Startup Error / Phase Sequence

What does 9 mean?

This fault encompasses two distinct startup issues. In 'dual-motor operation', it signifies an incorrect line phase sequence, preventing motors from running in the intended clockwise direction. In 'single-motor operation', it means an unexpected current (over 10% IN,unit) is detected on drive 2, usually due to incorrect wiring, such as a drive connected to X9 or two drives being present when only one is allowed. Both scenarios prevent proper unit startup and operation, risking mechanical stress to connected equipment or uncontrolled motor movement.

• Incorrect phase sequence of the incoming three-phase power supply (L1, L2, L3) to the MOVIFIT unit input terminals.
• Motor rotation direction parameter (e.g., P305) is incorrectly set for the intended mechanical operation in dual-motor applications.
• Miswiring of the motor phases (U, V, W) to the drive output terminals (U1/V1/W1 or U2/V2/W2) for one or both motors.
• Internal drive hardware issue affecting phase sequence detection, potentially after a power disturbance.

Click steps to track your progress.

1. 1

   Verify the incoming line phase sequence (L1, L2, L3) at the MOVIFIT input terminals using a phase rotation meter.

2. 2

   If the phase sequence is incorrect, swap any two of the incoming line phases (e.g., L1 and L2) at the main disconnect switch.

3. 3

   For dual-motor operation, check motor rotation direction parameters (e.g., P305 for drive 1, P315 for drive 2) in the MOVIFIT unit's configuration.

4. 4

   Inspect the motor wiring (U, V, W) at the drive output terminals (U1/V1/W1, U2/V2/W2) to ensure correct connection to the motor windings.

5. 5

   Perform a controlled test run with no load to observe actual motor rotation direction and confirm it matches the application requirement.