OL1 fault in an INVT GD10 drive indicates an Overload condition. This means the motor connected to the inverter is drawing more current than its rated capacity or the inverter's output current limit.

Common Causes of OL1 Faults:

1. Mechanical Overload:

   • Excessive Load: The motor may be subjected to a load that exceeds its rated capacity.
   • Mechanical Issues: Mechanical problems like bearing failures, belt slippage, or pump blockages can increase the motor's load.

2. Electrical Overload:

   • Voltage Fluctuations: Variations in the supply voltage can lead to increased motor current draw.
   • Short Circuits: Internal or external short circuits can cause excessive current flow.
   • Incorrect Motor Sizing: The motor may be undersized for the application.

3. Inverter Settings:

   • Incorrect Current Limit: The inverter's current limit may be set too low.
   • Motor Parameter Mismatch: Incorrect motor parameters can lead to inaccurate current calculations.

Troubleshooting Steps:

1. Check the Mechanical Load:

   • Inspect the driven equipment for any signs of mechanical issues.
   • Ensure the load is within the motor's rated capacity.

2. Verify Electrical Connections:

   • Check for loose or damaged connections in the motor and inverter wiring.
   • Inspect the motor windings for signs of damage or overheating.

3. Inspect the Inverter:

   • Verify the inverter's current limit setting and adjust it if necessary.
   • Ensure the motor parameters are correctly configured in the inverter.

4. Monitor Motor Temperature:

   • Use a thermal imaging camera or a contact thermometer to measure the motor's temperature.
   • Excessive temperature can indicate an overload condition.