External Fault

What does EF5 mean?

This fault indicates that an external protective device or interlock connected to a specific digital input (corresponding to EF5) has been activated, triggering a trip in the inverter. The specific cause depends on the external device wired to that input. This is a safety feature to stop the drive based on external process conditions, preventing damage to the system or injury.

• Safety interlock (e.g., guard door switch, light curtain) connected to EF5 input has been triggered or is open.
• Damaged wiring leading to the digital input assigned as EF5 (e.g., S5).
• The external device connected to EF5 is faulty or requires calibration/reset.
• Accumulation of dust or debris causing an external sensor (e.g., proximity switch) connected to EF5 to false-trigger.
• Incorrect assignment of the digital input (e.g., P0-08 or similar) to the EF5 fault function.

Click steps to track your progress.

1. 1

   Identify the specific external device or interlock associated with the EF5 input (e.g., S5).

2. 2

   Verify the physical state of the external device (e.g., guard door closed, light curtain clear).

3. 3

   Measure the voltage at the inverter's EF5 input terminal (S5-SC) to confirm the input signal's integrity.

4. 4

   Check for continuity of the connection wires from the external device to the EF5 input terminals.

5. 5

   Clean or recalibrate any sensors or switches connected to EF5 that might be susceptible to environmental factors.