Polarity Judge Timeout

What does dv7 mean?

This fault indicates the drive could not detect the motor's polarity within a pre-set length of time during startup or operation. This is typically caused by a disconnection in the motor coil winding or loose screws on the drive's output terminals. Failure to detect polarity prevents the drive from properly controlling the motor, making operation impossible.

Complete Troubleshooting Guide

1. 1

   De-energize the drive and ensure lockout/tagout procedures are followed.

2. 2

   Measure the motor line-to-line resistance; replace the motor if a coil is disconnected or damaged.

3. 3

   Verify and tighten the screws on the drive's output terminals to the correct tightening torque.