External Fault During Output Operation

What does E.EF mean?

This fault indicates that an external protective device or system has detected an anomaly and triggered an input to the FR-A800 inverter, causing it to trip while it was providing output to the motor.

• Activation of an external thermal relay, safety switch, limit switch, or other protective device connected to the FR-A800's external fault input terminals (e.g., X50).
• Incorrect wiring or malfunction of the external fault input circuit.
• Inappropriate setting of the external fault input (e.g., Pr.155, Pr.156 for input terminal functions, Pr.190-Pr.196 for output terminal functions).
• External process condition exceeding limits (e.g., over-temperature, low pressure) triggering a protective trip.
• Electrical noise causing a false trigger on the external fault input.

Click steps to track your progress.

1. 1

   Identify which external device or system is connected to the FR-A800's external fault input (e.g., X50, X51) and check its status.

2. 2

   Inspect the wiring of the external fault input for any damage, loose connections, or short circuits.

3. 3

   Verify the condition of the external protective device itself (e.g., check contacts of thermal relay, actuation of limit switch).

4. 4

   Check the parameters related to the external fault input (e.g., Pr.155 External thermal relay input, Pr.156 External fault input) to ensure correct configuration.

5. 5

   Ensure that the external process conditions are normal and not triggering the protective device.