Cause : Initial Polarity Estimation Timeout comes when disconnection in the motor coil winding or loose output terminals.

• Measure the motor line-to-line resistance and replace the motor if the motor coil winding is open.

• Check for loose terminals. Apply the tightening torque specified in this manual to fasten the terminals

• Ensure that monitor U6-57 displays a value greater than 819 during the initial test runs for the application to prevent the drive from incorrectly determining motor polarity. If U6-57 shows a value less than 819, increase the polarity judge current level set in parameter n8-84.