Cause Analysis and Troubleshooting of ACS580 Inverter Warnings A581 and FAULT 5080

Cause Analysis

The ACS580 inverter may encounter warnings such as A581 (AUX code 0000 0001 Coolingyou fan stuck or disconnected) or FAULT 5080 (fan failure) during operation. These errors are closely related to the inverter’s cooling fan system.

Warning A581: This warning indicates that the auxiliary cooling fan of the inverter may be stuck or disconnected. When the fan speed is insufficient or has completely stopped, the system fails to receive normal tachometer pulse feedback, triggering this warning. Although the inverter may temporarily continue to operate in warning mode, prolonged operation can potentially cause further damage to the equipment.

FAULT 5080: This is a more severe error, indicating that the cooling fan has completely stopped working and is not outputting any tachometer pulse signals. This typically implies that the fan motor is damaged, the power line is disconnected, or the control signal is lost, causing the inverter to be unable to cool effectively. This can lead to overheating and direct shutdown to protect the equipment from further damage.

Troubleshooting

To address the A581 and FAULT 5080 issues with the ACS580 inverter, follow these troubleshooting steps:

1. Check Auxiliary Codes:
   • Begin by identifying the affected fan based on the auxiliary code in the alarm message (e.g., AUX code 0000 0001 for A581). Code 0 usually indicates the main fan 1, while XYZ-formatted codes can further indicate the fan’s status and index.
2. Inspect Fan Operation:
   • Visually inspect the fan’s physical operation to confirm whether it is spinning. If the fan is not rotating, check the power lines for secure connections, absence of shorts or breaks.
3. Measure Tachometer Pulses:
   • Use an oscilloscope or tachometer to measure the fan’s tachometer pulse signal. Under normal conditions, the signal should be stable and at an appropriate frequency. Weak or unstable signals may indicate issues with the fan motor or sensor.
4. Verify Power and Control Wiring:
   • Ensure the fan’s power and control wiring are connected correctly, without damage or poor contact. Check fuses and relays for proper functioning and stable power supply.
5. Replace Faulty Fan:
   • If the fan is confirmed faulty, promptly replace it with a new one. During replacement, ensure the fan’s model and specifications match the original equipment, and install and wire it correctly.
6. Cleaning and Maintenance:
   • Regularly clean and maintain the inverter and its cooling system, removing dust and debris to keep air passages clear and enhance cooling efficiency.
7. Software Settings Review:
   • Access the inverter’s setup interface to review settings related to fan control. Ensure all control logic and alarm thresholds are configured correctly, avoiding unnecessary shutdowns due to false alarms.
8. Contact Technical Support:
   • If the above steps fail to resolve the issue, promptly contact Longi’s technical support team or professional service personnel for specialized assistance and solutions.

In conclusion, by methodically troubleshooting and diligently maintaining the ACS580 inverter, potential issues causing warnings A581 and FAULT 5080 can be effectively identified and resolved, ensuring the stable operation of the inverter.