Samsung AQV09NSD Service Manual

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Contents

Samsung ElectronicsTroubleshooting12-2-4 The Outdoor unit Fan error1. Checklist :1) Are the input power voltage and the power connection correct?2) Is the motor wire connected to the outdoor PCB correctly?3) Is there no assembly error or none-assembly in the terminal of motor wire connector?4) Is there no obstacle at the surrounding of motor and propeller?2. Troubleshooting procedureYesYesYesNo NoNoNoNoYesYesIs the Pin voltage of CN01#1, #3 over 250V?Follow the Check Procedure ofoutdoor unit power supply error check.FAN DRIVE CIRCUIT(Q901,Q902 etc.) errorExchange the PCB.Exchange the PCB.MICOM ErrorIs the Pin voltage of CN01 #3, #5within 1V~5V during the operation?Does the Pin voltage of IC01(MICOM)No.13 change?(Square-Wave)Is the Pin voltage of CN01 #6 changedduring the operation?(Square-Wave)Pull out the power cord andexecute the following step after 30 seconds.Exchange the PCB.Disassemble the BLDC FAN Wire.Exchange the PCB.Is the short betweenthe BLDC FAN Wires?Exchange the BLDC FAN MOTOR.12-5Air Marketing Group LLC141 Kinderkamack Rd, Park Ridge, NJ 07656 Tel: 201-782-1782 Fax: 201-782-1783 Web: www.amgair.com Email: info@amgair.com