Cause : Motor 1 measured overtemperature comes when a motor overheats, it can lead to reduced performance, decreased lifespan, and even catastrophic failure.

F506 fault in ABB DCS800 drive indicate Motor 1 measured overtemperature. This means the temperature sensor on the motor has detected a temperature above the safe operating limit.

Here's how to troubleshoot and resolve this fault:

1. Check Ambient Temperature and Ventilation:

• Verify the ambient temperature around the motor. High external temperatures can raise motor temperature beyond safe levels.
• Ensure there’s adequate ventilation around the motor. Restricted airflow can cause the motor to overheat.

2. Inspect Cooling System:

• Check the motor cooling fan for proper operation. A damaged or blocked fan can significantly reduce cooling.
• Clean any dust, dirt, or debris from cooling fins or vents on the motor to restore airflow and cooling efficiency.

3. Verify Load and Duty Cycle:

• Check the motor load to ensure it isn’t exceeding the rated capacity. Operating at or near maximum load for extended periods can increase motor temperature.
• Consider adjusting the motor’s duty cycle or reducing the load if it’s consistently operating near its upper limits.

4. Inspect Electrical Connections:

• Inspect all electrical connections between the drive and motor. Loose or corroded connections can lead to increased resistance and heat generation.
• Check for imbalanced phases or high currents on any phase, as this can also lead to overheating.

5. Verify Temperature Sensor Functionality:

• Ensure the temperature sensor on the motor is working correctly. A faulty sensor can give incorrect readings and lead to unnecessary faults.
• If possible, check the sensor calibration or test it with a multimeter to confirm it’s accurately reading temperatures.