ULC overload fault

Was bedeutet 8002 ?

The selected signal has exceeded the user overload curve, indicating an overload condition. This often means the motor is under too much mechanical stress or there's a problem with the process being controlled. Sustained overload can lead to motor damage or premature wear.

• Excessive mechanical load on the motor (e.g., jammed conveyor, seized bearing, clogged pump impeller).
• Motor current has exceeded the configured overload curve threshold (e.g., parameter P7-31 'Overload curve 1 current').
• Process conditions have changed (e.g., increased viscosity, higher flow rate) requiring more power than the motor can deliver.
• Incorrectly configured overload curve parameters (e.g., P7-31, P7-32, P7-33) causing a trip during normal, high-load operation.
• Motor supply voltage sag, causing the motor to draw higher current to maintain required torque.

Klicken Sie auf Schritte, um Ihren Fortschritt zu verfolgen.

1. 1

   Inspect the mechanical system for obstructions, seizing components (bearings, gearboxes), or material build-up that could increase motor load.

2. 2

   Monitor the motor's actual current (e.g., via drive display or P_ACT_CURRENT) and compare it to the configured overload curve (P7-31 to P7-33).

3. 3

   Verify the incoming AC mains voltage at the drive's input terminals during operation for significant sags or imbalances.

4. 4

   Review and adjust the overload curve parameters (P7-31: Overload curve 1 current, P7-32: Overload curve 1 speed, P7-33: Overload curve 1 delay) to accurately reflect the application's maximum acceptable load.

5. 5

   Measure motor insulation resistance using a megohmmeter (with drive disconnected) to check for internal winding damage contributing to higher current draw.