Mechanical Weakening Detection 1

What does oL5 mean?

Overtorque occurred, matching the conditions for mechanical weakening detection specified in parameter L6-08. This suggests a mechanical problem on the load side that is causing increased torque demands on the motor, potentially leading to component wear or system inefficiency.

• Mechanical binding, seizing, or excessive friction within the driven load (e.g., worn bearings, misaligned shaft, gearbox fault).
• Overloading of the machine beyond its design limits, requiring the motor to produce torque exceeding Parameter L6-08.
• Insufficient lubrication in the mechanical system, increasing resistance and torque demand.
• Damage to the motor or load coupling causing mechanical stress and increased torque.
• Incorrectly set value for Parameter L6-08 (Mechanical Weakening Detection Level) or Parameter L6-09 (Detection Time), making the detection too sensitive.

Click steps to track your progress.

1. 1

   Inspect the driven machinery (e.g., conveyor, pump, fan) for visible signs of mechanical damage, binding, or excessive wear (e.g., worn belts, broken gears).

2. 2

   If possible, disengage the motor from the load and manually rotate the load to check for unusual resistance or seizing.

3. 3

   Verify lubrication levels and condition of bearings, gearboxes, and other moving parts according to the machine's maintenance schedule.

4. 4

   Measure the current draw of the motor using a clamp meter during operation to compare actual load current against the motor's rated current and the drive's overload settings.

5. 5

   Review and adjust Parameter L6-08 (Mechanical Weakening Detection Level) and L6-09 (Detection Time) to ensure they are appropriate for the application's normal operating torque profile.