7180 Motor overcurrent fault in lenze i550 drive

Fault Code 7180 in a Lenze i550 drive indicates a motor overcurrent fault. This means the motor connected to the drive is drawing more current than its rated capacity, which can lead to overheating and potential damage.

Potential Causes

1. Overloaded Motor:
   • The motor is being asked to do more work than it's designed for.
   • Solution: Reduce the load on the motor or ensure it's rated for the required power.
2. Mechanical Issues:
   • Jamming: The motor or its connected machinery might be jammed, causing excessive current draw.
   • Friction: Increased friction due to misalignment or worn components can lead to higher currents.
   • Solution: Check for mechanical obstructions, ensure proper alignment, and replace worn parts if necessary.
3. Electrical Problems:
   • Short Circuit: A short circuit within the motor windings can cause excessive current.
   • Incorrect Wiring: Improper connections can lead to overloading.
   • Solution: Inspect for short circuits, verify wiring diagrams, and correct any issues.
4. Drive Configuration Issues:
   • Incorrectly configured drive parameters, such as excessive current limits or improper motor data, can trigger the fault.
   • Solution: Review and adjust drive parameters to match the motor and application requirements.
5. External Power Supply Issues:
   • Voltage fluctuations or insufficient power supply can cause the drive to draw excessive current.
   • Solution: Ensure a stable and adequate power supply for the drive.

Troubleshooting Steps

1. Check Motor and Load:
   • Verify that the motor and load are compatible and not overloaded.
   • Inspect for mechanical issues like jamming or binding.
2. Inspect Electrical Connections:
   • Ensure all connections are tight and secure.
   • Look for signs of damage, corrosion, or short circuits.
3. Check Drive Parameters:
   • Verify that the drive parameters, such as current limits and motor data, are correctly set.
   • Consult the drive manual for specific guidelines.
4. Monitor Power Supply:
   • Ensure the power supply is stable and capable of delivering the required current.
   • Use a multimeter to measure voltage and current.