Cause : External temperature 2 comes when measured temperature 2 has exceeded fault limit. The fault code "4982" in your ABB ACS880 drive indicates an external temperature 2 fault.

This means the temperature measured from an external sensor (connected to parameter 35.21) has exceeded the limit set by parameter 35.22 [1].

Understanding External Temperature 2:

• This external temperature sensor could be monitoring various components depending on your setup. It could be for the:

• Bearing housing of the motor
• Gearbox
• Cooling water for a liquid-cooled drive
• Any other component critical to the system's thermal health

Troubleshooting Steps:

1. Safety First: Always ensure the drive is completely de-energized before attempting any troubleshooting steps. Electrical work can be dangerous.
2. Identify External Sensor: Refer to the drive manual for your specific ACS880 model to identify the function connected to parameter 35.21 (External temperature 2 source). This will help you understand which component the sensor is monitoring.
3. Locate Sensor: Physically locate the external temperature sensor within your system based on the identified function from step 2.
4. Inspect Sensor and Connection: Visually inspect the sensor for any signs of damage or corrosion. Check the cable connecting the sensor to the drive for any damage or loose connections.
5. Verify Temperature: If possible, use a separate thermometer to measure the temperature of the component the sensor is monitoring. Compare this reading with the fault threshold set in parameter 35.22 (Temperature 2 fault limit) of the drive.