootingSupposed causes40NOYESYESYES