Cause : Over current in Acceleration comes when over current during Acceleration. This fault appears when the motor is drawing excess current during acceleration

An OC1 error in an inverter indicates an overcurrent condition during acceleration. This means the motor connected to the inverter is drawing more current than the inverter is rated for during the start-up phase.

Here's a breakdown of the issue and some troubleshooting steps:

Possible Causes of OC1 Error:

• Rapid Acceleration: If the motor acceleration settings are too aggressive, it can cause a surge in current exceeding the inverter's capacity.
• Mechanical Obstruction: If the motor shaft is seized or has a mechanical blockage, it will require more current to overcome during startup, tripping the OC1 fault.
• Loose Motor Connections: Poor connections between the motor and the inverter can cause excessive current draw due to arcing or resistance.
• Faulty Motor: In rare cases, an internal issue within the motor itself could lead to abnormally high current during acceleration.

Troubleshooting Steps:

1. Check Acceleration Settings: Review the inverter's settings for motor acceleration. Try adjusting the acceleration ramp time to a slower rate and see if the OC1 fault persists. Refer to your inverter's manual for specific instructions on adjusting these settings.
2. Inspect for Mechanical Obstructions: Ensure the motor shaft turns freely by hand. Check for any mechanical binding or external factors that might be hindering motor rotation.
3. Verify Motor Connections: Turn off the inverter's power supply completely. Tighten all the motor cable connections at the inverter terminals and motor terminal box. Ensure all connections are clean and free of corrosion.