Cause: Drive Overload comes when the drive is being subjected to a load exceeding its rated capacity. This can be caused by various factors, including mechanical issues, incorrect settings, or environmental conditions.

"tLOF" fault in Schneider ATV950 drive indicate " Drive Overload" condition. This means the drive is experiencing an overload condition, meaning that the current drawn by the motor is exceeding the drive’s rated capacity. 

Here’s a structured approach to troubleshoot and resolve this issue:

1. Initial Checks:

• Restart the Drive: Power off the drive, wait for a few minutes, and then power it back on. This can sometimes clear transient overload faults.
• Review Fault Logs: Check the drive’s fault logs for any additional details or related fault codes that can provide more context.

2. Inspect Motor and Load:

• Mechanical Inspection: Check the motor and connected load for any mechanical issues such as binding, jamming, or excessive friction.
• Load Analysis: Ensure that the load connected to the motor is within the drive’s rated capacity. Overloading the load can cause the drive to enter an overload condition.

3. Check Drive Settings:

• Overload Settings: Verify the drive’s overload settings and parameters. Ensure that the drive is configured with appropriate overload protection settings according to the motor’s specifications.
• Motor Ratings: Confirm that the drive’s motor settings (e.g., rated current, rated power) match the specifications of the connected motor.

4. Verify Cooling and Ventilation:

• Cooling Fans: Ensure that the drive’s cooling fans are functioning properly and that there is adequate ventilation around the drive.
• Heat Dissipation: Check if the drive’s heat sink or cooling system is clean and free of dust or debris that could impede heat dissipation.

5. Monitor and Analyze Current:

• Current Monitoring: Use the drive’s built-in monitoring tools or external measuring devices to check the current being drawn by the motor.
• Peak Current: Determine if there are any instances of peak current exceeding the drive’s rated capacity and identify any patterns or conditions that lead to these peaks.

6. Inspect Power Supply:

• Voltage Levels: Verify that the power supply voltage is within the specified range for the drive. Low or unstable voltage can cause the drive to draw excessive current.
• Power Quality: Check the power quality to ensure there are no issues such as voltage sags, surges, or harmonics affecting the drive.