Samsung AC0 KNZDCH Series Technical Bulletin
Also see for AM0 SERIES: Installation manualInstallation manual
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TECHNICAL BULLETIN 2019-0008Date: 06/03/2019Subject: Multi-Position Air HandlerModels: AC0**KNZDCH/AA, AM0**TNZDCH/AA, AM0**JNZDCH/AAwww.SamsungHVAC.com TB2019-0008 (REV 7/8/2020) 1Multi-Position Air Handler Blower Troubleshooting© 2020 Samsung HVACMulti-position air handlers use a Genteq X13 constant torque blower motor. Below are the steps that canbe used to troubleshoot the motor if a problem is suspected.The motor rocks back and forth on start up.This is normal operation. Genteq X13 constant torque blower motors have a rotor position circuit-built in. At startup, the motor rocks forward then backward to determine which direction it needs to turn for proper airflow. Donot remove the motor from the blower wheel and housing to test. Without a blower wheel attached, the motorwill not be able to tell which direction to run. It will simply rock back and forth.Airflow is insufficientMake sure there are no restrictions to airflow such as dirty or restrictive air filters, closed dampers or registers, dirtyindoor coil or blower wheel. Ensure the airflow settings are set properly by measuring total external staticpressure and adjusting fan motor speed taps as needed. Refer to the service manual for blower performancecharts that will show airflow for each speed tap at given static pressures.Motor does not runGenteq X13 constant torque blower motors should be supplied line voltage between L & N on the motorconnector at all times even when there is no call for operation. Check for line voltage directly at the L & Nconnection of the motor.Samsung HVAC maintains a policy of ongoing development, specifications are subject to change without notice.230 VAC |
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