Automatic restart start attempts exceeded

What does F07320 mean?

This fault indicates that the drive has attempted to automatically restart after other faults, reaching the maximum number of attempts defined by parameter p1211. It means a recurring issue is present, and the automatic restart function has been deactivated. Manual acknowledgement and resolution of underlying faults are required to prevent continuous, potentially damaging, restart attempts and ensure safe operation.

• A persistent underlying fault (e.g., overcurrent, overvoltage, motor stall) that repeatedly triggers and attempts to clear via automatic restart.
• Incorrectly configured automatic restart parameter p1210 (automatic restart type) or p1211 (number of restart attempts) for the application.
• Intermittent power supply issues (e.g., voltage sags, phase loss) causing recurrent drive trips that auto-restart fails to resolve permanently.
• Mechanical binding or intermittent heavy loading in the connected machinery, causing repetitive motor overload faults.
• Drive control logic issues or parameter conflicts leading to a cycle of fault and restart attempts without addressing the root cause.

Click steps to track your progress.

1. 1

   1. Access the drive's fault history (e.g., r0947, r0949) to identify the specific fault code(s) that are repeatedly triggering the automatic restarts.

2. 2

   2. Set parameter p1211 to 0 (no automatic restarts) temporarily to prevent cycling and allow for detailed fault analysis upon the next trip.

3. 3

   3. Measure the incoming supply voltage (L1, L2, L3) at the drive's input terminals (e.g., U1, V1, W1) during operation to detect voltage anomalies.

4. 4

   4. Inspect the mechanical system driven by the motor for any binding, damage, or excessive friction that could cause repeated overloads.

5. 5

   5. Review all drive parameters related to current limits (e.g., p0640, p0335) and motor protection (e.g., p0610, p0611) for appropriate configuration.

6. 6

   6. Check for proper grounding and shielding of control signals to prevent transient interference from causing spurious faults.