Drive Overload

What does F64 mean?

The drive's internal overload protection has tripped, indicating that its output current has exceeded 150% of its rated capacity for 1 minute, or 200% for 3 seconds. This signifies that the drive is being asked to supply more power than it can safely deliver, risking damage to the drive's power components.

• Motor load consistently exceeding the drive's rated output current for an extended period.
• Drive sized incorrectly for the motor and application, leading to continuous operation above its capacity.
• Mechanical issues in the driven equipment (e.g., seized bearings, high friction) causing excessive motor current.
• Drive cooling fan failure or blocked ventilation, leading to internal overheating and thermal trip.
• Motor or cable short circuit (e.g., phase-to-phase, phase-to-ground) causing immediate high current draw.

Click steps to track your progress.

1. 1

   Measure the actual output current from the drive (e.g., at terminals T1, T2, T3) using a clamp-on ammeter and compare to the drive's nameplate rated current.

2. 2

   Verify the motor load by checking mechanical components for binding, excessive friction, or blockages in the driven system.

3. 3

   Ensure the drive's cooling fan is operational and that airflow through the drive's heatsink is unobstructed.

4. 4

   Confirm the drive's rated current capacity is appropriate for the motor's full load amperage (FLA) and the application's duty cycle.

5. 5

   Perform insulation resistance tests (megohm) on the motor windings and motor cable to rule out short circuits.