Cause : Excess temperature comes when power unit module temperature is excessive. An excess temperature fault "4310" in an ABB ACS880 drive indicates that the internal temperature of the drive has exceeded its safe operating limits.

This can be caused by various factors such as inadequate cooling, excessive ambient temperature, or overloading.

Steps to Diagnose and Resolve Excess Temperature Fault

1. Fault Identification

• Fault Code: Check the drive's display or control panel for the specific fault code related to excess temperature. This confirms that the issue is due to overheating.

2. Initial Checks

• Internal Temperature Reading: Verify the drive’s internal temperature reading using the drive’s diagnostic tools or display. Compare this with the drive’s maximum allowable temperature specified in the manual.
• Ambient Temperature: Measure the ambient temperature around the drive using a thermometer to ensure it is within the acceptable range specified by ABB.

3. Environmental Inspection

• Ventilation: Ensure that the drive has adequate ventilation. Check for any obstructions in the airflow path such as dust buildup, blocked vents, or nearby equipment generating excessive heat.
• Cooling System Functionality: Verify that any cooling systems, including fans and air conditioning units, are functioning correctly. Ensure that the drive’s internal fan is operational.

4. Drive Configuration and Installation

• Installation Location: Confirm that the drive is installed in a location free from direct sunlight, heat sources, and areas with poor airflow.
• Clearances: Check that there is sufficient clearance around the drive for proper airflow as recommended by ABB’s installation guidelines.

5. Load Conditions

• Load Monitoring: Ensure the drive is not operating under excessive load. Compare the actual load with the drive’s rated capacity to make sure the drive is not being overworked.
• Motor and Drive Sizing: Verify that both the motor and drive are correctly sized for the application.