A2010 Motor Temperature Alarm in ABB ACS550 Drive
A2010 Motor Temperature in the ABB ACS550 Drive indicates that the motor temperature has reached a high level, based on either the drive's internal thermal model or an external motor temperature sensor. This alarm serves as an early warning that the motor is approaching its maximum allowable operating temperature. If the temperature continues to rise, the drive may generate a Motor Over Temperature (MOT OVER TEMP) fault and stop the motor to prevent damage.
Unlike a fault, A2010 is a warning alarm, allowing corrective action before a protective trip occurs.
Possible Causes
- Motor overloaded.
- Continuous operation above the motor's rated current.
- Poor motor cooling.
- Cooling fan failure.
- Blocked motor ventilation openings.
- High ambient temperature.
- Frequent starts and stops causing excessive heating.
- Incorrect motor thermal protection parameter settings.
- Incorrect motor nameplate data.
- Parameters 3005–3009 configured incorrectly.
- Faulty motor temperature sensor.
- Loose or damaged temperature sensor wiring.
- Incorrect settings in Group 35 – Motor Temperature Measurement.
- Mechanical overload on the driven equipment.
- Motor bearing problems causing increased heating.
Solutions
- Reduce the motor load.
- Check for mechanical overload on the driven equipment.
- Verify the motor current is within the rated value.
- Inspect the motor cooling fan for proper operation.
- Clean blocked ventilation openings.
- Improve ventilation around the motor.
- Reduce the ambient temperature if possible.
- Verify the motor nameplate data is correctly entered.
- Check and adjust Parameters 3005–3009 used by the motor thermal model.
- Inspect the motor temperature sensor.
- Check the sensor wiring for loose or damaged connections.
- Verify the configuration of Group 35 – Motor Temperature Measurement.
- Replace a faulty temperature sensor if necessary.
- Allow the motor to cool before restarting if the temperature is excessive.
- Contact ABB technical support if the alarm persists after inspection.
Additional Information
The ABB ACS550 protects the motor against overheating using one of two methods:
- Internal motor thermal model, which estimates motor temperature based on operating conditions.
- External motor temperature sensors, such as PTC, PT100, or other supported sensors configured through Group 35 – Motor Temperature Measurement.
When the calculated or measured motor temperature reaches the warning threshold, the drive generates A2010 Motor Temperature.
ABB recommends checking:
- Parameters 3005–3009, which define the motor thermal model used for temperature estimation.
- Group 35 – Motor Temperature Measurement, if external temperature sensors are installed.
Common causes include:
- Excessive motor loading.
- Poor cooling.
- High ambient temperatures.
- Incorrect thermal protection settings.
- Faulty temperature sensors.
Unlike a Motor Over Temperature Fault, A2010 is an early warning that allows corrective action before the drive trips.
Common Symptoms
- Drive displays A2010 Motor Temperature alarm.
- Motor operates normally but is running hot.
- Alarm appears during heavy load operation.
- Alarm occurs after extended running periods.
- Motor cooling fan runs continuously.
- High motor surface temperature.
- Alarm disappears after the motor cools.
- Motor current is close to the rated value.
- Alarm may precede a Motor Over Temperature fault.
- No immediate drive shutdown occurs.
Recommended Troubleshooting Sequence
- Reduce the motor load.
- Check for mechanical overload.
- Verify the motor current is within the rated value.
- Inspect the motor cooling fan.
- Clean motor ventilation openings.
- Check the ambient temperature.
- Verify the motor nameplate data.
- Review Parameters 3005–3009.
- Inspect the motor temperature sensor.
- Check sensor wiring.
- Verify Group 35 – Motor Temperature Measurement settings.
- Replace defective sensors if necessary.
- Allow the motor to cool.
- Confirm the alarm clears.
- Contact ABB technical support if the alarm persists.
Motor Temperature Check Table
| Check Point | Action |
|---|---|
| Motor load | Reduce if excessive |
| Mechanical load | Inspect driven equipment |
| Motor current | Verify within rated value |
| Cooling fan | Check proper operation |
| Ventilation | Clean air passages |
| Ambient temperature | Verify within specification |
| Parameters 3005–3009 | Review thermal model settings |
| Motor temperature sensor | Inspect for proper operation |
| Sensor wiring | Check for loose or damaged connections |
| Group 35 | Verify Motor Temperature Measurement settings |
| Motor cooling | Allow the motor to cool if necessary |
| ABB technical support | Contact if the alarm remains after inspection |
Preventive Maintenance Tips
- Avoid operating the motor continuously above its rated load.
- Keep motor cooling fans and ventilation openings clean.
- Inspect motor bearings regularly to reduce friction and heat generation.
- Verify motor current remains within the rated value during operation.
- Review Parameters 3005–3009 after motor replacement or recommissioning.
- Periodically test motor temperature sensors and associated wiring.
- Verify Group 35 – Motor Temperature Measurement settings during scheduled maintenance.
- Maintain adequate ventilation and ambient temperature around the motor.
- Monitor motor temperature trends to detect developing problems early.
- Record recurring motor temperature alarms to assist long-term diagnostics.
Proper monitoring of motor load, routine maintenance of the motor cooling system, correct adjustment of Parameters 3005–3009, verification of Group 35 – Motor Temperature Measurement, and regular inspection of the motor temperature sensors and wiring will help prevent recurring A2010 Motor Temperature alarms in ABB ACS550 drives, ensuring reliable motor protection, efficient operation, and dependable long-term performance of the drive system.
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