Internal Safety Circuit Fault

What does E.SAF mean?

This fault code indicates a detected malfunction within the inverter's internal safety circuit. When active, it causes the inverter to shut off its output to ensure a safe state, preventing drive operation. This is a critical internal error.

• Internal self-diagnosis failure of the safety monitoring ASIC (Application-Specific Integrated Circuit).
• EMI (Electromagnetic Interference) disturbance affecting the internal safety signal integrity on the control board.
• Hardware degradation or component failure within the safety relay drive circuit.
• Corrupted firmware module responsible for safety integrity monitoring.

Click steps to track your progress.

1. 1

   Record current fault history and operating parameters (e.g., Pr. 093, Pr. 094).

2. 2

   Power cycle the inverter, waiting 30 seconds after DC bus discharge (indicator OFF) before re-applying power.

3. 3

   Verify all external safety inputs (S1, S2, STO) are correctly wired and provide expected feedback (e.g., 24VDC at S1, S2).

4. 4

   Perform a safety circuit self-test if available via diagnostic software (e.g., using 'Safety Configuration Tool' via USB).

5. 5

   Contact technical support with recorded fault codes and system configuration for advanced diagnostics.