"OL2" fault code in "YASKAWA" drive indicates an overcurrent condition, meaning the drive has detected a current higher than its rated capacity.

Potential Causes of OL2 Fault:

• Mechanical Overload: The motor is being subjected to a load that exceeds its rated capacity.
• Incorrect Motor Parameters: The VFD is programmed with incorrect motor parameters, leading to excessive current draw.
• Faulty Motor: A mechanical issue within the motor, such as a bearing failure or winding problem, can cause excessive current.
• External Short Circuit: A short circuit outside the VFD, such as in the motor cables or connections, can trigger an OL2 fault.
• Overheating: Overheating of the motor or VFD can lead to reduced current capacity and cause an OL2 fault.
• VFD Settings: Incorrect VFD settings, such as excessive acceleration or deceleration rates, can cause excessive current.

Troubleshooting Steps:

1. Visual Inspection:

   • Check for any visible signs of damage, overheating, or loose connections on the motor, cables, and VFD.
   • Inspect the motor for any mechanical abnormalities.

2. Verify Motor Parameters:

   • Ensure that the VFD is programmed with the correct motor parameters (voltage, current, frequency, etc.).
   • A mismatch can lead to excessive current draw.

3. Check for External Short Circuits:

   • Inspect the motor cables and connections for any signs of damage or short circuits.
   • Look for any foreign objects that might be causing a short.

4. Measure Motor Current:

   • Use a clamp meter to measure the motor's actual current. Compare it to the rated current.
   • If the measured current is significantly higher, it indicates an overload or other issue.

5. Check for Overheating:

   • Feel the motor and VFD for excessive heat.
   • If they are overheating, it could be due to overload, ventilation problems, or a faulty component.

6. Review VFD Settings:

   • Ensure that the VFD's acceleration, deceleration, and other settings are appropriate for the application.
   • Excessive acceleration or deceleration can cause higher currents.

7. Check for VFD Component Failures:

   • If the above steps don't resolve the issue, there might be a faulty component within the VFD itself.
   • Consult the VFD's manual or contact a technician for further diagnostics.

8. Consider Motor Replacement:

   • If the motor is found to be faulty, it may need to be replaced.