K8NM : Locked Rotor Motor

  • A bug exists in older motor control software that may falsely trigger this error code when there is neither a locked rotor, nor mechanical issues or damage to the proportioner motor.  Upgrade sofrware to system version 2.01.001 (Motor Control Module 2.01.001) or greater.


  • Repair or replace chemical pump.


  • Check pump gear trains for damage and repair or replace as necessary.


  • Remove pump gear housings from motor and check that motor shaft rotates freely in direction indicated on motor housing.