LP1

What does 032 mean?

A current-carrying motor phase has failed, or the current limit value is set too low. This can lead to irregular motor operation, reduced performance, or motor damage.

• Open circuit in one of the motor phases (U, V, or W) due to a broken motor winding, faulty connection, or damaged motor cable.
• High resistance connection at the motor terminal block or drive output terminals (U, V, W), leading to significant phase imbalance.
• Drive output current limit (e.g., Parameter C0046) is set significantly below the motor's actual operating current, causing premature current limiting.
• Internal drive fault in the inverter section, causing one phase output to be missing or severely attenuated.
• Loose or corroded connections within the motor terminal box or at intermediate junction points for the motor cable.

Click steps to track your progress.

1. 1

   1. Disconnect the motor power cables from the drive output terminals (U, V, W).

2. 2

   2. Using an ohmmeter, measure the resistance between each motor phase (U-V, V-W, W-U) at the motor terminals. Readings should be balanced within 5%. An open circuit indicates a fault.

3. 3

   3. With the motor disconnected, measure the continuity of each motor cable conductor from the drive end to the motor end.

4. 4

   4. Verify the drive's output current limit parameter (e.g., C0046) is set appropriately, typically at 150-200% of the motor's rated current.

5. 5

   5. Check for loose or corroded connections at the drive's U, V, W output terminals and the motor's terminal block.

6. 6

   6. If motor and cable are confirmed good, perform a test run with a known good motor of similar power rating, if available, to rule out a drive internal fault.