Output Current Detection Value Exceeded

What does E.CDO mean?

This fault activates when the inverter's output current surpasses the level defined by Pr. 150 (Output current detection level). It serves as a protective measure, indicating that the motor or load is drawing more current than configured, possibly due to an overload or incorrect parameter settings. Exceeding this limit can lead to inverter or motor damage.

• Motor mechanical overload condition causing it to draw excessive current beyond the set threshold in Pr. 150.
• Incorrect setting of Pr. 150 (Output current detection level), set too low compared to the actual motor's rated current or expected peak load current.
• Short circuit or ground fault condition on the inverter's output wiring (U, V, W) to the motor.
• Motor winding insulation breakdown or phase-to-phase short within the motor itself.
• Inverter current sensor calibration drift or malfunction causing erroneous high current readings.

Click steps to track your progress.

1. 1

   Measure the actual motor operating current under load using a clamp-on ammeter and compare it to the value set in Pr. 150.

2. 2

   Increase the value of Pr. 150 (Output current detection level) slightly, but do not exceed the inverter's rated current, if the motor is operating within its normal limits.

3. 3

   Perform an insulation resistance test (Megger test) on the motor windings and output cables (U, V, W to ground) to check for ground faults (typically >5MΩ).

4. 4

   Disconnect the motor and run the inverter in no-load condition (with Pr. 79 set appropriately) to determine if the fault occurs without the motor.

5. 5

   Check for any mechanical binding, seized bearings, or excessive friction in the driven machinery that could be overloading the motor.