Haier 1U24GR4EAA Service Manual

Contents

Haier 1U24GR4EAA Service Manual Manual pdf 19 page image

Domestic air conditioner8.4.2.3 Indoor AC fan motor malfunctionIndoor Display E14The rotation speed detected by the Hall IC during fan motor operation is used to determineabnormal fan motor operationwhen the detected rotation feedback signal don’t received in 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* Caution Be sure to turn off power switch before connect or disconnect connector, or else partsdamage may be occurred.Service diagnosis17Method ofMalfunctionDetectionMalfunctionDetectionConditionsSupposedCausesYesTroubleshootingCheck 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 replaceYesNoNoYesMeasure whether there is voltage pulse(0-5VDC)between the positions middle wire and black wireof Terminal CN2 on the indoor PCBNothe indoor pcb is damaged and need replacePull out the terminals on the indoormainboard and reinsert them.NoYesIs it ok?Yes