Haier AS35S2SD1FA-CL Service Manual

Seivice diagnosis40 Domestic air conditioner* Be sure to turn off power switch before connect or disconnect connector, or partsdamage may be occurred.10.4.3 Indoor DC fan motor faultIndoor Display E14The rotation speed detected by the Hall IC during fan motor operation is used todetermine abnormal fan motor operationwhen the detected rotation feedback singal don’t receiced in 2 minutes■ Operation halt due to breaking of wire inside the fan motor .■ Fan motor overheat protection■ Operation halt due to breaking of the fan motor lead wires■ Detection error due to faulty indoor unit PCB* Caution be sure to turn off power switch before connect or disconnect connector, orelse parts damage may be occurred.How to check Fan Motor (DC)1. Check connector connection.2. Check motor power supply voltage output (pins 1-4).3. Check motor control voltage (pins 4-5).4. Check rotation command voltage output (pins 4-6).5. Check rotation pulse input (pins 4-7).1 Motor power supply voltage2 Unused3 Unused4 P.0V(reference potential)5 Motor control voltage(15VDC)6 Rotation command voltage(1~6VDC)7 Rotation pluse inputNotes: the a/c is electrifying, don’t pull out or insert the terminals of themotor, else the motor would be damaged.*Caution Be sure to turn off power switch before connect or disconnect connector,or else parts damage may be occurred.Replace the indoor or outdoor mainboard.TroubleshootingTroubleshootingMalfunctionDetection ConditionsSupposed CausesMethod ofMalfunction DetectionTroubleshooting