Haier 2U14CS1ERA Service Manual

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Haier 2U14CS1ERA Service Manual Manual pdf 59 page image

2U14CS1ERA-SM Service diagnosis56Domestic Air Conditioner7.4.3 Indoor AC fan motor malfunctionIndoor Display E14Method of The rotation speed detected by the Hall IC during fan motor operation is used to determineMalfunction abnormal fan motor operationDetectionMalfunction when the detected rotation feedback singal don’t receiced in 2 minutesDecisionConditionsSupposed Ƶ Operation halt due to breaking of wire inside the fan motor .Causes Ƶ Fan motor overheat protectionƵ Operation halt due to breaking of the fan motor lead wiresƵ Detection error due to faulty indoor unit PCBTroubleshooting * Caution Be sure to turn off power switch before connect or disconnect connector,or else parts damage may be occurred.Check 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 CN2on the indoor PCBthe voltage is about 90-220vaccheck whether motor can runwhen turn on the unitthe indoor motor is damaged and need replaceYes1212 Measure whether there is voltage pulse(0-5VDC)between the positions middle wire and black wireof Terminal CN7 on the indoor PCB12the indoor pcb is damaged and need replacePull out the terminals on the indoormainboard and reinsert them.1RIs it ok?