Overspeed Error

What does E81. mean?

An overspeed error occurs when the motor's rotation speed, as detected by the encoder, exceeds the configured 'Overspeed Error Detection Level' (P026) multiplied by the maximum frequency. This can be caused by an incorrect P026 setting, improper encoder wiring, or actual runaway motor conditions. The inverter trips to prevent mechanical damage or unsafe operation.

Additional Steps

Steps 1–2 are listed in Priority Fix.

1. 3

   Review and adjust the 'Overspeed Error Detection Level' (P026) to an appropriate value based on the application's maximum safe speed.

2. 4

   Inspect the load conditions for any mechanical issues that could lead to an uncontrolled acceleration.