Cause : Overheat error comes when the internal temperature of the drive has exceeded the safe operating limit. This could be due to excessive heat buildup within the drive itself or in the connected motor.

"alarm 15" in panasonic servo drive indicate "Overheat" condition. This means the drive itself (not the motor) is getting too hot and exceeding its safe operating temperature.

Troubleshooting Steps:

1. Check Ambient Temperature:

   • Verify that the temperature in the area where the drive is installed is within the manufacturer’s recommended range.
   • If the environment is too hot, consider adding cooling or moving the drive to a cooler location.

2. Ensure Proper Ventilation:

   • Make sure there is adequate space around the drive for airflow.
   • Inspect the drive’s cooling fans to ensure they are working correctly and not obstructed by dust or debris.
   • Clean any dust buildup on the drive’s heat sinks or cooling fins.

3. Review Drive Load:

   • Check that the drive is not being overloaded. If the load is consistently near the maximum rating, consider using a higher-rated drive or reducing the load.
   • Reduce the duty cycle if the drive is being used heavily or continuously at high power.

4. Inspect Electrical Supply:

   • Ensure that the power supply to the drive is stable and within specifications.
   • Check for voltage spikes, drops, or harmonics that could contribute to overheating.

5. Check for Faults or Errors:

   • Look at any fault codes or error messages that the drive might be displaying. These can give more specific information about the cause of the overheating.