Check wire harness connections between the drive motor and the Motor Control Unit (MCU), and between the MCU and the Central Control Unit (CCU). Verify the shipping system including shipping bolts, spacers and the power cord are removed. If a failure occurs during high-speed spin, the door unlocks after 3 Minutes. 15935 Answers SOURCE: F7 DRIVE MOTOR TACHOMETER ERROR If the control is unable to properly detect motor speed, the machine shuts down.
