IPM OverCurrent

What does 35 mean?

The current magnitude has exceeded the trip level set by P1640 [IPM Max Cur], as detected by the Intelligent Power Module (IPM). This fault protects the drive from severe damage due to excessive current. If persistent, it strongly indicates an overload, a short circuit condition in the motor or wiring, or an incorrect setting of P1640.

• Sudden increase in motor load beyond the drive's current capability (e.g., severe mechanical jam or obstruction).
• Short circuit between motor phases or from a motor phase to ground in the motor or motor cable.
• Rapid acceleration or deceleration with incorrect ramp times (e.g., P400 [Accel Time 1], P401 [Decel Time 1]).
• Incorrect motor parameters entered into the drive (P2-xx) leading to poor motor model and control.
• Faulty Intelligent Power Module (IPM) or current sensing circuit within the drive.

Click steps to track your progress.

1. 1

   1. Disconnect motor power cable from drive output terminals (U, V, W) and test for phase-to-phase and phase-to-ground shorts in the motor and cable using a megohmmeter (e.g., 500VDC).

2. 2

   2. Verify that motor nameplate parameters (P2-01 to P2-05) are accurately programmed into the drive.

3. 3

   3. Inspect the mechanical load for any binding, obstruction, or excessive friction that could cause an overcurrent.

4. 4

   4. Increase P400 (Accel Time 1) and P401 (Decel Time 1) to reduce current transients if mechanical conditions permit.

5. 5

   5. Monitor the actual output current (e.g., 'A0-04') during operation to identify when the overcurrent occurs.

6. 6

   6. If no external cause is found and the fault persists with the motor disconnected, replace the drive's power section or the entire drive.