Cause : Current Malfunction Before Running comes when a problem with the drive's current control system before the motor starts rotating. This typically suggests an issue with the power supply, motor windings, or the drive's internal circuitry.

Err3 fault in parker AC10 drive indicate Current Malfunction Before Running. This means a problem with the current sensing or motor wiring before the motor starts running.

Steps to Resolve the "Err3 Current Malfunction Before Running" Fault:

1. Check Motor Wiring:

   • Inspect the motor wiring to ensure that all connections are secure and correctly wired according to the motor’s specifications.
   • Look for any loose or damaged cables, especially in the power connections between the drive and the motor.

2. Inspect the Motor:

   • Verify that the motor is in good condition. A short circuit or ground fault in the motor windings can trigger this fault.
   • Use a multimeter to check for continuity and insulation resistance of the motor windings.

3. Drive Output Phases:

   • Check the drive's output phases to ensure there is no short circuit between any of the output phases (U, V, W).
   • You can measure the resistance between these phases and compare it with the expected values from the motor's specifications.

4. Check for Ground Fault:

   • Ensure that there is no ground fault on the motor or the motor cable. Ground faults can cause improper current sensing and lead to this error.

5. Inspect the Drive’s Current Sensors:

   • If possible, check the internal current sensors of the drive. A malfunctioning current sensor can lead to incorrect current readings and trigger the fault.
   • This typically requires professional service or replacement if the sensors are found to be faulty.