Retry count excess

¿Qué significa E.RET ?

This fault indicates that the inverter could not resume operation properly within the programmed number of retries (set by Pr. 67). It signifies a persistent underlying problem that prevents automatic recovery, leading to the inverter tripping after multiple failed attempts. The root cause of the initial fault must be identified and corrected.

• Persistent overcurrent (E.OC) or overvoltage (E.OV) condition occurring shortly after each restart attempt.
• Mechanical overload on the driven machine (e.g., jammed conveyor, seized bearing) causing immediate overload upon restart.
• Faulty input power supply (e.g., phase loss, severe unbalance) preventing stable operation.
• Encoder feedback loss or noise (E.DEV) preventing stable speed control after restart.
• Incorrect deceleration ramp (Pr. 7) setting for the load, causing overvoltage during attempts to stop before retry.

Haga clic en los pasos para seguir su progreso.

1. 1

   Identify the specific fault code that occurs immediately before the 'E.RET' fault is triggered (check fault history Pr. 70 to Pr. 74).

2. 2

   Reduce the number of retry attempts by setting Parameter Pr. 67 (Retry Count) to '0' to prevent continuous restarting and facilitate direct fault diagnosis.

3. 3

   Monitor AC input voltage at terminals R/L1, S/L2, T/L3 during operation for sag or unbalance.

4. 4

   Disconnect the motor from the inverter and attempt to run the inverter in no-load condition to isolate motor or load issues.

5. 5

   Increase the acceleration time (Pr. 6) to reduce initial current demand during start attempts.

6. 6

   Verify that the motor thermal overload parameters (e.g., Pr. 9, Pr. 10, Pr. 11) are correctly configured for the motor's rated current.